2.3 Specifications
A2-11
ME0384-4A
Chapter 2 System Configuration and Specifications
[In-Rush Current of IAI Power Supply Unit PSA-24]
Item Conditions Specifications
In-Rush Current
At Cold Start (25°C)
AC100V 17A (typ)
AC200V 34A (typ)
At Cold Start (40°C)
AC100V 27.4A (typ)
AC200V 54.8A (typ)
The pulse width that the in-rush current flows in is 5ms or less. Also, in parallel operation, the in-
rush current is added for number of units. Confirm the characteristics when select so the
breaker would not work at the in-rush current.
[For 200V System]
For selection of the circuit breaker, follow the instructions below.
• Three times higher current than the rated flows to the controller at acceleration / deceleration.
Select a breaker that would not trip when this much current flows. In case it trips, it is
necessary to select a breaker with rated current one rank higher. (Check with the operation
characteristic curves shown in a catalog provided by the manufacturer.)
• Select a breaker that would not trip with the in-rush current. (Check with the operation
characteristic curves shown in a catalog provided by the manufacturer.)
• Select the rated cutoff current that surely cuts off the current even when short-circuit current
flows.
Rated Cutoff Current > Short-Circuit Current = Primary Current Amperage / Power Voltage
Have enough margin to the rated current when you select a circuit breaker.
For Single-Phase 200V AC:
Rated Current of Circuit Breaker > Motor Current Amperage (VA) ÷ AC Input Voltage × Margin (1.2 ~ 1.4)
For 3-Phase 200V AC:
Rated Current of Circuit Breaker > Motor Current Amperage (VA) ÷ AC Input Voltage × Margin (1.2 ~ 1.4) ÷ √3
*Selection of Leakage Breaker
• The leakage current may vary depending on the wattage of motor, cable length and other
ambient environment. In case of leakage protection, measure the leakage current at the
position to install a leakage breaker.
• Select a leakage breaker applicable for higher harmonics.
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