CN204205555U - A kind of protective device for low voltage electric network - Google Patents
A kind of protective device for low voltage electric network Download PDFInfo
- Publication number
- CN204205555U CN204205555U CN201420638355.9U CN201420638355U CN204205555U CN 204205555 U CN204205555 U CN 204205555U CN 201420638355 U CN201420638355 U CN 201420638355U CN 204205555 U CN204205555 U CN 204205555U
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- CN
- China
- Prior art keywords
- phase
- circuit breaker
- low voltage
- protective device
- electric network
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- 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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Abstract
The utility model discloses a kind of protective device for low voltage electric network, and miniature circuit breaker ZK is connected on step down side, the three-phase loop of described miniature circuit breaker ZK is respectively equipped with a relay, each described relay be equipped with three normally opened contacts.The utility model can monitor phase shortage, as long as any phase phase shortage in the middle of three-phase phase line, lead-in circuit breaker all can not close a floodgate, protection low voltage electric network.Thus protective device equipment exempts from the harm that phase shortage is burnt, protection personal safety.
Description
Technical field
The utility model relates in low pressure 400V system the protective device monitoring for phase shortage, control.
Background technology
Low pressure lead-in circuit breaker is conventional electric equipment; the low pressure of current use is carried out circuit breaker and is not installed phase-lacking protective device; if high voltage phase loss or the problem of transformer own cause phase shortage; and this phase is not within the under-voltage coil protect scope of low pressure lead-in circuit breaker; lead-in circuit breaker does not trip; easily cause electrical network phase shortage to endanger, often the equipment such as motor damage, household electrical appliance, lose larger.Transformer neutral point not solidly grounded system time, because phase shortage causes null offset, zero line low pressure raise, the person is damaged.
Utility model content
Technical problem to be solved in the utility model realizes a kind of device that can carry out low voltage electric network open-phase protection.
To achieve these goals; the technical solution adopted in the utility model is: a kind of protective device for low voltage electric network; miniature circuit breaker ZK is connected on step down side, the three-phase loop of described miniature circuit breaker ZK is respectively equipped with a relay, and each described relay is equipped with three normally opened contacts.
The three-phase loop of described miniature circuit breaker ZK was last is respectively equipped with an indicator light.
Described miniature circuit breaker ZK is 10A, and model is C65H/10A/4P, and described relay is Small Form-Factor Pluggable relay, and model is HH54P/10A.
The utility model can monitor phase shortage, as long as any phase phase shortage in the middle of three-phase phase line, low pressure lead-in circuit breaker all trips, protection low voltage electric network.Thus protective device equipment exempts from the harm that phase shortage is burnt, protection personal safety.
Accompanying drawing explanation
Below the content that width accompanying drawing every in the utility model specification is expressed is briefly described:
Fig. 1 is the utility model electrical block diagram.
Embodiment
As shown in Figure 1; miniature circuit breaker ZK is connected on the inlet wire side of transformer low voltage lead-in circuit breaker by protective device for low voltage electric network; and a relay is respectively equipped with on three-phase (A, B, C three-phase) loop of miniature circuit breaker ZK; be respectively C1, C2, C3; each relay is equipped with three normally opened contacts; namely C11, C12, C13 are C1 relay three pairs of normally opened contacts, and C21, C22, C23 are C2 relay three pairs of normally opened contacts, and C31, C32, C33 are C3 relay three pairs of normally opened contacts.Normally opened contact C11, C21, C31 series connection is in ZK outgoing line side A phase, and normally opened contact C12, C22, C32 series connection is in ZK outgoing line side B phase, and normally opened contact C13, C23, C33 series connection is in ZK outgoing line side C phase.Wherein a, b, c, N1 are four binding posts.
Miniature circuit breaker ZK is 10A, and model is C65H/10A/4P, and relay is Small Form-Factor Pluggable relay, model is HH54P/10A, has both saved repacking cost, also convenient installation, check on-state for convenience, lastly in the three-phase loop of miniature circuit breaker ZK be respectively equipped with an indicator light, X1, X2, X3 is respectively yellow, green, red indicator light, thus can channel status be demonstrated.
Specific works principle is as follows: close ZK, X1, X2, X3 obtain electric lighting, C1, C2, C3 adhesive, and A phase passes through C1-C13-C23-C33-c, N phase by ZK to N1 by A1-C11-C21-C31-a, B phase by B1-C12-C22-C32-b, C phase.As long as A, B, C lack a phase arbitrarily, a, b, c do not have electricity to export, and the control power supply of such low pressure lead-in circuit breaker is 220V, be connected on aN1 or bN1 or cN1 can, if the control power supply of circuit breaker is 380V, be connected on ab or bc or ac can.A, B, C, N are connected on the inlet wire side of transformer low voltage lead-in circuit breaker, and the yellowish green red indicator light of X1, X2, X3 monitors A, B, C three-phase.Control power supply and do not have electricity, low pressure lead-in circuit breaker just can not close a floodgate, and plays open-phase protection effect.Low cost, economic and practical simultaneously.
Above by reference to the accompanying drawings to invention has been exemplary description; obvious the utility model specific implementation is not subject to the restrictions described above; as long as have employed the improvement of the various unsubstantialities that method of the present invention is conceived and technical scheme is carried out; or design of the present invention and technical scheme directly applied to other occasion, all within protection range of the present utility model without to improve.
Claims (3)
1. a protective device for low voltage electric network, is characterized in that: be connected on step down side with a miniature circuit breaker ZK, the three-phase loop of described miniature circuit breaker ZK is respectively equipped with a relay, and each described relay is equipped with three normally opened contacts.
2. protective device for low voltage electric network according to claim 1, is characterized in that: the three-phase loop of described miniature circuit breaker ZK was last is respectively equipped with an indicator light.
3. protective device for low voltage electric network according to claim 1 and 2, is characterized in that: described miniature circuit breaker ZK is 10A, and model is C65H/10A/4P, and described relay is Small Form-Factor Pluggable relay, and model is HH54P/10A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420638355.9U CN204205555U (en) | 2014-10-29 | 2014-10-29 | A kind of protective device for low voltage electric network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420638355.9U CN204205555U (en) | 2014-10-29 | 2014-10-29 | A kind of protective device for low voltage electric network |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204205555U true CN204205555U (en) | 2015-03-11 |
Family
ID=52663475
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420638355.9U Expired - Fee Related CN204205555U (en) | 2014-10-29 | 2014-10-29 | A kind of protective device for low voltage electric network |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204205555U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106159901A (en) * | 2016-08-19 | 2016-11-23 | 宝亨新电气（集团）有限公司 | A kind of phase-lacking protective device of combined transformer |
-
2014
- 2014-10-29 CN CN201420638355.9U patent/CN204205555U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106159901A (en) * | 2016-08-19 | 2016-11-23 | 宝亨新电气（集团）有限公司 | A kind of phase-lacking protective device of combined transformer |
| CN106159901B (en) * | 2016-08-19 | 2018-05-22 | 宝亨新电气（集团）有限公司 | A kind of phase-lacking protective device of combined transformer |
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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: 20150311 Termination date: 20191029 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |