SMC Networks LECSN-T Series - 10.5 Inrush currents at power-on of main circuit and control circuit

10. CHARACTERISTICS
10 - 8
10.5 Inrush currents at power-on of main circuit and control circuit
POINT
For a driver of LECSN
□
-T8 or less, 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.
・
LECSN2-T
□
The following shows the inrush currents (reference data) that will flow when 240 V AC servo amplifier) is
applied. Even when you use a 1-phase 200 V AC power supply with LECSN2-T5 to LECSN2-T9, the
inrush currents of the main circuit power supply is the same.
Driver
Inrush currents (A
0-P
)
Main circuit power supply (L1, L2, and L3)
Control circuit power supply (L11 and L21)
LECSN2-T5/ LECSN2-T7/
LECSN2-T8
30 A (attenuated to approx. 3 A in 20 ms)
20 A to 30 A
(attenuated to approx. 1 A in 20 ms)
LECSN2-T9
34 A (attenuated to approx. 7 A in 20 ms)
・
LECSN1-T
□
(Scheduled release product)
The following shows the inrush currents (reference data) that will flow when 120 V AC is applied.
Driver
Inrush currents (A
0-P
)
Main circuit power supply
(L1/L2)
Control circuit power supply
(L11/L21)
LECSN1-T5
38 A
(attenuated to approx. 14 A in 10 ms)
20 A to 30 A
(attenuated to approx. 0 A
in 1 ms to 2 ms)
LECSN1-T7
LECSN1-T8