Mitsubishi Electric FR-A800, Instruction Manual

Page: 109 / 1042

Installation and wiring Connection of stand-alone option units
FR-A800 2 - 79
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.
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.
I002406E, I002407E
Fig. 2-57: Protective circuit
Power
supply
voltage
High-duty brake
resistor brake resistor Thermal relay type
(Mitsubishi product)
Contact rating
200 V
FR-ABR-0.4K TH-N20CXHZ-0.7A
110 V AC 5A,
220 V AC 2A
(AC11 class)
110 V DC 0.5A,
220 V DC 0.25A
(DC11 class)
FR-ABR-0.75K TH-N20CXHZ-1.3A
FR-ABR-2.2K TH-N20CXHZ-2.1A
FR-ABR-3.7K TH-N20CXHZ-3.6A
FR-ABR-5.5K TH-N20CXHZ-5A
FR-ABR-7.5K TH-N20CXHZ-6.6A
FR-ABR-11K TH-N20CXHZ-11A
FR-ABR-15K TH-N20CXHZ-11A
FR-ABR-22K TH-N60-22A
400 V
FR-ABR-H0.4K TH-N20CXHZ-0.24A
FR-ABR-H0.75K TH-N20CXHZ-0.35A
FR-ABR-H1.5K TH-N20CXHZ-0.9A
FR-ABR-H2.2K TH-N20CXHZ-1.3A
FR-ABR-H3.7K TH-N20CXHZ-2.1A
FR-ABR-H5.5K TH-N20CXHZ-2.5A
FR-ABR-H7.5K TH-N20CXHZ-3.6A
FR-ABR-H11K TH-N20CXHZ-6.6A
FR-ABR-H15K TH-N20CXHZ-6.6A
FR-ABR-H22K TH-N20-9A
Tab. 2-44: Combination of resistor and thermal relay
R
PX
PR
P/+
(P3)
S/L2
T/L3
R/L1
MC
T
F
MC
MC
MC
S/L2
T/L3
R/L1
B
C
T
F
MC
MC
R
PX
PR
P/+
(P3)
Power
supply
Inverter
Thermal
relay
(OCR)
OFF ON
OCR
contact
Disconnect jumper
Example 1
Power
supply
Inverter
Thermal
relay
(OCR)
OFF ON
OCR
contact
Disconnect jumper
Example 2
FR-ABR FR-ABR
To the inverter
P/+ terminal
To the ABR