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 servo amplifier) 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-J4-10B(-RJ) to MR-J4-70B(-RJ), the inrush currents of the main
circuit power supply is the same.
Servo amplifier
MR-J4-10B(-RJ)
MR-J4-20B(-RJ)
MR-J4-40B(-RJ)
MR-J4-60B(-RJ)
MR-J4-70B(-RJ)
MR-J4-100B(-RJ)
MR-J4-200B(-RJ)
MR-J4-350B(-RJ)
MR-J4-500B(-RJ)
MR-J4-700B(-RJ)
MR-J4-11KB(-RJ)
MR-J4-15KB(-RJ)
MR-J4-22KB(-RJ)
(2) 400 V class
The following shows the inrush currents (reference data) that will flow when 480 V AC is applied at the
power supply capacity of 2500 kVA and the wiring length of 1 m.
Servo amplifier
MR-J4-60B4(-RJ)
MR-J4-100B4(-RJ)
MR-J4-200B4(-RJ)
MR-J4-350B4(-RJ)
MR-J4-500B4(-RJ)
MR-J4-700B4(-RJ)
MR-J4-11KB4(-RJ)
MR-J4-15KB4(-RJ)
MR-J4-22KB4(-RJ)
POINT
The inrush current values can change depending on frequency of turning on/off
the power and ambient temperature.
Main circuit power supply (L1, L2, and L3)
30 A (attenuated to approx. 3 A in 20 ms)
34 A (attenuated to approx. 7 A in 20 ms)
113 A (attenuated to approx. 12 A in 20 ms)
42 A (attenuated to approx. 20 A in 20 ms)
85 A (attenuated to approx. 20 A in 30 ms)
226 A (attenuated to approx. 30 A in 30 ms)
226 A (attenuated to approx. 50 A in 30 ms)
226 A (attenuated to approx. 70 A in 30 ms)
Main circuit power supply
(attenuated to approx. 5 A in 10 ms)
(attenuated to approx. 5 A in 10 ms)
(attenuated to approx. 20 A in 10 ms)
(attenuated to approx. 9 A in 20 ms)
(attenuated to approx. 34 A in 20 ms)
(attenuated to approx. 10 A in 30 ms)
(attenuated to approx. 15 A in 30 ms)
(attenuated to approx. 20 A in 30 ms)
Inrush currents (A
Control circuit power supply (L11 and L21)
Inrush currents (A
(L1, L2 and L3)
65 A
80 A
100 A
65 A
68 A
339 A
339 A
339 A
10 - 13
)
0-P
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)
)
0-P
Control circuit power supply
(L11 and L21)
40 A to 50 A
(attenuated to approx. 0 A in 2 ms)
41 A
(attenuated to approx. 0 A in 3 ms)
38 A
(attenuated to approx. 1 A in 30 ms)