GE VAT20 Series Instruction Manual page 12

Application and precautions of Peripherals
Power supply
Molded-case
circuit breaker
or ground fault
interrupter
Electrical-
Mangnetic
contactor
AC reactor
for power
factor
improve-ment
VAT20
Inverter
Grounding
Motor
Grounding
Power Source
l
Apply the power source at the correct rated voltage to prevent
from damaging the inverter.
l
A Power Disconnect or Circuit breaker must be installed between
the AC power supply and the inverter.
Molded-case circuit breaker:
l
Utilize appropriate circuit breaker suitable for the rated voltage
and current ratings of the inverter to switch ON/OFF the power
supply to the inverter and as a protection for the inverter.
l
Do not operate the circuit breaker to switch ON or OFF the
inverter and operational sequence motor's run/stop.
Leakage circuit breaker:
l
Leakage circuit breaker should be added to prevent false
operation cause by leakage current and to ensure personnel
safety.
Magnetic Contact:
l
The Magnetic Contact can be omitted at ordinary operation. To
utilize external control, automatic restart, or breaking controller
the magnetic contact must be added at the primary side.
l
Do not operate the magnetic contact to switch ON or OFF the
inverter.
Power improvement AC Reactor:
l
If large capacity power source is applied (over 600KVA),
additional AC reactor may be added to improve power factor.
Inverter:
l
Power supply input terminals L1 and L2 is not differentiated on
phase sequence, they can be arbitrarily connected. Their
connection may be exchanged.
l
Output terminal T1, T2, and T3 should be connected to the U, V,
and W terminals of the motor respectively. If motor turns in
opposite direction of the inverter, simply exchanging two of three
wire connection may correct this problem.
l
Output terminal T1, T2, and T3 must not be connected to power
source to prevent from damaging inverter.
l
Grounding terminal Properly ground the grounding terminal in
compliance to local codes
10