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7 Setting and procedure for operation
QE81WH4W
7.5 Wiring
7.5.1 Precautions
for
wiring
(1) The voltage transform unit is required for voltage input. (Refer to section 7.5.3)
(2) For the current circuit input, Mitsubishi’s current sensor is required. (Refer to section
7.5.3)
(3) Connect cables. For connecting voltage transformer, voltage transform unit and current
transformer, refer to the corresponding wiring diagram.
(4) Do not install the input signal wire together with the main circuit lines or power cables.
Keep a distance as below. (Except for the terminal input part) Failure to do so may
result in malfunction due to noise.
Conditions
Distance
Power line of 600V or less and 600A or less
300mm or more
Other power line
600mm or more
(5) For input wiring of the measurement circuit, use separate cables from other external
signals in order to prevent from AC surge and induction.
(6) Keep any object off the cables.
(7) Protect cable coating from scratch.
(8) Cable length should be routed in length with a margin, please take care to avoid causing
stress to pull the terminal block. (Tensile load: less than 22N)
(9) Please do not connect two or more cables to one terminal hole of the current input
terminal block. And, please do not connect three or more cables to one terminal hole
of the voltage input terminal block. The engagement of the terminal becomes weak,
and cable may fall out.
(10) In actual use, please connect the SLD terminal to a shield.
