Burden of MOC-A1 type

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

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 >>

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 >>

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 >>

Detection of current

It operates on a root mean square value of a fundamental wave. More Details >>

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 >>

Position of switch

The prohibition position sets the maximum settling value. With the definite time current, all prohibition positions set 6 A, and with the instantaneous curre... More Details >>

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 >>

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 >>

Combination transformer

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