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

This relay has a capacitor to operate in case of the lost power or at the maximum settling of an operation time. Because

A momentary power interruption is not detectable.

It is required that the resistance is lower than 5 ohm for a go and return length using sealed cables. The high voltage

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

In steady state, it is 5.0 VA, and during operation, it is 6.0 VA.

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

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

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

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Protection Relays

Protection Relays - MELPRO-A Series(72)

MOC(13)
MGR(5)
MDG(8)
MUV(6)
COMMON(4)

FAQ within [ Protection Relays ]

21-30 of Total 36

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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
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
Detection of undervoltage

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
Combination transformer

It is required that the resistance is lower than 5 ohm for a go and return length using sealed cables. The high voltage receiving facility rule defines “The ... More Details >>
- No：23730
- Release Date：2018/09/19 17:16
- Category： Protection Relays - MELPRO-A Series , MGR
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
Burden of MOC-A1 type

In steady state, it is 5.0 VA, and during operation, it is 6.0 VA. More Details >>
- No：23715
- Release Date：2018/09/19 17:16
- Category： Protection Relays - MELPRO-A Series , MOC
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
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 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
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

21-30 of Total 36

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