Double insulated protected system providing electrical safety an

Details Double insulated protected system providing electrical safety an Double insulated protected system providing electrical safety an

1983-09-21

1986-05-27

Pellinen, A. D.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Ground fault protection

361 35, 361 47, 336 84C, 324 51, 307326, H02H 300

Patent

active

045919410

ABSTRACT:
A double insulating protected system for use in coupling an instrumentation system to a remote power source so as to test an experimental system without posing life-threatening hazards. Connection between the instrumentation system and power source is accomplished by a pair of cascaded isolating transformers, with the connections between the two transformers being inaccessable, such as by a separate housing. The instrumentation system equipment ground is coupled to the experimental system equipment ground via a drain conductor so as to reference the former system to the same potential as that of the latter. The system provides a double insulation system such that a primary-to-secondary, primary-to-frame, or secondary-to-frame fault occurring in either of the transformers, or similar faults in the instrumentation system, will not result in a life-threatening situation to the system user.

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patent: 4392173 (1983-07-01), Rubin

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