Mitsubishi Electric FR-A720-00030-NA Instruction Manual page 53

Connection of stand-alone option units
FR-A720-00460, FR-A740-00230 and 00310
Connect the brake resistor
across terminals P/+ and PR.
Brake resistor
* Do not remove the jumper across terminal P/+ and P1 except when connecting a DC reactor.

When the regenerative brake transistor is damaged, the following sequence is recommended to prevent overheat
and burnout of the brake resistor.
<Example 1>
MC
Power
Supply
T
F
MC
OFF
ON
OCR
Contact
MC
FR-A720-00460 (FR-A740-00230) or more
*1 Since the
*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
FR-A720-00460 (FR-A740-00230) or more
relay when using the
Power Supply High-Duty Brake
Voltage Resistor
FR-ABR-0.4K
FR-ABR-0.75K
FR-ABR-2.2K
FR-ABR-3.7K
200V FR-ABR-5.5K
FR-ABR-7.5K
FR-ABR-11K
FR-ABR-15K
FR-ABR-22K
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
CAUTION
 The brake resistor connected should only be the dedicated brake resistor.
 The jumper across terminals PR and PX (FR-A720-00330 (FR-A740-00170) or less) must be disconnected before connecting
the dedicated brake resistor. Doing so may damage the inverter.
 Brake resistor cannot be used with the brake unit, high power factor converter, power supply regeneration converter, etc.
42
Jumper *
Terminal P/+
Terminal PR
Thermal High-duty
relay brake resistor
(OCR)(*2) (FR-ABR)
Inverter
R/L1 P/+
S/L2 PX
T/L3 PR
Disconnect jumper. (*1)
Thermal Relay Type
(Mitsubishi product)
TH-N20CXHZ-0.7A
TH-N20CXHZ-1.3A
TH-N20CXHZ-2.1A
TH-N20CXHZ-3.6A
TH-N20CXHZ-5A
TH-N20CXHZ-6.6A
TH-N20CXHZ-11A
TH-N20CXHZ-11A
TH-N60-22A
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
FR-A720-00610 to 00900, FR-A740-00380 and 00440
Connect the brake resistor
across terminals P/+ and PR.
Jumper
Brake resistor
<Example 2>
R
Power
Supply
T
F
MC
OFF
ON
MC
inverter is not provided with the PX terminal, a jumper is not need to be removed.
)
Contact Rating
110V 5AAC,
220V 2AAC(AC-11 class)
110V 0.5ADC,
220V 0.25ADC(DC-11 class)
Terminal P/+
*
Thermal
relay
Inverter
MC
(OCR)(*2)
R/L1 P/+
S/L2 PX
T/L3 PR
Disconnect jumper. (*1)
B
C
OCR
Contact
1/L
1
2/T
1
To the inverter
P/+ terminal
Terminal PR
High-duty
brake resistor
(FR-ABR)
R
5/L
3
TH-N20
6/T
3
To the ABR