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When using the brake resistor (MRS type, MYS type, FR-ABR)
2.5 When using the brake resistor (MRS type, MYS type, FR-ABR)
It is recommended to configure a sequence, which shuts off power in the input side of the inverter by the external thermal
relay as shown below, to prevent overheat and burnout of the brake resistor (MRS type, MYS type) and high duty brake
resistor (FR-ABR) in case the regenerative brake transistor is damaged. (The brake resistor can not be connected to the
FR-D720-0.1K or 0.2K, FR-D720S-0.1K or 0.2K and FR-D710W-0.1K or 0.2K.)
∗1 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 relay when using a brake resistor whose capacity is 11K or more)
∗2 When the power supply is 400V class, install a step-down transformer.
Power
Supply
Voltage
Brake Resistor
Thermal Relay Type
(Mitsubishi product)
Contact Rating
100V,
200V
MRS120W200 TH-N20CXHZ-0.7A
110VAC 5A,
220VAC 2A(AC11 class)
110VDC 0.5A,
220VDC 0.25A(DC11class)
MRS120W100 TH-N20CXHZ-1.3A
MRS120W60 TH-N20CXHZ-2.1A
MRS120W40 TH-N20CXHZ-3.6A
MYS220W50
(two units in parallel)
TH-N20CXHZ-5A
Power
Supply
Voltage
Brake Resistor
Thermal Relay Type
(Mitsubishi product)
Contact Rating
100V,
200V
FR-ABR-0.4K TH-N20CXHZ-0.7A
110VAC 5A
220VAC 2A (AC11 class)
110VDC 0.5A,
220VDC 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
400V
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
NOTE
Brake resistor can not be used with the brake unit, high power factor converter, power supply regeneration converter,
etc.
Do not use the brake resistor with a lead wire extended.
Do not connect the resistor directly to the terminals P/+ and N/-. This could cause a fire.
MC
Inverter
MC
R
PR
P/+
S/L2
T/L3
R/L1
OFF
ON
OCR
Contact
Power supply
F
<Example 1>
MC
High-duty brake
resistor (FR-ABR)
T
Thermal relay
(OCR) (*1)
*2
Inverter
MC
R
PR
P/+
S/L2
T/L3
R/L1
OFF
ON
B
C
Power supply
F
<Example 2>
MC
High-duty brake
resistor (FR-ABR)
OCR
Contact
T
MC
Thermal relay
(OCR) (*1)
*2
To the inverter
terminal P/+
To a resisto
TH-N20
1/L1 5/L3
2/T1 6/T3
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