FIELD: ensuring electric safety for people and animal in agriculture.
SUBSTANCE: self-testing of proposed differential protective gear is effected by pulse generator, polarized relay, and additional differential current sensor whose coil is provided with pulse generator that functions to ensure desired test intervals and distribution of test signals among control circuit channels of polarized electromagnetic relay incorporating warning device, power conductors of supply mains being passed through magnetic core opening of additional current sensor.
EFFECT: provision for periodic self-testing of protective gear magnetic circuit for condition.
1 cl, 1 dwg
| Title | Year | Author | Number |
|---|---|---|---|
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|
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| DIFFERENTIAL APPARATUS | 2003 |
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|
RU2172050C1 |
| TRANSFORMER OF CURRENT OF ZERO SEQUENCE | 0 |
|
SU1800488A1 |
