CYG PRS-7367 User Manual

Protection Functions
PRS-7367 53
No.
Name
Values(Range)
Unit
Step
Default
Description
5
51GVTi_Curve_ParaB
0.000~9.000
s
0.001
0
The Stage i Curve parameter B
6
51GVTi_Curve_ParaC
0.0~1.0
-
0.1
1.0
The Stage i Curve parameter C
7
51GVTi_Curve_ParaP
0.02~2.00
-
0.01
2.00
The Stage i Curve parameter P
8
51GVTi_Curve_ParaK
0.05-100
-
0.01
1.00
The Stage i Curve parameter k
9
51GVTi_Min _Op_T
0.040-60.000
s
0.001
0.040
The Stage i Minimum Operating
time for IDMT
10
51GVTi_Reset_T
0.000 -60.000
s
0.001
0.02
The Stage i Reset delay time
11
51GVTi_Ena
0~1
-
1
0
The Stage i Operation
Enable/Disable
12
51GVTi_AlmEna
0~1
-
1
0
The Stage i Alarm Enable/Disable
13
51GVTi_3I0_Calc_Ena
0~1
-
1
0
The Stage i measured residual
current/calculated residual current
3.5 Directional earth-fault protection 67G
3.5.1 67G Overview
This relay provides four stages of directional earth-fault overcurrent protections with independent
definite time and inverse definite minimum time characteristics. Each stage can be enabled or
disabled independently by the corresponding logic setting respectively.
When this relay is used in small resistance grounding system, the grounding zero sequence
current during earth fault is larger and can be used for tripping directly. All stages are equipped for
the zero sequence overcurrent protection. In this case, the zero sequence current for tripping can
be calculated or directly derived from a zero sequence current transformer.
3.5.1.1 Function Block
The function block of the protection is as below.
OCTG_67G
Blk
Blk_Str
Blk_Op
Str
Op
Ena_Mult
U3P
I3P
PTSAlm
CTSAlm
Figure 3.5-1 Function block
3.5.1.2 Signals
Table 3.5-1 Input Signals
Signal
Description
U3P
The voltage in all the three phases

CYG PRS-7367 Specifications

General

Brand	CYG
Model	PRS-7367
Category	Control Unit
Language	English