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Installation 3. Wiring
Do not perform hot-line work.
It can cause on electrification, electric burn, fire and damage by fire on apparatus.
Installation of protection fuse etc. is recommended to VT and auxiliary power.
Correctly connect the secondary side signal of CT to the CT connection terminal.
Incorrect connection of CT or disconnection of the secondary side of CT induces high
voltage on the secondary side. It can cause insulation breakdown of the secondary winding
which can result in burnout accidents.
Correctly connect secondary side signal of VT to the VT connection terminal.
Incorrect connection of VT or short circuiting in the secondary side of VT causes excessive
current to pass in the VT secondary side. It can cause burnout of the secondary winding
which can result in insulation breakdown of the primary winding and inter phase short-
circuiting in the end.
If the connection to a terminal is not as tight as it should be and result in a measurement
mistake.
CAUTION
When the L side of CT circuit is common wire in 3 phase 4-wire, it is necessary to short-
circuit "C1","C2" and "C3" terminal of this device. In the case of 3 phase 3-wire, "C1" and
"C3" should be short circuited.
Electric wire size should be suitable for rated current and voltage.
Use of unsuitable electric wire can cause a fire.
If terminal wire is pulled strongly, there is possibility that an option unit can break away.
Tensile load is les than 39.2N
At the time of the resisting pressure examination of the high voltage apparatus, carry out
grounding to avoid any negative influence.
The device can break down if more than 2000V is impressed for 1 minute.
Do not connect to non-connection terminal for the purpose of relay etc.
Auxiliary Power
CAUTION
Impress the right voltage to auxiliary power.
If inappropriate voltage is impressed, it can cause a fire or breakdown of the device.
Do not perform hot-line jobs.
Do not open the secondary side of CT circuit.
Do not short circuit the secondary side of VT.
Connect electric wire certainly to a terminal.
Do not forget wiring of "C1","C2" and "C3" for pass.
Do not use unsuitable electric wire.
Do not strongly pull the wire.
Do not impress unusual voltage.
Do not connect to Non-connection terminal.
Impress the appropriate voltage to auxiliary power.
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