Chapter 4 Option and Peripheral Devices
4–15
DANGER
Install independent no-fuse breakers and contactors as the SVJ2 main circuit
power supply if the total current capacity exceeds 60A when the power supply
is shared between the converter and a large capacity SPJ2 spindle amplifier.
No-fuse breakers may not operate for short-circuits in small capacity amplifiers
if they are shared with a large capacity unit, and this could cause fires. Select
a capacity of NF60 or less for the intelligent servomotor and SVJ2 servo
amplifier.
4-2-3 Selection of contactor
Select the contactor based on section "(1) Selection from rush current" when the system connected to
the contactor to be selected is intelligent servomotor, an MDS-B-SVJ2 servo amplifier and 3.7kW or
less MDS-B-SPJ2 spindle amplifier.
When a converter unit or 5.5kW or more MDS-B-SPJ2 spindle amplifier is included, calculate both
the capacities in sections "(1) Selection from rush current" and "(2) Selection from input current", and
select the larger of the two capacities.
(1) Selection from rush current
Use the following table to select the contactors so the total rush current for each unit does not
exceed the closed circuit current amount.
Rush current table
Intelligent servomotor
HS-RF43, HS-RF73
HS-SF52, HS-SF53
HS-MF23
HS-SF102, HS-SF103
HS-SF202
Rush current 45A 100A
MDS-B-SVJ2
MDS-B-SVJ2-01
MDS-B-SVJ2-03
MDS-B-SVJ2-04
MDS-B-SVJ2-06 MDS-B-SVJ2-07
MDS-B-SVJ2-10
MDS-B-SVJ2-20
Rush current 45A 50A 70A 100A
MDS-B-SPJ2
MDS-B-SPJ2-02
MDS-B-SPJ2-04
MDS-B-SPJ2-075
MDS-B-SPJ2-15
MDS-B-SPJ2-22
MDS-B-SPJ2-37
MDS-B-SPJ2-55
MDS-B-SPJ2-75
MDS-B-SPJ2-110
Rush current 45A 50A 100A 15A
Converter unit
MDS-A-CR-10 to MDS-A-CR-90
MDS-A/B-CV-37 to MDS-A/B-CV-75
MDS-A/B-CV-110
Rush current 15A 40A
Contactor selection table 1
Contactor closed current
capacity
(Total rush current)
110A 200A 220A 300A 400A 550A 650A 850A
Recommended contactor
(Mitsubishi Electric Corp.:
Option part)
S-N10
AC200V
S-N18
AC200V
S-N20
AC200V
S-N25
AC200V
S-N35
AC200V
S-K50
AC200V
S-K65
AC200V
S-K80
AC200V
Special order part: This part is not handled by the NC Dept. Marketing Section or dealer.
The contactor is selected for the MDS-B-SVJ2-10 with three HS-SF102 axes and one
MDS-B-SPJ2-37 axis connected.
< Selection only from rush current >
(HS-SF102 × 3 axes rush current) + (SPJ2-37 × 1 axis rush current)
= 3 × 100A + 1 × 100A = 400A
Therefore, S-N35 200VAC is selected.
(Example 1)
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