Mass of current inrush limiters

Details Mass of current inrush limiters Mass of current inrush limiters

1975-06-10

1976-08-17

Mullins, James B.

Electric lamp and discharge devices: systems

Combined load device or load device temperature modifying...

Load device and impedance

315309, 315311, H05B 3904

Patent

active

039756580

ABSTRACT:
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.

REFERENCES:
patent: 3467937 (1969-09-01), Norton

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