Mitsubishi Electric FR-A820-00046 (0.4K) Instruction Manual page 99

• Pr.70 Special regenerative brake duty = 10% (for 7.5K or lower) or 6% (for 11K or higher)
(Refer to page 689.)
• 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
*1 Since the FR-A820-00630(11K) or higher and FR-A840-00310(11K) or higher are not provided with terminal PX, a jumper need not to be
removed.
*2 Refer to the following table for the thermal relay models for each capacity. Refer to the following diagram for the connection. (Always install a
thermal relay when using a brake resistor whose capacity is 11K or higher.)
Power High duty
supply brake resistor
voltage model
FR-ABR-0.4K
FR-ABR-0.75K
FR-ABR-2.2K
FR-ABR-3.7K
200 V 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
400 V
FR-ABR-H5.5K
FR-ABR-H7.5K
FR-ABR-H11K
FR-ABR-H15K
FR-ABR-H22K
 Connection of a brake resistor other than the FR-ABR
A brake resistor can be used with the FR-A820-01250(22K) or lower and the FR-A840-01800(55K) or lower.
98
2. INSTALLATION AND WIRING
2.10 Connection of stand-alone option units
Thermal
relay
(OCR)(∗2)
Inverter
FR-ABR
R/L1 P/+
R
(P3)
S/L2
T/L3
PX
PR
Disconnect jumper. (∗1)
Thermal relay
model
(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
<Example 2>
Power
Supply
T
F
MC
OFF ON
MC
Contact rating
110 VAC 5 A,
220 VAC 2 A (AC11 class),
110 VDC 0.5 A,
220 VDC 0.25 A (DC11
class)
Thermal
relay
MC Inverter
(OCR)(∗2)
R/L1 P/+
(P3)
S/L2
T/L3
PX
PR
B
Disconnect jumper. (∗1)
C
OCR
Contact
1/L 5/L
1 3
TH-N20
2/T 6/T
1 3
To the inverter To the FR-ABR
P/+ terminal
FR-ABR
R