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Numerical 3 OC & 1 EF Switchgear Protection Relay : ADR141A

General Description :

The ADR141A is a 3 OC and 1 EF Switchgear Protection relay with Instantaneous high set and

programmable output to simplify feeder protection wiring.

Specifications :

4 Element (3 Phase + EF) over current IDMT

with instant trip.

Display of fault current. / Load current.

Selection of Curve: Six selectable curves(Normal Inverse1 (C1), Normal Inverse2 (C2

Very Inverse (C3), Extremely Inverse (C4),

Long Time Inverse (C5) & Definite Time

(C6).

Separate curve selection for phase and EF.Latching of fault current up-to last 5 fault.

Site selectable CT secondary

Programmable Annunciation Contact

Trip circuit supervision function.

Breaker Fail.

Model Functional DetailsCabinet

Style

Back

ANSI IEC Protection Functions

50 I >> Instantaneous Over current Protection (OC-Inst.)

50N IE>> Instantaneous Earth Fault Protection (EF-Inst.)

51 I>t, Ip Time Over current Protection (Phase) (OC-IDMT.)

51N IE>t, IEP Time Over current Protection (Earth) (EF-IDMT.)
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Numerical Communicable OC/EF Protection Relay : ADR131A


The ADR131A is a three element numerical relay can having following option , 2 OC +1 EF or

3EF relay with Instantaneous high set and programmable output to simplify feeder protection

wiring.

Specifications :

3 Element (2 Phase + EF / 3 Phase / 3EF

current IDMT with instant trip.


Selection of Curve: Six selectable curves

(Normal Inverse1 (C1), Normal Inverse2

Very Inverse (C3), Extremely Inverse (C4


(C6).

Separate curve selection for phase and EF

Latching of fault current up-to last 5 fault




Breaker Fail.

Model Functional Details CabinetStyle

Back

ANSI Protection Functions

50 Instantaneous Over current Protection (OC-Inst.)

50N Instantaneous Earth Fault Protection (EF-Inst.)

51 Time Over current Protection (Phase) (OC-IDMT.)

51N Time Over current Protection (Earth) (EF-IDMT.)

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Numerical 3OC + 1EF Medium Voltage Protection Relay : ADR141C


The ADR141C is a 3 OC and 1 EF Medium Voltage Protection relay with Instantaneous high set

and programmable output design in very compact cabinet.

Specifications :

4 Element (3 Phase + EF) over current ID

with instant trip.


Selection of Curve: Six selectable curves(Normal Inverse1 (C1), Normal Inverse2

Very Inverse (C3), Extremely Inverse (C4


(C6).

Separate curve selection for phase and EFLatching of fault current up-to last 5 fault



Trip circuit supervision.

Model Functional DetailsCabinet

Style

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Numerical Directional 3OC + 1EF Feeder Protection Relay : ADR245B


The ADR245B is multifunction complete feeder protection relay (directional over current / Earth

fault) relay design for requirement of typical medium voltage feeder. All the relay are designed

using latest numerical technology and having programmable digital input and outputs to

minimized external contact multiplication electromechanical relays. All relays are tested for EMI

/ EMC noise as per international IEC specifications. General features of all relays are as given

below

3 stages of Directional / Non Directional 3Io

(Internally derived EF) (3Io>, 3Io>> and3Io>>>).(50N,51N,67N).

3 stages of Directional / Non Directional Ie(Externally EF or REF) (Ie>, Ie>> and

Ie>>>).(64,67N).

Under Voltage (27)

Over Voltage (59)

Neutral Voltage Displacement (59N).

Trip Circuit Supervision.(TC).

Breaker Failure Detection.(BF).

Monitoring Functions.Auto Recloser Relay (ARR).(79)

Negative Phase Sequence.(46).

Relay / Led configuration.

Large 20x4 LCD display for Parameter and

setting display.

Disturbance Recorder. Up 3 sec.

Fully communicable with IEC standard open

protocol. IEC60870-5-103 (RS232C and

RS485).

6 Digital Output (DO) and 8 Optically isolated

digital status input (DI).

Programmable Logic of DI/DO

Display of Voltage, current, PF, Active,Reactive Power in terms of primary value.

Specifications :

4 Element (3 Phase + EF + Sensitive EF)

Directional Over current IDMT/DMT with

instant trip.

Selection of Curve: Five selectable curve(Normal Inverse 1 Normal Inverse 2, Very

Inverse Extremely Inverse Long Time

Inverse and Define Time.

2 Setting Groups.

4 stages of Phase Directional / Non

Directional Over Current element. (Ip1>,

Ip2>, Ip>> and Ip>>>). (50,51,67).100 nos of event memory, 10 nos of Faultdata stored with keypad interface and time

stamping.

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The ADR241A is communicable 3 OC and 1 EF relay with Instantaneous high set and

programmable output to simplify feeder protection wiring.

Specifications :

4 Element (3 Phase + EF) over current IDMTwith instant trip.



(Normal Inverse1 (C1), Normal Inverse2 (C2

Very Inverse (C3), Extremely Inverse (C4),Long Time Inverse (C5) & Definite Time

(C6).

Separate curve selection for phase and EF.

Latching of fault current up-to last 5 fault.




Breaker Fail.

SCADA compatibility. IEC60870-5-103

protocol.

Back






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The ADR231A is a three element communicable numerical relay can having following option , 2

OC +1 EF or 3EF relay with Instantaneous high set and programmable output to simplify feeder

protection wiring.

Specifications :

3 Element (2 Phase + EF / 3 Phase / 3EF ) ove

current IDMT with instant trip.



(Normal Inverse1 (C1), Normal Inverse2 (C2

Very Inverse (C3), Extremely Inverse (C4),


(C6).

Separate curve selection for phase and EF.

Latching of fault current up-to last 5 fault.




Breaker Fail.

RS232C and RS485 Communication port.

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