CN203243020U - Three-phase imbalance circuit breaker - Google Patents
Three-phase imbalance circuit breaker Download PDFInfo
- Publication number
- CN203243020U CN203243020U CN 201320295324 CN201320295324U CN203243020U CN 203243020 U CN203243020 U CN 203243020U CN 201320295324 CN201320295324 CN 201320295324 CN 201320295324 U CN201320295324 U CN 201320295324U CN 203243020 U CN203243020 U CN 203243020U
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- CN
- China
- Prior art keywords
- midget relay
- phase imbalance
- phase
- circuit breaker
- elementary
- 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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- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
A three-phase imbalance circuit breaker is formed by connecting miniature transformers BK1, BK2 and BK3 and miniature relays J1, J2 and J3. The three-phase imbalance circuit breaker is connected with a power supply through external ends A, B, C and E, and the external end D is connected with one end of an alternating-current contactor coil. When imbalance of power of phases A, B and C reaches 40%, D and E are disconnected, and an alternating-current contactor J4 loses power and is tripped off to cut off transmission of three-phase imbalance power.
Description
Technical field
The utility model relates to a kind of transmitting transformer primary and secondary and lacks a phase, the automatic safety device that the motor that causes secondary output three-phase imbalance power supply to cause to be in operation damages.
Background technology
The device of existing protection electric equipment is take air switch as main, and open-phase protection is auxiliary, and the three-phase imbalance phenomenon seldom occurs itself, therefore, does not also have the three-phase imbalance protective device of specialty.The utility model is made this three-phase imbalance circuit breaker.
Summary of the invention
The purpose of this utility model provides a kind of secondary voltage by 3 single-phase miniature transformers, for 3 midget relay work.3 midget relay closures connect lines, remove to connect an end of A.C. contactor pull-in winding with this line.The instruction of switching electricity is provided; Disconnect the three-phase imbalance circuit breaker of three-phase imbalance load power supply.
The technical scheme that its technical problem that solves the utility model adopts is: its circuit part of three-phase imbalance circuit breaker provides power supply by A, B, C, and A, B connect miniature transformer BK
1Elementary, B, C connect miniature transformer BK
2Elementary, C, A connect miniature transformer BK
3Elementary, BK
1Secondary connection midget relay coil J
1Two ends, BK
2Secondary connection midget relay coil J
2Two ends, BK
3Secondary connection midget relay coil J
3Two ends, midget relay J
1Top is drawn out to E end, midget relay J with line
1The terminal J in contact
1-2 connect midget relay J
2Top, midget relay J
2The terminal J in contact
2-2 connect midget relay J
3Top, midget relay J
3The terminal J in contact
3-2 usefulness lines are drawn out to the D end.The E end of the three-phase imbalance circuit breaker of the above connection of process is connected with B; D end and ac contactor coil J
4An end connect ac contactor coil J
4The other end with after C is connected, when three-phase voltage is voltage in a basic balance, J
1, J
2, J
3Closure, the A.C. contactor normally closed powers to the load.As three phase mains A, B, DE disconnection when the C imbalance reaches 40 percent, ac contactor coil J
4The conveying of three-phase imbalance power supply is cut off in the dead electricity tripping.
The beneficial effects of the utility model are: the three-phase imbalance circuit breaker can make the insurance of power transformer current enter fall with other reasons and cause supply transformer elementary scarce mutually; during secondary output three-phase imbalance voltage; open-phase protection is not its protection range; be failure to actuate; the high voltage phase current increase of electrical equipment of being injured does not reach again in the situation that air switch tripping operation critical limit is failure to actuate, and in time cuts off the three-phase imbalance power supply of harmful electric equipment.
Description of drawings
Fig. 1 is the circuit principle structure figure of the utility model three-phase imbalance circuit breaker.
Fig. 2 is three-phase imbalance circuit breaker embodiment normal condition structure chart.
Fig. 3 is the elementary scarce A phase time of power transformer, and the three-phase imbalance circuit breaker is implemented the open circuit protection structure chart.
When Fig. 4 was the elementary scarce B phase of power transformer (middle phase), the three-phase imbalance circuit breaker was implemented the open circuit protection structure chart.
A, B, C are three-phase imbalance circuit breaker power supply connecting lines among the figure, and D, E are three-phase imbalance circuit breaker work order lead-out wires.
Embodiment:
Referring to Fig. 2, the utility model is a kind ofly to provide power supply by A, B, C, and A, B connect miniature transformer BK
1Elementary, B, C connect miniature transformer BK
2Elementary, C, A connect miniature transformer BK
3Elementary; BK
1Secondary connection midget relay coil J
1Two ends, BK
2Inferior line connects midget relay coil J
2Two ends, BK
3Inferior line connects midget relay coil J
3Two ends, midget relay J
1End points E is guided to line in top, contact, midget relay J
1The terminal J in contact
1-2 connect midget relay J
2Top, contact, midget relay J
2The terminal J in contact
2-2 connect midget relay J
3Top, contact, midget relay J
3The terminal J in contact
3-2 usefulness lines are drawn out to end points D, and the E end is connected with power supply B, D end and ac contactor coil J
4An end connect ac contactor coil J
4The other end be connected with power supply C.When three-phase voltage is voltage in a basic balance, midget relay J
1J
2J
3All closed, D, E are communicated with, A.C. contactor J
4The energising closure powers to the load.As three phase mains A, B, when the C imbalance reaches 40 percent, midget relay J
1J
2J
3Always there is the one tripping to cut off DE, ac contactor coil J
4Dead electricity, the conveying of three-phase imbalance power supply is cut off in A.C. contactor outage tripping.
Test, facts have proved, the elementary scarce A phase time of power transformer, secondary voltage is AB250V, BC380V, AC130V, during the elementary scarce B phase of power transformer (middle phase), secondary voltage is AB190 volt, BC190 volt, AC380 volt, and the elementary scarce C phase time secondary voltage of power transformer is AB380 volt, BC250 volt, AC130 volt.In the above, the elementary scarce A phase time of power transformer, inferior line voltage AB is 250 volts, and BC is 380 volts, and AC is 130 volts, referring to Fig. 3 miniature transformer BK
3The elementary A that is connected on
1On the C, 130 volts of primary voltages are not enough, cause BK
3Secondary voltage is not enough, can not sticking midget relay J
3, J
3Tripping, D, E isolation, J
4Dead electricity, the conveying of three-phase imbalance power supply is cut off in the A.C. contactor tripping.In the above, the elementary scarce B phase of power transformer (middle phase) secondary voltage AB is 190 volts again, and BC is 190 volts, and AC is 380 volts.Referring to Fig. 4 miniature transformer BK
1Be connected on A, the B, 190 volts of primary voltage deficiencies cause the secondary voltage deficiency can not sticking midget relay J
1, J
2Tripping; Miniature transformer BK
2Be connected on B, the C, 190 volts of primary voltage deficiencies cause secondary voltage not enough, can not sticking midget relay J
2, J
2Tripping, J
1, J
2All tripping D, E isolation, J
4Dead electricity, the three-phase imbalance power delivery is cut off in the A.C. contactor tripping.
Claims (2)
1. three-phase imbalance circuit breaker, its architectural feature is: A, B, C provide power supply, and A, B connect miniature transformer BR
1Elementary, B, C connect miniature transformer BK
2Elementary, C, A connect miniature transformer BK
3Elementary, BK
1Secondary connection midget relay J
1The coil two ends, BK
2Secondary connection midget relay J
2The coil two ends, BK
3Secondary connection midget relay J
3The coil two ends, midget relay J
1Top is drawn out to E end, midget relay J with line
1The terminal J in contact
1-2 connect midget relay J
2Top, midget relay J
2The terminal J in contact
2-2 connect midget relay J
3Top, midget relay J
3The terminal J in contact
3-2 usefulness lines are drawn out to the structure of D end.
2. three-phase imbalance circuit breaker according to claim 1 is further characterized in that midget relay J
1, midget relay J
2, midget relay J
3The structure of series connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320295324 CN203243020U (en) | 2013-05-20 | 2013-05-20 | Three-phase imbalance circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320295324 CN203243020U (en) | 2013-05-20 | 2013-05-20 | Three-phase imbalance circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203243020U true CN203243020U (en) | 2013-10-16 |
Family
ID=49320279
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320295324 Expired - Fee Related CN203243020U (en) | 2013-05-20 | 2013-05-20 | Three-phase imbalance circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203243020U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105024341A (en) * | 2015-08-17 | 2015-11-04 | 佛山电力设计院有限公司 | Circuit breaker and circuit break system having zero-line disconnection and open-phase protection function |
-
2013
- 2013-05-20 CN CN 201320295324 patent/CN203243020U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105024341A (en) * | 2015-08-17 | 2015-11-04 | 佛山电力设计院有限公司 | Circuit breaker and circuit break system having zero-line disconnection and open-phase protection function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131016 Termination date: 20140520 |