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8000B Series
Terminals Descriptions
R, S, T Terminals of AC power input.
U,V, W Terminals of AC power output
(+), (-) Spare terminals for connecting external brake unit.
P Spare terminal for connecting external DC reactor.
PB Spare terminal for connecting external brake resistor.
Grounding terminal
3.2.2 Precautions on Main Circuit Wiring
3.2.2.1 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.
3.2.2.2 DC Bus Terminals (+) and (-)
The (+) and (-) terminals 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.
When use external brake unit for inverter of 22kW and above, the poles of (+)
and (-) should not be connected reversely. Otherwise, it may cause damage to
inverter and even cause re.
The cable length of brake unit should be less than 10m. Use twisted pair cable
or connect in parallel.
Do not connect brake resistor directly to the DC bus. Otherwise, it may cause
damage to inverter and even cause re.
3.2.2.3 Terminals (+) and PB of Brake Resistor
The terminals of brake resistor are effective only for inverter of 18.5kW and
below with built-in brake unit.
The cable length of brake resistor should be less than 5m.
3.2.2.4 Terminals P and (+) of External Reactor
For inverter of 22kW and above, the reactor is additional part which is
connected externally.
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