Mitsubishi Electric FR-E700 Instruction Manual page 64
Frequency inverter
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Also See for FR-E700:
- Instruction manual (608 pages) ,
- Basic instruction manual (149 pages) ,
- Installation manuallines (38 pages)
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Connection of stand-alone option units
It is recommended to configure a sequence, which shuts off power in the input side of the in-
verter by the external thermal relay as shown below, to prevent overheat and burnout of the high
duty brake resistor (FR-ABR) in case the regenerative brake transistor is damaged. (The brake
resistor can not be connected to the FR-E720S-008 or 015.)
Example 1
Power
supply
Fig. 3-21: Protection circuits
Refer to Tab. 3-15 for the type number of each capacity of thermal relay and the diagram for
the connection.
When the power supply is 400V class, install a step-down transformer.
Power Supply
Voltage
230V
400V
Tab. 3-15: Resistor and thermal relay combination
To the inverter +
3 - 30
Inverter
Thermo relay
(OCR)
T
ON
OFF
OCR
contact
High-duty Brake
Type
Resistor
MRS120W200
MRS120W100
MRS120W60
MRS120W40
FR-ABR-0.4K
FR-ABR-0.75K
FR-ABR-2.2K
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
terminal
Example 2
Brake
restistor
Power
supply
Thermal Relay Type
(Mitsubishi Product)
TH-N20CXHZ-0.7A
TH-N20CXHZ-1.3A
TH-N20CXHZ-2.1A
TH-N20CXHZ-3.6A
TH-N20CXHZ-0.7A
TH-N20CXHZ-1.3A
TH-N20CXHZ-2.1A
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
Fig. 3-22:
Connecting the thermal relay
To a resistor
Inverter
Thermo relay
(OCR)
T
ON
OFF
OCR
contact
Contact Rating
110V AC/5A
220V AC/2A (AC 11 class),
110V DC/0.5A
220V DC/0.25A (DC 11 class)
Wiring
Brake
restistor
I002043E
I001458E
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