CN2222976Y - Open delta phase interruption protection arrangement - Google Patents
Open delta phase interruption protection arrangement Download PDFInfo
- Publication number
- CN2222976Y CN2222976Y CN 94221390 CN94221390U CN2222976Y CN 2222976 Y CN2222976 Y CN 2222976Y CN 94221390 CN94221390 CN 94221390 CN 94221390 U CN94221390 U CN 94221390U CN 2222976 Y CN2222976 Y CN 2222976Y
- Authority
- CN
- China
- Prior art keywords
- open
- phase
- relay
- delta
- utility
- 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
Links
Landscapes
- Rectifiers (AREA)
Abstract
The utility model relates to a phase interruption protective device with a triangular opening, which is composed of a rectifying bridge which is composed of three transformers T < 1 >-T-[4] which respectively sample singly, four rectifying diodes D < 1 >-D-[4], a filtering capacitance C, and a small-sized relay J. The utility model has the advantages of simple structure and reliable running, and can accurately cut off the power supply of a three-phase asynchronous motor in time in the state that three-phase power supplies lack phases to ensure the three-phase asynchronous motor safely operates, being applicable to the control circuits of the three-phase asynchronous motors with the frequency of 50-60HZ and the voltage of 660V or 380V, and 380V or 220V.
Description
The utility model belongs to the protective circuit device, is applicable to 50～60 hertz of frequencies, 660 volts/380 volts of voltages; The control loop of 380 volts/220 volts of threephase asynchronouses.
Threephase asynchronous is widely used in producing and various fields in life; yet because supply network phase shortage or, cause three step out-phase motor can't form rotating magnetic field and the accident of being burnt happens occasionally because protection component, control element fault cause the phase failure.For preventing the generation of above-mentioned fault, all kinds of phase failure protectors have appearred on the market, as: current sample class phase failure protector, it need select different specifications for use with the difference of capacity motor, and Installation and Debugging work more complicated, thereby makes the user be difficult to accept; And voltage sample class phase failure protector; though wiring is fairly simple; but its internal circuit adopts the electronic component person in the majority; as triode, integrated circuit etc.; these components and parts environmental condition to external world require relatively stricter; under the condition of high temperature, high humility, high dust or strong mechanical oscillation and impact, often because of environmental inadequacies being influenced the reliability of its work.
The purpose of this utility model is, a kind of open-delta open phase protection is provided, and it is simple in structure, and is reliable, at the three phase mains non-full-phase state, can cut off the power supply of threephase asynchronous in time, exactly, ensures its safe operation.
Open-delta open phase protection of the present utility model is made up of transformer, rectifier diode, filter capacitor and relay, it is characterized in that: three transformer T that difference is sampled separately
1-T
4Primary side is connected with the threephase asynchronous end of incoming cables by star fashion, and secondary side is connected into open-delta formation residual voltage pass filter and is connected to by diode D
1-D
4The rectifier bridge of forming and the straight translation circuit of friendship that filter capacitor C forms, relay J is in parallel with capacitor C, constitutes protective device outlet circuit.
Open-delta open phase protection of the present utility model, under the normal condition, the vector of induced voltage and be zero on the sampling transformer secondary winding, the sensitive mini-relay normally closed contact is in on-state, and threephase asynchronous machine runs well; No matter the sort of reason causes the threephase asynchronous machine phase failure; vector on the sampling transformer secondary winding and then non-vanishing; its resultant voltage is through rectification; after the filtering, drive sensitive mini-relay and move rapidly, its normally closed point disconnects; the control loop outage of threephase asynchronous machine; the A.C. contactor tripping operation, threephase asynchronous machine cuts off the power supply, thereby has reached the purpose of power-off protection.
Open-delta open phase protection of the present utility model, its line construction is simple, and volume is little, and is strong to environmental suitability, quick to the open phase fault reaction.Be applicable to the control protective device of making threephase asynchronous.
Below in conjunction with drawings and Examples the open-delta open phase protection is described further.
Fig. 1 is the electrical schematic diagram of open-delta open phase protection
Fig. 2 is the assembling schematic diagram of open-delta open phase protection
As can be seen, a kind ofly form, it is characterized in that: three difference transformer T that samples separately by transformer 1, rectifier diode 2, filter capacitor 3 and relay 4
1-T
4Primary side is connected with the threephase asynchronous end of incoming cables by star fashion, and secondary side is connected into open-delta formation residual voltage pass filter and is connected to by diode D
1-D
4The rectifier bridge of forming and the straight translation circuit of friendship that filter capacitor C forms, relay J is in parallel with capacitor C, constitutes protective device outlet circuit.
Claims (1)
1, a kind of open-delta open phase protection is made up of transformer, rectifier diode, filter capacitor and relay, it is characterized in that: three difference transformer T that samples separately
1-T
4Primary side is connected with the threephase asynchronous end of incoming cables by star fashion, and secondary side is connected into open-delta formation residual voltage pass filter and is connected to by diode D
1-D
4The rectifier bridge of forming and the straight translation circuit of friendship that filter capacitor C forms, relay J is in parallel with capacitor C, constitutes protective device outlet circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94221390 CN2222976Y (en) | 1994-09-22 | 1994-09-22 | Open delta phase interruption protection arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94221390 CN2222976Y (en) | 1994-09-22 | 1994-09-22 | Open delta phase interruption protection arrangement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2222976Y true CN2222976Y (en) | 1996-03-20 |
Family
ID=33835704
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94221390 Expired - Fee Related CN2222976Y (en) | 1994-09-22 | 1994-09-22 | Open delta phase interruption protection arrangement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2222976Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102842888A (en) * | 2011-06-24 | 2012-12-26 | 深圳市万禧节能科技有限公司 | Energy saving and load protecting device and method for alternating current contactor |
-
1994
- 1994-09-22 CN CN 94221390 patent/CN2222976Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102842888A (en) * | 2011-06-24 | 2012-12-26 | 深圳市万禧节能科技有限公司 | Energy saving and load protecting device and method for alternating current contactor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN2222976Y (en) | Open delta phase interruption protection arrangement | |
| CN2240799Y (en) | Phase-loss protector | |
| CN2580650Y (en) | Open-phase protector for AC motor | |
| CN2217853Y (en) | Intelligent monitoring stablizing protector for ac. electric power supply | |
| CN2153895Y (en) | Leakproof phase-failure protective switch | |
| CN2170594Y (en) | Distributing box for residential building | |
| CN214704898U (en) | High-voltage board alarm device that opens door | |
| CN2150655Y (en) | Safety protecting instrument for AC motor | |
| CN2313320Y (en) | Electronic over-current protector | |
| CN2517159Y (en) | Passive electromagntic motor protector | |
| CN101783502A (en) | Electronic type overcurrent protector | |
| CN2060956U (en) | Multi-functional protecting devices for three-phase alternating current electric machinery | |
| CN2165556Y (en) | All-purpose automatic protection switch for motor | |
| CN2132324Y (en) | Phase-failure protector for electric machine | |
| CN2144883Y (en) | Fault memory protector for intelligent motor | |
| CN2273915Y (en) | Phase interruption protective and safety control device for three phase ac electris motor | |
| CN2164605Y (en) | Phase-loose protector | |
| CN2338899Y (en) | Automatic switch device with prevention of fraudulent use of electricity | |
| CN2310412Y (en) | Phase loss protector for three-phase asynchronous motor | |
| CN2503654Y (en) | Automatic protecter for electric equipment | |
| CN2278293Y (en) | Three-phase motor end energy-saving safety operation device | |
| CN2169235Y (en) | Phase off protector | |
| CN201398064Y (en) | Open phase protecting device | |
| CN2150652Y (en) | Protector for three-phase motor without power supply | |
| CN2134739Y (en) | General phase loss leakage protector |
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 |