Protection Functions
198 PRS-7367
3.40.3 Application Scope
Block busbar protection, together with transformer backup protection, provides simple protection
for busbars that are not specially configured with main protection. When it is used for sectional
block busbar protection, it should be used together with feeder overcurrent blocking logic.
3.40.4 Settings
Feeder Block Busbar Enable
=1:enable,
=0:disable
Section Block Busbar Enable
=1:enable,
=0:disable
Section Block Busbar time delay
The stage i(i=1,2) of Transformer
Block Busbar Enable
=1:enable,
=0:disable
The stage i(i=1,2) of Transformer
Block Busbar time delay
3.41 Gap Over-current & Zero-sequence Over-voltage Protection
3.41.1 Overview
The device provides two-stage Gap overcurrent and zero sequence overvoltage protection, which
is used for transformer backup protection in ungrounded system.
3.41.1.1 Function Block
The function block of the protection is as below.
I3P
OCTG_GAP
U3P
CBCls
Block
Str
Op
BlkOp
Alm
BlkStr
EnaMultCur