Inrush Currents At Power-On Of Main Circuit And Control Circuit - Mitsubishi Electric MR-J4 Instruction Manual

10. CHARACTERISTICS

10.5 Inrush currents at power-on of main circuit and control circuit

Since large inrush currents flow in the power supplies, always use molded-case circuit breakers and
magnetic contactors. (Refer to section 11.10.)
When circuit protectors are used, it is recommended that the inertia delay type, which is not tripped by an
inrush current, be used.
(1) 200 V class
The following shows 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. When you use a 1-phase 200 V AC
power supply with MR-J4-10A(-RJ) to MR-J4-70A(-RJ), the inrush currents of the main circuit power
supply are the same.
MR-J4-10A(-RJ)
MR-J4-20A(-RJ)
MR-J4-40A(-RJ)
MR-J4-60A(-RJ)
MR-J4-70A(-RJ)
MR-J4-100A(-RJ)
MR-J4-200A(-RJ)
MR-J4-350A(-RJ)
MR-J4-500A(-RJ)
MR-J4-700A(-RJ)
MR-J4-11KA(-RJ)
MR-J4-15KA(-RJ)
MR-J4-22KA(-RJ)
POINT
The inrush current values can change depending on frequency of turning on/off
the power and ambient temperature.
Servo amplifier
(attenuated to approx. 3 A in 20 ms)
(attenuated to approx. 7 A in 20 ms)
(attenuated to approx. 12 A in 20 ms)
(attenuated to approx. 20 A in 20 ms)
(attenuated to approx. 20 A in 30 ms)
(attenuated to approx. 30 A in 30 ms)
(attenuated to approx. 50 A in 30 ms)
(attenuated to approx. 70 A in 30 ms)
Inrush currents (A
Main circuit power supply
(L1, L2 and L3)
30 A
34 A
113 A
42 A
85 A
226 A
226 A
226 A
10 - 13
)
0-P
Control circuit power supply
(L11 and L21)
20 A to 30 A
(attenuated to approx. 1 A in 20 ms)
34 A
(attenuated to approx. 2 A in 20 ms)
42 A
(attenuated to approx. 2 A in 30 ms)