Digi pro Bro 110314 - MCCB,Flexible Wires,Distribution ... · PDF fileLarsen & Toubro Larsen & Toubro is a technology-driven company that infuses engineering with imagination. The

Numerical Relays For Protection, Monitoring & Control

Larsen & Toubro

Larsen & Toubro is a technology-driven company that

infuses engineering with imagination. The Company

offers a wide range of advanced solutions in the field

of Engineering, Construction, Electrical & Automation,

Machinery and Information Technology.

L&T Switchgear, a part of the Electrical & Automation

business, is India's largest manufacturer of low

voltage switchgear, with the scale, sophistication and

range to meet global benchmarks. With over five

decades of experience in this field, the Company

today enjoys a leadership position in the Indian market

with a growing international presence.

It offers a complete range of products including

powergear, controlgear, industrial automation,

building electricals & automation, reactive power

management, energy meters, and protective relays.

These products conform to Indian and International

Standards.

L&T limited offers a wide range of Microprocessor

based State-of-the-art digital protective relays

suitable for LV, MV and HV power distribution

systems. These relays are manufactured at L&T’s

Mysore works equipped with modern infrastructure

and employing latest manufacturing and testing

equipments. L&T’s range also include relays for

special applications manufactured by Microelettrica

Scientifica, Italy. The applications include Feeder

Management, Load Sharing, Load Shedding,

Synchronising, Grid Islanding etc.

L&T also manufactures a range of electronic single phase energy meters, three phase energy meters and trivector meters at the Mysore works.

Switchgear Factory, Ahmednagar

Switchgear Factory, Mumbai

Switchgear Factory, Vadodara

ANSI Device Function 1

Time - Current Characteristics 2

Over Current & Earth Fault Relays -

Current Sensing Relays -

Power Factor Control Relays

MC31AnX, MC61AnX 3

MC12A, SC14S 5

Reverse Power Relay - MRP11 7

Voltage Relay - MV12 7

- etaCON Series 9

RPM14 11

Motor Protection Relays - MM30-743, MM30-W74, 13

MCOMP, MPR300 15

Generator Protection Relays - MG30, MG30I, MD32G 17

Transformer Protection Relay - MD32TM 19

Vector Surge Protection Relay - UM30A 21

Voltage and Frequency Relay - MC3V, UFD34 21

Schematic - Relay Application 23

Pages

Contents

Correlation between ANSI/IEEE device function number and relays

Under impedance relay / Distance relay

Auto synchronising

Synchro-check relay

AC under voltage relay

Power directional relay

Under current or under power relay

Field control (loss of field) relay

Reverse phase or phase balance current relay

Phase-sequence or single-phasing voltage relay

Machine or transformer thermal relay

Instantaneous over current (or rate-of-rise) relay

Voltage restrained over current relay

Breaker - failure

Instanteneous earth fault over current relay

AC time over current relay

Ground fault time over current relay

AC over voltage relay

Overexcitation relay V/Hz

Voltage balance relay

Ground detector (insulation to ground failure of machine or other apparatus)

Machine stator ground fault detector relay

AC directional over current relay

Directional ground fault over current relay

DC over current relay

Phase angle measuring or out of-step protection relay

Frequency relay

Lock-out relay

Differential protective relay

Ground fault differential protective relay

Regulating device to adjust a quantity

Vector surge protection relay

Rate of change of frequency

MV12

MRP11

M

MC12A

MC61A

MC12A

MC61A

MC12A

MC61A

MC31A

MC12A

MC61A

MC31A

MV12

--

--

--

--

--

--

–

–

–

--

--

SC14S

--

–

–

–

PR300

MG30 / MG30-I

SPM21

SCM21

UM30-A / MC1V / MC3V

UFD34

MG30 / MW33 / MG30-I

MM30

MW33

MG30 / MG30-I

IM30T

MM30

UM30-A, MC3V

IM30T

MG30 / MG30-I

MM30 / MM30-W

MC20 / MC30

IM30-T / IM30-AP

FMR

MG30 / MG30-I

MG30 / MG30-I

MC20 / MC30 / FMR / IM30T / IM30AP

IM30 AP / IM30-T

MC20 / MC30

FMR / IM30-T

IM30-AP / IM30-T

MC20 / MC30

FMR / IM30-T

--

IM30-AP / IM30-T

MC20 / MC30

FMR

--

--

UFD34, MW33

UM30-A / MG30 / MG30-I

UM30-A

MG30

MG30

UBO / CR

FMR

FMR

–

IM30-GOS

UM30-ASV / MG30

UFD34 / MC1V / MC3V / MW33

--

MD32G

MD32T / MD32TM

MD32G, MD32T

--

UM30-A

UFD34

Function Name

L&T Relays

MS Relays

Device No.

21

25

27

32

37

40

46

47

49

50

51V, 50V

50BF

50N

51

51N-(51G)

59

59/81

60

64

64S

67

67N-(67G)

76

78

81

86

87

87N-(87G)

90

df/dt

ANSI/IEEE

1

Product Design Standards

Reference standards IEC 60255, IEC 61000, IS3231, IS8686Dielectric test : IS 3231 / IEC 60255-5 Impulse test : IS 8686 / IEC 60255- 5 HF disturbance test : IS 8686 / IEC 60255-22-1 Electrostatic discharge test : IEC 61000-4-2Electrical fast transient : IEC 61000-4-4Radiated electro magnetic field test : IEC 61000-4-3Surge immunity : IEC 61000-4-5Ring wave test : IEC 61000-4-12Voltage dips & interruption test : IEC 61000-4-11Power frequency magnetic test : IEC 61000-4-8

:

Time - Current Characteristics

Time - Current Characteristics (At TMS = 1)

A : Normal Inverse 3.0 secB : Normal Inverse 1.3 secC : Very InverseD : Extreme Inverse

For Trip time at TMS other than 1Trip time = (Trip time at TMS = 1) x TMS or 50 msec whichever is more.

Multiple of set current (Is)

Tri

p T

ime

(S

ec

.)

A

B

C

D

1,000

100

10

1

01

1 10 20

2

Salient Features • Microcontroller based Numerical relay for Feeder, AC machines,

and transformer protection in LV, MV and HV Systems

Site selectable IEC Curves - 4 nos. of IDMT curves + 3 Definite time characteristics

Universal Aux. supply: 24 - 220 VAC/ DC

Large LCD Display and 4 LED's for fault indication

Built in self supervision and relay test facility

Freely programmable output contacts – 4NO or 2NO + 2NC type with additional relay for IRF

•

•

•

• Last 15 trip records with Date and Time stamping

•

•

Over Current and Earth Fault Relays

• Three phase over current & earth fault relays

Auxiliary supply

CT Rating

Device code

Design

Burden on CT

Burden on PT

Operating temp

Weight

Burden on auxiliary supply

Output contact

Construction

Dim W x H x D in mm

Panel cutout

Output contacts

3 Phase O/C + E/F

0C

51, 51N

Numerical relay

Site selectable trip time char.

Display of currents, trip count

Self supervision feature

� 0.25 VA on CT/Phase

Not applicable00 to 60 C

< 2kg

� 10 VA

1 N/O Contact for self supervision

Drawout

121 x 158 x 224

113 x 142

24 to 240 V AC / DC

1 A or 5 A

(site selectable)

4 NO or 2 NO + 2 NC

3 Phase O/C + E/F + Highset

0 0C

supervision

24 to 240 V AC / DC

51, 51N, 50, 50N

Numerical relay


Highset can be disabled

Display of currents, trip count

Self supervision feature

� 0.25 VA on CT/Phase

Not applicable

0 to 60 C

< 2kg

� 10 VA

1 N/O Contact for self

Drawout

121 x 158 x 224

113 x 142

1 A or 5 A

(site selectable)

4 NO or 2 NO + 2 NC

MC61AnXModel MC31AnX

Ordering Information

Other features

Settings

Functions available

Description

3

Lowset O/C - Is

Highset O/C - Ihs

OsLowset E/F -

Highset E/F - Ohs

O/C Is = 20-200% step 1%

E/F Os = 5-80% step 1%

HS O/C = (0.2 to 40) x in step of -

0.1 in or disable

HS E/F = (0.1 to 20) x on step of -

0.1 on or disable

Time characteristics available -

NI, VI, EI, definite time

TMS : 0.01 - 1.6 step of 0.01

O/C Is = 20-200% step 1%

E/F Os = 5-80% step 1%

Time characteristics available -

NI, VI, EI, definite time

TMS 0.01 - 1.6 in step of 0.01

Lowset O/C - Is- OsLowset E/F

MC31AnX

MC61AnX

MC61AnX

MC31AnX

Wiring Diagrams

R Y B R Y B1

2

4

13

5

6

15

16

7

8

3 3

1

2

4

13

5

6

15

16

7

8

22

25

26

21

L/+

N/-

MICRO CONTROLLER

PROTECTION

F51

F51N

R Y B E

PROGERROR

R1

R2

R3

R4

R5

9

10

11

12

17

18

27

28

29

30˜

R Y B R Y B1

2

4

13

5

6

15

16

7

8

3 3

1

2

4

13

5

6

15

16

7

8

22

25

26

21

L/+

N/-

MICRO CONTROLLER

PROTECTION

F51

F51N

F50

F50N

R Y B E

R1

R2

R3

R4

R5

9

10

11

12

17

18

27

28

29

30

PROG.ERROR

4

• Single phase over current / earth fault relay

Salient Features

• Easy setting through front panel DIP switches

• Indication for power ON and trip status

• Test feature - helps in better maintenance • Compact, light weight helps in reducing panel size &

thickness

Current Sensing Relays

Model SC14SDescription

Device code

Design

Burden on CT

Burden on PT

Operating temp

Weight


Output contacts

Construction

Dim W x H x D in mm

Panel cutout

Type 1

Type 2

CT Rating

1 Ph O/C or E/F

0 0C

or

50/51 or 50N/51N

Microcontroller based

Lowset O/C - Is

Highset O/C - Ihs

Lowset E/F - Os

Highset E/F - Is

O/C Is = 50-200% Step 10% or

E/F Is = 10-40% Step 2% or

E/F Is = 20-80% Step 4%

HS O/C = (2-16) xls step 2 Is

HS E/F = (2-16) xls step 2 Is

Time characteristics available-

Nl, VI, EI, Definite time

3 ranges of def time (1, 10,100)

TMS : 0.1 - 1.6 Step 0.1


Highset can be disabled

0.25 VA on CT

Not applicable

0 - 60 C

< 1.5kg

5.5 VA

2 C/O Contacts (S/R)

Drawout

71 x 158 x 224

62 x 142

20-110 V AC / DC or

88-264 V AC / DC

1 A or 5 A

10-40% or 20-80% 50-200%

Site selectable

Instantaneous current relay

0 0C

87N/64R

Static

Is = 10-40% step 5%

or 20-80% step 10%


Instantaneous (25ms) or

time delayed 100ms / 200ms

Self powered

Relay testing possible by ext. 24 V -

Supply

Flag indication / LED indication

6 VA

Not applicable

0 to 60 C

< 1.5kg

Not applicable


Drawout

71 x 158 x 224

62 x 142

Not applicable

1 A or 5 A

10-40% or 20-80%

MC12A

Auxiliary supply

Range setting

Other features

Settings

Functions available


5

MC12A

SC14S

1

2 +VE/PH.

-VE/NR1

COM

COM

SETTING RANGE (Is)

Aux. Supply

μP. ControlCkt.

F50/50NF51/51N

3

10

11

12

1AIn MC12A

(10-40)% In(20-80)% In(50-200)% In

5A

AUX SUPPLY24 - 110V AC/DC95 - 240V AC/DC

MC12A

11

10

9

7+

8

12

SC14S

Test (24V)Voltage

DC-DC

Convrt.

Test

ControlCkt.

R

2

1

3

5

6

4

In1A5A

CT OPERATED RELAYNO AUXILIARY SUPPLY REQUIRED

SETTING RANGE (Is)(10-40)% IN(20-80)% IN

˜

Wiring Diagrams

6

Salient Features

• Easy setting through front panel DIP switches

• LED indication for power ON and trip status

• Test feature - helps in better maintenance • Compact, light weight helps in reducing panel size &

thickness

Reverse Power Relay, Under Voltage or Over Voltage Relay

Model MRP11 MV12Description

Device code

Design

Burden on PT

Burden on CT

Operating temp

Weight


Output contacts

Construction

Dim W x H x D in mm

Panel cutout

Type 1

Type 2

CT Rating

PT Rating


Lowset U/V - Vs

Lowset O/V - Vs

U/V Vs = 95-20% step 5%

O/V Vs = 105-180% step 5%


Inverse time, definite time

TMS : 0.1 - 1.6 Step 0.1

Site selectable U/V or O/V


0.075 VA on PT

0 to 60 C

< 1.5kg

8 VA


Drawout

71 x 158 x 224

62 x 142

20-110 V AC / DC

88-264 V AC / DC

Not applicable

110 V / 240 V / 415 V (site selectable)

1 Ph U/V or O/V

27 or 59

< 0.25 VA

0 0C


Reverse power level

PT input Vn 110 V, 415 V AC

CT input In 1 A / 5 A

Pick up level 1% - 15%

Min. setting 0.5%

TMS 0 to 1.5 step 0.1

Definite time characteristics

LED indication

Test feature

< 0.25 VA

< 0.05 VA

0 to 60 C

< 1.5kg

< 8 VA

1 N/O + 1 C/O

Drawout

71 x 158 x 224

62 x 142

20-110 V AC / DC

88-264 V AC / DC

1 A 5 A

Upto 380 V AC

Reverse power

32

0 0C

or

Other features

Settings

Functions available

Auxiliary supply


7

MRP11

R Y

14

5

7

8

6

11

μP.

Control

Ckt.

F32

R1

Vn110 V AC 1 A415 V AC 5 A

In AUX SUPPLY24–110 V AC/DC95–240 V AC/DC

MRP11

12

2 + VE / PH.

– VE / N

Aux. Supply3

9

10

B

MV12

5

4

6

8

9

7

R1μP.Control

Ckt.F27F59

1

2

3

11

12

MV12

+VE/PH.

Aux. Supply

-VE/N4

Wiring Diagrams

8

• Intelligent Power factor controllers with Automatic set-up

Salient Features

•

•

• The last two contacts are programmable as alarm and / or fan control except for etaCON 3

• Capacitor over-current and panel over-heating protection

• Use in co-generation systems - 4 Quadarant operation

• Auto / Manual mode

• Measurement Sensitivity - 2.5%

4 Quadrant / 2 Quadrant operation

• Automatic recognition of current flow direction

Online display of PF, Voltage, Current, kVAr, capacitor overload and Panel temperature

Power Factor Control Monitoring Relays

etaCON L3; etaCON L5; etaCON L7Model

3, 5, 7

96 x 96 x 71 mm

92 x 92 mm

415 V AC

5 A secondary

3; 5; 7 steps

etaCON L8; etaCON L12

8, 12

144 x 144 x 69.7 mm

138.5 x 138.5 mm

415 V AC

5 A secondary

8; 12 steps


Digital Microprocessor based

3 Digit LED

5 Amp

415 VAC ± 15%

50/ 60 Hz

Instantaneous PF, V, I, kVAr, Capacitor Over load

Panel temperature, Average weekly PF,

Maximum Voltage, current, capacitor overload, panel temperature value

Target PF adjustment: 0.8 inductive to 0.8 capacitive

Reconnection time of same capacitor: 5 - 240 secs

Switching time sensitivity: 5 - 600 secs

Less than 10 VA

Less than 0.8 VA

No.of steps

Design

Display

Current Input

Voltage Input

Rated Frequency

Power consumption

Burden on CT

Dimensions W x H x D in mm

Panel cutout

Voltage Input

CT Input

No.of steps

Setting

AlarmsUnder/ Over compensation; Low/ High Current; Low/ High Voltage; Capacitor Overload due to

harmonic Voltage; Over temperature; No-voltage release

Product etaCON L series APFC relay

eNw

etaCON Series

Inbuilt Controller Set-up feature provides an option of Automatic configuration of etaCON

controller.

Measurement

0 9 6

9

Wiring Diagrams

etaCON L3/L5/L7

Current Voltage

1 2 3 4 5 6 7

1 2 3 4 5 6 7 8

/5A 415V

S1 S2 9 10 C

KM1

FU1 FU2 FU7

FU9 FU10

KM2 KM7

FU8

OS1

CT1

FU11

L1L2 L3

MAINS

K7K2K1

LOAD

etaCON L8/L12

1 2 3 4 5 6 7 8 9 10 11 12

1 2 3 4 5 6 7 8C 9 10 11 12 13 14

Current Voltage

/5A 415V

S1 S2 15 16

OS1

CT1

L3

MAINS

LOAD

L1L2

FU16

FU12

KM12KM2KM1

FU15FU14

K12K2K1

FU13

FU1 FU2

10

• Intelligent power factor controller relay

Salient Features

•

•

•

• On line display of system PF

• Easy setting through - front panel push button

Suitable for non-uniform banks

• LED indication for alarm code, no. of banks selected, PF status-lead / lag / unity

Auto / Manual mode

Measurement sensitivity of 1%

• Automatic C/K correction

• Display of Current, Voltage, kVAr, & Capacitor values

Power Factor Control Monitoring Relays

Model

Device code

Design

Burden on CT

Burden on PT

Operating temp

Weight

Dim W x H x D in mm

Panel cutout

Auxiliary supply

RPM-14

Automatic


Automatic PF control upto

14 stage

Switching time 1-255 sec

in step of 1 sec for same

Bank switching

Auto C/K selection

PF control range 1% to 120% of

rated current

Can accept unequal banks

Display of PF, V, l, kVAr

LED indications for faults

Alarm signal for CT reversal,

under current, under compensation,

over compensation, over voltage,

1 A / 5 A field selectable

0.3 VA

15 VA00 to 60 C

< 2kg

14 N/O

1 N/O contact for alarm

144 x 144 x 100

138 x 138

240 V AC

power factor controller

14 stage

0C

Description

Functions available

Settings

Other features

Output contacts


11

RPM-14

1

2

3

4

5

6

7

8

9

10

11

12

R1

R2

R3

R4

R5

R6

R7

R8

R9

R10

R11

R12

13

14

15

16

17

18

19

20

21

22

23

24

R13

R14

-

++

R

Y

B

N

S2

S1(1A)

S1(5A)

ALA

RM

Ph

240V AC

50 HzN

Bank #1

Bank #14

ToLoad

Wiring Diagrams

12

• Motor protection relay - MM30-743• Motor protection relay with voltage input - MM30-W74

Motor Protection Relay

Salient Features

• Display of various parameters, trip count and trip data

• LEDs for fault indication

• User programmable output relays

• Built in self supervision & self testing feature helps maintenance

• RS485 Port for serial communication with “MSCOM” user friendly software

Description

Design

Burden on CT

Burden on PT

Operating temp

Weight

Burden on auxiliary

Output contacts

Construction

Motor protection

50/51, 51LR, 64, 68,

49, 46, 37, St no, ltr

0 0

Numeric

Trip circuit supervision

Thermal O/L and Pre-alarm

Locked rotor

Current unbalance, phase reversal,

Phase loss

Over current

Earth fault

Repeat and prolonged starts

Restart inhibition

No load running

Blocking function

Auto setting

1 A or 5 A site selectable

(Default 5 Amp)

Selectable motor time constant

(1 - 60 min)

Display of parameters

Built in self supervision

RS485 port

0.2 VA for 5 A, 0.01 VA for 1 A

Not applicable

10 C to 60 C

< 2kg

8.5 VA

4 C/O + 1 C/O for self supervision

Drawout

121 x 158 x 224

113 x 142

20-110 V AC / DC or

88-264 V AC / DC

Model MM30-743Motor protection

50/51, 51LR, 64, 49, 46, 37, St no,

ltr, 55, 68, 81, 47, 12/14, 27/59

0 0

Numeric

Trip circuit supervision

Thermal O/L and Pre-alarm

Locked rotor

Current unbalance, phase reversal,

phase loss

Over current

Earth fault

Repeat and prolonged starts

Restart inhibition

No load running

Blocking function

Under frequency / Over frequency

Under voltage / Over voltage

Running hours

Low PF

Auto setting


(Default 5 Amp)

Selectable motor time constant

(1 - 60 min)



RS485 port

0.2 VA for 5 A, 0.01 VA for 1 A

10 C to 60 C

< 2kg

8.5 VA

4 C/O + 1 C/O for self supervision

Drawout

121 x 158 x 224

113 x 142

20-110 V AC / DC or

88-264 V AC / DC

0.04 VA

MM30-W74

Device code

Functions available

Other features


Auxiliary supply

Dim W x H x D in mm

13

MM30

L/+

N/-

A B C A B C

25

26

27

28

29

41

30

32

39

25

26

27

28

39

29

41

30

32

43

31

42

33

43

31

42

33

44

In=1A

In=5A

PRESA/TAP 31:Ion=5A

PRESA/TAP 33:Ion=1A 12

13 ˜˜

˜

˜̃̃

=

Display

Microp.

MM30

Function

F37F46F49F51F51RF64St.No.>AI.0>Itr

Progr.

Int. Fault

Keyboard

R1

R2

R3

R4

R5

R1

R2

R3

R4

R5

9 Pin Male

(21) (10)

N.O. N.O.

N.C. N.C.

2110

1122

79

8

1820

19

46

5

1517

16

14

3

2

1

34/382324

CS-S+

IEC 255

Wiring Diagrams

14

•

•

Intelligent motor protection & control relay - MCOMP

Economical motor protection relay - MPR 300

Motor Protection Relay

MPR 300 MCOMP Relay

MCOMPModel MPR 300Motor protection

49, 14, 46, 50N, 3, 59, 27, 47,

81H, 81L, 66, 27LV, 47a, 47b

Numeric

Thermal over load

Locked rotor

Current unbalance

Phase loss

Under current

Over voltage

Under voltage

Over frequency

Under frequency

Max. no. of starts

Reacceleration

Phase reversal

Intelligent relay with separate

protection, display and CT

modules

Suitable for 50/ 60 Hz

Can be used with DOL,

RDOL and Star delta starters

Communication options -

Modbus RTU, Modbus TCP IP and Prof bus

Not applicable

Not applicable0

10 to 60 C

< 2kg

< 8 VA

4 C/O

Split protection unit 92 x 123 x 103.95

80 - 240 V AC/DC

Description

Design

Burden on PT

Burden on CT

Operating temp

Weight

Output contacts

Dim W x H x D in mm

Auxiliary supply


Motor protection

49, 51LR, 64, 46, 37

Numeric

Thermal overload

Locked rotor

Earth fault

Single phasing

No load running

upto 88 A

Trip time characteristics

as per

IEC947

Not applicable

Not applicable0

0-60 C

< 0.5kg

< 8 VA

1NO+1NC

Not applicable

240 V AC

Device code

Other features

Functions available

15

Wiring Diagrams

MCOMP Relay

MPR300 Relay

M

1 2 3 4 5 6 7 8

NC NO

MPR300

Aux

Supply

R Y B N

StartN/O

Stop(N/C)

Typical connection diagramfor ‘Direct Starting’ application

Aux. N/O

240V AC Test Bus

L11 - 201

N11 - 201

PH

N

X-25 X-26 TT

415V, 3PH, 4-wire, 50HzRYB

N

Q1

NL

K

111 112

121 122

131 132

6A

6A

6A

F11

F12

F13

K4

2 4 6

1 3 5

R Y B

T4

CBCT

T1P2

P1 S1

S2

XC1-1

XC1-2XC1-3

XC1-4

XC1-5XC1-6

XC1-7

XC1-8XC1-9

XC1-10

T2

P2

P1 S1

S2

S1

S2

R Y B

T5

CB

CTM COMP

CT UNIT

T3P2

P1

M

X-42

X-43

S

SS2

S1

DriveAvailable Run Trip Unused Do

K3

C1

C2

1 2 3 8N B Y R

Ref. Voltage

8181 82 83 84 85 86 87 88 89 90 91 92

C8

L&T MakeMCOMP

C7C4

C3

Digital Output Relay

C6

61 62 63 64 65 66 67

DIGITAL INPUTS

AUX.VOLT

N PH

71 72

RS485

D1

LEDDISPLAY

75

76

77

P

N

E

Unused DI

Sto

p C

om

ma

nd

Sta

rt C

om

ma

nd

Sta

rt C

om

ma

nd

MotorStatus

K3

106 106 10682 83 85 86

K3 K381 84 87

88 89

Ru

n

K4

Trip

43

44

PH

S111

Stop

P.B12

K4

N

A1

A2

21

22

11

12

H2R

H1GR

un

L

ed

Trip

Le

d

HandRSTP.B.

HandStartP.B.

PMR/CO

AlarmPickup

PMR/COMM

TRIP

ESE

ESC

ELECT

Drive

Ava

ilab

le

M COMP

Typical Dol feeder with M COMP

16

• Multifunction generator protection relays• Percentage based generator differential relay

Generator Protection Relays

Salient Features

• Display of various parameters, trip count & trip data on 8 digit alphanumeric display

• Separate LEDs for various fault indication

• Four user programmable output relays

• Built in self supervision & self testing feature help maintenance

• Easy operation by 5 push buttons


Description

Design

Other features

Burden on CT

Burden on PT


Operating temp

Weight

Construction

Dim W x H x D in mm

Panel cutout

Type 1

Type 2

Generator protection

21, 24, 27/59, 32, 37, 40, 46, 49,

0 0C

3 C/O + (1 N/O + N/C) + separate relay

1 C/O for self supervision

50/27,

50V/51V, 51BF, 60FL, 64S, 68, 81

Numeric

Two levels of voltage controlled O/C,

Thermal image with pre-alarm,

Two levels of current unbalance

Two levels of under / over voltage

Two levels of under / over frequency

95% + 100% stator earth fault

Two levels of over excitation

Two levels of under impedance,

Loss of field, under power

PT Fuse failure, breaker failure,

Inadvertent C/B closure etc.




RS485 port, MODBUS protocol

Blocking inputs & Blocking outputs

0.25 VA for 5 Amp CT


0.05 VA (MG30)

8.5 VA

10 to 60 C

< 2kg

Drawout

121 x 158 x 224

113 x 142

20-110 V AC / DC or

88-264 V AC / DC

Generator differential

Wave

Built in

0 0C

87, 50/51, 64S/87N, 68

Numeric

Generator differential

Bias % with dual adjustable -

slope

Over current

Stator E/F

CB failure protection



form capture feature

self supervision, - RS485 port

0.2 VA for 5 A, 0.01 VA for 1 A

Not applicable

8.5 VA

-10 to 60 C

< 2kg

4 C/O, S/R or H/R or time del


Drawout

121 x 158 x 224

113 x 142

20-110 V AC / DC or

88-264 V AC / DC

Model MG30 MD32-GGenerator protection

21, 24, 27/59, 32, 37, 40, 46, 49,

0 0C

3 C/O + (1 N/O + N/C) + separate relay


50/27,

50V/51V, 51BF, 60FL, 64S, 68, 81

Numeric

Two levels of voltage controlled O/C,

Thermal image with pre-alarm,

Two levels of current unbalance



95% stator earth fault

Two levels of over excitation

Two levels of under impedance,

Loss of field, under power

PT Fuse failure, breaker failure,

Inadvertent C/B closure etc.




RS485 port, MODBUS protocol

Blocking inputs & Blocking outputs



0.05 VA (MG30)

8.5 VA

10 to 60 C

< 2kg

Drawout

121 x 158 x 224

113 x 142

20-110 V AC / DC or

88-264 V AC / DC

MG30-I


Device code

Functions available

Output contacts

Auxiliary supply

17

MG30

25

26

27

2839

29

3041

314232

43

33

44

12

13

G

1/5A

1/5A

1/5A

1/5A

1/5A

1/5A

1/5A

Display

Microp.

R1

R2

R3

R4

R5

14

3

2

21

10

1122

79

81820

1946

51517

16

14

3

2

1

Funzioni

1>,Z<,Uo>

R1

R2

R3

R4

R5

12>,T>

Zc<, O>

U,f

W<, Ir>

IC, 60FL

B.I./B.F.

Progr.

Int. Fault

Keyb0ardTastiera

Function

MG30

38(a)

37(b)

To RexRelay

Expansion2324

9 PIN MALE

S–S+

C

(21 – 22)

(10 – 11)

N.O.

N.O.

N.C.

N.C.

CE

MS-SCE 1629-R0 In=1A In=5A Un=100V

MG30

MD32-G

R = Stabilising resistorZ = Protection surge arrester (if required)

L/+

N/-

Display

Microp.

MD32-G

Function

F187GF287GF87N

87G + 87N

A B C

I1A

I1B

I1C

G

25

26

27

28

39

29

30

41

31

4232

43

33

13

12

I2A

I2B

I2C

Z

R Keyboard

Progr.

Int. Fault

=˜˜

˜_

˜̃̃50-60

R5

R4

R3

R2

R1

R3

R2

R1

R4

R5

B3

B2

B1

9 Pin Male

242334/38

1

2

3

14

16

1715

5

6419

2018

8

97

2211

1021

(21)

N.O.

N.C.

(10)

N.O.

N.C.

CS-S+

1/5A

1/5A

1/5A

1/5A

1/5A

1/5A

1/5A

MG30-I

G

In =

In =

13

12

33

43324231

41

30

29

3928

27

26

25

1A

5A MS-SCE1759-R0

Display

Microp.

MG30-I

Funzioni

Function

I>, Z<, Io>

I2>, T>

IC, 60FL

B.I / B.F.

Progr.

Int.fault

KeyboardTastiera

R1

R2

R3

R4

R5

R1

R2

R3

R4

R5

14

3

2

RS485

2110

1122

79

81820

194651517

18

14

3

21

37(b)

38(0)2324

To RexRelay

Expansion

(21 - 22)

N.O. N.C.

(10 - 11)

N.O. N.C.

1/5A

1/5A

1/5A

1/5A

Zc<, >

U, 1

w< Ir>+

cs-s+

Wiring Diagrams

18

• Percentage based transformer differential relay

Transformer Protection Relay

Salient Features

• Display of various parameters, trip count & trip data on 8 digit alphanumeric display

• Separate LEDs for individual fault indication

• Four user programmable output relays

• Built in self supervision & self testing feature help maintenance

• Easy operation by 5 push buttons


Model MD32TM


Description

Device code

Design

Other features

Auxiliary supplyType 1

Type 2

19

Transformer differential

87 RYB

Numeric

Lowset differential

Lowset op time : <=30mS

Highset differential

Highset op time : 6-20mS

Dual slope bias

Highset can be Biased / Unbiased

2nd harmonic restraint setting

5th harmonic restraint setting

Auto correction of CT ratio

Zero sequence compensation

Blocking function

Functions available



RS485 port


Waveform capture feature

0.2 VA for 5 A, 0.01 VA for 1 A0 010 C to 60 C

< 2kg

8.5 VA

5 C/O, S/R or H/R or Time del

Draw out

121 x 158 x 224

113 x 142

20-110 V AC / DC

88-264 V AC / DC

Burden on CT

Operating temp

Weight


Output contacts

Construction

Dim W x H x D in mm

Panel cutout

MD32T / MD32TM

MD32T

R = Stabilising resistorZ = Protection surgearrester (if required)

L/+

N/-

˜

IEC 255 ˜˜

=

˜̃

˜

87T + 87N

A B C

In1

I1A

I1B

I1C

25

26

27

28

39V1

V2Kv =

V1

V2

29

I2A

I2B

I2C

3041

31423243

Z

33

12

13

R 50-60 Keyboard

Progr.

Int. FaultR5

R4

R3

R2

R1F187TF287TF87N

Function

Microp.

DisplayR1

R2

R3

R4

R5

B3

B2

B1

9 Pin Male

CS-S+

242334/38

1

2

3

14

16

1715

5

6419

2018

8

972211

1021

(21)

N.O.

N.O.

N.C.

N.C.

(10)

V1

V2á

1/5A

1/5A

1/5A

1/5A

1/5A

1/5A

1/5A

Wiring Diagrams

20

Salient Features :-

•

•

•

•

•

Display of various parameters, trip count & trip data on LCD screen

Separate LEDs for individual fault indication

Built in self supervision & self testing feature

RS485 port for serial communication with “MSCOM” software

Easy operation by push buttons

• With vector shift protection - UM30A• With df/dt protection - UFD34• With zero sequence Over Voltage / Neutral shift Protection - MC3V

UM30A UFD34 MC3V

Description

Functions available

Output Contacts

Auxiliary supply

Other features

3 Phase V and F relay with vector shift

24, 27d/59d, 47, 59, 59Uo, 78, 81

Numeric

Over fluxing



Zero seq. voltage

Voltage unbalance

Vector shift detection



RS485 Port

3 Ph volt ge and

Frequency relay

81, 27, 59, df/dt, dv/dt

Numeric

Selectable 4 stages

of frequency as under/

over frequency

Selectable 2 stages of

voltage as under/over

voltage

Selectable 2 stages of df/dt

Selectable 1 stages of de/dt

Blocking output and

Blocking Input

Time tagged multiple

event recording

100-125 V



Oscillogarphic recording of

input quantities

RS485 serial communication

port on back panel

Not applicable

0.04 VA

0 0-10 C to 60 C

< 2.5kg

8.5 VA

4 C/O contacts + 1 C/O for self supervision

Drawout

121 x 164 x 224

113 x 142

20-110 V AC/DC or

88-264 V AC/DC

a 3 Ph volt ge and

Frequency relay

27, 59, 47, 59 V 0, 81

Numeric

Two under voltage elements

Two over voltage elements

One under frequency element

One over frequency element

One zero sequence over voltage element

One negative sequence under voltage element

One positive sequence over voltage element

Oscillographic wave form capture

Modbus RTU / IEC870-5-103

Communication Protocols

Display LCD 16 (2 x 8) characters

100-125 V



Modbus RTU / IEC870-5-103

Communication protocols

Front RS232 port for local

Programming

Oscillogarphic recording of input

quantities

RS485 serial communication port on

Back panel

0.1 VA for 1 A, 0.3 VA for 5 A

NA

0 0-10 C to 55 C

< 1.5kg

< 7 VA

4 C/O Contacts + 1 C/O for self supervision

Drawout

83 x 164 x 224

64 x 137

20-110 V AC/DC or

88-264 V AC/DC

a

NA

0.2 VA / phase at UN

010 to 60 C


Drawout

121 x 158 x 224

113 x 142

20-110 V AC / DC or

88-264 V AC / DC

8.5 VA0C

< 2kg

3 C/O + (1 N/O + 1 N/C) + separate relay

Device code

Design

Rating

Burden on CT

Burden on PT

Operating temp

Weight

Burden on auxiliary

Construction

Dim W x H x D in mm

Panel cutout

Burden on aux. supply

Type 1

Type 2

Model


21

Voltage and Frequency Relay

UFD34

L/+

N/-

UFD34

A

B

C

25

26

27

28

39

29

4130

12

13

_

˜˜

˜=

Keyboard

Progr.

Int. FaultR5

R4

R3

R5

R4

R3

R2

R1

R2

R1Display

Microp.

Function

F81 - 1

F81 - 2

F81 - 3

F81 - 4

Fdf / dt

F27 / 59

14

BI<

BI>

CS-S+

9 Pin Male

242334/3812

31416

1715

5

6419

2018

8

972211

1021

(21)

N.O.

N.C.

(10)

N.O.

N.C.

BPMC

KeyboardTastiera

RS232

Progr.

Int.fault

R4

R3

R2

R1

F24

F27

F47

F59

F27d

F59d

Funzioni

Functions

MC3V

Microp.

Display

R4

R3

R2

R1

D1

D2

D3

16

18

17

14

15

13

12

20

21

19

22

321

DigitalInputs

IngressiDigitali

Rele’DI Uscita

OutputRelays

C

A (S+)

B (S-)RS485

R5

R3

R2

R1 16

18

17

14

15

Rele’Di Uscita

OutputRelays

20

21

19

22

1312

3

21

DigitalInputs

IngressiDigitali

RS485

ComuneComune

To I/0 RelayExpansionAll EspansioneDI I/0

D3

D1

D2

H

L

C

A (S+)

B (S-)

4

5

6

7

8

9

A

B

C

EA

UAUC

UBEBEC

10

11

Auxiliary Supply

Alimentazione Ausiliaria

MS - SCE 1834 - R1

MS - SCE 1834 - R1Standard Output

MS - SCE 1835 - R1I/O Output

MC3V

IEC 255

UM30A

A

B

C

EA

UC UA

UBEBEC

13

12

44

3041

293928

27

26

25

IEC 255

24 (-20%) - 110 (+20%) Vac 24 (-20%) - 125 (+20%) Vdc 80 (-20%) - 220 (+20%) Vac 90 (-20%) - 250 (+20%) Vdc

_

˜˜

˜ =

Uo ˜̃̃BT 2 50

Display

Microp.

Function

F27 / 59

F27d / 59d

F59s

F59U

F81

F59 / 81

Progr.

Int. Fault

Keyboard

R1

R2

R3

R4

R4

R3

R5

R5

R1

R2

2110

112279

81820

1946

51517

161432134/382324

(21)

N.O.

N.O.

N.C.

N.C.

(10)

14

BI<

BI>

CS-S+

9 Pin Male

UM30A

L/+

N/-

Wiring Diagrams

22

MV

12

/MC

3V

MC

61

An

X

MC

12

MD

32

TM

MC

31

An

X/

MC

61

An

X

MV

12

/MC

3V

SC

M2

1

UF

D3

4, U

M3

0

MG

30

/M

G3

0I

SP

M2

1

MV

12

MR

P11

MD

32

GS

C1

4S

MP

R3

00

G1

G2

Mo

tor

Mo

tor

MM

30

/M

CO

MP

eta

CO

N L

/R

PM

14

AP

FC

Pa

ne

l

schem

e -

1

MC

61

An

X

sch

em

e -

2sch

em

e -

1sch

em

e -

2

Schematic - Relay Application

23

SP 50297 R2

Registered Office: L&T House, N. M. Marg, Ballard Estate, Mumbai 400 001, INDIA

Khairasol, Degaul AvenueDurgapur 713 212Tel: 2559848, 2559849, 2559844Fax: 0343-2553614e-mail: [email protected]

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Product improvement is a continuous process. For the latest information and special applications, please contact any of our offices listed here.

Electrical Standard Products (ESP) Branch Offices:

REGISTERED OFFICE AND HEAD OFFICEL&T House, Ballard EstateP. O. Box 278Mumbai 400 001Tel: 022-67525656Fax: 022-67525858Website: www.Larsentoubro.com

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Larsen & Toubro Limited Electrical Standard ProductsPowai Campus, Mumbai 400 072Customer Interaction Center (CIC)BSNL / MTNL (toll free) : 1800 233 5858Reliance (toll free) : 1800 200 5858Tel : 022 6774 5858, Fax : 022 6774 5859E-mail : [email protected] Website : www.LNTEBG.com

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Digi pro Bro 110314 - MCCB,Flexible Wires,Distribution ... · PDF fileLarsen & Toubro Larsen & Toubro is a technology-driven company that infuses engineering with imagination. The