8000m Series
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2.2.4 Precautions on Main Circuit Wiring
2.2.4.1 Terminals R, S and T
The wiring at the input side of inverter has no phase sequence requirement. When
input single-phase power, use terminal R and T.
2.2.4.2 DC Bus Terminals (+) and PB of Brake Resistor
The (+) terminal of DC bus have residual voltage right after power-off.
Wait until the CHARGE indicator is OFF and make sure that the voltage is less
than 36V before wiring. Otherwise it may cause electrical shock.
The cable length of brake resistor should be less than 5m.
2.2.4.3 Terminals U, V and W
Capacitor device or surge absorber cannot be connected to inverter output side by
terminals U, V and W. Otherwise, it may cause frequent inverter protection or
damage to inverter.
If motor cable is too long, it may generate electrical resonance easily due to the
impact of distributed capacitance and thus damage the motor insulation or generate
higher leakage current to cause inverter protection. When the length of motor cable
is longer than 50m, installing AC reactor at the output side is necessary.
2.2.4.4 Grounding Terminal
The terminal should be grounded reliably. The resistance value of grounding cable
should be less than 10Ω. Otherwise, it may cause fault or damage to the inverter.
Do not share the grounding terminal with zero line of power supply.
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