Molded-Case Circuit Breakers, Fuses, Magnetic Contactors (Recommended); Power Factor Improving Dc Reactor - Mitsubishi Electric MELSERVO-J4 Instruction Manual

9. OPTIONS AND PERIPHERAL EQUIPMENT

9.7 Molded-case circuit breakers, fuses, magnetic contactors (recommended)

(1) For main circuit power supply
Always use one molded-case circuit breaker and one magnetic contactor with one servo amplifier. When
using a fuse instead of the molded-case circuit breaker, use the one having the specifications given in
this section.
MR-J4-60_4(-RJ)
MR-J4-100_4(-RJ)
MR-J4-200_4(-RJ)
MR-J4-350_4(-RJ)
MR-J4-500_4(-RJ)
MR-J4-700_4(-RJ)
MR-J4-11K_4(-RJ)
MR-J4-15K_4(-RJ)
MR-J4-22K_4(-RJ)
Note 1. When having the servo amplifier comply with the UL/CSA standard, refer to appendix 1.
(2) For control circuit power supply
When the wiring for the control circuit power supply (L11, L21) is thinner than that for the main circuit
power supply (L1, L2, L3), install an overcurrent protection device (molded-case circuit breaker or fuse)
to protect the branch circuit.
Molded-case circuit breaker (Note)
Servo amplifier
Frame, rated current
MR-J4-60_4(-RJ)
MR-J4-100_4(-RJ)
MR-J4-200_4(-RJ)
MR-J4-350_4(-RJ)
MR-J4-500_4(-RJ) 30 A frame 5 A
MR-J4-700_4(-RJ)
MR-J4-11K_4(-RJ)
MR-J4-15K_4(-RJ)
MR-J4-22K_4(-RJ)
Note. When having the servo amplifier comply with the UL/CSA standard, refer to appendix 1.

9.8 Power factor improving DC reactor

The following shows the advantages of using power factor improving DC reactor.
It improves the power factor by increasing the form factor of the servo amplifier's input current.
It decreases the power supply capacity.
The input power factor is improved to about 85%.
As compared to the power factor improving AC reactor (FR-HAL-H), it decreases the loss.
When connecting the power factor improving DC reactor to the servo amplifier, always disconnect P3 and
P4. If it remains connected, the effect of the power factor improving DC reactor is not produced.
When used, the power factor improving DC reactor generates heat. To release heat, therefore, leave a 10
cm or more clearance at each of the top and bottom, and a 5 cm or more clearance on each side.
Molded-case circuit breaker (Note 1)
Servo amplifier
Frame, rated current
30 A frame 5 A
30 A frame 10 A
30 A frame 15 A
30 A frame 20 A
30 A frame 20 A
30 A frame 30 A
50 A frame 50 A
60 A frame 60 A
100 A frame 100 A
2. Use a magnetic contactor with an operation delay time (interval between current being applied to
the coil until closure of contacts) of 80 ms or less.
Voltage AC [V]
480
Voltage AC
Class
[V]
480
Fuse (Class T)
Current [A] Voltage AC [V]
1 600
9 - 41
Fuse
Current Voltage
[A] AC [V]
10
15
25
35
T 600
50
65
100
150
175
Fuse (Class K5)
Current [A] Voltage AC [V]
1
Magnetic
contactor
(Note 2)
S-N10
S-N18
S-N20
S-N25
S-N35
S-N50
600