Mitsubishi Electric MR-J4W2, Instruction Manual

Page: 228 / 542

10. CHARACTERISTICS
10 - 9
10.4 Cable bending life
The bending life of the cables is shown below. This graph calculated values. Since they are not guaranteed
values, provide a little allowance for these values.
10.5 Inrush currents at power-on of main circuit and control circuit
POINT
The inrush current values can change depending on frequency of turning on/off
the power and ambient temperature.
Since large inrush currents flow in the power supplies, always use molded-case circuit breakers and
magnetic contactors. (Refer to section 11.6.)
When circuit protectors are used, it is recommended that the inertia delay type, which is not tripped by an
inrush current, be used.
The following table indicates the inrush currents (reference data) that will flow when 240 V AC is applied at
the power supply capacity of 2500 kVA and the wiring length of 1 m. Even when you use a 1-phase 200 V
AC power supply with MR-J4W2-22B to MR-J4W2-77B, MR-J4W3-222B, and MR-J4W3-444B, the inrush
currents of the main circuit power supply is the same.
MR-J4
2-axis servo amplifier
MR-J4
3-axis servo amplifier
Inrush currents (A
0-P
)
Main circuit power supply
(L1, L2 and L3)
Control circuit power supply
(L11 and L21)
MR-J4W2-22B MR-J4W3-222B
113 A
(attenuated to approx. 6 A in 20 ms)
24 A
(attenuated to approx. 2 A in 20 ms)
MR-J4W2-44B MR-J4W3-444B
MR-J4W2-77B
113 A
(attenuated to approx. 11A in 20 ms)
MR-J4W2-1010B