Direct -current overvoltage protection circuit
The utility model relates to a direct -current overvoltage protection circuit, including power input end and connected load's power output end a triode Q1, resistance R2 connecting resistance R1 and stabilivolt D1's positive pole is respectively passed through to triode Q1's base, res...
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| Format: | Patent |
| Sprache: | eng |
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| Zusammenfassung: | The utility model relates to a direct -current overvoltage protection circuit, including power input end and connected load's power output end a triode Q1, resistance R2 connecting resistance R1 and stabilivolt D1's positive pole is respectively passed through to triode Q1's base, resistance R1 ground connection, stabilivolt D1's the negative pole input of connecting, triode Q1's collecting electrode through the resistance R3 input of connecting, triode Q2's base is still connected to triode Q1's collecting electrode through resistance R5, triode Q2's collecting electrode and power input end between be connected a relay J's coil both ends, triode Q2's emitter ground. The utility model discloses a relay operation opens intercommunication and disconnection between control power output end and the power input end, simple structure, and the reaction is fast, and not good malfunction. |
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