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The output signal number of the OCD and OCDP is as follows:
Operation must be verified by abruptly changing the test current from 0 A to 1.2 × Setting value
or vice versa.
OCD, OCD1 and EFD have a fixed setting.
6.5.1.14 Level Detectors OCH, OC, EF, EFL, OVG, UVLS, UVLG, UVFS, UVFG, OCBF and OC1
Voltage or current level detectors are tested by applying voltage or current individually. A
single-phase test source is adequate for these tests.
Change the magnitude of the voltage or current applied and measure the value at which the
element operates. Check that the measured value is within 5% of the setting in operation. OCBF
resets within 5% of the setting × 0.8.
Level detectors and their output signal numbers are listed below.
Measuring element
OCH-A
OC-A
EF
EFL
OVG
UVFS-AB
UVFG-A
UVLS-AB
UVLG-A
OC1-A
OCBF-A
6.5.2
Timer
The pick-up delay time of the variable timer can be measured by connecting the monitoring jacks
A and B to a time counter as shown in Figure 6.5.2.1. Jacks A and B are used to observe the input
signal and output signal of the timer, respectively.
Measuring element
OCD-A
OCD-B
OCD-C
OCD1-A
OCD1-B
OCD1-C
EFD
Signal number
599
65
71
634
350
619
625
622
628
368
54
269
Signal number
372
373
374
605
606
607
375
Remarks
A-phase current
A-phase current
Residual current
Residual current
Residual voltage
A-to-B-phase voltage
A-phase voltage
A-to-B-phase voltage
A-phase voltage
A-phase current
A-phase current
6 F 2 S 0 8 5 0
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