CN2165553Y - Phase interruption protector - Google Patents
Phase interruption protector Download PDFInfo
- Publication number
- CN2165553Y CN2165553Y CN 93224396 CN93224396U CN2165553Y CN 2165553 Y CN2165553 Y CN 2165553Y CN 93224396 CN93224396 CN 93224396 CN 93224396 U CN93224396 U CN 93224396U CN 2165553 Y CN2165553 Y CN 2165553Y
- Authority
- CN
- China
- Prior art keywords
- phase
- triode
- ttl
- control circuit
- photoelectrical coupler
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model relates to a phase interruption protector, which is provided with a signal detection circuit, a control circuit and a working power supply, wherein, the signal detection circuit and the control circuit are isolated by a photoelectric coupler TTL; the signal detection circuit is connected into one point to form a signal factor after the three-phase voltage of the signal detection circuit is decreased; the control circuit adopts a transistor as a drive circuit and is provided with a relay J for controlling a three-phase power supply. The utility model has the advantages of simple circuits and strong stability. Due to the adoption of the photoelectric coupler, the phase interruption protector also has the advantages of quick phase interruption feedback, strong anti-interference ability, and safe and reliable protection of phase interruption.
Description
The utility model relates to a kind of interchange phase failure protector.
General in the market open phase protection mostly adopts thermistor-type, and it is that contact is stretched to motor near inner; phase failure rear motor produces high heat, and produces signal feedback, cuts off the electricity supply; because the contact of thermistor-type open phase protection can not be deep into motor coil inside, so in case the phase failure, motor produces high heat and needs the long period; then could pass through thermistor; cut off the electricity supply, feedback speed is slow, and ambient temperature is when changing greatly; device even meeting are out of control, poor reliability.
The purpose of this utility model be to overcome above-mentioned technology defective, provide a kind of phase failure feedback rapid, safe and reliable, the phase failure protector that stability is strong.
The utlity model has signal deteching circuit, control circuit and working power, signal deteching circuit and control circuit are isolated by photoelectrical coupler TTL, signal deteching circuit is provided with and meets A, B, substitutional resistance R1, the R2 of C three-phase, R3 respectively, and resistance R 1, R2, R3 are connected in a bit after photoelectrical coupler TTL triode connects zero phase N; The base stage that control circuit is provided with triode T, relay J, triode T connects the emitter-base bandgap grading of triode among the photoelectrical coupler TTL and connects collector electrode, the emitter grounding of triode among the photoelectrical coupler TTL, the break-make of the contact control three phase mains of relay J through resistance R 4 ground connection, collector electrode through relay J.
Further specify the utility model below in conjunction with embodiment and accompanying drawing.
Accompanying drawing is the line map of present embodiment.
Present embodiment is provided with signal deteching circuit, control circuit and working power, signal deteching circuit and control circuit are isolated by photoelectrical coupler TTL, signal deteching circuit is provided with and meets A, B, substitutional resistance R1, the R2 of C three-phase, R3 respectively, and resistance R 1, R2, R3 are connected in a bit after the diode of photoelectrical coupler TTL connects zero phase N; Control circuit is provided with triode T, relay J, the base stage of triode T connects the emitter-base bandgap grading of triode among the photoelectrical coupler TTL and connects collector electrode, the emitter grounding of triode among the photoelectrical coupler TTL, the break-make of the contact control three phase mains of relay J through resistance R 4 ground connection, collector electrode through relay J.Triode T described in this example adopts compound transistor T1, T2, thereby constitutes compound drive circuit; And be provided with from A, B, C three-phase one mutually with the zero working power V+ that obtains through transformer B and rectifying tube DZ between N mutually.
After present embodiment is installed and used, when three-phase just often, photoelectrical coupler TTL does not have the signal of telecommunication, does not work, at this moment, triode T1 base potential is zero, the control circuit conducting, relay J work, three phase mains normally connects; Press relation undesired mutually when the phase failure or three-phase, photoelectrical coupler gets signal of telecommunication work, and triode T1 base potential rises, and control circuit ends, and relay J is partial to another state, its break of contact three phase mains.
The utility model is a foundation with normal the closing of three-phase phase positive pressure; do not need extraneous signal; the photoelectrical coupler that adopts, phase failure feedback is rapid, and antijamming capability is strong; open phase protection is safe and reliable; owing to connect with parallel three phase when using, there is not overload problem own, all suitable to the big small machine of different capacity; and circuit own is simple, and stability is strong.
Claims (3)
1, a kind of phase failure protector with signal deteching circuit, control circuit and working power, it is characterized in that: signal deteching circuit and control circuit are isolated by photoelectrical coupler TTL, signal deteching circuit is provided with and meets A, B, substitutional resistance R1, the R2 of C three-phase, R3 respectively, and resistance R 1, R2, R3 are connected in a bit after the triode of photoelectrical coupler TTL connects zero phase N; Control circuit is provided with triode T, relay J, the base stage of triode T connects the emitter-base bandgap grading of triode among the photoelectrical coupler TTL and connects collector electrode, the emitter grounding of triode among the photoelectrical coupler TTL, the break-make of the contact control three phase mains of relay J through resistance R 4 ground connection, collector electrode through relay J.
2, phase failure protector according to claim 1 is characterized in that: described triode T adopts compound triode T1, T2.
3, according to claims 1 described phase failure protector, it is characterized in that: be provided with from A, B, C three-phase one mutually with the zero working power V+ that obtains through variator B and rectifying tube DZ between N mutually.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93224396 CN2165553Y (en) | 1993-09-15 | 1993-09-15 | Phase interruption protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93224396 CN2165553Y (en) | 1993-09-15 | 1993-09-15 | Phase interruption protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2165553Y true CN2165553Y (en) | 1994-05-18 |
Family
ID=33802443
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93224396 Expired - Fee Related CN2165553Y (en) | 1993-09-15 | 1993-09-15 | Phase interruption protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2165553Y (en) |
-
1993
- 1993-09-15 CN CN 93224396 patent/CN2165553Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |