High-tension voltage generator and method of protecting same aga

Details High-tension voltage generator and method of protecting same aga High-tension voltage generator and method of protecting same aga

1987-12-14

1990-03-27

DeBoer, Todd E.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Ground fault protection

361 46, 361 49, 361 85, 361228, H02H 316

Patent

active

049125885

ABSTRACT:
In an electrostatic paint spraying installation or the like, a high-tension voltage generator comprises a voltage rectifier-multiplier in a mobile subsystem and a grounding connection in a fixed subsystem. A conductive wire connects an input terminal of the voltage rectifier-multiplier to the grounding connection. When the high-tension voltage generator operates, a high-frequency alternating current residual signal injected into this conductive wire is sensed and measured. The measured value is compared against a reference value that may be variable. The high-tension voltage generator is disabled if the difference between the measured value and the reference value reaches or crosses a predetermined threshold.

REFERENCES:
patent: 3959695 (1976-05-01), Shimp
patent: 4133413 (1979-01-01), Watanabe
patent: 4159499 (1979-06-01), Bereskin
patent: 4305108 (1981-12-01), Udren
patent: 4672500 (1987-06-01), Tholome et al.
patent: 4737887 (1988-04-01), Thome

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