Electricity: measuring and testing – Electromechanical switching device – Relay
Patent
1983-09-21
1986-12-09
Eisenzopf, Reinhard J.
Electricity: measuring and testing
Electromechanical switching device
Relay
G01R 3132
Patent
active
046282688
ABSTRACT:
A test device for testing an actuator circuit without operating an actuator in the circuit to determine whether the circuit is operating normally comprises a relay input and a relay output which are electromagnetically coupled or optically coupled. The relay input is connected in series with a test circuit power supply for initiating the test and operating the relay output which is connected with an actuator power supply and an actuator. A voltage limiting device is connected in series with the relay output for limiting the magnitude of the voltage supplied to the actuator at testing time so that the actuator is not operated. The test circuit power supply further includes a pulse generating circuit for generating a signal pulse having a pulse width less than a predetermined pulse width normally required to operate the actuator.
REFERENCES:
patent: 1992146 (1935-02-01), Craig
patent: 2780777 (1957-02-01), Sammis
patent: 3590319 (1971-06-01), Baltensperger
patent: 3873854 (1975-03-01), Lamb
RCA Transistor, Thyristor and Diode Manual: Technical Series SC-15, pp. 232-235, 1971, RCA Corporation.
Voltage Stabilizers by F. A. Benson: Electronics Engineering, London--1950 (pp. 9-11 and pp. 87-91).
"Engineered Safety Features Actuation Systems Follow-Up System Logic," I.EEE, vol. NS-27, No.-1, Feb. 1980, pp. 859-860, S. V. Athavale et al.
Eisenzopf Reinhard J.
Harvey Jack B.
Mitsubishi Denki & Kabushiki Kaisha
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