FIELD: electrical engineering.
SUBSTANCE: way to protect a three-phase network from overload and short circuit is that the input signals proportional to the instantaneous phase currents are differentiated, after which it is squared, the received signals are summed, obtaining a generalized signal that is compared with the set voltage value, and in case of exceeding by the generalized signal of the set value of voltage by means of the comparator, a signal is issued to disconnect the overloaded feeder.
EFFECT: increased speed of response when determining the time of the overload or short-circuit of a three-phase source.
1 cl, 3 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF SYNCHRONIZATION OF SYNCHRONOUS GENERATORS | 2017 |
|
RU2652379C1 |
| METHOD FOR THREE-PHASE CIRCUIT MOMENTARY POWER FACTOR MEASURING AND DEVICE FOR ITS REALISATION | 2016 |
|
RU2627986C1 |
| METHOD OF THE THREE-PHASE NETWORK INSTANT REACTIVE POWER DETERMINING | 2016 |
|
RU2651809C1 |
| METHOD OF MEASUREMENT OF THE INSTANT REACTIVE POWER OF THE THREE-PHASE NETWORK | 2016 |
|
RU2644034C1 |
| STARTER MEMBER FOR RELAY PROTECTION ARRANGEMENT | 0 |
|
SU681496A1 |
| METHOD OF HIGH-SPEED OVERCURRENT PROTECTION OF ELECTRICAL CIRCUITS (VERSIONS) | 2007 |
|
RU2355090C1 |
| ROTATION SPEED METER | 0 |
|
SU1083118A1 |
| NEGATIVE-SEQUENCE CURRENT MEASURING TRANSDUCER FOR THREE-PHASE THREE-WIRE CIRCUIT | 2013 |
|
RU2536784C1 |
| METHOD FOR AUTOMATIC CONTROL OF COMPENSATION OF CAPACITANCE AND RESISTANCE CONSTITUENTS WHEN ARC SHORT-CIRCUITS TO EARTH OCCUR | 1994 |
|
RU2074473C1 |
| THREE-PHASE CURRENT RELAY | 0 |
|
SU1725311A1 |
