Grounded isolation system

Details Grounded isolation system Grounded isolation system

2007-05-01

2007-05-01

Sircus, Brian (Department: 2836)

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

For relays or solenoids

C361S042000

Reexamination Certificate

active

10153075

ABSTRACT:
An system and method are disclosed for isolating and grounding a load device, where grounding only occurs after the voltage(s) on the load device have been reduced to acceptable levels. The system includes power and grounding contacts, a sensing device, and a control device. The power contact determines whether a power line is coupled to a terminal of the load. The grounding contact determines whether the terminal is coupled to ground. The sensing device is coupled to the terminal, and the control device communicates with the contacts and sensing device. Upon a signal being provided to the control device, the control device causes the power contact to decouple the terminal from the power line and, upon the sensing device determining that a condition has been met concerning the terminal, the control device causes the grounding contact to couple the terminal with ground and a system indication light to be illuminated.

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