FIELD: electrical engineering; automatic protective devices. SUBSTANCE: additional positive feedback is introduced. When leakage current rises above 6 mA, signal level across output of amplifier 2 reaches value at which positive feedback 5 starts functioning with the result that amplifier 2 changes its position to OFF. EFFECT: improved reliability of protective gear. 1 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| DEVICE FOR PROTECTIVE DISCONNECTIONS IN A C ELECTRIC POWER SYSTEM WITH SOLIDLY GROUNDED NEUTRAL | 1991 |
|
RU2007812C1 |
| GEAR FOR PROTECTIVE CUT-OFF OF ELECTRIC A C NETWORK | 1997 |
|
RU2124795C1 |
| DEVICE FOR PROTECTIVE DISCONNECTION IN AC CIRCUIT WITH GROUNDED NEUTRAL | 1997 |
|
RU2124794C1 |
| COMPOSITE PROTECTIVE DISCONNECTION DEVICE | 2000 |
|
RU2214664C2 |
| AC MAINS ELECTRICAL SAFETY DEVICE | 1994 |
|
RU2097894C1 |
| METHOD OF SHUTOFF PROTECTION IN AC MAINS | 2008 |
|
RU2360348C1 |
| METHOD OF PROTECTIVE DISCONNECTION OF AC NETWORK AT TOUCHING CURRENT-CARRYING PARTS BY A MAN | 0 |
|
SU1012381A1 |
| DEVICE FOR PROTECTIVE DISCONNECTION IN AC CIRCUIT | 0 |
|
SU1582254A2 |
| PROTECTIVE DISCONNECTION DEVICE FOR A.C. NETWORK | 0 |
|
SU1464239A2 |
| DEVICE FOR PROTECTIVE DISCONNECTION IN A.C. MAINS | 0 |
|
SU1513562A1 |
