Mitsubishi Electric FR-A740-00023 Instruction Manual page 49

When the regenerative brake transistor is damaged, the following sequence is recommended to prevent overheat
and burnout of the brake resistor.
<Example 1>
MC
R/L1
Power
S/L2
Supply
T/L3
T
F
OFF
ON
MC
OCR
Contact
MC
00310 or more
*1 Since the inverter is not provided with the PX terminal, a jumper is not need to be removed.
*2 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
00310 or more
relay when using the
Power Supply High-Duty Brake
Voltage Resistor
FR-ABR-H0.4K
FR-ABR-H0.75K
FR-ABR-H1.5K
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
Thermal High-duty
relay brake resistor
(OCR)(*2) (FR-ABR)
Inverter
P/+
R
PX
PR
Disconnect jumper. (*1)
)
Thermal Relay Type
(Mitsubishi product)
TH-N20CXHZ-0.24A
TH-N20CXHZ-0.35A
TH-N20CXHZ-0.9A
TH-N20CXHZ-1.3A
TH-N20CXHZ-2.1A
TH-N20CXHZ-2.5A
TH-N20CXHZ-3.6A
TH-N20CXHZ-6.6A
TH-N20CXHZ-6.6A
TH-N20-9A
Connection of stand-alone option units
<Example 2>
Inverter
MC
R/L1
Power
S/L2
Supply
T/L3
T
F
B
OFF
ON
MC C
OCR
MC Contact
Contact Rating
110V 5AAC,
220V 2AAC(AC-11 class)
110V 0.5ADC,
220V 0.25ADC(DC-11 class)
Thermal High-duty
relay brake resistor
(OCR)(*2) (FR-ABR)
P/+
R
PX
PR
Disconnect jumper. (*1)
1/L 5/L
1 3
TH-N20
2/T 6/T
1 3
To the inverter To the ABR
P/+ terminal
39
2