Inrush current, input surge current, or switch-on surge is the maximum instantaneous input current drawn when transformers are turned on. At this point of time, the transformer can   draw approximately 10 to 15 times of its normal full-load current for a few cycles of the input waveform.

 The selection of over-current-protection devices such as fuses and circuit breakers is made more complicated when high inrush currents must be tolerated. The over-current protection must react quickly to overload or short-circuit faults but must not interrupt the circuit when the (usually harmless) inrush current flows. Low Inrush Current Isolation transformer has the capability of limiting the inrush current inherently  and stop nuisance tripping the breaker without any single external components. QPS Low inrush transformer technology is provent by their track records, dependable, robust and cost effective. Further, Low inrush transformer may improve the life expectancy of the powering device.