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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-J4-10TM to MR-J4-200TM, the inrush currents of the main
circuit power supply is the same.
Servo amplifier
MR-J4-10TM
MR-J4-20TM
MR-J4-40TM
MR-J4-60TM
MR-J4-70TM
MR-J4-100TM
MR-J4-200TM
MR-J4-350TM
MR-J4-500TM
MR-J4-700TM
MR-J4-11KTM
MR-J4-15KTM
MR-J4-22KTM
POINT
For a servo amplifier of 600 W or less, 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)
Inrush currents (A
Control circuit power supply (L11 and L21)
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)
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