KRB-5404
75
: Flashing
Fig. 67 OCR function check screen navigation
Table 37 OCR function check subscreens
No.
Subscreen item *1
Description
○
1
(Monitor screen)
See 5-3-2-3.
○
2
(Function check start subscreen)
–
○
3
Long time delay trip
"LT" flashes. *2 *3
○
4
Short time delay trip
"ST" flashes.
○
5
Instantaneous trip
"INST" flashes.
○
6
Ground fault trip
"GF" flashes.
○
7
OCR + ACB operation
"TRIP" flashes.
○
8
OCR operation only
"NTR" flashes.
○
9
Indication during testing *4
Pressing SET while subscreen
○
7
or
○
8
opens causes a test signal to be applied.
○
10
Trip event log (fault current value)
The trip cause and fault current value are indicated.
○
11
Trip event log (operating time)
The trip cause and operating time are indicated.
*1 If no log is found, the corresponding subscreen is skipped.
*2 When the long time delay trip function is selected, the short time delay trip and instantaneous trip functions are locked inoperative and cannot be used. The pretrip alarm function
can be used.
*3 Even when the HOT mode is selected, the test is carried out in COLD mode (Accumulated current value before testing is reset to zero before the test starts).
*4 Only when the long time delay trip function is checked. The number of the signal source and "TRIP" are flashing. For other function checks, subscreen
○
7
or
○
8
will continue.
◯
6
◯
8
◯
11
◯
1
◯
3
◯
7
◯
9
◯
10
◯
2
× 5
× 6
◯
2
◯
4
◯
8
◯
2
◯
11
◯
5
◯
7
◯
10
◯
6
◯
3
