7
JEP0-IL9554
Number of relay connection
Max. 20 relays can be connected through V
0
extension terminal (M-N) of the
relay which is directly connected to MPD-3 type ZVT.
Test button
(Forced operation)
By turning the indicator select switch to "TEST" and pushing "TEST" button
for 2 seconds or more, output contact can be forced to operate (except for
the case of LOCK setting).
Power consumption (Power supply)
Normal
：
3.0VA Operating
：
4.0VA
Case
(Munsell color)
Unit-fixed type
(Fig. 2-11)
(0.6B7.6/0.2)
Unit-drawer type
(Fig. 2-12)
(0.6B7.6/0.2)
Mass
Approx. 0.6kg
Approx. 0.7kg
(*) shows factory setting.
Note) It is necessary to combine MZT type ZCT and MPD-3 type ZVT with MDG-A3V relay.
Don't combine other transformers with this relay.
Application to 3.3kV system voltage:
The MPD-3 type ZVT is intended for use at 6.6kV system voltage.
When applied to a system voltage of 3.3 kV, ZVT secondary output voltage at single-phase fault is 3.5V.
(Half of the rating voltage (7V) at 6.6kV system.)
Therefore, setting and measurement display are as follows:
Example 1) In the case of 10% setting for 3.3kV system, the actual setting value should be 5%, which is half
of 10%.
Example 2) When the V
0
measurement display is 5%, the actual value in 3.3kV system is 10% of the single-phase
fault, which is twice the displayed value.
