Zener diode effect on long acceleration module

Details Zener diode effect on long acceleration module Zener diode effect on long acceleration module

1974-09-09

1976-12-07

Duggan, Donovan F.

317 33SC, 317 13A, H02H 708, H02H 310

Patent

active

039964990

ABSTRACT:
The utilization of a Zener diode long acceleration module in conjunction with a inverse time overload module for a motor starter control system. The long acceleration module prevents the quick opening of the motor starter during the acceleration mode of an electrical motor when overload currents of relatively high magnitude are present for short periods of time in the electrical system connected to the motor. Other protective devices in the circuit will protect the system should an overload occur other than the type of overload associated with the long acceleration of a motor or similar electric device.

REFERENCES:
patent: 3602783 (1971-08-01), Engle
patent: 3792313 (1974-02-01), Conrad
patent: 3818275 (1974-06-01), Shimp
"Improved Static Over-current Relay with I.D.M.T. Characteristic;" by S. C. Gupta, Dr. T. S. M. Rao; IE(I) Journal EL, pp. 138-140, 2-73.

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