JEP0-IL9416
37
D - 8 Performing CT polarity check
To detect the connection (Polarity error or Phase sequence error) of CT connected with primary
side and secondary side of protected transformer, and to display the error codes.
(Refer to the “Protection Relay Instruction Manual” of each model for detailed codes please.)
Operation
Step Description
Switch Press
Indication
1
Start the setting mode.
The SETTING/CANCEL indicator LED comes
on and the item number blinks.
SETTING/
CANCEL
Once
0
2.
1
1
5
Item No.
Item data
S E T T IN G /
C A N C E L
S E L E C T /
S E T
S E T .E N D /
T R IP
U P
D O W N
IN D ./
IN D I.E N D
R E S E T
2
Mode selection (Setting
Æ
Forced
Operation
Æ
Option)
See the section D - 1 for how to select
mode.
(Omitted)
5
0
0
8
Item No.
Item data
3
Select the item number “905” (CT polarity
check).
UP
o
n
5
0
9
Item No.
Item data
4
Make sure that the item number “905” is shown
in the box, and press the SELECT/SET
switch. The item data box will start blinking
instead of the item No. box.
SELECT/SET
Once
5
0
9
Item No.
o
n
Item data
5
Change the item data from “no” (not check) to
“YES” (check).
UP
Once
5
0
9
Item No.
S
E
Y
Item data
6
Make sure that the desired data is shown in the
item data box, and press the SELECT/SET
switch to program the data.
With the “YES” data, the SET.END/TRIP
indicator LED will blink.
At the same time, the item No. box will start
blinking instead of the item data box.
Notice that at this status the “YES” data is not
put into effect.
SELECT/SET
Once
S
E
Y
5
0
9
Item No.
Item data
S E T T IN G /
C A N C E L
S E L E C T /
S E T
S E T .E N D /
T R IP
U P
D O W N
IN D ./
IN D I.E N D
R E S E T
7
-
To execute CT polarity check, press the
SET.END/TRIP switch, the checked
result (code) will comes on in the item data
box for 20 seconds, and then complete the
procedure.
For example: When A-phase
polarity error is detected out, the code 0001
will be display. To cancel the data
programmed without implementing, press
the SETTING/CANCEL switch. The data
programmed will be all cleared to terminate
the procedure.
To put in effect:
SET.END/TRIP
To cancel:
SETTING/
CANCEL
Once
1
0
0
0
5
0
9
Item No.
Item data
S E T T IN G /
C A N C E L
S E L E C T /
S E T
S E T .E N D /
T R IP
U P
D O W N
IN D ./
IN D I.E N D
R E S E T
