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Precautions for peripheral applications
Power
Moulded-case
Circuit breaker
Magnetic
contactor
AC reactor
for power
improvement
VSC48
Variable
speed drive
Motor
Fig. 9
50
Wiring notes
Power supply:
• Make sure the correct voltage is applied to avoid damag-
ing the VSD.
• A moulded-case circuit breaker must be installed between
the AC source and the VSD.
Moulded-case circuit breaker:
• Use a moulded-case circuit breaker that conforms to the
rated voltage and current of the VSD to control the power
ON/OFF and protect the VSD.
• Do not use the VSD as the switch for the run/stop switch.
Leakage breaker:
• Install a leakage breaker to prevent error operation
caused by electric leakage and to protect operators.
• Setting current should be 200 mA or above and the oper-
ating time at 0.1 second or longer to prevent malfunction.
Magnetic contactor:
• Normal operations do not need a magnetic contactor. But
a contactor has to be installed on the primiary side when
performing functions such as external control and auto
restart after power failure, or when using brake controller.
• Do not use the magnetic contactor as the run/stop switch
for the VSD.
AC reactor for power improvement:
• When VSDs below 400 V 15 kW are supplied with a high-
capacity (above 600 kVA) power source an AC reactor
can be connected to improve the power performance.
VSD:
• Input power terminals L1, L2, and L3 can be used in any
sequence regardless of phases.
• Output terminals T1, T2, and T3 are connected to the
motor's U, V, and W terminals. If the motor is reversed
while the VSD is forward, just swap any two of T1, T2, and
T3.
• To avoid damaging the VSD, do not connect the output ter-
minals T1, T2, and T3 to AC power.
• Connect the ground terminal properly. 400 V series:
Ω
<10
.
Emotron AB 01-3990-11r3
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