Mr-J4W2-_B Servo Amplifier, No-Fuse Breakers, Fuses, Magnetic Contactors - Mitsubishi Electric MELSERVO-J3 Series Manual

Part 7: Review on Replacement of Optional Peripheral Equipment

4.3.4 MR-J4W2-_B servo amplifier, no-fuse breakers, fuses, magnetic contactors

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.
When using a combination of the rotary servo motor select a molded-case circuit breaker, a fuse or a
magnetic contactor tentatively, assuming one type of the servo motors are used for two axes. After the
tentative selections are made for all types of the servo motors, use the largest among all molded-case circuit
breakers, fuses, or magnetic contactors.
(1) For main circuit power supply
CAUTION
(a) For MR-J4W2-_B
Total output of rotary servo motors
300 W or less
From over 300 W to 600 W
From over 600 W to 1 kW
From over 1 kW to 2 kW
Note 1. In order for the servo amplifier to comply with the UL/CSA standard, see the applicable "Servo Amplifier Instruction
Manual".
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.
3. When not using the servo amplifier as an EC/EN/UL/CSA standard compliant product, molded-case circuit breaker
of 30 A frame can be used.
4. S-N18 can be used when auxiliary contact is not required.
5. A molded-case circuit breaker will not change to select regardless of use of a power factor improving AC reactor.
6. Use a molded-case circuit breaker having the operation characteristics equal to or higher than Mitsubishi Electric
general-purpose products.
(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.
Servo amplifier
MR-J4W2-22B
MR-J4W2-44B
MR-J4W2-77B
MR-J4W2-1010B
Note. When not using the servo amplifier as an EC/EN/UL/CSA standard compliant product, molded-case circuit breaker of
30 A frame can be used.
To prevent the servo amplifier from smoke and a fire, select a molded-case circuit
breaker which shuts off with high speed.
Always use one molded-case circuit breaker and one magnetic contactor with one
servo amplifier.
Molded-case circuit breaker
Frame, rated current
50 A frame 5 A (Note 3)
50 A frame 10 A (Note 3)
50 A frame 15 A (Note 3)
50 A frame 20 A (Note 3)
Molded-case circuit breaker
Voltage AC
Frame, rated current
50 A frame 5 A (Note)
(Note 5, 6)
Voltage
AC
[V]
240
Fuse (Class T)
Voltage AC
Current [A]
[V]
240 1
7 - 26
Fuse
Voltage
(Note 1) Current
AC
Class [A]
[V]
15
20
20
T 300
30
Fuse (Class K5)
Voltage AC
Current [A]
[V]
300 1
(Note 2)
Magnetic
contactor
S-N10
S-T10
S-N20
(Note 4)
S-T21
[V]
250