Shenzhen Hpmont Technology Co., Ltd.
Chapter 3 Electrical Installation
HD3N-TC Series Inverter User Manual V1.0
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5
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Chapter 3
Electrical Installation
3.1
Precautions
3.1.1
Wiring
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Only qualified electrical engineer can perform wiring job.
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To facilitate the input side over-current protection and outage maintenance, connect inverter with power supply
via the MCCB or fuse.
•
Do not dismantle inverter or do wiring operation until the power is cut-off for more than 10 minutes, the internal
charge indicator of inverter is off and the voltage between (+) and (-) of the main circuit terminals is below 36V.
•
Check the wiring carefully before connecting emergency stop or safety circuit.
•
There is more than 3mA leakage current in inverter grounding, depending on the running conditions. To ensure
safety, inverter 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 inverter when it is live. The main circuit terminals are neither allowed
connecting to the enclosure nor short-circuiting.
•
Do not do dielectric strength test on inverter.
•
For inverter with more than 2 year’s storage, please use regulator to power it slowly.
•
Do wiring connection of the braking resistor or the braking unit according to the wiring figure.
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Make sure the terminals are fixed tightly.
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Do not connect the AC supply cable to the output terminals U/V/W of inverter.
•
Do not connect the phase-shifting capacitors to the output circuit.
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Switch motor or do variable and industrial frequency when inverter is in stop status.
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The inverter DC bus terminals must not be short-circuited.
Danger
Warning