General Description
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.
| 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.) |
| Model | Functional Details | Cabinet Style |
| ADR131A-AM10101 | Non Communicable Numerical 2 OC + 1EF Relay. | CSA-150 |
| ADR131A-AM10201 | Non Communicable Numerical 3 OC Relay. | CSA-150 |
| ADR131A-AM10301 | Non Communicable Numerical 3 EF Relay. | CSA-150 |
Numerical Communicable OC/EF Protection Relay : ADR131A
Specifications
- 3 Element (2 Phase + EF / 3 Phase / 3EF ) 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.