Reliable System Protection Protector Trip Relays - · PDF fileProtector Trip Relays ... including over and under-voltage, current, ... An internal differential setting of 1% reduces

Reliable System Protection Protector Trip Relays

www.byramlabs.com [email protected] (800) 766 - 1212

2

Protector Trip Relays

250 Series DIN-rail and Wall Mounted Single and three-phase protector relays offering continuous surveillance of electrical parameters with adjustable set point limits, differentials and time delay settings. Pro-vide an alarm or initiation signal when the measured parameter moves outside the set point limit. An extensive range of electronic control products providing continuous monitoring and protection of any electrical parameter. When the monitored parameter deviates from the desired set point limit, the relay will operate to prevent damage to the power as-set. Designed to suit a wide variety of applications the range offers both traditional and technologically advanced products, from single parameter units through to multi-functional microprocessor based protection relays. This versatile range features a host of DIN-rail or wall mounted protectors offering numerous trip functions for single and three-phase power systems, including over and under-voltage, current, frequency, three-phase sequence, phase failure and phase

balance. For the specific protection of generator sets, the range offers unbalanced current, reverse power flow, reverse VAr, syncro-check and under/over-speed trip relay functions. Various dc models provide pro-tection of battery and UPS systems and a range of temperature protection products is ideal to prevent the damaging effects of overheating.

Features

Benefits

Applications

Continuous monitoring of any electrical parameter Monitoring for under and over-current conditions Ensures load current is within generator capacity DIN-rail or wall mounted Range of outputs and configurations Adjustable trip points, time delay and differentials LED trip indication Designed to avoid nuisance tripping

Protection of power assets Detection and isolation of faults Maintains supply continuity of healthy circuits High speed tripping to avoid damage

Switchgear Distribution systems Generator sets Control panels Energy management Building management Utility power monitoring Process control Motor protection Equipment and network protection

All information contained herein including drawings, illustrations and graphic designs, reflects our present understanding and is to the best of our knowledge and believed to be correct and reliable. Users, however, should independently evaluate the suitability of each product for the desired application. Under no circumstances does this constitute an assurance of any particular quality or performance. Such an assur-ance is only provided in the context of Crompton product specifications or explicit contractual arrangements.

©2014 Byram Laboratories, Inc.

www.byramlabs.com [email protected] (800) 766 – 1212

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Protector Type Page

Table of Contents

Basler—Crompton Cross Reference .................................................................. 4 AC Current with Adjustable Time Delay ............................................................ 6 AC Voltage with Adjustable Time Delay ............................................................ 9 AC Voltage with Adjustable Differential ........................................................... 12 Frequency .................................................................................................. 16 Combined Under/Over-Voltage and Frequency ................................................ 18 Phase Sequence and Phase Failure ................................................................ 20 Phase Balance ............................................................................................ 22 Synchro-Check (paralleling) .......................................................................... 24 Thermistor Trip ........................................................................................... 26 Hot Spot 3 Temperature Relay ...................................................................... 28 Hot Spot 6 Temperature Relay ...................................................................... 30 DC Millivolts/Thermocouple ......................................................................... 32 DC Transducer Trip ..................................................................................... 34 Reverse Power ............................................................................................ 36 250 Series Protectors CSA and UL Markings .................................................... 39

Protector Type ANSI Page

Synchro-Check (paralleling) 25 24

AC Voltage with Adjustable Time Delay 27 10

AC Voltage with Adjustable Differential 27 13

AC Voltage with Adjustable Differential (cont.) 27 14

AC Voltage with Adjustable Differential 27/59 13

Combined Under/Over-Voltage and Frequency 27/59, 81O/U 18

Reverse Power (current) 32 37

AC Current with Adjustable Time Delay 37 7

AC Current with Adjustable Time Delay 37/51 7

Phase Sequence and Phase Failure 47 20

Phase Balance 47 22

Phase Balance 47/27 22

Thermistor Trip 49 26

Hot Spot 3 Temperature Relay 49 28

Hot Spot 6 Temperature Relay 49 30

DC Millivolts/Thermocouple 49 33

AC Current with Adjustable Time Delay 51 7

AC Voltage with Adjustable Time Delay 59 10

AC Voltage with Adjustable Differential 59 13

AC Voltage with Adjustable Differential (cont.) 59 14

DC Millivolts/Thermocouple 74 33

DC Transducer Trip 74 34

Frequency 81O 17

Frequency 81O/U 17

Frequency 81U 17

ANSI Index


4

Basler Part Number Crompton Equivalent Page Reference Ordering Number

BE3-25-1A1N4 256-PLLU-120 24 1C4932

BE3-25-1A1N5 256-PLDU-120 24 1C4937

BE3-25-1B1N4 256-PLLU-240 24 1C4934

BE3-25-1B1N5 256-PLDU-240 24 1C4939

BE3-25-1D1N4 256-PLLU-480 24 1C4936

BE3-25-1D1N5 256-PLDU-480 24 1C4941

BE3-27-1A1N2 252-PVUU-120 13 1C4798

BE3-27-1B1N2 252-PVUU-240 13 1C4801

BE3-27-1D1N2 252-PVUU-480 13 1C4803

BE3-27-3A1N2 252-PVKU-120 13 1C4816

BE3-27-3B1N2 252-PVKU-240 13 1C4819

BE3-27-3D1N2 252-PVKU-480 13 1C4820

BE3-27-4C1N2 252-PVVU-220 14 1C4833

BE3-27-4D1N2 252-PVVU-277 14 1C4835

BE3-27-59-1A1N3 253-PVBU-120 13 1C4810

BE3-27-59-1B1N3 253-PVBU-240 13 1C4813

BE3-27-59-3A1N3 253-PVMU-120 13 1C4826

BE3-27-59-3B1N3 253-PVMU-240 13 1C4829

BE3-27-59-3D1N3 253-PVMU-480 13 1C4830

BE3-27-59-4C1N3 253-PVEU-220 14 1C4845

BE3-27-59-4D1N3 253-PVEU-277 14 1C4847

BE3-27-59-81O-U-1A4N3 256-PHVU-120 18 1C4896

BE3-27-59-81O-U-1B4N3 256-PHVU-240 18 1C4898

BE3-27T-1A1N2 252-PVZU-120 10 1C4849

BE3-27T-1B1N2 252-PVZU-240 10 1C4852

BE3-27T-3A1N2 252-PVJU-120 10 1C4859

BE3-27T-3B1N2 252-PVJU-240 10 1C4862

BE3-27T-3D1N2 252-PVJU-480 10 1C4863

BE3-27T-4A1N2 252-PVXU-120 10 1C4869

BE3-27T-4C1N2 252-PVXU-220 10 1C4871

BE3-27T-4D1N2 252-PVXU-277 10 1C4873

BE3-32-1A1N1 256-PASU-120 37 1C4912

BE3-32-1B1N1 256-PASU-240 37 1C4914

BE3-32-3A1N1 256-PATU-120 37 1C4917

BE3-32-3B1N1 256-PATU-240 37 1C4919

BE3-32-3D1N1 256-PATU-480 37 1C4921

BE3-37-1E1A1 252-PAUU-120 7 1C3846

BE3-47-3A4N2 252-PVRU-120 20 1C4901

BE3-47-3B4N2 252-PVRU-240 20 1C4971

BE3-47-3D4N2 252-PVRU-480 20 1C4973

Basler—Crompton Cross Reference


5

Basler—Crompton Cross Reference (cont.)

Basler Part Number Crompton Equivalent Page Reference Ordering Number

BE3-47N-27-3A4N2 252-PSGU-120 22 1C4907

BE3-47N-27-3B4N2 252-PSGU-240 22 1C4909

BE3-47N-27-3D4N2 252-PSGU-480 22 1C4911

BE3-47N-3A4N2 252-PSFU-120 22 1C4902

BE3-47N-3B4N2 252-PSFU-240 22 1C4904

BE3-47N-3D4N2 252-PSFU-480 22 1C4906

BE3-49R-5H5A1 256-PRAU-R1BX 28 1C4944

BE3-49R-5J5A1 256-PCCU-R1BX 30 1C4953

BE3-49R-5K5A1 256-PCCU-R2BX 30 1C4954

BE3-49T-6N5A1 252-PTOU-TJBX 33 1C4960

BE3-49T-6P5A1 252-PTOU-TKBX 33 1C4961

BE3-51-1E1A1 252-PAOU-120 7 1C1697

BE3-51-3E1E1 253-PAPU-DC24 7 1C4789

BE3-59-1A1N1 252-PVOU-120 13 1C4804

BE3-59-1B1N1 252-PVOU-240 13 1C4807

BE3-59-3A1N1 252-PVAU-120 13 1C4821

BE3-59-3B1N1 252-PVAU-240 13 1C4824

BE3-59-3D1N1 252-PVAU-480 13 1C4825

BE3-59-4A1N1 252-PVPU-120 14 1C4837

BE3-59-4C1N1 252-PVPU-220 14 1C4839

BE3-59T-1A1N1 252-PVHU-120 10 1C4854

BE3-59T-1B1N1 252-PVHU-240 10 1C4857

BE3-59T-1D1N1 252-PVHU-480 10 1C4858

BE3-59T-3A1N1 252-PVCU-120 10 1C4864

BE3-59T-3B1N1 252-PVCU-240 10 1C4867

BE3-59T-4C1N2 252-PVSU-220 10 1C4877

BE3-74S-7F5A1 252-PBTU-ECBX 33 1C4956

BE3-81O-1A4N1 252-PHOU-120 17 1C4886

BE3-81O-1B4N1 252-PHOU-240 17 1C4888

BE3-81O-1D4N1 252-PHOU-480 17 1C4890

BE3-81O-U-1A4N1 253-PHDU-120 17 1C4891

BE3-81O-U-1B4N1 253-PHDU-240 17 1C4893

BE3-81O-U-1D4N1 253-PHDU-480 17 1C4895

BE3-81U-1A4N1 252-PHUU-120 17 1C4881

BE3-81U-1B4N1 252-PHUU-240 17 1C4883

BE3-81U-1D4N1 252-PHUU-480 17 1C4885


6

250 Series DIN-rail and Wall Mounted Relays AC Current with Adjustable Time Delay

250 series ac current protectors provide continuous surveillance of the monitored circuit. When the current moves outside the set point limit for longer than the time delay, the relay operates. The protector can be used to monitor over and under-current conditions, load detection and for mon-itoring electric heating systems. An illuminated LED indicates when the relay is energized. For three-phase systems, the sequence of connection is not important.

Operation

AC current protectors provide continuous surveillance of the monitored circuit. These products offer user adjustable trip point (set point) and time delay settings. The set point adjustment range is between 40% and 120% of the nominal current. Input currents can be via current transformers or direct up to 10A. An internal differential setting of 1% reduces nuisance tripping if the measured signal is noisy or unstable. When the measured current moves outside the set point limit the relay will operate, giving an alarm or initiation signal. An adjustable time delay is provided to prevent the relay from tripping for a predetermined period to prevent nuisance tripping. The units draw their operating power from a separate auxiliary supply input. Single-phase and three-phase products are available. Three-phase products monitor the current level for each phase and are not phase sequence sensitive. Combined units offer under and over-current trips in one compact unit. Single function units are also available.

Over-Current Models

When the monitored current exceeds the set point, the relay will energize and the red LED will illuminate to indicate the trip condition. The relay will automatically reset once the monitored current falls below the set point minus the differential. When reset, the LED will extinguish and the relay de-energizes.

Under-Current Models

When the monitored current falls below the set point, the relay will de-energies and the red LED will extinguish to indicate the trip condition. The relay will automatically reset once the monitored current rises above the set point plus the differential. When reset, the LED will illuminate and the relay energizes.

Options

250 series protector relays offer various customized options to suit individ-ual requirements. Please consult Byram Laboratories.

• Adjustment ranges – different adjustment ranges are possible for the set point and differential controls.

• Relay operation – standard models are fail safe, but the relays can be customized to energize or de-energize on trip.

Features

Single and three-phase options Adjustable set point Adjustable time delay Internal differential LED trip indication Double-pole relay contacts Automatic reset

Benefits

Ideal for any electrical load detection Over and under-current monitoring Suitable for electric heating systems Ensures load current is within generator ca-pacity Detects broken drive belts on machinery Nuisance tripping avoidance Customized options

Applications

Marine panels Switchgear Distribution systems Generator sets Control panels Process control Motor protection Transformers Overload protection


7

Phase Amps Aux Power Hertz ANSI no. Model Ordering #

AC Current Under 40-120% 1P 5 Amps 120 VAC 60 37 252-PAUU-120 1C3846

AC Current Under 40-120% 1P 5 Amps 240 VAC 60 37 252-PAUU-240 1C4765

AC Current Under 40-120% 1P 5 Amps 12 VDC 60 37 252-PAUU-DC12 1C4766



AC Current Over 40-120% 1P 5 Amps 120 VAC 60 51 252-PAOU-120 1C1697

AC Current Over 40-120% 1P 5 Amps 240 VAC 60 51 252-PAOU-240 1C4775

AC Current Over 40-120% 1P 5 Amps 12 VDC 60 51 252-PAOU-DC12 1C4776



AC Current Under and over-current 1P 5 Amps 120 VAC 60 37/51 253-PADU-120 1C3847

AC Current Under and over-current 1P 5 Amps 240 VAC 60 37/51 253-PADU-240 1C4779

AC Current Under and over-current 1P 5 Amps 12 VDC 60 37/51 253-PADU-DC12 1C4780



AC Current Under 40-120% 3P 3/4W 5 Amps 120 VAC 60 37 253-PAVU-120 1C3848

AC Current Under 40-120% 3P 3/4W 5 Amps 240 VAC 60 37 253-PAVU-240 1C4783

AC Current Under 40-120% 3P 3/4W 5 Amps 12 VDC 60 37 253-PAVU-DC12 1C4784



AC Current Over 40-120% 3P 3/4W 5 Amps 120 VAC 60 37 253-PAPU-120 1C0783

AC Current Over 40-120% 3P 3/4W 5 Amps 240 VAC 60 37 253-PAPU-240 1C4787

AC Current Over 40-120% 3P 3/4W 5 Amps 12 VDC 60 37 253-PAPU-DC12 1C4788



Protection

* Additional options available, please call Byram Laboratories for further assistance.

Nominal input current 1A or 5A from CT secondary.0.2A to 10A availa-ble on request

Nominal frequency 50, 60 or 400Hz

Input current burden 0.5VA per phase

Overload 2 x rating continuously, 10 x rating for 3 seconds

Set point repeatability >0.5% of full span

Differential (hysteresis) Pre-set at 1%. Values 1% to 10% available on request

Trip level adjustment 40 to 120%. Customized adjustment available

Time delay adjustable 0 to 10 seconds

AC auxiliary supply voltage

100V, 110V, 120V, 208V, 220V, 240V, 480V, ±20%

DC auxiliary supply voltage

12V, 24V, 48V, 110V or 125V, ±20%. Including ripple

Auxiliary voltage burden 4VA (max)

Output relay 2-pole change over

Relay contact rating AC: 240V 5A, non inductive DC: 24V 5A resistive

Relay mechanical life 0.2 million operations at rated loads

Relay reset Automatic

Operating temperature 0°C to +60°C (0°C to +40°C for UL models)

Storage temperature –20°C to +70°C

Temperature co-efficient 0.05% per °C

Interference immunity Electrical stress surge withstand and non-function to ANSI/IEEE C37 90a

Enclosure style DIN-rail with wall mounting facility

Material Flame retardant polycarbonate/ABS

Enclosure integrity IP50

Model 252 dimensions 55mm (2.2”) wide x 70mm (2.8”) high x 112mm (4.4”) deep


Weight Model 252: 0.4Kg approx. Model 253: 0.6Kg approx.

Specifications


8 4

Model 253

75mm (2.9”) 112.5mm (4.4”)

RELEASE CLIP

60mm (2.4”)

2 FIXING HOLE 'A' TO SUIT M4


35m

m

(1.3

7”)

70m

m (

2.8”

)

(2.3

6”)

60m

m

50m

m (

1.96

”)

252-PAU 252-PAO

253-PAD 253-PAP 253-PAV

Dimensions Model 252

70m

m (

2.8”

)

55mm (2.2”)

(1.3

7”)

35m

m

RELEASE CLIP

112mm (4.4”) 55mm (2.2”) 2 HOLES

O 4.1”

12mm

(0.5”)

15.5mm

(0.6”)

35mm (1.37”)

17.5mm (0.68”)

35m

m (

1.37

”)


9

250 Series DIN-rail and Wall Mounted Relays AC Voltage with Adjustable Time Delay

The ac voltage protectors provide continuous surveillance of the monitored circuit. When the measured voltage moves outside the set point limit, the relay will operate after the selected time delay, giving an alarm or initia-tion signal. Relays normally energize on overvolts and de-energize on un-dervolts. An illuminated LED indicates when the relay is energized.

Operation AC voltage protectors offer user adjustable trip point (set point) and time delay settings. The set point adjustment range is 25%, operating between 75% and 100% of the nominal supply for under-voltage units and between 100% and 125% for the over-voltage units. The time delay setting adjust-ment range is typically 0 to 10 seconds, although longer delays are availa-ble. As soon as the monitored signal moves outside of the set point limit, the time delay is activated, after which a trip will occur. The time delay prevents the relay from tripping for a predetermined period to prevent nui-sance tripping. The products also feature an internal differential (hysteresis) setting of 1% to reduce nuisance tripping if the measured signal is noisy or unstable. The units draw their operating power from the measuring inputs, although a separate auxiliary supply input option is available on some models. Sin-gle-phase and three-phase products are available. Three-phase products monitor the voltage level for each phase and are not phase sequence sen-sitive.

Over-Voltage Models

When the monitored voltage exceeds the set point, the time delay is start-ed. When the time has elapsed, the relay will energize and the red LED will illuminate to indicate the trip condition. The relay will automatically reset once the monitored voltage falls below the set point minus the differential. When reset, the LED will extinguish and the relay de-energizes. The time delay is not active when resetting.

Under-Voltage Models

When the monitored voltage falls below the set point, the time delay is started. When the time has elapsed, the relay will de-energize and the red LED will extinguish to indicate the trip condition. The relay will automati-cally reset once the monitored voltage rises above the set point plus the differential. When reset, the LED will illuminate and the relay energizes. The time delay is not active when resetting.

Options

250 series protector relays offer various customized options to suit individ-ual requirements. Please consult Byram Laboratories. • Adjustment ranges – different adjustment ranges are possible for the set point and differential controls. • Separate auxiliary supply – sometimes required to maintain a time delay. • Differential – internally fixed value between 1% and 15%. • Relay operation – standard models are fail safe, but the relays can be customized to energize or de-energize on trip.

Features

Adjustable set point Adjustable time delay Internal differential LED trip indication Double-pole relay contacts Automatic reset

Benefits

Over and under-voltage monitoring Close voltage control Start standby generators Operation of mains failure units Switching standby supplies Protecting computer supplies Monitors genset AVR and excitation systems Nuisance tripping avoidance Customized options

Applications Switchgear Distribution systems Generator sets Control panels Process control Motor protection Transformers Overload protection


10

Phase Volts Hertz ANSI no. Model Ordering#

AC Voltage Under 75-100% 1P 120V L-N 120 60 27 252-PVZU-120 1C4849





AC Voltage Over 100-125% 1P 120V L-N 120 60 59 252-PVHU-120 1C4854





AC Voltage Under 75-100% 3P 3W 120V L-L 120 60 27 252-PVJU-120 1C4859





AC Voltage Over 100-125% 3P 3W 120V L-L 120 60 59 252-PVCU-120 1C4864





AC Voltage Under 75-100% 3P 4W 120V L-N 120 60 27 252-PVXU-120 1C4869






AC Voltage Over 100-125% 3P 4W 120V L-N 120 60 59 252-PVSU-120 1C4875






Protection



11

Nominal voltage 100V, 110V, 208V, 240V, 277V, 400V, 415V, 440V or 480V

System frequency 45/65Hz or 360/440Hz

Voltage burden 0.3VA

Overload 1.2 x rating continuously, 1.5 x rating for 10 x seconds


Differential (hysteresis) Pre-set at 1%. Values 1% to 10% to order

Trip level adjustment Under-voltage: 75 to 100% Over-voltage: 100 to 125% of nominal input voltage

Time delay Adjustable up to 10 seconds

AC auxiliary supply voltage 100V, 110V, 120V, 208V, 220V, 240V, 480V, ±20%

DC auxiliary supply voltage 12V, 24V, 48V, 110V or 125V, ±20%. Including ripple













Dimensions 55mm (2.2") wide x 70mm (2.8") high x 112mm (4.4") deep

Weight 0.4Kg approx.

Specification – AC Voltage with Adjustable Time Delay

Note: The neutral connec on is always used on four‐wire systems.

252-PVZ 252-PVH

252-PVX 252-PVS 252-PVC 252-PVJ

70m

m (

2.8”

)

55mm (2.2”)

(1.3

7”)

35m

m

RELEASE CLIP

112mm (4.4”) 55mm (2.2”) 2 HOLES

O 4.1”

12mm

(0.5”)

15.5mm

(0.6”)

35mm (1.37”)

17.5mm (0.68”)

35m

m (

1.37

”)



12 5

250 Series DIN-rail and Wall Mounted Relays

AC Voltage with Adjustable Differential

The ac voltage protectors provide continuous surveillance of the monitored circuit. When the measured voltage moves outside the set point limit for longer than the time delay, the relay will operate giving an alarm or initia-tion signal. The protector can be used for under and over-voltage detection, start standby generators, operation of mains failure units and switching standby supplies. An illuminated LED indicates when the relay is energized. The three-phase, three or four-wire models, protect each phase independently.

Description

AC voltage protectors offer user adjustable trip point (set point) and differ-ential (hysteresis) settings. The set point adjustment range is 25%, oper-ating between 75% and 100% of the nominal supply for under-voltage units and between 100% and 125% for the over-voltage units. The differ-ential setting adjustment range is 1% to 15% and it can be used to reduce nuisance tripping if the measured signal is noisy or unstable. When the measured voltage moves outside the set point limit, the relay will operate, giving an alarm or initiation signal. As soon as the monitored signal moves outside of the set point limit, a trip will occur. A fixed time delay is available as a factory option, preventing the relay from tripping for a predetermined period to prevent nuisance tripping. The units draw their operating power from the measuring inputs, although a separate auxiliary supply input option is available on some models. Three-phase products monitor the voltage level for each phase and are not phase sequence sensitive. Combined units offer under and over-voltage trips in one compact unit. Single function units are also avail-able.

Over-Voltage Models

When the monitored voltage exceeds the set point, the relay will energize and the red LED will illuminate to indicate the trip condition. The relay will automatically reset once the monitored voltage falls below the set point minus the differential. When reset, the LED will extinguish and the relay de-energizes.

Under-Voltage Models

When the monitored voltage falls below the set point, the relay will de-energize and the red LED will extinguish to indicate the trip condition. The relay will automatically reset once the monitored voltage rises above the set point plus the differential. When reset, the LED will illuminate and the relay energizes.

Options

250 series protector relays offer various customized options to suit individ-ual requirements. Please consult Byram Laboratories. • Time delay – internal fixed time delay before a trip occurs. • Separate auxiliary supply – sometimes required to maintain a time delay or energized relay when the monitored signal fails. • Adjustment ranges – different adjustment ranges are possible for the set point and differential controls. • Relay operation – standard models are fail safe, but the relays can be customized to energize or de-energize on trip.

Features

Single and three-phase models Adjustable set point Adjustable differential Internal time delay LED trip indication Double-pole relay contacts Automatic reset

Benefits

Over and under-voltage monitoring Start standby generators Operation of mains failure units Switching standby supplies Monitors genset AVR and excitation systems Nuisance tripping avoidance Customized options

Applications



13

Protection Phase Volts L-N Hertz ANSI no. Model Ordering #

AC Voltage Under 75-100% 1P 120V L-N 120 60 27 252-PVUU-120 1C4798






AC Voltage Over 100-125% 1P 120V L-N 120 60 59 252-PVOU-120 1C4804






AC Voltage Under and Over 1P 120V L-N 120 60 27/59 253-PVBU-120 1C4810






AC Voltage Under 75-100% 3P 3W 120V L-L 120 60 27 252-PVKU-120 1C4816





AC Voltage Over 100-125% 3P 3W 120V L-L 120 60 59 252-PVAU-120 1C4821





AC Voltage Under and Over 3P 3W 120V L-L 120 60 27/59 253-PVMU-120 1C4826





* Continued on the next page (pg. 14)



14

Nominal input current 1A or 5A from CT secondary.0.2A to 10A available on request









DC auxiliary supply voltage 12V, 24V, 48V, 110V or 125V, ±20%.Including ripple




Phase Volts L-N Hertz ANSI no. Model Ordering #

AC Voltage Under 75-100% 3P 4W 120V L-N 120 60 27 252-PVVU-120 1C4831






AC Voltage Over 100-125% 3P 4W 120V L-N 120 60 59 252-PVPU-120 1C4837






AC Voltage Under and Over 3P 4W 120V L-N 120 60 27/59 253-PVEU-120 1C4843






Protection



Operating temperature 0°C to +60°C (0°C to +40°C for UL mod-els)










Specification



15

Contact Set 2

3-phase Input Aux supply When required L N

Under Relay Contact Set 1

Over Relay Contact Set 1



Input Input

Input

252-PVU, 252-PVO, 252-PVV, 252-PVP, 252-PVK, 252-PVA

253-PVB 253-PVM 253-PVM

Note: The neutral connection is always used on four-wire systems.


Single-phase Input

Model 253

Contact Set 1

70m

m (

2.8”

)

55mm (2.2”)

(1.3

7”)

35m

m

RELEASE CLIP

112mm (4.4”) 55mm (2.2”) 2 HOLES

O 4.1”

12mm

(0.5”)

15.5mm

(0.6”)

35mm (1.37”)

17.5mm (0.68”)

35m

m (

1.37

”)

75mm (2.9”) 112.5mm (4.4”)

RELEASE CLIP

60mm (2.4”)



35m

m

(1.3

7”)

70m

m (

2.8”

)

(2.3

6”)

60m

m

50m

m (

1.96

”)


16 5


Frequency

Crompton frequency protectors give continuous surveillance of the moni-tored circuit. When the frequency moves outside the set point limit for longer than the time delay, the relay will operate giving an alarm control or tripping signal. An illuminated LED indicates when the relay is ener-gized. Since speed is proportional to the frequency, this protector can be used to monitor over and under-speed and to protect mains supplies, computer supplies and standby supplies for industrial, hospital or marine use.

Operation

Frequency protectors offer user adjustable frequency trip point (set point) and differential (hysteresis) settings. The set point adjustment range is centered around the nominal 50Hz, 60Hz or 400Hz system frequency. The differential setting adjustment can be used to reduce nuisance tripping if the measured signal is noisy or unstable. When the measured frequency moves outside the set point limit, the relay will operate, giving an alarm or initiation signal. As soon as the monitored frequency moves outside of the set point limit, a trip will occur. The units draw their operating power from the measuring inputs. Combined units offer under and over frequen-cy trips in one compact unit. Single function units are also available.

Over-Frequency Models

When the monitored frequency exceeds the set point, the relay will ener-gize and the red LED will illuminate to indicate the trip condition. The re-lay will automatically reset once the monitored frequency falls below the set point minus the differential. When reset, the LED will extinguish and the relay de-energizes.

Under-Frequency Models

When the monitored frequency falls below the set point, the relay will de-energize and the red LED will extinguish to indicate the trip condition. The relay will automatically reset once the monitored frequency rises above the set point plus the differential. When reset, the LED will illuminate and the relay energizes.

Options


• Adjustment ranges – different adjustment ranges are possible for the set point and differential controls. • Time delay – internal fixed time delay before a trip occurs. • Relay operation – standard models are fail safe, but the relays can be customized to energize or de-energize on trip.

Features

Adjustable set point Adjustable differential LED trip indication Double-pole relay contacts Automatic reset

Benefits

Over and under-frequency monitoring Over and under-speed monitoring Start standby generators Operation of mains failure units Switching standby supplies Protection of control gear Nuisance tripping avoidance Customized options

Applications



17

Phase Volts Hertz ANSI no. Model Ordering #

Frequency Under 1P 120 60 81U 252-PHUU-120 1C4881





Frequency Over 1P 120 60 81O 252-PHOU-120 1C4886





Frequency Under and Over 1P 120 60 81O/U 253-PHDU-120 1C4891





Protection


Nominal voltage 100V, 110V, 120V, 208V, 220V, 230V, 240V, 277V, 380V, 400V, 415V, 440V or 480V, ±20%

System frequency 40/60Hz, 50/70Hz or 360/440Hz

Voltage burden 3VA

Overloads 1.2 x rating continuously, 1.5 x rating for 10 x seconds


Differential (hysteresis) 40/60Hz, 50/70Hz: Adjustable 0.1 to 3.0Hz 360/440Hz: Adjustable 10 to 30Hz












Model 252 dimensions 55mm (2.2") wide x 70mm (2.8") high x 112mm (4.4") deep



Specification – Frequency

253-PHD

252-PHU 252-PHO


18

250 Series DIN-rail and Wall Mounted Relays Combined Under/Over-Voltage and Frequency The 250 series combined voltage and frequency protectors provide contin-uous surveillance of the monitored circuit. When the voltage or frequency moves outside the set point limit for longer than the time delay, the re-spective relay will operate giving an alarm, control or tripping signal. An illuminated LED indicates when the relay is energized. This protector can be used to protect against over and under-speed and over and under-voltage.

Operation Combined voltage and frequency protectors provide the most popular relay functions in one convenient package. The products offer user adjustable trip point (set point) for voltage and frequency, plus adjustable time delay settings. The set point adjustment range is 25%, operating between 75% and 100% of the nominal supply for under-voltage and between 100% and 125% for over-voltage. The frequency set point adjustment range is cen-tered around the nominal 50Hz, 60Hz or 400Hz system frequency. The time delay setting adjustment range is typically 0 to 10 seconds, although longer delays are available. As soon as the monitored signal moves outside of the set point limit, the time delay is activated, after which a trip will occur. The time delay pre-vents the relay from tripping for a predetermined period to prevent nui-sance tripping. The products also feature an internal differential (hysteresis) setting of 1% to reduce nuisance tripping if the measured sig-nal is noisy or unstable. The product is available for single-phase systems only and draws its operating power from the measuring input.

Over-Voltage and Frequency

When the monitored value exceeds the set point and the time delay has elapsed, the relay will energize and the red LED will illuminate to indicate the trip condition.

Under-Voltage and Frequency

The relay will de-energize after the time delay has elapsed and the red LED will extinguish to indicate the trip condition.

Options


• Adjustment ranges – different adjustment ranges are possible for the set point and time delay controls. • Differential – internally fixed value between 1% and 15%. • Relay operation – standard models are fail safe, but the relays can be customized to energize or de-energize on trip.

Features

Adjustable set point Adjustable time delay Internal differential LED trip indication Double-pole relay contacts Automatic reset

Benefits

Over and under-voltage monitoring Over and under-speed monitoring Start standby generators Operation of mains failure units Switching standby supplies Monitors genset AVR and excitation systems Nuisance tripping avoidance Customized options

Applications Switchgear Distribution systems Generator sets Control panels Process control Motor protection Transformers Overload protection

Phase Volts ANSI no. Model Ordering #

Voltage and Frequency Over and Under (50-70 Hz) 1P 120V 120 27/59, 81O/U 256-PHVU-120 1C4896





Protection Hertz

60

60

60

60

60



19

Nominal input current 1A or 5A from CT secondary.0.2A to 10A available on request









DC auxiliary supply voltage 12V, 24V, 48V, 110V or 125V, ±20%.Including ripple
















Specification – Combined Under/Over and Frequency

256-PHV


150mm (5.9”)

35m

m

135mm (5.3”)

50m

m (

1.96

”)

60m

m (

2.36

”)



112.5mm (4.4”)

RELEASE CLIP

70m

m (

2.8”

)


20


Phase Sequence and Phase Failure

The Crompton phase sequence and phase failure protector relays are de-signed to monitor the correct phase rotation or sequence of three-phase, three or four-wire supply systems and provide protection against incorrect phase sequence, loss of one phase and under-voltage.

Operation

Rotating machines are particularly vulnerable to incorrect phase se-quence. Three-phase motors can rotate in the wrong direction, potentially leading to physical damage or the risk of injury to personnel, yet voltage and current readings may appear normal. If one phase is lost because of a blown fuse, electric motors can continue to operate (single-phasing) which can result in severe electrical or mechanical damage. For permanent in-stallations, this relay should be used to monitor the incoming supply, pro-tecting all equipment against incorrect connection at initial installation or after maintenance work. Rotating machines that cannot tolerate reverse rotation or pose significant risk to personnel under this condition should be individually protected with this relay. The possibility of incorrect supply connection is much more likely in portable equipment or marine applica-tions. The phase sequence and phase failure protectors continuously monitor the three-phase supply. With the correct phase sequence applied, the front panel LED will illuminate and the output relay will be energized. An incor-rect sequence or missing phase will de-energize the relay and the LED will be extinguished. If the supply drops below 85% of its nominal voltage, this condition will also cause a trip. Note: If one phase is lost due to a blown fuse, some loads can re-generate the missing voltage. This relay can be used as a phase failure relay providing the regenerated voltage in the open phase is less than 70% of the nominal supply voltage. If there is the possibility of a higher regenerated voltage, the phase balance relay 252-PSF should be used.

Features

Three-phase, three or four-wire LED trip indication Double-pole relay contacts Automatic reset

Benefits Monitoring of correct phase rotation Protection against incorrect phase sequence and loss of phase Under-voltage monitoring Prevents reverse rotation of motor driven equipment Ensures correct engine rotation Protects portable electrical equipment

Applications


Protection Phase Volts ANSI no. Model Ordering#

Phase sequence, under-voltage 85% 3P 3/4W 120 L-L 47 252-PVRU-120 1C4901

Hertz

60

Phase sequence, under-voltage 85% 3P 3/4W 208 L-L 60 47 252-PVRU-208 1C4970






21

Nominal voltage 110V, 120V, 208V, 220V, 230V, 240V, 277V, 380V, 400V, 415V, 440V or 480V


Voltage burden 3VA approx.

Overload 1.2 x rating continuously, 1.5 x rating for 10 x seconds to symmetric

Trip level adjustment Pre-set at 85% of nominal















Note: No neutral connec on is required.

Specification – Phase Sequence and Phase Failure 252-PVR

70m

m (

2.8”

)

55mm (2.2”)

(1.3

7”)

35m

m

RELEASE CLIP

112mm (4.4”) 55mm (2.2”) 2 HOLES

O 4.1”

12mm

(0.5”)

15.5mm

(0.6”)

35mm (1.37”)

17.5mm (0.68”)

35m

m (

1.37

”)



22

250 Series DIN-rail and Wall Mounted Relays Phase Balance

The 250 series phase balance protector module provides continuous surveil-lance of a three-phase, three- or four-wire system and monitors the correct phase rotation or sequence of three-phase supply systems. The module pro-tects against phase loss, reversal or sequence, phase unbalance and system under-voltage.

Operation

Rotating machines are particularly vulnerable to incorrect phase sequence. Three phase motors can rotate in the wrong direction, potentially leading to physical damage or the risk of injury to personnel, yet voltage and current readings may appear normal. If one phase is lost because of a blown fuse, electric motors can continue to operate (single-phasing) which can result in severe electrical or mechanical damage. This relay has the added advantage that it will detect the phantom or regenerated phase that can be caused by a single-phase failure on some equipment or when running motors at low load levels. An unbalanced supply voltage can lead to temperature rises in motors. An un-balanced voltage as little as 10% can increase operating temperature to 150% of normal. For permanent installations, this relay should be used to monitor the incoming supply, protecting all equipment against incorrect connection at initial installation or after maintenance work. Rotating machines that cannot tolerate reverse rotation or pose significant risk to personnel under this condi-tion should be individually protected with this relay. The possibility of incorrect supply connection is much more likely in portable equipment or marine appli-cations. The protector continuously monitors the three-phase supply. With the correct phase sequence applied and all three voltages balanced within the required limits, the front panel LED will illuminate and the output relay will be ener-gized. An incorrect sequence, missing phase, out of balance or under-voltage condition will de-energize the relay and the LED will be extinguished. The set point control allows adjustment of the voltage matching between 5% and15%. The time delay function operates only for the voltage unbalance con-dition. The delay can be used to prevent nuisance tripping due to short term unbalance situations. Incorrect phase rotation, a missing phase or an under-voltage condition trip the relay immediately.

Features

Three-phase, three or four-wire Adjustable set point Adjustable time delay Internal differential LED trip indication Double-pole relay contacts Automatic reset

Benefits

Monitoring of correct phase rotation Protects against phantom or regenerated phase voltage Protection against phase loss, reversal or sequence Under-voltage and unbalanced voltage monitoring Prevents reverse rotation of motor driven equipment Ensures correct engine rotation Protects portable electrical equipment Nuisance tripping avoidance

Applications Marine panels Switchgear Distribution systems Generator sets Control panels Process control Motor protection

Protection Phase Volts ANSI no. Model Ordering #

Phase Loss & Unbalance, 120V L-L 3P 3/4W 120 47 252-PSFU-120 1C4902





Phase Loss, Unbal, Undervoltage, 120V L-L 3P 3/4W 120 47/27 252-PSGU-120 1C4907


Phase Loss, Unbal, Undervoltage,240V L-L 3P 3/4W 240 47/27 252-PSGU-240 1C4909



Hertz

60

60

60

60

60

60

60

60

60

60



23


System frequency 50 or 60Hz


Overload 1.2 x rating continuously, 1.5 x rating for 10 x seconds


Under-voltage set point Pre-set at 15% of nominal voltage. Other values 10 to 30% to order (model 252-PSG only)

Trip level adjustment Phase unbalance adjustable 5 to 15%

Time delay 10 seconds as standard. Up to 30 seconds available
















Note: Neutral connec on not required.

Specification – Phase Balance 252-PSF 252-PSG

70m

m (

2.8”

)

55mm (2.2”)

(1.3

7”)

35m

m

RELEASE CLIP

112mm (4.4”) 55mm (2.2”) 2 HOLES

O 4.1”

12mm

(0.5”)

15.5mm

(0.6”)

35mm (1.37”)

17.5mm (0.68”)

35m

m (

1.37

”)


24


Synchro-Check (paralleling)

The synchro-check relay can be used to assist in the semi-automatic par-alleling of two ac power systems. The volt-free relay contacts change state when the voltage level, phase relationship and frequency are within the selected synchronizing limits. Connecting two electrical systems that are not closely matched can cause expensive damage and disturbance to the electrical system. Using this relay will ensure that damage will not occur.

Operation

As part of a manual control system, the operator will make adjustments to the generator voltage (excitation) and frequency (engine speed) using a synchroscope or lamps and will then attempt to manually close the break-er. This synchro check protector will qualify that the two systems are closely matched before permitting the breaker to close. As part of an au-tomatic synchronizing arrangement, this relay can be used as an inde-pendent backup or checking device to ensure the two systems are suitably matched before the breaker can close.

Model 256-PLL

The relay continuously monitors the voltage, phase displacement and fre-quency of two supplies. A single set point adjustment permits selection of suitable matching and a red LED illuminates when the relay is energized, indicating that the two supplies are well matched and it is safe to close the breaker.

Model 256-PLD

This version operates in the same way as model 256-PLL but includes an additional dead bus detection function. If there is a requirement for a con-tinuous supply or emergency power, then the generator can be connected without synchronizing, thus ensuring continuity of supply. The absence of bus voltage will cause the relay to energize.

Features

Single-phase or three-phase, three or four-wire Live and dead bus versions Adjustable set point LED trip indication Volt free relay contacts

Benefits

Monitors voltage phase displacement and frequency of 2 supplies Frequency matching Voltage matching Phase angle matching Synchronization of Gen-Bus and Bus-Bus Monitors auto synchronizing systems Assists in manual synchronization

Applications Marine panels Switchgear Distribution systems Generator sets Co-generation Control panels

Phase Volts ANSI no. Model Ordering #

Phase Angle and Voltage 2 live Bus 1P or 3P 3/4W 120 25 256-PLLU-120 1C4932





Phase Angle and Voltage Dead Bus 1P or 3P 3/4W 120 25 256-PLDU-120 1C4937





Protection Hertz

60

60

60

60

60

60

60

60

60

60



25

Nominal voltage 100V, 110V, 120V, 208V, 220V, 230V, 240V, 277V, 380V, 400V, 415V, 440V or 480V

System frequency 45, 50, 55, 60 or 65Hz

Burden Bus: 2VA Generator: 4VA

Overload –25 to +30% of the nominal voltage


Differential (hysteresis) Pre-set at 1%. Values 1 to 10% available on request

Trip level 10 to 30% of the nominal voltage 6° to 20° electrical adjustment

Output relay 1 pair NO (normally open), 1 pair NC (normally closed) 2 pair NO and 2 pair NC available on request

Relay contact rating AC: 240V 5A non inductive DC: 24V 5A resistive












Specification – Synchro-Check (paralleling)

256-PLL 256-PLD

150mm (5.9”)

35m

m

(1.3

7”)

112.5mm (4.4”)

70m

m (

2.8”

)

RELEASE CLIP

50m

m (

1.96

”)

60m

m (

2.36

”)



135mm (5.3”)


26


Thermistor Trip

Many motors, transformers and generators are fitted with positive temper-ature co-efficient thermistor temperature sensors. The addition of a ther-mistor trip relay will provide full protection against sustained overload, sin-gle phasing, locked rotor, blocked ventilation and high ambient tempera-ture. Thermistor trip relays continuously monitor the working temperature inside electrical equipment. When the temperature exceeds a safe limit, the relay can be used to shut down equipment until it regains a safe oper-ating temperature.

Operation

Thermistors are simple low cost temperature sensors. The thermistor trip protector operates by de-energizing a relay when the thermistors detect a critical temperature condition. An illuminated green LED indicates when the temperature is within normal working limits. Any number of thermistors may be used in series connection providing the resistance at normal work-ing temperature is less than 1500 ohms. There are no user adjustments on this relay. Model 252-PMT will automatically reset when temperature returns to nor-mal. For model 252-PMM, fitting a link between terminals R1 and R2 will latch the product in its tripped state when an over-temperature condition is detected. The relay can be reset by pressing the front panel reset switch, opening the R1–R2 link, or interrupting the auxiliary supply.

Features

Trip range 2500 to 3500 ohms Reset range 1500 to 2300 ohms LED trip indication Automatic or manual reset options Double-pole relay contacts

Benefits

High temperature protection Sustained overload protection Single phasing protection Locked rotor protection Blocked ventilation protection

Applications

Switchgear Distribution systems Generator sets Control panels Process control Motor protection Transformers Overload protection


Over-temperature manual reset PTC thermistors 120 49 252-PMMU-120 1C4942

Over-temperature automatic reset PTC thermistors 120 49 252-PMTU-120 1C4943

Hertz

60

60



27

Nominal voltage 110V, 120V, 220V, 230V or 240V ac ±20%

Input Positive temperature coefficient thermistors (series connected 1500Ω at normal temperature)

System frequency 50/60Hz


Overload 1.2 x rating continuously

Trip level 2500 to 3500Ω reset 1500 to 2300Ω





Relay contact rating AC: 240V 5A non inductive DC: 24V, 5A resistive


Relay reset Model 252-PMT: Automatic Model 252-PMM: Manual










Specification – Thermistor Trip 252-PMT

252-PMM


70m

m (

2.8”

)

55mm (2.2”)

(1.3

7”)

35m

m

RELEASE CLIP

112mm (4.4”) 55mm (2.2”) 2 HOLES

O 4.1”

12mm

(0.5”)

15.5mm

(0.6”)

35mm (1.37”)

17.5mm (0.68”)

35m

m (

1.37

”)


28


Hot Spot 3 Temperature Relay

The Hot Spot 3 relay accepts up to three inputs from resistance tempera-ture detectors (RTD) and provides up to three user adjustable trip points which can be used to initiate alarms, cooling systems or shutdown. The relay is ideally suited for the protection of electric motor windings, trans-formers, generator windings and bearing temperature. The analog output can be used for remote monitoring of high temperatures.

Operation

RTD temperature sensors are often fitted inside electric motors to detect hot spots in the windings or the bearings. RTD sensors are popular be-cause they offer a good accuracy for a reasonable price. The same sensors can be used inside transformers, generator sets, gas turbines or as part of a process control system. Hot spots can be caused by many conditions such as overloads, over-voltage, unbalanced supply, worn bearings, inef-fective cooling, poor ventilation, shorted turns, insulation breakdown, sin-gle phasing etc.. The Hot Spot 3 protector continuously monitors the three RTD temperature sensors and offers up to three user adjustable set points and relay con-tacts. These can be used to raise alarms, switch on cooling systems or shut down the affected equipment. The highest temperature is indicated with a yellow LED and can be accurately measured or remotely displayed using the 0/1mA analog output signal. The temperature is compared with the user adjustable set points. When the measured temperature exceeds the set point, the relay will de-energize and a red LED will illuminate to indicate the trip condition. When the temperature drops below the set point, the relay will reset to the ener-gized condition and the LED will extinguish. The range consists of three product models which offers one, two or three adjustable set points.

Features

Up to three RTD inputs 1mA analog output Three adjustable set points Internal differential LED trip indication Automatic reset Three single-pole relay contacts

Benefits

Temperature monitoring Unbalanced supply protection Sustained overload protection Single-phasing protection Blocked ventilation protection Protection against ineffective cooling Protection of bearing temperature

Applications

Switchgear Distribution systems Generator sets Control panels Process control Motor monitoring Transformers Overload protection

Protection Phase Volts Hertz ANSI no. Model Ordering #

3 Trip Points 3 RTD inputs 120 10 Ohm Copper 60 49 256-PRAU-R1BX 1C4944

3 Trip Points 3 RTD inputs 120 100 Ohm Platinum 60 49 256-PRAU-R2BX 1C4945

3 Trip Points 3 RTD inputs 120 120 Ohm Nickel 60 49 256-PRAU-R3BX 1C4946

2 Trip Points 3 RTD inputs 120 10 Ohm Copper 60 49 256-PRBU-R1BX 1C4947

2 Trip Points 3 RTD inputs 120 100 Ohm Platinum 60 49 256-PRBU-R2BX 1C4948

2 Trip Points 3 RTD inputs 120 120 Ohm Nickel 60 49 256-PRBU-R3BX 1C4949

1 Trip Points 3 RTD inputs 120 10 Ohm Copper 60 49 256-PRCU-R1BX 1C4950

1 Trip Points 3 RTD inputs 120 100 Ohm Platinum 60 49 256-PRCU-R2BX 1C4951

1 Trip Points 3 RTD inputs 120 120 Ohm Nickel 60 49 256-PRCU-R3BX 1C4952



29

Input Up to 3 resistance temperature detectors (RTD). Ei-ther 10Ω copper or 100Ω platinum minimum span 100°C

Nominal voltage AC: 110V, 120V, 220V, 230V, or 240V ±20% DC: Consult factory



Set point repeatability 0.5% of full span

Differential (hysteresis) Pre-set at 2% of range




Analog output 1mA into 0/4kΩ load














Specification – Hot Spot 3 Temperature Relay

256-PRA 256-PRB 256-PRC

150mm (5.9”)

35m

m

(1.3

7”)

50m

m (

1.96

”)

60m

m (

2.36

”)



135mm (5.3”)

112.5mm (4.4”)

70m

m (

2.8”

)

RELEASE CLIP


30


Hot Spot 6 Temperature Relay

The Hot Spot 6 protector is a temperature trip relay accepting up to six inputs from resistance temperature detector (RTD) elements and provides one user adjustable trip point which can be used to initiate alarms, cooling or shutdown when the monitored temperature exceeds the set limit. The relay is ideally suited for the protection of electric motor windings, trans-formers, generator windings and bearing temperature.

Operation

RTD temperature sensors are often fitted inside electric motors to detect hot spots in the windings or bearings. RTD sensors are popular because they offer a good accuracy for a reasonable price. The same sensors can be used inside transformers, generator sets, gas turbines or as part of a process control system. Hot spots can be caused by many conditions such as overloads, over-voltage, unbalanced supply, worn bearings, ineffective cooling, poor ventilation, shorted turns, insulation breakdown, single phas-ing etc. The Hot Spot 6 protector continuously monitors the six RTD temperature sensors and offers a user adjustable set point and relay contacts. This can be used to raise alarms, switch on cooling systems or shut down the af-fected equipment. The temperature is compared with the user adjustable set point. There is a red alarm indicator associated with each temperature sensor. When the measured temperature exceeds the set point on one or more inputs the red alarm indicators associated with temperature sensor(s) exceeding the set point temperature will illuminate to indicate which sensors are above the set point. When any input is above the set point, the relay will de-energize, the overall red "Alarm" will illuminate and the green "Safe" will extinguish. When the temperature on all inputs drops below the set point the relay will reset to the energized condition, the overall red "Alarm" will extinguish and the green "Safe" will illuminate.

Features

Up to 6 RTD inputs Adjustable set point Internal differential LED trip indication Automatic reset Single-pole relay contacts

Benefits

Unbalanced supply protection Sustained overload protection Single-phasing protection Blocked ventilation protection Protection against ineffective cooling Protection of bearing temperature

Applications

Switchgear Distribution systems Generator sets Control panels Process control Motor monitoring Transformers Overload protection

Protection Relay Volts ANSI no. Model Ordering #

1 Set Points 6 RTD inputs 120 10 49 256-PCCU-R1BX 1C4953



Ohm Copper

Ohm Platinum

Ohm Nickel

Hertz

60

60

60



31

Input Up to 6 resistance temperature detectors (RTD). Either 10Ω copper or 100Ω platinum minimum span 100°C

Nominal voltage AC: 110V, 120V, 220V, 230V, or 240V ±20% DC: Consult factory


Voltage burden 6VA maximum


Set point repeatability Within 1°C

Differential (hysteresis) 4°C of nominal

Trip level adjustment 100°C (e.g.: 50 to 150°C, 100 to 200°C etc)

Time delay Typically 250ms

















Specification – Hot Spot 6 Temperature Relay

When used for less than 6 RTD inputs the unused terminals 1, 2 and 3 must be linked together.

256-PCC

150mm (5.9”)

35m

m

(1.3

7”)

50m

m (

1.96

”)

60m

m (

2.36

”)



135mm (5.3”)

112.5mm (4.4”)

70m

m (

2.8”

)

RELEASE CLIP


32


DC Millivolts/Thermocouple

The 250 series millivolt protectors provide continuous surveillance of high dc currents when used with current shunts, or can be used to monitor tem-peratures in conjunction with thermocouples. The protector incorporates a user adjustable trip and time delay which can be set to initiate an alarm when the input exceeds the desired level.

Operation

When used in conjunction with current shunts the millivolt protector can be used to monitor battery charging currents, current drain or under/over-current. Monitoring of under/over-temperature and detection of hotspots can be achieved in applications using thermocouples. All industry standard shunts and all popular thermocouples are supported. The millivolt protector relays offer user adjustable trip point (set point) and time delay settings. The time delay setting adjustment range is typically 0 to 10 seconds, although longer delays are available. As soon as the moni-tored signal moves outside of the set point limit, the time delay is activat-ed, after which a trip will occur. The time delay prevents the relay from tripping for a predetermined period to prevent nuisance tripping. These products also feature an internal differential (hysteresis) setting of 1% to reduce nuisance tripping if the measured signal is noisy or unstable. These units require an auxiliary power supply.

Features High and low trip models Adjustable set point Adjustable time delay Internal differential LED trip indication Automatic reset Double-pole relay contacts Supports all industry standard shunts and popular thermocouples

Benefits

Under/over-temperature monitoring Under/over-current monitoring Monitoring of battery charging currents and current drain Detection of hotspots Nuisance tripping avoidance Customized options

Applications


Over High Trip Models

When the monitored signal exceeds the set point, the time delay is start-ed. When the time has elapsed, the relay will energize and the red LED will illuminate to indicate the trip condition. The relay will automatically reset once the monitored signal falls below the set point minus the differential. When reset, the LED will extinguish and the relay de-energizes. The time delay is not active when resetting.

Under Low Trip Models

When the monitored signal falls below the set point, the time delay is started. When the time has elapsed, the relay will de-energize and the red LED will extinguish to indicate the trip condition. The relay will automati-cally reset once the monitored signal rises above the set point plus the differential. When reset, the LED will illuminate and the relay energizes. The time delay is not active when resetting.

Operation

250 series protector relays offer various customized options to suit individ-ual requirements. Please consult Byram Laboratories. • Adjustment ranges – different adjustment ranges are possible for the set point and time delay controls. • Differential – internally fixed value between 1% and 15%. • Relay operation – standard models are failsafe, but the relays can be customized to energize or de-energize on trip. • Cold junction compensation available on request.


33


Shunts 120V AC AUX STD High Trip, 50mV (40-120%) DC millivolt 120 74 252-PBTU-ECBX 1C4956

Shunts 120V AC AUX STD Low Trip, 50mV (0-80%) DC millivolt 120 74 252-PBSU-ECBX 1C4957

Shunts 120V AC AUX STD High Trip, 100mV (40-120%) DC millivolt 120 74 252-PBTU-GBBX 1C4958

Shunts 120V AC AUX STD Low Trip, 100mV (0-80%) DC millivolt 120 74 252-PBSU-GBBX 1C4959

(10Mv Min, 50mV Max) High Trip Thermocouple 120 49 252-PTOU-TJBX 1C4960

(10Mv Min, 50mV Max) High Trip Thermocouple 120 49 252-PTOU-TKBX 1C4961

(10Mv Min, 50mV Max) High Trip Thermocouple 120 49 252-PTOU-TRBX 1C4962

(10Mv Min, 50mV Max) High Trip Thermocouple 120 49 252-PTOU-TSBX 1C4963

(10Mv Min, 50mV Max) High Trip Thermocouple 120 49 252-PTOU-TTBX 1C4964

(10Mv Min, 50mV Max) Low Trip Thermocouple 120 49 252-PTUU-TJBX 1C4965

(10Mv Min, 50mV Max) Low Trip Thermocouple 120 49 252-PTUU-TKBX 1C4966

(10Mv Min, 50mV Max) Low Trip Thermocouple 120 49 252-PTUU-TRBX 1C4967

(10Mv Min, 50mV Max) Low Trip Thermocouple 120 49 252-PTUU-TSBX 1C4968

(10Mv Min, 50mV Max) Low Trip Thermocouple 120 49 252-PTUU-TTBX 1C4969

Hertz

60

60

60

60

60

60

60

60

60

60

60

60

60

60

DC input 10mV, 50mV, 60mV, 75mV, 100mV, 150mV,

Input impedance 50KΩ

Source impedance 100Ω maximum

Thermocouple Types J, K, R, S, T, 10 to 50mV

Thermocouple TBP Thermocouple break protection upscale drive as standard

Thermocouple CJC Cold junction compensation available on request

Thermocouple overload 10 x rating continuously

Nominal frequency 50/60Hz


Voltage overload 1.2 x rating continuously 1.5 x rating for 10 seconds


Differential (hysteresis) Pre-set at 1% Values 1 to 15%available on request

Trip level adjustment Low trip: 0 to 80% High trip: 40 to 120%



DC auxiliary supply voltage 12V, 24V, 48V, 110V, or 125V, ±20%. Including ripple















Specification – DC Millivolts/Thermocouple


252-PBT 252-PBS 252-PTU 252-PTO


34


DC Transducer Trip

DC transducer protectors provide continuous surveillance of the dc process voltage or current signal. When the standard process signals move outside the set point limit the relay will operate. Combining the protection relay with a measuring transducer such as the Crompton Paladin measuring transducers range can form specialized control products whenever self-contained relays are not available.

Operation

The dc transducer protector relay offers user adjustable trip point (set point) and time delay settings. The time delay setting adjustment range is typically 0 to 10 seconds, although longer delays are available. As soon as the monitored signal moves outside of the set point limit the time delay is activated, after which a trip will occur. The time delay prevents the relay from tripping for a predetermined period to prevent nuisance tripping. The products also feature an internal differential (hysteresis) setting of 1% to reduce nuisance tripping if the measured signal is noisy or unstable. These units require an auxiliary power supply.

Features

High and low trip models Adjustable set point Adjustable time delay Internal differential LED trip indication Automatic reset Double-pole relay contacts

Benefits

Accepts standard process voltage or current signals Monitors forward/reverse Watts, VAr and VA Monitors under/over Watts, VAr and VA Power factor monitoring and control Nuisance tripping avoidance Customized options

Applications


Over High Trip Models

When the monitored signal exceeds the set point, the time delay is started. When the time has elapsed, the relay will energize and the red LED will illuminate to indicate the trip condition. The relay will automatically reset once the monitored signal falls below the set point minus the differential. When reset, the LED will extinguish and the relay de-energizes. The time delay is not active when resetting.

Under Low Trip Models

When the monitored signal falls below the set point, the time delay is started. When the time has elapsed, the relay will de-energize and the red LED will extinguish to indicate the trip condition. The relay will automatical-ly reset once the monitored signal rises above the set point plus the differ-ential. When reset, the LED will illuminate and the relay energizes. The time delay is not active when resetting.

Operation

250 series protector relays offer various customized options to suit individu-al requirements. Please consult Byram Laboratories. • Adjustment ranges – different adjustment ranges are possible for the set point and time delay controls. • Differential – internally fixed value between 1% and 15%. • Relay operation – standard models are failsafe, but the relays can be customized to energize or de-energize on trip.

Protection Phase Volts Hertz ANSI no. Model Ordering #

Low trip 0 to 80% DC transducer 120 60 74 252-PBA-120 Call: 1-800-766-1212

High trip 40 to 120% DC transducer 120 60 74 252-PBB-120 Call: 1-800-766-1212

High and low trip DC transducer 120 60 74 253-PBV-120 Call: 1-800-766-1212



35

Nominal input current dc 0-1mA, 0-5mA, 0-10mA, 0-20mA, 4-20mA volt drop 1V

Nominal input voltage dc 1V to 50V, input resistance 10kΩ/V


Overload 1.2 x rating continuously, 1.5 x rating for 10 seconds


Differential (hysteresis) Pre-set at 1%. Values 1 to 15% available on request

Trip level adjustment Low trip: 0 to 80% High trip: 40 to 120%



DC auxiliary supply voltage 12V, 24V, 48V, 110V, or 125V, ±20%. Including ripple
















Specification – DC Transducer Trip 252-PBB 252-PBA

Contact Set 1 Contact Set 2

Relay

Monitored Value

Supply

253-PBV

Monitored Value





Supply


70m

m (

2.8”

)

55mm (2.2”)

(1.3

7”)

35m

m

RELEASE CLIP

112mm (4.4”) 55mm (2.2”) 2 HOLES

O 4.1”

12mm

(0.5”)

15.5mm

(0.6”)

35mm (1.37”)

17.5mm (0.68”)

35m

m (

1.37

”)


36


Reverse Power (current)

The reverse power protector provides continuous surveillance for ac gener-ators operating in parallel or for boosting mains supplies. On site adjust-ment of the trip point and time delay ensures accurate protection against ‘motoring’ in the event of engine failure and prevents tripping from surges during synchronizing.

Operation

Reverse power protectors provide continuous surveillance of ac generators against motoring. Reverse power relays are used to detect the failure of the prime mover (engine) when active energy (Watts) flows into the gen-erator causing rotation – the set will operate like an electric motor which can cause significant mechanical damage. This relay offers an adjustable reverse power set point between 2% and 20% of nominal power and time delay adjustment range of 0 to 20 seconds. As soon as the reverse power level increases above the set point limit, the time delay is activated, after which a trip will occur. The time delay pre-vents the relay from tripping for a predetermined period to prevent nui-sance tripping. The products also feature an internal differential (hysteresis) setting of 1% to reduce nuisance tripping if the measured sig-nal is noisy or unstable. These units are powered from the measuring sup-ply. The protector relay estimates the power level in the system by measuring current and power factor, but does not actually measure the system volt-age. When the reverse power level exceeds the set point, the time delay is started. When the time has elapsed, the relay will energize and the red LED will illuminate to indicate the trip condition. The relay will automatical-ly re-set once the power level falls below the set point minus the differen-tial. The LED will extinguish and the relay de-energizes. The time delay is not active when resetting. The reverse power level will trip as expected at the calibrated point for unity power factor. However, the system power factor does affect the trip point calibration. The relay becomes more sensitive at lagging power factors, as almost all systems exhibit inductance. At leading power factors, this relay is less sensitive.

Setting Up

The ‘% set’ potentiometer trimmer on the front label is calibrated as a per-centage of the input current rating e.g. of 5A and not of the forward kW. Adjust the ‘% set’ trimmer to the required tripping value, 7.5% to 10% is normal. Setting accuracy can be checked by reversing the current lead connections and, with forward power, measuring the trip point value on a suitable ammeter (reconnect leads on completion). Adjust the ‘Delay’ to the required time delay, 10 seconds is normally adequate.

Options


• Adjustment ranges – different adjustment ranges are possible for the set point and time delay controls. • Relay operation – standard models are fail safe, but the relays can be customized to energize or de-energize on trip.

Features

Three-phase, three or four-wire Adjustable set point Adjustable time delay Internal differential LED trip indication Double-pole relay contacts Automatic reset

Benefits

Current and power factor measurement Protects generators against ‘motoring’ Detects reverse power under fault conditions Customized options Nuisance tripping avoidance

Applications



37


Reverse Power 2-20% 1P or 3P 4W 120 32 256-PASU-120 1C4912





Reverse Power 2-20% 3P 3W 120 32 256-PATU-120 1C4917





Reverse Power 2-20% 1P or 3P 4W Push to test 120 32 256-PAQU-120 1C4922





Reverse Power 2-20% 3P 3W Push to test 120 32 256-PARU-120 1C4927





Hertz

60

60

60

60

60

60

60

60

60

60

60

60

60

60

60

60

60

60

60

60













Nominal current 5A or 2, 3, 4, 6, 8 and 10A

System frequency 50, 60 or 400Hz

Burden Voltage: 3VA maximum Current: 2VA maximum

Current overload 2 x rating continuously, 10 x rating for 3 seconds

Voltage overload 1.2 x rating continuously, 1.5 x rating for 10 seconds

Monitoring range capacitive Power factor: 0.5 inductive/unity/0.2 Current: 20 to 100% of nominal input


Differential (hysteresis) Pre-set at 1%

Trip level adjustment 2 to 20%. Customized adjustment avail-able



Relay contact rating AC: 240V 5A, non inductive

Specification – Reverse Power (Current)



38

Note: Only one CT connec on is required, from the same phase as the voltage connec on to terminal 2.


150mm (5.9”)

35m

m

(1.3

7”)

135mm (5.3”)

50m

m (

1.96

”)

60m

m (

2.36

”)



112.5mm (4.4”)

RELEASE CLIP

70m

m (

2.8”

)


39

250 Series Protectors CSA and UL Marking

Type Signal Input *

Auxiliary Input *

Approvals

CSA LR52592

UL Listed E113067

UL Recog-nized E113067

American Bureau of Shipping

252-PA? AC Current, 5 & 10 Amp

24V DC max or 300V AC max

252-PA? All others Any DC or 300V AC max

252-PA? All others AC >300V

252-PB? Transducer trip, 50V DC, 20mA DC


252-PBS 150mV max 125V DC max or 240V AC max

252-PBT 150mV max 125V DC max or 240V AC max

252-PB? Any 240-300V AC

252-PB? Any AC > 300V

252-PD? 300V AC max

252-PD? AC > 300V

252-PH? AC up to 300V max

252-PH? > 300V AC < 600V AC

252-PM? AC up to 240V max


252-PM? AC up to 240V max

125V DC max AC > 300V

252-PS? AC up to 300V max

252-PS? AC > 300V

252-PT? Any 300V AC Max

252-PT? Any AC > 300V

252-PV? AC up to 300V max


252-PV? AC > 300V AC > 300V

Type Signal Input *

Auxiliary Input *

Approvals

CSA LR52592

UL Listed E113067

UL Recog-nized E113067


256-PA? Up to 300V AC max

300V AC max

256-PA? > 300V AC < 600V AC

AC > 300V AC < 600V max

256-PC? 240V AC max 125V DC max 300V AC max

256-PC? 240V AC max 125V DC max AC > 300V

256-PL? Up to 300V AC max

256-PL? > 300V AC < 600V AC

256-PR? Up to 240V AC max

125V DC max 300V AC max

256-PR? Up to 240V AC max

125V DC max AC > 300V AC < 600V

Type Signal Input *

Auxiliary Input *

Approvals

CSA LR52592

UL Listed E113067

UL Recognized E113067


253-PA? AC Current, 5 & 10 Amp


253-PA? All others Any DC or 300V AC max

253-PA? All others AC >300V

253-PB? Transducer trip, 50V DC, 20mA DC


253-PB? Any 240-300V AC

253-PB? Any AC > 300V

253-PH? AC up to 300V max

253-PH? > 300V AC < 600V AC

253-PV? AC up to 300V max


253-PV? AC > 300V AC < 600V

AC > 300V AC < 600V

253- P Protectors

256-P Protectors

? = any letter

* Rated voltage as stated on the product label.

Examples of Marking:

Canadian Standards Association

UL Listed (USA only)

Recognized – USA and Canada


or


40

Byram Laboratories, Inc.

1 Columbia Road Branchburg, NJ 08876, USA

Phone: (800) 766-1212 Fax: (908) 252-0822 Email: [email protected]

www.byramlabs.com

Documents

Reliable System Protection Protector Trip Relays - · PDF fileProtector Trip Relays ... including over and under-voltage, current, ... An internal differential setting of 1% reduces