Scope of Application

It is impossible. Because the type is to detect by ZCT in an ungrounded system, the sensitivity becomes very high. More Details >>

About contact

The contact recovers automatically. More Details >>

The application of the overcurrent relay

It is possible. Connect R-phase to the terminal for R-phase of the relay, and T-phase to the terminal for T-phase of the relay. And the direction of a curren... More Details >>

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 >>

Return of contact

The contact recovers automatically. More Details >>

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 >>

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 >>

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 >>

Burden of MOC-A1 type

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

Combination transformer

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