CN203606414U - Transformer iron-core grounding current monitoring device - Google Patents
Transformer iron-core grounding current monitoring device Download PDFInfo
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- CN203606414U CN203606414U CN201320316066.2U CN201320316066U CN203606414U CN 203606414 U CN203606414 U CN 203606414U CN 201320316066 U CN201320316066 U CN 201320316066U CN 203606414 U CN203606414 U CN 203606414U
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Abstract
The utility model discloses a transformer iron-core grounding current monitoring device, which comprises a transformer iron-core grounding current sensor, a power supply and a communication interface. The power supply and the communication interface are connected with a sensor. The sensor comprises a central control circuit, a power supply circuit, a double-current sensor module and an intelligent electronic unit connected with the central control circuit through the communication interface. The transformer iron-core grounding current sensor comprises an aluminum shell, a double-current sensor module and an iron-core grounding current processing module. The double-current sensor module comprises two large-aperture current transformers, wherein an iron-core grounding copper bar or a grounding leading-down wire passes through the two large-aperture current transformers. According to the technical scheme of the utility model, the variation condition of the leakage current of a grounded transformer iron core can be monitored in real time. Meanwhile, the grounded leakage current is monitored and RS485 photoelectric isolation signals are directly outputted and integrally measured. Moreover, by means of an LED alarm indicating lamp arranged on a shell, the grounding condition of the iron core can be reminded at night.
Description
Technical field
The utility model relates to a kind of monitoring device, relates in particular to a kind of transformer iron core grounding current monitoring device.
Background technology
The effect of transformer is many-sidedly can not only boosted voltage electric energy be delivered to electricity consumption area, can also be use voltages at different levels lower voltage, to meet the needs of electricity consumption.In a word, boost and all must be completed by transformer with step-down.Transmit in the process of electric energy in electric system, will inevitably produce voltage and the loss of power two parts, in the time carrying same power, voltage loss and voltage are inversely proportional to, square being inversely proportional to of power attenuation and voltage.Utilize transformer to improve voltage, reduced power transmission loss.
Power transformer is one of equipment of most critical in electric system, is often regarded as " heart " of electrical network, and its normal operation is the important guarantee to power system security, reliable, high-quality, economical operation.When power transformer normally moves, iron core must have some reliable grounds, otherwise iron core can produce suspended voltage or multipoint earthing of iron core over the ground and produce heating accident, the safety of serious threat transformer and electrical network.In Large-scale High-Pressure electrical equipment power transformer, due to iron core grounding fault and other abnormal conditions, in insulating oil, can produce multiple gases.The usual detection means of power department is to detect the failure gas being dissolved in insulating oil, and to the insulating oil of equipment sample laggard row gas chromatographic analysis and with clamp on amperemeter survey transformer core draw the electric current going between under the ground connection of grounding sleeve outward, to find as soon as possible latency fault, it is the Main Means that guarantees large-scale power transformer safe operation and conventional maintenance.But in the time detecting multipoint earthing of iron core phenomenon, distinguishing faint earth-fault current and strong electromagnetic environmental interference etc. has certain difficulty, therefore, this method step is many, complicated operation, and can not on-line analysis, the precision of detection and ageingly all have problems.。
Utility model content
The purpose of this utility model is to provide a kind of transformer iron core grounding current monitoring device, the leakage current of Real-Time Monitoring transformer core grounding can be grasped at any time the variation of core current and report to the police in good time, be convenient to control and the scheduled outage maintenance of electric equipment under operation conditions, solve the shortcoming that prior art exists.
The utility model adopts following technical scheme to realize:
A kind of transformer iron core grounding current monitoring device, comprise transformer iron core grounding current sensor, and the power supply being connected with sensor and communication interface, it is characterized in that, described sensor comprises the central control circuit that drives each module running, the power circuit of monitoring device electric energy is provided to provide with central control circuit, the double-current sensor assembly in order to detect being connected with central control circuit, described transformer iron core grounding current sensor comprises aluminium shell, double-current sensor assembly, iron core grounding current processing module, described double-current sensor assembly is made up of two large aperture current transformers, connect with central control circuit, iron core grounding copper bar or down conductor are through two large aperture current transformers.
Further, also comprise that a photoelectricity isolates 485 communication modules, described photoelectricity is isolated 485 communication modules and is connected with central control circuit, and described sensor is connected with the intelligent electronic device of central control circuit by communication interface.
Further, also comprise a LED light emitting module, described LED light emitting module comprises LED drive circuit and LED luminotron, and described LED light emitting module is connected with described central control circuit, in order to start LED variable color (green and red) luminous alarm.
The useful technique effect that the utility model possesses is:
The changing condition of leakage current that can Real-Time Monitoring transformer core grounding, comprise the monitoring of earth leakage electric current and directly exported 485 photoelectricity isolation signals, integrated measuring, and by the LED alarm lamp on shell 1 quality in night prompting iron core grounding situation, reduced the accidents such as the power transformer causing because of leakage current rising etc. burns, power failure generation may, cause the have a power failure social harmful effect that causes and the production loss of social undertakings stopping accident.
Accompanying drawing explanation
Fig. 1 is installation and the communication scheme of the utility model transformer iron core grounding current monitoring device.
Fig. 2 is the structural representation of the utility model transformer iron core grounding current monitoring device.
Embodiment
By the description to embodiment below; to more contribute to public understanding the utility model; but specific embodiment given applicant can't be considered as to the restriction to technical solutions of the utility model, any definition to parts or technical characterictic change and/or to one-piece construction do form and immaterial conversion all should be considered as the protection domain that the technical solution of the utility model limits.
As depicted in figs. 1 and 2, this iron core of transformer ground current monitoring device comprises transformer iron core grounding current sensor, external dc power adapter power supply, aviation plug 3 and aluminium shell 1, wherein said sensor comprises the central control circuit that drives each module running, the power circuit of monitoring device electric energy is provided to provide with central control circuit, the double-current sensor assembly in order to detect being connected with central control circuit, and be connected with central control circuit by communication interface be arranged on the intelligent electronic device 5 (IED) in intelligent convergence control cabinet 4, detect data to further process.Described transformer iron core grounding current sensor comprises aluminium shell 1, double-current sensor assembly, iron core grounding current processing module, described double-current sensor assembly is made up of two large aperture current transformers, iron core grounding copper bar or down conductor are through two large aperture current transformers, and the first current transformer is measured little electric current (0-1000mA), the second current transformer is measured large electric current (1-10A).
24V direct current external power adapter described in central control circuit is for providing power supply to described transformer iron core grounding current sensor, described transformer iron core grounding current sensor gathers the leakage current of iron core grounding through the iron core grounding band iron 2 of transformer, communication and the power supply of described aviation plug 3 to interior connecting sensor, externally connects communication and power supply integration cable 6.
Described central control circuit is selected the low-power consumption 32-bit microprocessor that has adopted Tail-Chaining interrupt techniques.485 described communication interfaces are selected photoelectricity isolation unified communications module, have that volume is little, the feature of strong interference immunity.
In the time of staff's daytime or night inspection power transformer, pass through or rest on electrical transformer cores position, the LED luminous indicating lamp of transformer iron core grounding current monitoring device is if green, represent that iron core grounding current value is in normal range (0-300mA), if red iron core grounding current value is in overrun condition (> 300mA).Can reach like this staff and be no matter by intelligent electronic device 5 and can check on long-range daemon software monitoring or local daytime or night inspection the running status of understanding transformer core grounding leakage current, understand the situation whether power transformer exists multipoint earthing, improve the intelligent level of transformer station, improve the status monitoring effect to important electric power primary equipment, promote repair based on condition of component level.The power transformation staff of Utilities Electric Co. by the monitoring situation to transformer iron core grounding current, analyzes the fault type that transformer core exists, and turnaround plan that can reasonable arrangement transformer, accomplishes reasonable maintenance, and it is required good to repair.
Certainly; the utility model can also have other various embodiments; in the situation that not deviating from the utility model spirit and essence thereof; those of ordinary skill in the art can make various corresponding changes and distortion according to the utility model, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the utility model.
Claims (3)
1. a transformer iron core grounding current monitoring device, comprise transformer iron core grounding current sensor, and the power supply being connected with sensor and communication interface, it is characterized in that, described sensor comprises the central control circuit that drives each module running, the power circuit of monitoring device electric energy is provided to provide with central control circuit, the double-current sensor assembly in order to detect being connected with central control circuit, described transformer iron core grounding current sensor comprises aluminium shell, double-current sensor assembly, iron core grounding current processing module, described double-current sensor assembly is made up of two large aperture current transformers, connect with central control circuit, iron core grounding copper bar or down conductor are through two large aperture current transformers.
2. transformer iron core grounding current monitoring device according to claim 1, it is characterized in that, also comprise that a photoelectricity isolates 485 communication modules, described photoelectricity is isolated 485 communication modules and is connected with central control circuit, and described sensor is connected with the intelligent electronic device of central control circuit by communication interface.
3. transformer iron core grounding current monitoring device according to claim 1 and 2, it is characterized in that, also comprise a LED light emitting module, described LED light emitting module comprises LED drive circuit and LED luminotron, and described LED light emitting module is connected with described central control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320316066.2U CN203606414U (en) | 2013-06-04 | 2013-06-04 | Transformer iron-core grounding current monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320316066.2U CN203606414U (en) | 2013-06-04 | 2013-06-04 | Transformer iron-core grounding current monitoring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203606414U true CN203606414U (en) | 2014-05-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320316066.2U Expired - Fee Related CN203606414U (en) | 2013-06-04 | 2013-06-04 | Transformer iron-core grounding current monitoring device |
Country Status (1)
| Country | Link |
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| CN (1) | CN203606414U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109991501A (en) * | 2017-12-29 | 2019-07-09 | 国网河南省电力公司栾川县供电公司 | Transformer core grounding wireless program-controlled sampling apparatus |
-
2013
- 2013-06-04 CN CN201320316066.2U patent/CN203606414U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109991501A (en) * | 2017-12-29 | 2019-07-09 | 国网河南省电力公司栾川县供电公司 | Transformer core grounding wireless program-controlled sampling apparatus |
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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: 20140521 Termination date: 20150604 |
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| EXPY | Termination of patent right or utility model |