4.4.5 Typical Main Circuit Wiring Examples - YASKAWA Sigma-V Series User Manual

4.4.5
Typical Main Circuit Wiring Examples
• Be sure to observe the following precautions when wiring the main circuit termi-
nals and connectors on a multi-winding drive unit, SERVOPACK, or converter.
• Do not turn ON the power to a multi-winding drive unit, SERVOPACK, or converter
until all wiring, including the wiring to the main circuit connector, has been com-
pleted.
• Remove detachable main circuit terminals from the multi-winding drive unit, SERVO-
PACKs, and converters prior to wiring.
• Insert only one power line per opening in the main circuit terminals.
• Make sure that no part of the core wire comes into contact with (i.e., short-circuits)
adjacent wires.
CAUTION
• Use a molded-case circuit breaker (1QF) or fuse to protect the
main circuit.
The SERVOPACKs and the converters connect directly to a com-
mercial power supply; they are not isolated by a transformer or
other device.
Always use a molded-case circuit breaker (1QF) or fuse to pro-
tect the servo system from accidents involving different power
system voltages or other accidents.
• Install a ground fault detector.
The multi-winding drive unit, SERVOPACKs, and converters do
not have a built-in protective circuit for grounding.
To configure a safer system, install a ground fault detector
against overloads and short-circuiting, or install a ground fault
detector combined with a molded-case circuit breaker.
• Do not frequently turn power ON and OFF.
• Frequently turning power ON and OFF causes elements
inside the multi-winding drive unit, SERVOPACKs, and con-
verters to deteriorate. Do not use the system with an applica-
tion that requires frequently turning power ON and OFF.
• After the actual operation starts, the allowable interval for turn-
ing power ON and OFF is one hour or longer.
4.4 Main Circuit Wiring
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