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Power Protection Relays

Electromechanical TypeOver Current & Earth Fault Model : CDG11/12/13/14/31/33/34CDG Relays - Disc Type Non Directional IDMT Over Current & Earth Fault Relay

Over Current & Earth Fault Model : CDG21/23/24/61/63/64CDG Relays - Disc Type Non Directional IDMT Over Current & Earth Fault Relay with Instantaneous Unit

Directional Over Current & Earth Fault Model : CDD21/31/41CDD Relays - Disc Type DirectionalIDMT Over Current & Earth Fault Relay

Voltage Controlled Over Current

Model : CDV22/62CDV Relays - Disc Type Voltage Controlled Non Directional IDMT Over Current Relay

Three Pole Definite Time Relay

Model : CTU12/22/32/62

Three Pole Instantaneous Relay

Model : CAG37

Single Pole Instantaneous Relay (Specially Used for Restricted Earth Fault in Transformer

Model : CAG12/14

Numerical Feeder Protection Relay

Model : MiCOM P111/121/122/123Model : MiCOM P125/126/127Model : MiCOM P141/142

Protections

1. 3 Phase IDMT/DMT/INST Over Current & Earth Fault Relay2. Directional/Non Directional Over Current & Earth Fault Relay

3. Negative Phase Sequence

4. Thermal O/L

5. Under Current

6. Under/Over Voltage Relay

7. Under/Over Frequency Relay

8. Auto Reclosing

Static Type

Description : Static Type Motor Protection relay

Model : CTMM501/510/401/501

Protections

1. Short Circuit Over Current & Earth Fault Relay2. Negative Phase Sequence

3. Thermal O/L

4. Lock Rotor

Description : Numerical Motor Protection Relay

Model : MiCOM P211/220/225/226

Protections

1. Short Circuit Over Current & Earth Fault Relay2. Negative Phase Sequence

3. Thermal O/L

4. Lock Rotor/Prolong Start

5. Under Current

6. Under/Over Voltage Relay

Static Type

Description : Rotor Earth Fault RelayModel : VAEM21VAEM Relays – Rotor Earth Fault Protection for Generators

Description : Negative Phase Sequence Protection

Model : CTNM12/31CTNM Relays – Negative Phase Sequence Relays

Description : Check Synchronising Relay

Model : SKE11/SKD11SKE Relays – Static Check synchronizing relay

Description : Sensitive Power Relay

Model : WCDM11/13WCDM Relays – Sensitive Power Protection for Generators

Description : Field Failure Protection

Model : SKE11/SKD11YCGF Relays – Field Failure Protection for Generators

Description : Numerical Generator Protection Relay

Model : MiCOM P341/343/345

Protections

1. Generator Differential2. Non Directional Over Current & Earth Fault Relay

3. Negative Phase Sequence

4. Under Current

5. Under/Over Voltage Relay

6. Under/Over Frequency Relay

7. Sensitive Earth Fault

8. Rotor Earth Fault

9. Field Failure

10. Reverse/forward/over Power

Description : Transformer Differential Relay

Model : DTH31/32DTH Relays – Three phase harmonic restraint differential relay

Description : Over Fluxing Relay

Model : GTT21/GTTM22GTT Relays – Definite Time/Inverse time Over Fluxing relay

Description : MIDOS Case type Static Biased Differential Relay

Model : MBCH12/13MBCH Relays – Two/Three Winding Transformer Biased Differential relay

Description : Numerical Transformer Protection Relay

Model : MiCOM P631/632/633/634Model : MiCOM P630C

Protections

1. Differential2. Non Directional Over Current Protection

3. Restricted Earth fault Protection

4. Under/Over Voltage Relay

5. Under/Over Frequency Relay

6. Over Excitation Protection

7. Thermal Over Load Protection

8. Breaker Failure

Description : Numerical Voltage Regulating Relay

Model : KVGC202

Supervision & Monitoring

1. Runaway Protection2. Under/Over Voltage Detection & Blocking

3. Over Current Detection

4. Tap Position Indication

5. Tap Changer Maintenance

6. Tap Changer Failure Mechanism

Description : Numerical Distance Protection Relay

Model : MiCOM P441/442/444Protections

1. 5 zones Distance Protection for Phase & Ground2. Directional/Non Directional Over Current & Earth Fault Relay

3. Directional/Non directional Negative Phase Sequence

4. Power swing blocking

5. Under/Over Voltage Relay

6. Auto reclosing

7. Thermal Over Load

8. Check Synchronizing

9. Directional Zero Sequence Protection

10. Out of Step Tripping

Description : Numerical Busbar Protection Relay

Model : MiCOM P741/742/743

Protections

1. High Speed Busbar Differential Protection2. Sensitive Earth fault current controlled Busbar Protection

3. Phase Over Current & Earth fault

4. Dead Zone Protection

5. CT Supervision

6. Breaker Failure

Electromechanical Type

Description : Over Voltage & Under Voltage

Model : VDG11/13VDG Relays - Disc Type IDMT Over / Under Voltage Relay

Description : Neutral Voltage Displacement Relay

Model : VDG14Disc Type Inverse time neutral Displacement Relay

Description : No Voltage/Over Voltage / Under Voltage

Model : VAG11/21VAG Relays - Static Type No/ Over / Under Voltage Relay

Description : Instantaneous Over Voltage / Under Voltage

Model : VAGM22VAGM Relays – Instantaneous Static Over / Under Voltage Relay

Description : Definite Over Voltage / Under Voltage

Model : VTUM21/61VTUM Relays – Definite TIme Over / Under Voltage Relay

Description : Numerical Voltage & Frequency Protection Relay

Model : MiCOM P921/922/923/941/943

Protections

1. Under/Over Voltage Relay2. Under/Over Frequency Relay

3. Residual Over Voltage

4. Negative Sequence /Positive Sequence Over Voltage

5. Rate of change of Frequency

Description : Voltage Operated Auxiliary Relay

Model : VAA 11/21/31/41/51/61/81/121/12/22/32/13/23/33Voltage Operated single/double/triple element auxiliary relays

Description : Voltage Operated Tripping Relay

Model : VAJH13/23Model : VAJS13/23Model : VAJHM13/23/33/53 Voltage Operated single/double/triple element High speed tripping relays

Description : Voltage Operated Trip Circuit Supervision Relay

Model : VAX21/31Voltage Operated Trip Circuit Supervision relays

Description : Static Delay ON/OFF Time Relay

Model : VTT11/VTT12VTT Relays – Static Delay ON/OFF time relay