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.)
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).
