Plug-in transient voltage suppressor module
US5010438A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 16, 1989 |
| Grant date | Apr 23, 1991 |
| Priority date | — |
| Expiry date | Jun 16, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2071/088
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A plug-in surge suppressor module for insertion into a circuit breaker panel includes four stacks of metal oxide varistors (MOVs) arranged in a cloverleaf pattern on opposite sides of an elongated copper ground bus attached to one lead of each of the metal oxide varistors. The other leads of two of the stacks of metal oxide varistors are attached to a terminal of a U-shaped first resistive wire fuse, another terminal of which is connected to a first AC power line conductor. The other leads of the other two stacks of MOV's are attached to a terminal of a second U-shaped resistive wire fuse, another terminal of which is connected to a second AC power line conductor. A monitor circuit senses the presence of power and continuity of both fuses by pulsing a light emitting indicator diode every cycle of the AC line. A low frequency oscillator circuit produces slow blinking of the light emitting indicator diode which alerts an observer to replace te surge suppressor module if one of the fuses fails.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.