CYG PRS-7367 User Manual

Protection Functions
PRS-7367 207
No.
Name
Values
(Range)
Unit
Step
Default
Description
1
64REF_Cur_Str
0.05~20.00
IE
[Note1]
0.01
0.40
Pickup setting of REF
2
64REF_Cur_Alm
0.05~20.00
IE
[Note1]
0.01
1.00
Alm setting of REF
3
64REF_Slope
0~0.9
-
0.1
0.6
Percentage restraint
coefficient of REF
0.5 is recommended.
4
64REF_Ena
0/1
-
1
0
Logic setting of
enabling/disabling REF
0: disable
1: enable
5
64REF_Alm_Ena
0/1
-
1
0
Logic setting of
enabling/disabling
REF_Alm
0: disable
1: enable
6
64REF_NPCur_Ena
0/1
-
1
1
Logic setting of
enabling/disabling neutral
current criterion
0: disable
1: enable
7
64REF_CTS_Blk_Ena
0,1
-
1
0
Logic setting of
enabling/disabling block
biased differential element
during CT circuit failure
0: disable
1: enable
[Note1]: IE=1000.0 * Sn / ( Un_SV *I1n_S1V * 1.732 );
Sn and Un_SV are Parameters; I1n_S1V means one side rated Current Primary parameter, up to
the configuration of I1n in Side _SC, the default parameter is Prot_TA_Primary.
3.43 Transformer Current circuit supervision TF CTS
3.43.1 Overview
The main purpose of Current circuit supervision (CTS) is to monitor the protected electrical
network by the help of instrument transformer (CT). This is a backup function for CT circuit failure.
If CT balance coefficient at one side is relatively little, the different current resulting from CT circuit
failure is very small. Therefore, the CT circuit failure alarm cannot be issued. The function is used
to prompt the operator to check and confirm whether the CT is normal or not.
The operation principle criteria of Current circuit supervision CT’s based on the following points:
 Three phase zero-sequence current

CYG PRS-7367 Specifications

General

Brand	CYG
Model	PRS-7367
Category	Control Unit
Language	English