ABB REL 356 Current Differential Protection
5-24
Testing
Out Of Step System Functional Tests
For systems equipped with OST logic the following settings may be used to check the OST logic in REL 356:
NOTE: These tests are optional and require programing Computer Aided, Multi-amp or Doble test equipment.
In the R-X diagram, the positions shown correspond to the following quantities:
PANG = 65
GANG = 65
ZR = 3.0
BKUP = OUT
LOPB = NO
FDOP = IN
FDOG = IN
DIRU = ZSEQ
IOM = 0.5
TOG = BLK
Z2P = 8.5
T2P = 0.1
Z2GF = 6.5
Z2GR = 0.01
T2G = 0.1
Z3P = 11.0
T3P = .2
Z3GF = 11.0
Z3GR = 0.01
T3G = .2
OST = WAYO
OSB = BOTH
RT = 2.0
RU = 4.0
OST1 = 2
OST2 = 3
OST3 = 3
OSOT = 100
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