Grounded isolation system
US7212391B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 22, 2002 |
| Grant date | May 1, 2007 |
| Priority date | — |
| Expiry date | Feb 1, 2023 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23Q5/58
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.