Denso RC7M - Wiring of Primary Power Source

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6.3.2 Wiring of Primary Power Source
Observe the following precautions when wiring the primary power source of the robot
controller:
(1) Connect the robot power cable to a power source separate from the welder power
source.
(2) Ground the grounding wire (green) of the robot power cable.
(3) Ground the grounding terminal of the robot controller using a wire of 1.25 mm
2
or
more in size.
(4) For the robot power supply, use a grounding wire with grounding resistance of 100
Ω
or less.
(5) If the supply power source for the robot controller requires a leakage breaker, use a
high frequency-proof leakage breaker for inverters.
(6) When inserting a circuit breaker between the robot and the AC input power supply,
select the circuit breaker with breaking capacity higher than the following
specification.
Recommended circuit breaker example: CP33V/20 (Fuji Electric FA Components
& Systems Co., Ltd.)
Caution: Using a circuit breaker with breaking capacity lower than the following
specification may cause the circuit breaker to be shut down due to robot operation.
Breaking characteristics curve
Breaking current (Arms)
Circuit Breaker Characteristics
Breaking time (s)