Safety and Precautions
VD300 Series Inverter User Manual
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Do not drop conductive objects as wire ends or screw into inverter. Failure to comply will result in
damages.
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Install inverter in place avoid to vibration, water drops and direct sunlight.
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When two inverters are installed in the same cabinet, arrange the installation positions properly to
ensure normal cooling effect, keep the cabinet with good ventilation.
1.2.3 At Wiring
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Wiring must be performed only by qualified personnel under instructions described in this manual.
Failure to comply may result in unexpected accidents.
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A circuit breaker must be used to isolate the power supply and inverter. Failure to comply may
result in a fire.
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Ensure that the power supply is cut off before wiring. Failure to comply may result in electric shock.
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Connect inverter to ground properly by standard. Failure to comply may result in electric shock.
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Do not connect the input power with output terminals U, V, W, confirm the mark on terminal before
connection to avoid wrong wiring. Failure to comply can damage the inverter!
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Never connect the braking resistor between the DC bus terminals P+ and P-. Failure to comply
may result in a fire.
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The wire size of main circuit should conformed to standard, the wiring should comply with EMC
and local safety standard. Failure to comply may result in accidents.
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Use shielded cable for input output control circuit of analog and rapid speed pulse signal, and
ensure the shielding layer is reliably grounded.
1.2.4 Before Power-on:
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Check that the following requirements are met:
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The voltage class of the power supply is consistent with the rated voltage class of the AC drive.
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The input terminals (R, S, T) and output terminals (U, V, W) are properly connected.
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No short-circuit exists in the peripheral circuit.
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The wiring is secured.
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The external units of inverter and wires are configured under the manual instructed, all matched
circuit and wiring are correctly connected.
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Failure to comply will result in damage to inverter!
1.2.5 After Power-on
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Do not open the cover after inverter power-on to prevent electric shock.
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Do not touch or operate the inverter with wet hands. Failure to comply will result in electric shock.
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Do not touch any terminal of inverter after power-on, or drag connection cable. Failure to comply
will result in equipment damage or electric shock.
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Do not try to check or change the manufacturer parameter. Failure to comply may result in
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