It means multiples of the settling value. For example, when a definite time factor operation settling value of a relay i

Overload tolerance of an over current relay is 200 A, 1 second. Adjust CT ratio and others not to input more than 200 A.

It lights up with 85 V or more control power.

That is described as below. (1) By laying ZCTs for two feeders having different loads, detected by one earth fault dir

The contact recovers automatically.

Because between memories, a value becomes unstable, reset the position to the correct position.

Set the frequency to meet the frequency of the region. Incorrect frequency prevents correct detection.

Up to 5 units. To connect 6 or more units, use Vo extended terminals (M-N) of a relay connected from MPD-3 type. From th

It is impossible. It is required to combine with MZT type ZCT dedicated for our products.

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FAQ > Medium-voltage Power Distribution Products > Protection Relays > Protection Relays - MELPRO-A Series

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Protection Relays - MELPRO-A Series

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FAQ within [ Protection Relays - MELPRO-A Series ]

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The viewpoint of the definite time factor characteristic graph

It means multiples of the settling value. For example, when a definite time factor operation settling value of a relay is 3 A, 1x is read as 3 A and 5x is re... More Details >>
- No：23705
- Release Date：2018/09/19 17:16
- Category： Protection Relays - MELPRO-A Series , MOC
Short-circuit detection

Overload tolerance of an over current relay is 200 A, 1 second. Adjust CT ratio and others not to input more than 200 A. More Details >>
- No：23711
- Release Date：2018/09/19 17:16
- Category： Protection Relays - MELPRO-A Series , MOC
A lighting condition of the RUN LED

It lights up with 85 V or more control power. More Details >>
- No：23721
- Release Date：2018/09/19 17:16
- Category： Protection Relays - MELPRO-A Series , MDG
About contact

That is right. More Details >>
- No：23722
- Release Date：2018/09/19 17:16
- Category： Protection Relays - MELPRO-A Series , MDG
Combination transformer

That is described as below. (1) By laying ZCTs for two feeders having different loads, detected by one earth fault directional relay. In this case, it i... More Details >>
- No：23726
- Release Date：2018/09/19 17:16
- Update：2018/09/20 13:26
- Category： Protection Relays - MELPRO-A Series , MGR
About contact

The contact recovers automatically. More Details >>
- No：23736
- Release Date：2018/09/19 17:16
- Category： Protection Relays - MELPRO-A Series , MUV
Position of switch

Because between memories, a value becomes unstable, reset the position to the correct position. More Details >>
- No：23738
- Release Date：2018/09/19 17:16
- Category： Protection Relays - MELPRO-A Series , COMMON
Movement indicator

Set the frequency to meet the frequency of the region. Incorrect frequency prevents correct detection. More Details >>
- No：23740
- Release Date：2018/09/19 17:16
- Category： Protection Relays - MELPRO-A Series , COMMON
Combination transformer

Up to 5 units. To connect 6 or more units, use Vo extended terminals (M-N) of a relay connected from MPD-3 type. From this Vo extended terminals, additional ... More Details >>
- No：23725
- Release Date：2018/09/19 17:16
- Category： Protection Relays - MELPRO-A Series , MDG
Combination transformer

It is impossible. It is required to combine with MZT type ZCT dedicated for our products. More Details >>
- No：23729
- Release Date：2018/09/19 17:16
- Category： Protection Relays - MELPRO-A Series , MGR

11-20 of Total 36

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