MA7200 PLUS Operating Manual
TECO – Westinghouse Motor Company Peripheral Power Devices
5.0 Peripheral Power Devices Overview
The following Fig. 5.0.1describes some of the precautions that should be followed when selecting peripheral power
devices.
MCC
B
Power supply:
Make sure 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. (See Section 3.3)
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. (See Section 3.3)
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 (above
600KVA) power source, an AC reactor can be connected to
improve the power factor. Refer to
Sec. 5.1
.
Install Fast Acting Fuse:
To protect peripheral equipment, install fast acting fuses in
accordance with the specifications in
Sec. 5.2
.
Input Noise filter:
When used with TECO specified Input Noise Filter, the
MA7200 PLUS will comply with EN55011 class A regulation. Refer
to
Sec. 5.3A.
A filter must be installed when there are inductive loads
affecting the inverter.
Inverter:
The input power supply can be connected to any terminal R/L1,
S/L2, T/L3 on the terminal block. Connect output terminals T1, T2,
and T3 are connected to U, V, and W terminals of the motor.
Securely connect the ground terminal E to the site ground.
Output Noise filter:
Install an Output Noise Filter between the MA7200 PLUS and
the Induction Motor to eliminate noise transmitted between the
power line and the inverter. Refer to
Sec. 5.3B.
Induction Motor:
When multiple motors are driven in parallel with an inverter, the
inverter rated current should be at least 1.1 times the total motor
rated current.
The inverter and the motor must be grounded separately.
Fig. 5.0.1 Peripheral Power Devices Overview