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13. SERVO AMPLIFIERS WITH A LARGE CAPACITY (30k TO 55kW)
13.9.5 No-fuse breakers, fuses, magnetic contactors.
Always use one no-fuse breakers and one magnetic contactor with one drive unit.
No-fuse breaker Fuse
Converter unit Drive unit
Power factor
improving DC
reactor is not used
Power factor
improving DC
reactor is used
Class
Current
[A]
Voltage
AC [V]
Magnetic
contactor
MR-J3-DU30KB 400A frame 250A 225A frame 225A 450 S-N150
MR-J3-CR55K
MR-J3-DU37KB 400A frame 300A 400A frame 300A 500
250
S-N180
MR-J3-DU30KB4 225A frame 150A 225A frame 125A 225 S-N95
MR-J3-DU37KB4 225A frame 175A 225A frame 150A
T
250 S-N125
MR-J3-CR55K4
MR-J3-DU45KB4 225A frame 225A 225A frame 175A 350 S-N150
MR-J3-DU55KB4 400A frame 250A 225A frame 225A 400
600
S-N180
13.9.6 Power factor improving DC reactor
The input power factor is improved to about 95%.
[Unit: mm]
Converter unit Drive unit
Power factor improving
DC reactor
W D H W1 X
Terminal
screw
Mass
[kg (lb)]
MR-J3-DU30KB MR-DCL30K
MR-J3-CR55K
MR-J3-DU37KB MR-DCL37K
255 215 80 232 M12
9.5
(20.94)
MR-J3-DU30KB4 MR-DCL30K-4 205 75 175
6.5
(14.33)
MR-J3-DU37KB4 MR-DCL37K-4 225 197
7
(15.43)
MR-J3-CR55K4
MR-J3-DU45KB4 MR-DCL45K-4 240
200
212
7.5
(16.54)
MR-J3-DU55KB4 MR-DCL55K-4
135
260 215
80
232
M8
9.5
(20.94)
H or less
X
D or less
Terminal cover
Terminal screw
Terminal block (M3.5 screw)
For thermal sensor
P
1 P2
Approx. W1
W or less
Mounting hole
for M8
1.5
1.5