CN201898318U - Open-phase protector for three-phase current - Google Patents
Open-phase protector for three-phase current Download PDFInfo
- Publication number
- CN201898318U CN201898318U CN2010206545381U CN201020654538U CN201898318U CN 201898318 U CN201898318 U CN 201898318U CN 2010206545381 U CN2010206545381 U CN 2010206545381U CN 201020654538 U CN201020654538 U CN 201020654538U CN 201898318 U CN201898318 U CN 201898318U
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- phase
- contactor
- alternating current
- coil
- open
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Abstract
The utility model provides an open-phase protector for a three-phase current, which belongs to the technical field of AC (alternating current) control and particularly relates to an open-phase load protection device for the three-phase current. The open-phase protector has the main technical characteristics that three AC input wiring terminals A, B and C are respectively connected with one end of three groups of main contacts J1.1, J1.2 and J1.3 of an AC contactor; three AC output wiring terminals a, b and c are respectively connected with the other end of the three groups of main contacts J1.1, J1.2 and J1.3 of the AC contactor; the two ends of a coil J2 of an intermediate relay are connected with the AC input wiring terminals B and C; and after a coil J1 of the AC contactor is connected in series with a normally open contact J2.1 of the intermediate relay, the two ends of the coil J2 of the intermediate relay are connected with the AC input wiring terminals A and B. The open-phase protector has the advantages that the structure is simple, the protection is reliable, the use is safe and the cost is low, and is suitable for being widely popularized and applied.
Description
Technical field
The utility model belongs to alternating current control technology field, specially refers to a kind of load protector that is used for the three-phase electricity phase shortage.
Background technology
The most complex structure of the protective device of existing three-phase electricity phase shortage, production cost is higher, is unfavorable for wide popularization and application.
Summary of the invention
The utility model provides a kind of three-phase electricity phase-lacking protective device reliable, simple in structure, with low cost of protecting.
The utility model is by the following technical solutions: the three-phase electricity open phase protector, comprise three alternating current input wires terminal A, B, C, three alternating current output wiring terminal a, b, c, an A.C. contactor and the circuit that auxiliary relay constitutes, A.C. contactor is made up of coil J1 and three groups of main contacts J1.1, J1.2, J1.3, and auxiliary relay is made up of coil J2 and one group of normally opened contact J2.1; Three alternating current input wires terminal A, B, C are connected with the end of A.C. contactor three groups of main contacts J1.1, J1.2, J1.3 respectively, three alternating current output wiring terminal a, b, c are connected with the other end of A.C. contactor three groups of main contacts J1.1, J1.2, J1.3 respectively, auxiliary relay coil J2 two ends are connected with alternating current input wires terminal B, C, after ac contactor coil J1 and the auxiliary relay normally opened contact J2.1 series connection, two ends are connected with alternating current input wires terminal A, B.
The utility model three-phase electricity open phase protector is simple in structure, and protection is reliable, and is safe in utilization, with low cost, is suitable for wide popularization and application.
Description of drawings
Fig. 1 is an electrical block diagram of the present utility model.
Specific embodiments
Be described further below in conjunction with accompanying drawing.The utility model three-phase electricity open phase protector is a sealing insulation booth; box has three alternating current input wires terminal A outward; B; C; three alternating current output wiring terminal a; b; c; in the box A.C. contactor and the circuit that auxiliary relay constitutes; as shown in Figure 1; A.C. contactor 1 is by coil J1 and three groups of main contacts J1.1; J1.2; J1.3 forms; auxiliary relay is made up of coil J2 and one group of normally opened contact J2.1; three alternating current input wires terminal A that box is outer; B; C respectively with box in three groups of main contacts J1.1 of A.C. contactor; J1.2; the end of J1.3 connects; three alternating current output wiring terminal a that box is outer; b; c respectively with box in three groups of main contacts J1.1 of A.C. contactor; J1.2; the other end of J1.3 connects; auxiliary relay coil J2 two ends and alternating current input wires terminal B; C connects; after ac contactor coil J1 and the auxiliary relay normally opened contact J2.1 series connection, two ends and alternating current input wires terminal A; B connects.
During the actual use of the utility model the utility model three-phase electricity open phase protector; be connected between power supply and the load; the three-phase alternating current of input is connected with three input terminal A, B, C of the utility model three-phase electricity open phase protector; the three-phase alternating current electric loading is connected with three lead-out terminal a, b, c of the utility model three-phase electricity open phase protector; the maximum current of load should be no more than the rated current of A.C. contactor, and is safe in utilization to guarantee.
The ac contactor coil J1 of the utility model three-phase electricity open phase protector and auxiliary relay coil J2 should select the coil of 380 volts of rated voltages for use; its the protection operation principle be: when three-phase alternating current from three input terminal A; B; after the C input; auxiliary relay coil J2 two terminates at B; the C two ends; obtain 380 volts of alternating currents; the auxiliary relay action; normally opened contact J2.1 connects; ac contactor coil J1 two ends are by the J2.1 contact and the A of conducting; 380 volts of voltages of B end input connect; the A.C. contactor action; three groups of main contacts J1.1; J1.2; the J1.3 conducting, three alternating current output wiring terminal a; b; c exports three-phase alternating current.When C phase or the mutually electric phase shortage of B, auxiliary relay coil J2 does not have 380 volts of voltages in two ends, and auxiliary relay normally opened contact J2.1 disconnects, ac contactor coil J1 dead electricity, A.C. contactor main contacts J1.1, J1.2, J1.3 disconnect, and lead-out terminal a, b, c do not have alternating current output; When the mutually electric phase shortage of A, ac contactor coil J1 dead electricity, A.C. contactor main contacts J1.1, J1.2, J1.3 disconnect, and lead-out terminal a, b, c do not have alternating current output, and the open-phase protection effect has been played in load.
Claims (1)
1. three-phase electricity open phase protector; comprise three alternating current input wires terminal A; B; C; three alternating current output wiring terminal a; b; c; an A.C. contactor and the circuit that auxiliary relay constitutes; A.C. contactor is by coil J1 and three groups of main contacts J1.1; J1.2; J1.3 forms; auxiliary relay is made up of coil J2 and one group of normally opened contact J2.1; it is characterized in that: three alternating current input wires terminal A; B; C respectively with three groups of main contacts J1.1 of A.C. contactor; J1.2; the end of J1.3 connects; three alternating current output wiring terminal a; b; c respectively with three groups of main contacts J1.1 of A.C. contactor; J1.2; the other end of J1.3 connects; auxiliary relay coil J2 two ends and alternating current input wires terminal B; C connects; after ac contactor coil J1 and the auxiliary relay normally opened contact J2.1 series connection, two ends and alternating current input wires terminal A; B connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206545381U CN201898318U (en) | 2010-12-08 | 2010-12-08 | Open-phase protector for three-phase current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206545381U CN201898318U (en) | 2010-12-08 | 2010-12-08 | Open-phase protector for three-phase current |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201898318U true CN201898318U (en) | 2011-07-13 |
Family
ID=44256204
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206545381U Expired - Fee Related CN201898318U (en) | 2010-12-08 | 2010-12-08 | Open-phase protector for three-phase current |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201898318U (en) |
-
2010
- 2010-12-08 CN CN2010206545381U patent/CN201898318U/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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110713 Termination date: 20141208 |
|
| EXPY | Termination of patent right or utility model |