Numerical
Numerical O/C + REF Protection Relay For
Transformer :
ADR221B
Back
General Description :
ADR221B is second generation Numerical
Integrated Over Current Relay for Traction
Application. It consist all the necessary
protection and monitoring functions required
for LV side and HV side of Traction
Transformer Feeder.
Disturbance Recorder. 50 cycles of actual
waveform of voltage & current (45 pre-fault &
5 post fault) are captured & saved in the builtin
memory with date time stamping, for
analyzing fault condition.
Separate
Communication Ports for SCADA
(RS485) as well as Local testing (RS232C)
Fully communicable with IEC standard open
protocol.
Very low burden on CT (less than 0.5VA).
Online display of Primary current i.e.
load
current and unbalance current.
Continuous monitoring of module’s
internal
hardware and alarm generation in case
of
failure of any critical components.
Facility to synchronised Relay time with
external GPS network.
10 Digital Output contacts for local alarm as
well as tele-signalling.
9 Optically isolated digital status input for
monitoring of status and avoid used of
external relay logic.
100 nos of event memory, event such CB
close, Trip, digital status change, relay pkp
etc. All events are with date and time stamped
up to 1ms.
Instantaneous Over-Current Protection.
Large 20x4 LCD display for Parameter and
setting display.
Specifications :
Specially designed for Traction OHE
protection. As per RDSO specs
TI/SP/PSI/PROTCT/4050.
2 Element (1 OC + 1 CUR) over current IDMT
with Current Unbalance Relay.
Two stage Protection (IDMT for Fault and
Definite Time for overload).
Breaker Failure detection.
In-built CB trip circuit monitoring during close
as well as open condition.
Model
Functional Details
Cabinet Style
ADR221B
Numerical
O/C + REF Protection Relay For Transformer
