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

Set the display selection switch on the front upper right of the relay to “Time limit pass.” When a relay detects near t

It lights up with 85 V or more control power.

Because this relay derives the control power from input of the CT secondary current, when the input current falls below

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

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

It is required that the resistance is lower than 5 ohm for a go and return length using sealed cables. Other than MPD-3

Input from the primary side by combining with a peripheral device (ZCT). In Standard JIS C 4601, performance warranty is

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Medium-voltage Power Distribution Products

Protection Relays(72)

Protection Relays - MELPRO-A Series(72)

FAQ within [ Medium-voltage Power Distribution Products ]

11-20 of Total 36

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Rated current

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
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
Confirmation method of the start-up value

Set the display selection switch on the front upper right of the relay to “Time limit pass.” When a relay detects near the operation value, “0” will be displ... More Details >>
- No：23716
- Release Date：2018/09/19 17:16
- Category： Protection Relays - MELPRO-A Series , MOC
About contact

It recovers without retaining. More Details >>
- No：23723
- Release Date：2018/09/19 17:16
- Category： Protection Relays - MELPRO-A Series , MDG
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
A lighting condition of RUN

Because this relay derives the control power from input of the CT secondary current, when the input current falls below about 0.5 A for 2-phase input or abou... More Details >>
- No：23708
- Release Date：2018/09/19 17:16
- Category： Protection Relays - MELPRO-A Series , MOC
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：23724
- Release Date：2018/09/19 17:16
- Update：2018/09/20 14:23
- Category： Protection Relays - MELPRO-A Series , MDG
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

It is required that the resistance is lower than 5 ohm for a go and return length using sealed cables. Other than MPD-3 type ZVT, it is similar to the distan... More Details >>
- No：23719
- Release Date：2018/09/19 17:16
- Category： Protection Relays - MELPRO-A Series , MDG
Test method

Input from the primary side by combining with a peripheral device (ZCT). In Standard JIS C 4601, performance warranty is covered for combination of periphera... More Details >>
- No：23728
- Release Date：2018/09/19 17:16
- Category： Protection Relays - MELPRO-A Series , MGR

11-20 of Total 36

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