Mitsubishi Electric MELSERVO-J3W Series, Instruction Manual

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APPENDIX
App. - 10
(3) Short circuit rating (SCCR: Short Circuit Current Rating)
Suitable For Use In A Circuit Capable Of Delivering Not More Than 100 kA rms Symmetrical Amperes,
500V Maximum.
(4) Flange
Mount the servo motor on a flange which has the following size or produces an equivalent or higher heat
dissipation effect.
Servo motor Flange size
[mm]
HG-AK HF-MP HF-KP HF-SP HC-UP HC-LP HF-JP
150 150 3
0136/0236/
0336
250 250 6 053/13/23 053/13/23
250 250 12 43 43
51/81
52/102
52/102 53/73/103
300 300 12 73 73
550 550 30 72
(5) Capacitor discharge time
The capacitor discharge time is as follows. To ensure safety, do not touch the charging section for 15
minutes after power-off. (except MR-J3W-0303BN6)
Servo amplifier Discharge time (min)
MR-J3W-22B 5
MR-J3W-44B 6
MR-J3W-77B/
MR-J3W-1010B
11
(6) Overload protection characteristics
An electronic thermal relay is built in the servo amplifier to protect the servo motor, servo amplifier and
servo motor power line from overloads. The operation characteristics of the electronic thermal relay are
shown below. It is recommended to use an unbalanced torque-generated machine, such as a vertical
motion shaft, so that unbalanced torque is not more than 70 of the rated torque. When closely mounting
MR-J3W-0303BN6, use it with 75 or less effective load torque, and with ambient temperature between 0
to 45 . When closely mounting MR-J3W-44B, use it with 90 or less of effective load torque.
Servo amplifier MR-J3W series have each solid-state servo motor overload protection. (The motor full load
current is 115 rated current.)