Mitsubishi Electric Melservo-J3 Series MR-J3-B Instruction Manual page 371

13. SERVO AMPLIFIERS WITH A LARGE CAPACITY (30k TO 55kW)
(4) Connection of the regenerative option
Always supply 1-phase 200V and 400V respectively to the cooling fan. The cooling fan specifications are as
follows.
The regenerative option generates heat of 100
dissipation, installation position, used wires, etc. to place the option. For wiring, use flame-resistant wires or
make the wires flame-resistant and keep them away from the regenerative option. The G3 and G4 terminals act
as a thermal sensor. G3-G4 are opened when the regenerative option overheats abnormally.
Always twist the wires for connection with the converter unit and connect the wires within the overall distance of
5m.
(a) MR-RB139 MR-RB136-4
Power factor improving
DC reactor (Option)
(Note 3)
Power supply
Note 1. When using the Power factor improving DC reactor, remove the short bar across P
2. G3-G4 contact specifications
Maximum voltage: 120V AC/DC
Maximum current: 0.5V/4.8VDC
Maximum capacity: 2.4VA
3. For specifications of cooling fan power supply, refer to Table 13.3.
4. For MR-RB136-4, "R" is "R400" and "S" is "S400".
Item
Model
Voltage Frequency
Power consumption [W]
higher than the ambient temperature. Fully consider heat
Converter unit
P
1
(Note 1)
P
2
C
P C
G3
Regenerative
option
Cooling fan
(Note 4)
R S
13 - 74
Table 13.3 Cooling fan
200V class
MR-RB137 MR-RB139
1-phase 198 to 242VAC, 50/60Hz 1-phase 380 to 480VAC, 50/60Hz
20 (50Hz)/18 (60Hz)
5m or less
24VDC
power supply
(Note 2)
G4
400V class
MR-RB136-4 MR-RB138-4
20 (50Hz)/18 (60Hz)
Servo motor
OHS1 OHS2
Servo motor
thermal relay
RA
-P .
1 2