Mitsubishi Electric MELPRO MDG-A3V-R, Инструкция по эксплуатации

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16 JEP0-IL9554
3. Operation characteristics test
[MDG+ZCT+ZVT combination]
① In the field test, it is necessary to check the wiring or directionality, so the voltage is applied from the primary
side (high-voltage side) of zero-sequence voltage detector. There are 2 ways to do this, either by combining the
devices to form a test circuit (refer to Fig. 2-5) or by using a commercially available relay tester shown in Fig.
2-6.
② When this test is carried out, be sure that the main circuit is turned OFF.
③ When the rated power supply voltage is applied, the RUN display LED (green) lights up. This indicates that the relay
works properly.
④ By turning the indicator select switch to "TEST" and pushing "TEST" button for 2 seconds or more, output contact
can be forced to operate (except for the case of LOCK setting).
4. Operation characteristic control point
Perform the test periodically according to the following test conditions and criteria.
Test item
Test condition
Criteria
I
0
setting V
0
setting Time setting Input
I
0
operation
value
Each setting Minimum Instantaneous
V
0
= Setting × 150%
at the max.
sensitivity angle
± 10% of setting
value
V
0
operation
value
Minimum Each setting Instantaneous
I
0
= Setting × 150%
at the max.
sensitivity angle
± 25% of setting
value
Phase
characteristics
Minimum Minimum Instantaneous
V
0
= Setting × 150%
I
0
= Setting × 1000%
Max. sensitivity
angle = 45 ° setting
Lag: 25 ～ 65 °
Lead: 115 ～ 155 °
Max. sensitivity
angle = 10 ° setting
Lag: 50 ～ 85 °
Lead: 90 ～ 130 °
Operating time
characteristics
Minimum Minimum
Instantaneous V
0
= Setting × 150%
I
0
= Setting × 130%
Applied at the same
time at the max.
sensitivity angle
50 ～ 100ms
0.2s 0.1 ～ 0.3s
0.3s or more
± 20% of setting
time