Motor protection circuit
US4017778A · kind A · utility
5Cited by
6References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 6, 1974 |
| Grant date | Apr 12, 1977 |
| Priority date | — |
| Expiry date | Sep 6, 1994 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H7/0852
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A motor protection circuit includes a capacitance and resistance timing circuit together with temperature sensing facilities which are energized upon motor startup to terminate operation of a motor in the event of insufficient oil pressure or excessive heat. An oil pressure sensing switch is connected to the timing circuit to prevent its operation so long as sufficient oil pressure is sensed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.