Selection Of No-Fuse Breakers, Fuses, And Magnetic Contactors (Example); Mr-J2S-Series, No-Fuse Breakers And Magnetic Contactors (Recommended); Mr-J4-Series, No-Fuse Breakers, Fuses, And Magnetic Contactors (Recommended) - Mitsubishi Electric MELSERVO-J2S Series Transition Handbook

Part 5: Review on Replacement of MR-J2S-30 kW or Higher Capacity Models with MR-J4-DU_

5.3 Selection of No-Fuse Breakers, Fuses, and Magnetic Contactors (example)

5.3.1 MR-J2S-series, no-fuse breakers and magnetic contactors (recommended)

Always use one molded-case circuit breaker/one magnetic contactor with one servo amplifier.
Servo amplifier
MR-J2S-30KA/B
MR-J2S-37KA/B
MR-J2S-30KA4/B4
MR-J2S-37KA4/B4
MR-J2S-45KA4/B4
MR-J2S-55KA4/B4

5.3.2 MR-J4-series, no-fuse breakers, fuses, and magnetic contactors (recommended)

(1) For main circuit power supply
Always use one molded-case circuit breaker and one magnetic contactor with one converter unit. When
using a fuse instead of the molded-case circuit breaker, use the one having the specifications given in
this section.
Converter
Drive unit
unit
MR-J4-DU30K_
MR-CR55K
MR-J4-DU37K_
MR-J4-DU30K_4 100 A frame 100 A
MR-J4-DU37K_4 125 A frame 125 A
MR-CR55K4
MR-J4-DU45K_4 225 A frame 150 A
MR-J4-DU55K_4 225 A frame 175 A
Note 1. To comply with the IEC/EN/UL/CSA standard, refer to App. 2.
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.
Converter unit
Power factor improving
DC reactor not used
400 A frame 250 A
MR-HP30KA
400 A frame 300 A
225 A frame 150 A
225 A frame 175 A
MR-HP55KA4
225 A frame 225 A
400 A frame 250 A
Molded-case circuit breaker (Note 1)
Frame, rated current
Power factor Power factor
improving DC improving DC
reactor not used reactor used
225 A frame 175 A 225 A frame 150 A
225 A frame 225 A 225 A frame 175 A
100 A frame 80 A
100 A frame 100 A
125 A frame 125 A
225 A frame 150 A
Molded-case circuit breaker
Current
Power factor improving
DC reactor used
225 A frame 225 A
400 A frame 300 A
225 A frame 125 A
225 A frame 150 A
225 A frame 175 A
225 A frame 225 A
Voltage
Class
AC [V]
240
480
5 - 37
Magnetic
Voltage
contactor
AC
240 V
600Y/
347 V
Fuse
Current Voltage
[A] AC [V]
300
300
400
175
T
200
600
300
300
S-N150
S-N180
S-N95
S-N125
S-N150
S-N180
Magnetic
contactor
(Note 2)
S-N150
S-N180
S-N65
S-N80
S-N95
S-N150