FIELD: protection of traction networks against short-circuit currents.
SUBSTANCE: method includes measurement of values proportional to rates of current variation on adjacent filters separated by insulating air gap. These values are summed up including their polarities. Sum obtained is compared with setting value of current variation rate much lower than value proportional to rates of current variation at each of adjacent feeders. If sum obtained is higher than setting value, signal is generated for opening circuit breaker on feeder where rate of current growth is positive.
EFFECT: enhanced selectivity and sensitivity of protective gear on traction circuit feeders.
1 cl, 3 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| DEVICE FOR PROTECTING CONTACT NETWORK FROM SHORT CIRCUIT CURRENTS | 2004 |
|
RU2279171C2 |
| PROTECTIVE CIRCUIT FOR ADJACENT FEEDERS OF DC TRACTION SYSTEM (ALTERNATIVES) | 2000 |
|
RU2207688C2 |
| METHOD FOR PROTECTING DC TRACTION LINE BY CURRENT INCREMENT | 1999 |
|
RU2161355C1 |
| PROTECTIVE CIRCUIT OF DC TRACTION NETWORK FEEDERS (ALTERNATIVES) | 2003 |
|
RU2254657C1 |
| METHOD OF COORDINATION OF PROTECTION ACTION OF SUPPLY LINES ADJACENT TO INSULATING COUPLING OF DIRECT CURRENT | 2019 |
|
RU2727706C1 |
| 0 |
|
SU169645A1 | |
| DEVICE FOR PROTECTING DC CONTACT NETWORK FROM SHORT CIRCUITING | 0 |
|
SU908629A1 |
| DEVICE FOR PROTECTION D.C. POWER NETWORKS FROM SHORT CIRCUITING | 0 |
|
SU1481106A1 |
| METHOD FOR PROTECTING NEUTRAL LINKS OF AC CONTACT SYSTEMS | 2000 |
|
RU2241295C2 |
