Powtran PI9000-S Series User Manual page 84

Chapter8.Installation and Spare Circuit
※The U, V, W output end of inverter can not install phase advancing capacitor or RC
absorbing device. The inverter input power must be cut off when replacing the motor
※Do not let metal chips or wire ends into inside the inverter when wiring, otherwise
which may cause malfunction to the inverter.
※Disconnect motor or switch power-frequency power supply only when the inverter
stops output
※In order to minimize the effects of electromagnetic interference, it is recommended
that a surge absorption device shall be installed additionally when electromagnetic
contactor and relay is closer from the inverter.
※External control lines of inverter shall adopt isolation device or shielded wire.
※In addition to shielding, the wiring of input command signal should also be aligned
separately, it is best to stay away from the main circuit wiring.
※If the carrier frequency is less than 3kHz, the maximum distance between the inverter
and the motor should be within 50 meters; if the carrier frequency is greater than 4kHz,
the distance should be reduced appropriately, it is best to lay the wiring inside metal
tube.
※When the inverter is additionally equipped with peripherals (filter, reactor, etc.),
firstly measure its insulation resistance to ground by using 1000 volt megger, so as to
ensure the measured value is no less than 4 megohms.
※When the inverter need to be started frequently, do not directly turn power off, only
the control terminal or keyboard or RS485 operation command can be used to control
the start/stop operation, in order to avoid damage to the rectifier bridge.
※Do not connect the AC input power to the inverter output terminals(U, V, W).
※To prevent the occurrence of an accident, the ground terminal( )must be earthed
firmly(grounding impedance should be less than 10 ohms), otherwise the leakage
current will occur.
※The specifications on wires used by the main circuit wiring shall comply with the
relevant provisions of the National Electrical Code.
※The motor's capacity should be equal to or less than the inverter's capacity.
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