CN201887435U - Self-protection device of small-sized transformer - Google Patents
Self-protection device of small-sized transformer Download PDFInfo
- Publication number
- CN201887435U CN201887435U CN201020642591XU CN201020642591U CN201887435U CN 201887435 U CN201887435 U CN 201887435U CN 201020642591X U CN201020642591X U CN 201020642591XU CN 201020642591 U CN201020642591 U CN 201020642591U CN 201887435 U CN201887435 U CN 201887435U
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- Prior art keywords
- transformer
- small
- low
- delay
- sized transformer
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Abstract
The utility model discloses a self-protection device of a small-sized transformer comprising a mutual inductor and a low-voltage universal breaker, which are arranged at the low-voltage side of the small-sized transformer. The small-sized transformer is provided with a control box, a control system of which is controlled by a single chip computer; and the small-sized transformer is also provided with a delay power transmission device and an alarm. As the mutual inductor and the low-voltage universal breaker are arranged at the low-voltage side of the small-sized transformer and the set current of the low-voltage universal breaker is adjusted to be three times of the rated current of the controlled transformer, the transformer instantaneously trips when being severely overloaded; and when the delay tripping is started, if the load is reduced, another relay is closed and the delay tripping is released to avoid false outage. Therefore, the small-sized transformer can be automatically powered off under the overload condition so that the aim of protecting the transformer is achieved; and simultaneously, a delay reclosing control system is arranged so that the reliability of power supply is greatly improved.
Description
Technical field
The utility model belongs to miniature transformer maintenance technology field, is specifically related to a kind of miniature transformer automatic holding device.
Background technology
Transformer is the device that changes alternating voltage, it is electrical energy transfer or as the critical elements of signal transmission, the function of have that AC voltage conversion, circuit lotus root are closed, impedance conversion and circuit being isolated, it is indispensable important component part in the electric power system, in case break down, will influence normal power supply, cause inconvenience.Miniature transformer is carried out the important assurance that necessary protection is the normal operation of transformer, and at present, the protected mode of miniature transformer is generally vacuum circuit-breaker one Microcomputer Protection (or electromagnetic relay protection), or adopts the ring main unit of on-load switch one fuse combination.Though but the former has the disengagement failure short circuit current, is not subjected to the restriction of transformer capacity and protection the superior and the subordinate to cooperate comparatively flexible; trip time and definite value advantage such as can adjust; but price is higher; among the latter on-load switch cut-off the transfer current value sometimes can only the disjunction load current; but can not the disengagement failure electric current, so also cause very big potential safety hazard easily.
The utility model content
The purpose of this utility model is to avoid above-mentioned weak point of the prior art, and a kind of safety and stability is provided, guarantees power supply reliability, effectively protects the miniature transformer automatic holding device of transformer.
A kind of miniature transformer automatic holding device comprises the instrument transformer and the low pressure universal circuit breaker that are arranged on the miniature transformer low-pressure side, and described miniature transformer is provided with control box, and the control system of described control box is a Single-chip Controlling.
Described miniature transformer is provided with time-delay power transmission device and alarm.
Because the utility model is provided with instrument transformer and low pressure universal circuit breaker in the low-pressure side of miniature transformer; low pressure universal circuit breaker setting current is adjusted into three times of institute's control transformer rated current; instantaneous tripping operation when the serious overload of transformer; after delay tripping starts; if load reduces; at this moment another relay adhesive; remove delay tripping and prevent wrong diagnosis; this shows; the utility model can cut off the power supply under the miniature transformer overload situations voluntarily; reach the purpose of protection transformer, have time-delay reclosing control system simultaneously, improve the reliability of power supply greatly.
Description of drawings
Below in conjunction with accompanying drawing the utility model is further described:
Fig. 1 is a structural representation of the present utility model.
Embodiment
As shown in Figure 1: a kind of miniature transformer automatic holding device, comprise the instrument transformer 1 and the low pressure universal circuit breaker 2 that are arranged on the miniature transformer low-pressure side, described miniature transformer is provided with control box 3, and the control system of described control box 3 is a Single-chip Controlling.Described miniature transformer is provided with time-delay power transmission device and alarm.
Utilize the utility model, in the miniature transformer low-pressure side instrument transformer 1 and low pressure universal circuit breaker 2 are set, low pressure universal circuit breaker 2 setting currents are adjusted into three times of institute's control transformer rated current, instantaneous tripping operation when the serious overload of transformer.Transformer is in operation, if surpass 100% o'clock alarm equipment alarm of its rated current, and the delay cut-off device starts, in overload (time is adjustable) low pressure universal circuit breaker 2 tripping operations after 120 minutes continuously, the step down side outage, the power transmission device of delaying time simultaneously starts, reclosing after five minutes, and tripping operation back time-delay for the second time send electricity to prolong ten minutes again; When transformer overloads 160% the time, the tripping operation delayed startup, in overload low pressure universal circuit breaker 2 tripping operations after 30 minutes continuously, the transformer outage, the power transmission device of delaying time simultaneously starts, reclosing after five minutes, tripping operation back time-delay for the second time send electricity to prolong ten minutes again; When transformer overloads 200% the time, tripping relay adhesive but do not delay time, 2 tripping operations of low pressure universal circuit breaker, the power transmission device of delaying time simultaneously starts, reclosing after ten minutes; After delay tripping started, if load reduces, another relay adhesive was at this moment removed delay tripping and is prevented wrong diagnosis.Utilize the utility model, when miniature transformer transships, can cut off the power supply voluntarily, reach the purpose of protection transformer, have time-delay reclosing control system, improve the reliability of power supply greatly.
Claims (2)
1. a miniature transformer automatic holding device comprises the instrument transformer and the low pressure universal circuit breaker that are arranged on the miniature transformer low-pressure side, and it is characterized in that: described miniature transformer is provided with control box, and the control system of described control box is a Single-chip Controlling.
2. miniature transformer automatic holding device as claimed in claim 1 is characterized in that: described miniature transformer is provided with time-delay power transmission device and alarm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020642591XU CN201887435U (en) | 2010-12-01 | 2010-12-01 | Self-protection device of small-sized transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020642591XU CN201887435U (en) | 2010-12-01 | 2010-12-01 | Self-protection device of small-sized transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201887435U true CN201887435U (en) | 2011-06-29 |
Family
ID=44184981
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020642591XU Expired - Fee Related CN201887435U (en) | 2010-12-01 | 2010-12-01 | Self-protection device of small-sized transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201887435U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019144580A1 (en) * | 2018-01-25 | 2019-08-01 | 广东中鹏电气有限公司 | Transformer overload protection method based on electronic intelligent low-voltage circuit breaker |
-
2010
- 2010-12-01 CN CN201020642591XU patent/CN201887435U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019144580A1 (en) * | 2018-01-25 | 2019-08-01 | 广东中鹏电气有限公司 | Transformer overload protection method based on electronic intelligent low-voltage circuit breaker |
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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: 20110629 Termination date: 20111201 |