Emotron AB 01-3991-11r2 Wiring notes 39
Precautions for peripheral applications:
Power
Moulded-case
Circuit breaker
Magnetic
contactor
AC reactor
for power
improvement
Variable
Motor
speed drive
Power supply:
• Make sure the correct voltage is applied to avoid damaging the
VSD.
• A moulded-case circuit breaker or fused disconnect 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 and protect
the VSD.
• Do not use the circuit breaker as the run/stop switch for the
VSD.
Fuse:
• A suitable fuse should be installed with VSD rated voltage and
current when a MCCB is not being used.
Earth Leakage circuit breaker:
• Install a leakage breaker to prevent problems caused by cur-
rent leakage and to protect personnel. Select current range up
to 200mA, and action time up to 0.1 second to prevent high fre-
quency failure.
Magnetic contactor:
• Normal operations do not need a magnetic contactor. When
performing functions such as external control and auto restart
after power failure, or when using a brake controller, install a
magnetic contactor.
• Do not use the magnetic contactor as the run/stop switch for
the VSD.
AC Line Reactor for power quality:
• When VSDs are supplied with a high capacity (above 600 kVA)
power source, a AC reactor can be connected to improve the PF.
Input noise filter:
• A filter must be installed when there are inductive loads affect-
ing the VSD.
VSD:
• 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
set to run forward, just swap any two of T1, T2, and T3.
• To avoid damaging the VSD, do not connect the output termi-
nals T1, T2, and T3 to AC input power.
• Connect the ground terminal properly. (230 V series: Rg <100;
460 V series: Rg <10.): <10
Ω.
VSAxx
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