Mitsubishi Electric FR-A700 Instruction Manual page 85

Wiring
When the regenerative brake transistor is damaged, the following sequence is recommended
to prevent overheat and burnout of the brake resistor.
Example 1
Power
supply
Fig. 3-33: Protective circuit
Since the 00310 or more inverter is not provided with the PX terminal, a jumper is not need
to be removed.
Refer to the table below for the type number of each capacity of thermal relay and the diagram
below for the connection. (Always install a thermal relay when using the 00310 or more.)
Power Supply Voltage
Tab. 3-24: Combination of resistor and thermal relay
To the inverter P/+
terminal
FR-A700 EC
Inverter
MC
OCR
ON
contact
MC
OFF
MC
High-Duty Brake
Resistor
FR-ABR-H0.4K
FR-ABR-H0.75K
FR-ABR-H2.2K
FR-ABR-H3.7K
400V FR-ABR-H5.5K
FR-ABR-H7.5K
FR-ABR-H11K
FR-ABR-H15K
FR-ABR-H22K
Connection of stand-alone option units
Example 2
Thermal
High-duty
relay
brake resistor
(OCR)
Power
supply
Disconnect jumper
OFF
Thermal Relay Type
TH-N20CXHZKP-0.24A
TH-N20CXHZKP-0.35A
TH-N20CXHZKP-0.9A
TH-N20CXHZKP-1.3A
TH-N20CXHZKP-2.1A
TH-N20CXHZKP-2.5A
on request
on request
on request
Fig. 3-34:
Connection of th thermal relay
To the brake
resistor
Thermal
Inverter
relay
MC
(OCR)
Disconnect jumper
OCR
ON
contact
MC
MC
Contact Rating
110V/5A AC,
220V/2A AC (AC 11 class),
110V/0.5A DC,
220V/0.25A DC (DC 11 class)
High-duty
brake resistor
I001457E
I001458E
3 - 47