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- FAQ > Medium-voltage Power Distribution Products > Protection Relays
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FAQ within [ Protection Relays ]
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The operating time of the instantaneous factor operating characteristics
That is right. Standard JIS C 4602 defines it shall be 50ms or shorter when 200% of the settling value is input. More Details >>
- No:23706
- Release Date:2018/09/19 17:16
- Category: Protection Relays - MELPRO-A Series , MOC
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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
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Because the contact capacity is different to that of a contact for trip, it cannot be used for tripping. Refer to the catalog for the contact capacity. More Details >>
- No:23737
- Release Date:2018/09/19 17:16
- Category: Protection Relays - MELPRO-A Series , COMMON
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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
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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
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In CT circuit, it is 5 A. More Details >>
- No:23713
- Release Date:2018/09/19 17:16
- Category: Protection Relays - MELPRO-A Series , MOC
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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
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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
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Combination with other companies' peripheral devices
It is impossible. In Standard JIS C 4609, warranty is covered for combination of peripheral devices and relays. Therefore, combination with other companies’ ... More Details >>
- No:23718
- Release Date:2018/09/19 17:16
- Category: Protection Relays - MELPRO-A Series , MDG
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It operates on a root mean square value of a fundamental wave. More Details >>
- No:23710
- Release Date:2018/09/19 17:16
- Category: Protection Relays - MELPRO-A Series , MOC
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