Chapter 3 Electrical Installation
MONT20 User Manual V1.6 7
Chapter 3 Electrical Installation
3.1 Precautions
• Only qualified electrical engineer can perform wiring job.
• To facilitate the input side over-current protection and outage maintenance, connect MONT20 with supply via the
MCCB or fuse.
• Do not do wiring until the power of MONT20 is cut off for more than 10 minutes.
• Check the wiring carefully before connecting emergency stop or safety circuit.
• There is more than 3mA leakage current in MONT20 grounding, depending on the operating conditions. To
ensure safety, MONT20 and the motor must connect to separate and independent grounding wire, so as to
ground reliably. It must use type B mode when utilize ground leakage protection devices (ELCB/RCD).
• Do not touch the wire terminals of MONT20 when it is charged. The main circuit terminals are neither allowed
connected to the enclosure nor short-circuiting.
The bare portions of the power cables must be bound with insulation tapes.
• Do not do dielectric strength test on MONT20.
• Connect the terminals firmly.
• Do not start or stop MONT20 by connect/disconnect the contactor.
• Do not connect the input power to U, V, W terminals of MONT20.
• Do not connect the phase-shifting capacitors to the output circuit.
• Be sure the AC input power supply voltage is the same as rated input current of MONT20.
3.2 Electrical Requirement
The recommended specifications of cables are shown as below table.
The size of ground cable should accord with the requirement in 4.3.5.4 of IEC 61800-5-1.
Power Supply Cable (mm
2
) Motor Cable (mm
2
) Ground Cable (mm
2
)
0.75 0.5 2.5
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