Ashida ADR241B, Instruction Manual

Page: 260 / 272

ADR241B
Doc ID : ADR241B-DO_IM_01
Ref ID : ADR241B/IM/DR
Rev No. : 06
Page No. : 260 of 272
10.5 Over current function
The following settings are set into the relay for simulate the over current function to operate
and observe the waveform in the Disturbance recording and event in the event recording.
Stage1: I>1 Enable = Yes
IP>1 = 50%
IP>1 TMS = 1
IP>1 Curve = DT
tIP>1 DT Delay = 0
Assign IP>1 trip function in Output relay1 (OUT1).
There are two stages are simulated through the power system simulator for the pre-fault and
fault simulation, the first stage is normal condition for 1000 millisecond and second stage is
fault condition for 500 millisecond as given below.
And the above condition, The IP>1 elements is operated when the over current exceeded the
pickup value and relevant feedback is received in power system simulator and stopped the
current injection. The relevant Waveforms are recorded and it can be analyzed by using the
DR analysis software. Analogue and Digital channels should be recorded with pre-fault and
post fault conditions. Waveform can be exported to COMTRADE format.
Disturbance Record