| 摘要 |
FIELD: power engineering; overcurrent releases of circuit breakers. SUBSTANCE: protective gear has current sensor, N relay elements according to number of protected channels, delay circuits, output stage, N circuits each incorporating flip- flop, two transistors, and light-emitting diode, reset button, two signal shapers, power supply, isolating diodes, and current-limiting resistor. EFFECT: reduced time required to identify cause of trouble, improved reliability of power supply, facilitated maintenance. 1 dwgf
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