CN203101467U - Differential-type power theft preventing device - Google Patents
Differential-type power theft preventing device Download PDFInfo
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- CN203101467U CN203101467U CN2012206480634U CN201220648063U CN203101467U CN 203101467 U CN203101467 U CN 203101467U CN 2012206480634 U CN2012206480634 U CN 2012206480634U CN 201220648063 U CN201220648063 U CN 201220648063U CN 203101467 U CN203101467 U CN 203101467U
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- relay
- transformer
- mutual inductor
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- 230000005611 electricity Effects 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 1
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Abstract
The utility model discloses a differential-type power theft preventing device. The device comprises a power supply, a relay, a first transformer, a first transformer and a second transformer, wherein a coil of the relay is connected with the first transformer and the second transformer in parallel, the first transformer and the second transformer are respectively connected across an live wire at a wire inlet and an live wire at a wire outlet, and a normally open contact of the relay forms a circuit with the power supply and a trip coil of an inlet wire switch. The first transformer and the second transformer are current transformers. The relay is a current relay. According to the utility model, the device is simple in structure, and while using the device, the current transformers are used for detecting currents at the wire inlet and the wire outlet of a meter; if the meter is in normal operation, the currents detected by the two current transformers are equal; and if a power theft line is connected, the currents detected by the two current transformers are different, and the relay controls the inlet wire switch to be turned off, thereby preventing power theft.
Description
Technical field
The utility model relates to a kind of differential type anti-electricity-theft device.
Background technology
Power consumer is gone up for obtaining the black economy interests by society at present, stealing electric weight occurs repeatedly, particularly common Monophase electric power user, usually adopt the method for zero line ground connection is stolen electric weight, be difficult in the real work search, bring very big difficulty for the work of opposing electricity-stealing, also caused very big economic loss simultaneously to electric power enterprise.
The utility model content
The purpose of this utility model provides a kind of comparison expression anti-electricity-theft device, and volume is little, and is in light weight, easy for installation, has effectively avoided the stealing electricity phenomenon to power consumer.
The utility model adopts following technical proposals:
A kind of differential type anti-electricity-theft device, comprise power supply, relay, first mutual inductor and second mutual inductor, the coil of described relay is in parallel with second mutual inductor with first mutual inductor simultaneously and is connected, described first mutual inductor and second mutual inductor are respectively applied on the live wire that is connected across end of incoming cables live wire and leading-out terminal, and the normally opened contact of relay is formed the loop by the breaking coil of power supply and service entrance switch.
Described first, second mutual inductor is a current transformer.
Described relay is a current relay.
The utility model is simple in structure, only needs during use to use current sensor senses current value size respectively at the inlet wire and the leading-out terminal of gauging table.During operate as normal, two current sensor monitor value equal and opposite in directions; Insert as the stealing circuit, then two sensor to current value vary in size, at this moment, relay coil gets electric, and then can move service entrance switch and disconnect, and makes the electricity filching behavior failure.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Embodiment
As shown in Figure 1, a kind of comparison expression anti-electricity-theft device, comprise power supply 5, relay 4, first mutual inductor 6 and second mutual inductor 7, the coil of described relay 4 is connected in parallel with first mutual inductor 6 and second mutual inductor 7 simultaneously, described first mutual inductor 6 and second mutual inductor 7 are respectively applied on the end of incoming cables live wire L and leading-out terminal live wire L1 that is connected across gauging table 3, and the normally opened contact of relay 4 is formed the loop by the breaking coil 2 of power supply and service entrance switch 1.
Described first, second mutual inductor is a current transformer.
Described relay 4 is a current relay.
It is convenient when the utility model is installed, only need first current transformer 6 and second current transformer 7 to be connected across the live wire L and the leading-out terminal live wire L1 two ends of the end of incoming cables of gauging table 3 respectively, normally opened contact one end of current relay 4 connects an end of switch trip coil, and the other end connects the other end of switch trip coil by power supply 5.
During the normal users power supply, because load circuit normally circulates, the size of current of the live wire L of the end of incoming cables of gauging table 3 and leading-out terminal live wire L1 equates, so first current transformer 6 and second current transformer, 7 induction currents also equate, so the coil of current relay 4 does not have electric current to flow through, normally opened contact is opened.
When outside line is carried out stealing by the method for using zero line ground connection, owing to do leaded end at the output terminal of gauging table 3 inside, be connected with load circuit, so the current value of inlet wire live wire line L end is greater than the current value of leading-out terminal live wire L1, so current value that the current value of first current transformer, 6 inductions is sensed less than second mutual inductor 7, this moment, current relay 4 coils got, thereby the normally opened contact closure of current relay 4, switch trip coil 2 is got, thereby service entrance switch 1 disconnects, and stops the generation of stealing.
Claims (3)
1. differential type anti-electricity-theft device, it is characterized in that: comprise power supply, relay, first mutual inductor and second mutual inductor, the coil of described relay is in parallel with second mutual inductor with first mutual inductor simultaneously and is connected, described first mutual inductor and second mutual inductor are respectively applied on the live wire that is connected across end of incoming cables live wire and leading-out terminal, and the normally opened contact of relay is formed the loop by the breaking coil of power supply and service entrance switch.
2. differential type anti-electricity-theft device according to claim 1 is characterized in that: described first, second mutual inductor is a current transformer.
3. differential type anti-electricity-theft device according to claim 2 is characterized in that: described relay is a current relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012206480634U CN203101467U (en) | 2012-11-30 | 2012-11-30 | Differential-type power theft preventing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012206480634U CN203101467U (en) | 2012-11-30 | 2012-11-30 | Differential-type power theft preventing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203101467U true CN203101467U (en) | 2013-07-31 |
Family
ID=48852857
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012206480634U Expired - Fee Related CN203101467U (en) | 2012-11-30 | 2012-11-30 | Differential-type power theft preventing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203101467U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103779832A (en) * | 2013-11-07 | 2014-05-07 | 国家电网公司 | Electricity-stealing prevention method for low-voltage line |
| CN105891564A (en) * | 2016-03-31 | 2016-08-24 | 国网山东省电力公司平阴县供电公司 | Metering cabinet preventing electricity stealing and realizing intelligent meter reading |
| CN110600330A (en) * | 2019-10-07 | 2019-12-20 | 佛山市中协电器有限公司 | Relay and relay module |
| CN111413530A (en) * | 2020-04-27 | 2020-07-14 | 国网河北省电力有限公司保定供电分公司 | Ammeter case business turn over line sleeve pipe with report to police and drainage function |
-
2012
- 2012-11-30 CN CN2012206480634U patent/CN203101467U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103779832A (en) * | 2013-11-07 | 2014-05-07 | 国家电网公司 | Electricity-stealing prevention method for low-voltage line |
| CN105891564A (en) * | 2016-03-31 | 2016-08-24 | 国网山东省电力公司平阴县供电公司 | Metering cabinet preventing electricity stealing and realizing intelligent meter reading |
| CN110600330A (en) * | 2019-10-07 | 2019-12-20 | 佛山市中协电器有限公司 | Relay and relay module |
| CN111413530A (en) * | 2020-04-27 | 2020-07-14 | 国网河北省电力有限公司保定供电分公司 | Ammeter case business turn over line sleeve pipe with report to police and drainage function |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130731 Termination date: 20181130 |