CYG PRS-7367 - Under Current Protection 37 C

Protection Functions
PRS-7367 193
No
Name
Values(Range)
Unit
Step
Default
Description
14
SEF_CurTyp
0~1
-
1
0
Selection of time delay curve type:
=0: definite
=1: IDMT
15
SEF_CoeK
0.05~2
-
0.01
1
Time multiplier for Wattmetric
IDMT curves
16
SEF_Op_T
0~60.000
S
0.001
0.1
Operate delay time for definite
time
17
SEF_Reset_T
0~60.000
S
0.001
0.02
Reset delay time
18
SEF_PTBlkEna
0~1
-
1
0
PTs alarm blocking enable
3.39 Under Current Protection 37C
3.39.1 Overview
This relay provides one stage under current protection for monitoring a motor or capacitor.
3.39.1.1 Function Block
The function block of the protection is as below.
I3P
UCR_37C
Blk
BlkStr
BlkOp
Str
Op
BI52a
3.39.1.2 Signals
Table 3.39-1 Input Signals
Signal
Description
I3P
The current magnitude in all the three phases
Blk
This signal blocks all the binary output signals of the function
BlkStr
This signal blocks all the start outputs of the function
BlkOp
This signal blocks all the trip signals of the function.
BI52a
The binary input from the auxiliary normally opened contact of
circuit breaker
Table 3.39-2 Output Signals
Signal
Description