YASKAWA CIMR-F7A Instruction Manual page 58

Varispeed f7 general purpose inverter

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Breaking Unit Application Precautions

When using a Braking Resistor Unit, create a sequence to detect overheating of the braking resistor and turn

OFF the power supply to the Inverter.

Braking resistor overheat-

ing contacts (Thermal pro-

tector contacts)

Braking Unit #1

Cooling fin overheating con-

tacts (thermostat contacts)

Fig 2.15 Connecting Braking Units in Parallel

Three-phase power:

200 to 240 V, 50/60 Hz or

380 to 480 V, 50/60 Hz

Overload relay trip contact

of Braking Resistor Unit

* Use a transformer with 200 and 400 V outputs for the power 400 V Inverter.

Fig 2.16 Power Shutoff Sequence

Braking resistor overheat-

ing contacts (Thermal pro-

tector contacts)

Braking Unit #2

Cooling fin overheating con-

tacts (thermostatic contacts)

Fault contacts

Braking resistor overheat-

ing contacts (Thermal pro-

tector contacts)

Braking Unit #3

Cooling fin overheating con-

tacts (thermostatic contacts)

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