4
3. INSTRUCTIONS FOR WIRING
When the regenerative brake transistor is damaged, the wiring sequence
as shown in the following diagrams is recommended to prevent
overheating and burnout of the brake resistor.
•
Remove the link from across the PR-PX terminals of the inverter. (*1)
This disables (switches off) the built-in brake resistor. (Refer to the
instruction manual of the inverter for details.)
Note that the built-in brake resistor need not be removed. The leads of
the built-in brake resistor need not be disconnected from the terminals.
*1 When you use the FR-E500 series inverter, the FR-V500 series-7.5K or more
inverter and the FR-A500 series-11K or more inverter, you need not remove the
jumper since that inverter does not have the PX terminals. (Refer to the
instruction manual of the inverter.)
*2 For the 400V class power supply, install a voltage-reducing transformer.
*3 When using the (H)11K or 15K, install a thermal relay.
Refer to the following table for the thermal relay model number and to the
following diagram for connection.
Capacity
Thermal relay (OCR)
Contact Rating
11K/15K
TH-N20CXHZ-11A
AC110V 5A,
AC220V 2A
(AC11 class)
DC110V 0.5A,
DC220V 0.25A
(DC11 class)
H11K/H15K
TH-N20CXHZ-6.6A
MC
MC
T(*2)
MC
R
PX
PR
P
S
T
R
ON
OFF
B
C
F
<Example 1>
Power
Supply
Inverter
Disconnect jumper. (*1)
High-duty brake resistor
(FR-ABR)
Thermal relay
(OCR)(*3)
OCR
Contact
MC
Inverter
MC
T(*2)
MC
R
PX
PR
P
Disconnect jumper. (*1)
High-duty brake resistor
(FR-ABR)
Thermal relay
(OCR)(*3)
S
T
R
ON
OFF
OCR
Contact
Power
Supply
F
<Example 2>
To the inverter
P terminal
To the ABR
TH-N20
1/L
1
5/L
3
2/T
1
6/T
3
FR-ABR_UL.book 4 ページ ２００４年３月１６日 火曜日 午後３時５５分
