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Motor Controllers AC Variable Frequency Drives
Type Variflex
3
RVFF
Specifications are subjected to change without notice.
11
3.2 Considerations for peripheral equipment
Power Supply
MCC
B
Molded
Circuit
Breaker
Magnetic
Contactor
AC
Reactor
Fast
Acting
Fuse
Input Noise
Filter
F510
Inverter
Ground
Induction
Motor
Ground
Output Noise
Filter
~
~
~
Power supply:
⚫
!
Ensure that the correct voltage is applied to avoid damaging the
inverter.
Molded-case circuit breaker (MCCB) or fused disconnect:
⚫
A molded-case circuit breaker or fused disconnect must be installed
between the AC source and the inverter that conforms to the rated
voltage and current of the inverter to control the power and protect the
inverter.
⚫
!
Do not use the circuit breaker as the run/stop switch for the
inverter.
Ground fault detector/breaker:
⚫
!
Install a ground fault breaker to prevent problems caused by
current leakage and to protect personnel. Select current range up to
200mA, and action time up to 0.1 second to prevent high frequency
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 inverter.
AC line reactor for power quality:
⚫
When inverters are supplied by a high capacity power source (>
600KVA), an AC reactor can be installed on the input side of the
inverter to improve the power factor.
Install Fast Acting Fuse:
⚫
To protect peripheral equipment, install fast acting fuses in
accordance with the specifications in section
11.4 for peripheral
devices.
Input Noise filter:
⚫
A filter must be installed when there are inductive loads affecting the
inverter. The inverter meets EN55011 Class A, category C3 when the
Carlo Gavazzi special filter is used. See section 11.3 for peripheral
devices.
Inverter:
⚫
Output terminals T1, T2, and T3 are connected to U, V, and W
terminals of the motor. If the motor runs in reverse while the inverter
is set to run forward, swap any two terminals connections for T1, T2,
and T3.
⚫
!
To avoid damaging the inverter, do not connect the output
terminals T1, T2, and T3 to AC input power.
⚫
!
Connect the ground terminal properly. (400V series: Rg <10
.)
Output Noise filter:
⚫
An output noise filter may reduce system interference and induced
noise.
Motor:
⚫
If the inverter drives multiple motors the output rated current of the
inverter must be greater than the total current of all the motors.
RVFF
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