269
6
F
2
S
0
8
5
0
The output signal number of the OCD and OCDP is as follows:
Measuring element
Signal number
OCD-A 372
OCD-B 373
OCD-C 374
OCD1-A 605
OCD1-B 606
OCD1-C 607
EFD 375
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
Signal number
Remarks
OCH-A 599
A-phase
current
OC-A 65
A-phase
current
EF 71
Residual
current
EFL 634
Residual
current
OVG 350
Residual
voltage
UVFS-AB 619 A-to-B-phase
voltage
UVFG-A 625 A-phase
voltage
UVLS-AB 622 A-to-B-phase
voltage
UVLG-A 628 A-phase
voltage
OC1-A 368
A-phase
current
OCBF-A 54 A-phase
current
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.
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