-17-
Electrical Wiring
Connect power to the terminal box on the side of the unit. Connect power supply wiring from the equipment
circuit that has a protective device. If an electromagnetic switch is used in that circuit, adjust the thermal
relay set points to the rated current value of the motor.
Thermal relay set points(A)
Machine model
50Hz
60Hz
MJ-5
1.8
1.75
MJ-10
3.1
2.8
MJ-15
5.7
5.5
MJ-25
8.7
8.0
* The set points are based on the assumption that a
power supply of 3-phase 200V is used.
NOTE: The unit operates with both 50 and 60 Hz cycles.
1
Open the terminal box.
Uncover the terminal box by removing the screw on
the top.
2
Connect the power cord.
Connect the power cords to the terminal block in the
terminal box, as follows.
1)
Loosen the cap to pass the power cords through
the cable gland.
All work associated with power supply connection must be performed by an authorized electrician.
Check the power supply requirements on the nameplate on the unit before connecting power.
The power cord should be more than 0.75 mm2 in thickness, and of VCT four-conductor cord.
After completing the wiring and before operating the unit for the first time, make sure the motor rotates
in the direction of the arrow. If it rotates in the opposite direction, interchange the U and W phases of
the three power cords (see page 21).
Use round terminals for the tips of the power cords. The diameter of the round terminal should be
M3.5, and the terminal width should be 6.6 mm or less.
If the cable gland is of the wrong size, obtain the proper size locally. The hose size on the terminal box
is
φ
21 mm.
Electromagnetic switch
Thermal relay setting
Terminal box
Cap
Cable gland