CN203071558U - Multi-function distribution transformation overload intelligent protective device - Google Patents
Multi-function distribution transformation overload intelligent protective device Download PDFInfo
- Publication number
- CN203071558U CN203071558U CN 201220729461 CN201220729461U CN203071558U CN 203071558 U CN203071558 U CN 203071558U CN 201220729461 CN201220729461 CN 201220729461 CN 201220729461 U CN201220729461 U CN 201220729461U CN 203071558 U CN203071558 U CN 203071558U
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- protective device
- contactor
- relay
- intelligent protective
- intelligent
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Abstract
The utility model discloses a multi-function distribution transformation overload intelligent protective device. The intelligent protective device is characterized in that an over-current transformer is arranged on distribution lines provided with air switches, AC contactors and breakers. A fuse is serially connected on a zero line and one of live wires. An intermediate relay, an alarm lamp, a time relay and an AC contactor are further in parallel connection. A thermal relay is serially connected with the AC contactor. By adopting the above-mentioned settings, the intelligent protective device has functions of over-current protection, overheating protection, resetting, and intelligent transmission. By adopting the photoelectric alarm device, the intelligent protective device can perform timely and continuous protection on distribution transformation. Observation is further facilitated.
Description
Technical field
The utility model relates to a kind of distribution transforming overload intelligent protection device, is a kind of multi-functional distribution transforming overload intelligent protection device of light harvesting electricity one specifically.
Background technology
Existing distribution transforming overload intelligent protection device; just simply continue to use the circuit breaker of current protection design, the rated current of distribution transforming is underused in this design, as wants protective device to increase function; present distribution transforming overload intelligent protection device can not be realized device damage rate height.
Summary of the invention
The purpose of this utility model is the multi-functional distribution transforming overload intelligent protection device that a kind of light harvesting electricity one is provided.
To achieve these goals, the utility model is provided with the overcurrent instrument transformer at the distribution line that has air switch, A.C. contactor and circuit breaker, zero line and wherein a live wire be in series with fuse, be parallel with auxiliary relay, alarm lamp, the time relay and A.C. contactor, thermal relay and A.C. contactor are cascaded.
By above setting, the utlity model has overcurrent protection, overtemperature protection, reset function and intelligent transfer function adopt light, electric alarm device, in time constantly distribution transforming are protected, and are convenient to observe.
Description of drawings
Now the utility model is described in further detail by reference to the accompanying drawings.
Fig. 1 is circuit diagram of the present utility model.
Among the figure: 1, air switch, 2, A.C. contactor, 3, circuit breaker, 4, current transformer, 5, zero line, 6, live wire, 7, fuse, 8, auxiliary relay, 9, alarm lamp, 10, the time relay, 11, A.C. contactor, 12, thermal relay, 13, reset button, 14, acquisition terminal.
Embodiment
As shown in Figure 1, the utility model is provided with overcurrent instrument transformer 4 at the distribution line that has air switch 1, A.C. contactor 2 and circuit breaker 3, zero line 5 and wherein a live wire 6 be in series with fuse 7, be parallel with auxiliary relay 8, alarm lamp 9, the time relay 10 and A.C. contactor 11, thermal relay 12 is cascaded with A.C. contactor 11.
By above setting, the utlity model has following function:
1, overcurrent protection: be example with 250 kilovolt-amperes of distribution transformings; his rated current is 360.9A; current transformer 4 is 400A/5A; when main circuit current reaches 360.9A; current transformer 4 secondary side currents are about 4.5A, and we can be adjusted into 4.5A with the overcurrent relay KA that is connected on the current transformer 4, report to the police during greater than 4.5A; because momentary overload is little to the transformer influence, we can be according to 10 tripping operations of actual conditions setting-up time relay.Under the operating state, when distribution transforming operating current during greater than rated current, secondary loop current will be greater than the electric current 4.5A that sets, overcurrent relay kA action, the normally opened contact closure of overcurrent relay kA, alarm lamp 9 is started working, simultaneously auxiliary relay 8, time relay kT coil electricity.Auxiliary relay 10 normally opened contact closures, self-locking; alarm lamp 9 is reported to the police all the time; the time relay 10 picks up counting simultaneously; after the time arrives the time that we set in advance; the time-delay break contact of the time relay 10 disconnects; quit work after the coil of A.C. contactor 11 is de-energized, thereby play the effect of protecting transformer.
2, overtemperature protection: the temperature of transformer should not be above 75 ℃.We select for use and have normally-closed contact, and operating temperature is that 75 ℃ thermal relay 12 is connected in A.C. contactor 11 coil control circuits, and when the transformer temperature was higher than 75 ℃, normally-closed contact disconnected, and A.C. contactor 11 quits work.Thereby play the effect of protection transformer.
3, reset function: after the protective device action, alarm lamp is reported to the police all the time, clicks reset button 13 after the staff fixes a breakdown, auxiliary relay 8 coil blackouts, self-locking release, thereby alarm release.
4, intelligence transmission: alarm signal is connected to the existing acquisition terminal 14 of distribution board, alarm signal can be transferred to the power information acquisition system by acquisition terminal 14, we just can monitor distribution transforming safe operation situation in real time by acquisition system.
Claims (1)
1. multi-functional distribution transforming overload intelligent protection device; it is characterized in that: be provided with the overcurrent instrument transformer at the distribution line that has air switch, A.C. contactor and circuit breaker; zero line and wherein a live wire be in series with fuse; be parallel with auxiliary relay, alarm lamp, the time relay and A.C. contactor, thermal relay and A.C. contactor are cascaded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220729461 CN203071558U (en) | 2012-12-26 | 2012-12-26 | Multi-function distribution transformation overload intelligent protective device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220729461 CN203071558U (en) | 2012-12-26 | 2012-12-26 | Multi-function distribution transformation overload intelligent protective device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203071558U true CN203071558U (en) | 2013-07-17 |
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ID=48770309
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220729461 Expired - Fee Related CN203071558U (en) | 2012-12-26 | 2012-12-26 | Multi-function distribution transformation overload intelligent protective device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203071558U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105092945A (en) * | 2015-07-21 | 2015-11-25 | 国家电网公司 | Zero-line overcurrent alarm device for power distribution network |
| CN106848894A (en) * | 2017-04-13 | 2017-06-13 | 国网安徽省电力公司明光市供电公司 | A kind of autoamtic protection device for forming of transformation case |
-
2012
- 2012-12-26 CN CN 201220729461 patent/CN203071558U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105092945A (en) * | 2015-07-21 | 2015-11-25 | 国家电网公司 | Zero-line overcurrent alarm device for power distribution network |
| CN106848894A (en) * | 2017-04-13 | 2017-06-13 | 国网安徽省电力公司明光市供电公司 | A kind of autoamtic protection device for forming of transformation case |
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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: 20130717 Termination date: 20131226 |