FIELD: electricity.
SUBSTANCE: invention is used in electrical engineering. In PDD (1) with a test circuit (2) for generation of test leakage current the test circuit (2) contains at least one first test resistor (3), and also a test push-button switch (4). For accurate, in particular, mains voltage independent operational reliability it is offered that the test circuit (2) should contained a control circuit (5) and that the control circuit (5) should be designed so that the test leakage current generated in the test circuit (2) has, actually independent from the applied mains voltage, pre-determined and, actually constant value. The control circuit (5) is connected to mains leads (N, L1) only in case of closed test circuit.
EFFECT: improvement of operational reliability.
10 cl, 2 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| OFF-OPERATION PROTECTIVE DEVICE INCORPORATING DISCONNECTION PHASE SYNCHRONIZER | 2006 |
|
RU2321127C1 |
| OFF-OPERATION PROTECTIVE GEAR FOR POWER INSTALLATIONS IN SINGLE-PHASE LINE WITH SOLIDLY GROUNDED NEUTRAL | 2000 |
|
RU2184413C2 |
| DEVICE FOR PROTECTIVE DISCONNECTION IN AC CIRCUIT WITH GROUNDED NEUTRAL | 1997 |
|
RU2124794C1 |
| AUTOMATIC CIRCUIT BREAKER FOR LEAK CURRENT PROTECTION | 2009 |
|
RU2497255C2 |
| DEVICE FOR PROTECTIVE DISCONNECTION OF ELECTRIC EQIPMENT IN AC ELECTRIC NETWORK | 0 |
|
SU890512A1 |
| DEVICE FOR PROTECTING THE THREE-PHASE PLANT FROM ABNORMAL MODES | 1991 |
|
RU2027273C1 |
| DEVICE FOR PROTECTING CUTOUT IN ELECTRIC CIRCUIT WITH GROUNDED NEUTRAL | 2006 |
|
RU2319269C1 |
| DEVICE FOR PROTECTIVE DE-ENERGIZING OPERATING IN SYSTEM WITH SOLIDITY EARTHED NEUTRAL AND VOLTAGE UP TO 1000 VOLT | 0 |
|
SU1132322A1 |
| ELECTRIC DRIVE SWITCH CONTROL MODULE AND ELECTRIC DRIVE MECHANISM CONTROL METHOD | 2018 |
|
RU2703358C1 |
| PROTECTIVE CUTOUT DEVICE | 2011 |
|
RU2572619C2 |
