ADR141A – Non Communicable 3 OC + 1 EF

over current & earth fault protection relay

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.

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.)

Model Functional Details Cabinet Style
ADR141A Non Communicable Numerical Over current / Earth fault Switchgear Protection Relay. CSA -150

Numerical 3 OC & 1 EF Switchgear Protection Relay : ADR141A


  • 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.