FIELD: electrical engineering.
SUBSTANCE: proposed protective device has voltage-sensing heating unit that functions to release heat when potential difference between its both ends exceeds desired level and heat-sensing unit whose current ON/OFF operation is invertible function of temperature. Heat-sensing unit is connected to voltage-sensing heating unit so that it detects heat released by voltage-sensing heating unit.
EFFECT: improved characteristics of protective device.
15 cl, 14 dwg
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