Mitsubishi Electric FR-A820-00046 Instruction Manual page 109

Installation and wiring
Connection of the dedicated external brake resistor (FR-ABR)
The FR-ABR is applicable to FR-A820-01250(22K) or lower and FR-A840-00620(22K) or lower.
Set parameters as below.
● Pr. 30 "Regenerative function selection" = 1
● Pr. 70 "Special regenerative brake duty" = 7.5K or lower: 10 %, 11K or higher: 6 %
(Refer to page 5-675.)
● 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
OFF
Fig. 2-57:
Since the FR-A820-00630(11K) or higher and FR-A840-00310(11K) or higher are not provided with
the PX terminal, a jumper need not to be removed.
Refer to the table below for the thermal relay types for each capacity. Refer to the diagram below
for the connection. Always install a thermal relay when using a brake resistor whose capacity is11K
or higher.
Power
supply
voltage
200 V
400 V
Tab. 2-44:
FR-A800
Inverter
MC
R/L1 P/+
(P3)
S/L2
T/L3
PX
T
PR
F
MC
ON
OCR
contact
MC
Protective circuit
High-duty brake
resistor brake resistor
FR-ABR-0.4K
FR-ABR-0.75K
FR-ABR-2.2K
FR-ABR-3.7K
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
FR-ABR-H5.5K
FR-ABR-H7.5K
FR-ABR-H11K
FR-ABR-H15K
FR-ABR-H22K
Combination of resistor and thermal relay
Thermal
Example 2
relay
FR-ABR
(OCR)
R
Power
supply
F
Disconnect jumper
OFF
Thermal relay type
Contact rating
(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
110 V AC 5A,
220 V AC 2A
TH-N60-22A
(AC11 class)
TH-N20CXHZ-0.24A
110 V DC 0.5A,
TH-N20CXHZ-0.35A
220 V DC 0.25A
(DC11 class)
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
MC
Inverter
R/L1 P/+
(P3)
S/L2
T/L3
PX
T
PR
B
Disconnect jumper
MC
ON
C
OCR
contact
MC
To the inverter
P/+ terminal
Thermal
relay
FR-ABR
(OCR)
R
I002406E, I002407E
To the ABR
2 - 79