NR Electric PCS-9611, Instruction Manual, Page: 106 / 300

3 Operation Theory
PCS-9611 Feeder Relay
3-70
Date: 2014-04-08
[37.En1]
[37.En]
[37.Blk]
Ia < [37.I_Set]
&
Ic < [37.I_Set]
Ib < [37.I_Set]
[37.Op]
[37.St]
&
t
UC
0
[BI_52a]
Figure 3.21-1 Logic diagram of the undercurrent protection
Where:
[37.I_Set] is the current setting of the undercurrent protection;
[BI_52a] is the binary input from the auxiliary normally opened contact of the circuit breaker;
“t
UC
” is the setting [37.t_Op], the time setting of the undercurrent protection;
[37.En] is the logic setting of the undercurrent protection;
[37.En1] is the binary signal for enabling the undercurrent protection;
[37.Blk] is the binary signal for blocking the undercurrent protection.
3.21.2 Undercurrent Protection Settings
All the settings of the undercurrent protection are listed in the following table. For the information
about the common explanation of the settings, see Section 7.3 .
No. Menu text Explanation Range Step
1 37.I_Set The current setting of the undercurrent protection 0.1In~1.0In 0.001A
2 37.t_Op The time setting of the undercurrent protection 0~100s 0.001s
3 37.En The logic setting of the undercurrent protection 0~1 1
4 37.OutMap
The output matrix setting of the undercurrent
protection
0x00000 ~
0xFFFFF
1