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Medium-voltage Power Distribution Products
FAQ within [ Medium-voltage Power Distribution Products ]
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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:23724
- Release Date:2018/09/19 17:16
- Update:2018/09/20 14:23
- Category: Protection Relays - MELPRO-A Series , MDG
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A momentary power interruption is not detectable. More Details >>
- No:23732
- Release Date:2018/09/19 17:16
- Category: Protection Relays - MELPRO-A Series , MUV
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This relay uses the input voltage at the VT secondary side (P1-P2) as the relay control power source. When a rated voltage is input, b contact side of the co... More Details >>
- No:23733
- Release Date:2018/09/19 17:16
- Category: Protection Relays - MELPRO-A Series , MUV
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The viewpoint of the instantaneous factor operating characteristics graph
It means multiples of the settling value. For example, when an instantaneous factor operation settling value of a relay is 30 A, 100% is read as 30 A. More Details >>
- No:23707
- Release Date:2018/09/19 17:16
- Category: Protection Relays - MELPRO-A Series , MOC
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Operating time of undervoltage detection
It operates with a settled operation time. More Details >>
- No:23731
- Release Date:2018/09/19 17:16
- Category: Protection Relays - MELPRO-A Series , MUV
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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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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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It recovers without retaining. More Details >>
- No:23723
- Release Date:2018/09/19 17:16
- Category: Protection Relays - MELPRO-A Series , MDG
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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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Contact recovery delay after applying voltage
This relay has a capacitor to operate in case of the lost power or at the maximum settling of an operation time. Because this capacitor needs a time to be ch... More Details >>
- No:23734
- Release Date:2018/09/19 17:16
- Category: Protection Relays - MELPRO-A Series , MUV
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