Chapter 4 Wiring
4-1
4.1 Wiring
Do the wiring of inverter and then check the wiring of main circuit and control circuit
before starting it. Read through the checking list as below.
Checking List
Inverter, Peripherals, Option card
Is the inverter supplied in the form as ordered?
Are the type and numbers of peripherals (Resistance, DC reactor, Noise
filter, etc.) supplied as ordered?
Is the type of option supplied as supplied?
Place of the inverter to be installed and how to install it
Is the inverter installed on a right place in a right way?
Power voltage, Output voltage
Is power voltage within the range of inverter input voltage specified
?
Does the rated output comply with the inverter output specification
?
Is the rating done properly
?
Main Circuit Wiring
Is the power input using the circuit breaker
?
Is the rating of the circuit breaker done properly
?
Is the power wiring input properly to the inverter input terminal? [If the
input power is connected with the input terminal (U, V, W) it may cause
damage to the inverter]
Is the motor wiring connected with the inverter output terminal in a proper
phase sequence? (Otherwise, the motor will be rotated adversely.)
Is 600V vinyl insulation wire adopted for the power and motor wires
?
Is the main circuit wire in a proper size
?
Is the ground line installed in a proper way
?
Are the screws of the main circuit terminal and the ground terminal
fastened tightly
?
In the event several motors are operated with one inverter, does each
motor have a overload protecting circuit
?
In the event it adopts braking resistance or braking resistance unit, is an
electronic contactor installed at the inverter power side so as to isolate
the inverter from the power by protecting the resistance from overload
?
Isn't power condenser, surge killer, or radio noise filter connected with the
output side?
