Mass of current inrush limiters

Details Mass of current inrush limiters Mass of current inrush limiters

H - Electricity

05

B

315/71

H05B 39/02 (2006.01) H01K 1/62 (2006.01)

Patent

CA 1064101

ABSTRACT OF THE DISCLOSURE An arrangement to eliminate the initial current overshoot which normally occurs when a tungsten incandescent lamp is connected to a power source. The arrangement uses a negative temperature coefficient thermistor having a certain predetermined mass. It has been determined that a practical limiter to eliminate current overshoot can be made only when the mass of the limiter is within a relatively narrow range. The hot and cold resistance of the limiter must also be within prescribed ranges to give a limiter which is not only effective in eliminating the current overshoot, but also efficient in steady state operation such that the limiter dissipates less than 1% of the total power.

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