CN204177865U - A kind of electricity-measuring meter with earth leakage detection functions - Google Patents

A kind of electricity-measuring meter with earth leakage detection functions Download PDF

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Publication number
CN204177865U
CN204177865U CN201420716131.5U CN201420716131U CN204177865U CN 204177865 U CN204177865 U CN 204177865U CN 201420716131 U CN201420716131 U CN 201420716131U CN 204177865 U CN204177865 U CN 204177865U
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China
Prior art keywords
current
zero
electricity
line
monitoring
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Active
Application number
CN201420716131.5U
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Chinese (zh)
Inventor
曾慰
沈永强
舒元康
金武军
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
State Grid Corp of China SGCC
Huzhou Power Supply Co of State Grid Zhejiang Electric Power Co Ltd
Deqing Power Supply Co of State Grid Zhejiang Electric Power Co Ltd
Hangzhou Hexing Electrical Co Ltd
Original Assignee
State Grid Corp of China SGCC
Huzhou Power Supply Co of State Grid Zhejiang Electric Power Co Ltd
Deqing Power Supply Co of State Grid Zhejiang Electric Power Co Ltd
Hangzhou Hexing Electrical Co Ltd
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Application filed by State Grid Corp of China SGCC, Huzhou Power Supply Co of State Grid Zhejiang Electric Power Co Ltd, Deqing Power Supply Co of State Grid Zhejiang Electric Power Co Ltd, Hangzhou Hexing Electrical Co Ltd filed Critical State Grid Corp of China SGCC
Priority to CN201420716131.5U priority Critical patent/CN204177865U/en
Application granted granted Critical
Publication of CN204177865U publication Critical patent/CN204177865U/en
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Abstract

The utility model discloses a kind of electricity-measuring meter with earth leakage detection functions, comprise the leakage current pick-up unit be installed on subscriber's line, described leakage current pick-up unit comprises the copper-manganese current sensor be installed in phase line and the current transformer be installed on zero line, electricity-measuring meter is provided with zero-sequence current monitoring device and the display device of communication connection, described copper-manganese current sensor is used for phase line current being converted to voltage analog signal and transferring to zero-sequence current monitoring device, described current transformer is used for neutral line current being converted to voltage analog signal and transferring to zero-sequence current monitoring device, described zero-sequence current monitoring device is according to the zero-sequence current of the information monitoring subscriber's line of the copper-manganese current sensor summation current transformer received.The utility model achieves on-line checkingi leakage current, rushes to repair work efficiency, reach the object reducing costs, improve power supply reliability, increase work efficiency after improve RCD tripping operation.

Description

A kind of electricity-measuring meter with earth leakage detection functions
Technical field
The utility model relates to electricity-measuring meter.
Background technology
At present, electricity-measuring meter can not realize on-line monitoring subscriber's line drain conditions.RCD in existing low-voltage distribution apparatus is due to after the tripping operation of user's side leakage electricity reason; pressure power transmission must be carried out to electric leakage circuit during repairing; then from house to house test is closed down to user side switch, just can find out in which family user family concrete and leak electricity.The efficiency of such eliminating leak current fault is lower, and the electricity sales amount of power supply enterprise is influenced, and client's electricity consumption is also a greater impact, and Electricity customers suggestion is larger.
Utility model content
Technical problem to be solved in the utility model just there is provided a kind of electricity-measuring meter with earth leakage detection functions; realize on-line checkingi leakage current; rush to repair work efficiency after improve RCD tripping operation, reach the object reducing costs, improve power supply reliability, increase work efficiency.
For solving the problems of the technologies described above, the utility model adopts following technical scheme: a kind of electricity-measuring meter with earth leakage detection functions, comprise the leakage current pick-up unit be installed on subscriber's line, described leakage current pick-up unit comprises the copper-manganese current sensor be installed in phase line and the current transformer be installed on zero line, electricity-measuring meter is provided with zero-sequence current monitoring device and the display device of communication connection, described copper-manganese current sensor summation current transformer is connected with zero-sequence current monitoring device, described copper-manganese current sensor is used for phase line current being converted to voltage analog signal and transferring to zero-sequence current monitoring device, described current transformer is used for neutral line current being converted to voltage analog signal and transferring to zero-sequence current monitoring device, described zero-sequence current monitoring device is according to the zero-sequence current of the information monitoring subscriber's line of the copper-manganese current sensor summation current transformer received, described display device shows drain conditions.
Preferably, be provided with wireless communication module in described electricity-measuring meter, the drain conditions detected is wirelessly transmitted to background monitoring system through wireless communication module by described electricity-measuring meter.
Preferably, the drain conditions detected is sent to designated mobile phone by described GPRS communication module.
Electricity-measuring meter of the present utility model is provided with zero-sequence current monitoring device, by zero-sequence current monitoring device monitoring zero-sequence current, and Timeliness coverage drain conditions, and by the communication module of electricity-measuring meter, realize collection and the reporting events of electric leakage information.
Therefore, achieve on-line checkingi leakage current, rush to repair work efficiency after improve RCD tripping operation, reach the object reducing costs, improve power supply reliability, increase work efficiency.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the utility model is further described:
Fig. 1 is the leakage current Cleaning Principle figure of electricity-measuring meter.
Embodiment
Definition according to zero-sequence current: the vector in phase electric power system being phase line current and neutral line current.In three-phase and four-line circuit, the phasor of three-phase current and equalling zero, i.e. Ia+Ib+Ic=0.If access a current transformer in three-phase and four-line, at this moment induction current is zero.When occur in circuit to get an electric shock or leak current fault time, have leakage current to flow through in loop, at this moment through the three-phase current phasor and not etc. zero of current transformer, its phasor and be: Ia+Ib+Ic=I (leakage current).The phasor of three-phase current and be not equal to zero, the electric current produced is zero-sequence current.
Residential electricity consumption system normally single-phase-two-wire system, i.e. phase line and center line (zero line).In single-phase-two-wire circuit, when normal electricity consumption, the phasor of phase line and center line and equalling zero.In abnormal electricity consumption as bypass stealing, line fault etc., zero-sequence current is non-vanishing, and this is existing practical application in resident's earth leakage protective device, that is zero-sequence current monitoring device existing application in the prior art.
The utility model, based on above-mentioned principle, realizes the earth leakage detection functions of electricity-measuring meter.On the subscriber line leakage current pick-up unit is installed specifically, and zero-sequence current monitoring device is set at electricity-measuring meter judges zero-sequence current, if zero-sequence current is zero, then circuit leakproof, zero-sequence current is non-vanishing, then line electrical leakage, or has occurred other faults.
Wherein, as shown in Figure 1, described leakage current pick-up unit comprises the copper-manganese current sensor 2 be installed in phase line and the current transformer 1 be installed on zero line, electricity-measuring meter is provided with zero-sequence current monitoring device 3 and the display device of communication connection, described copper-manganese current sensor is used for phase line current being converted to voltage analog signal and transferring to zero-sequence current monitoring device, described current transformer is used for neutral line current being converted to voltage analog signal and transferring to zero-sequence current monitoring device, described zero-sequence current monitoring device is according to the zero-sequence current of the information monitoring subscriber's line of the copper-manganese current sensor summation current transformer received, when zero-sequence current shows electric leakage, described display device shows or alarm drain conditions.
Further, be provided with wireless communication module in described electricity-measuring meter, the drain conditions detected is wirelessly transmitted to background monitoring system through wireless communication module by described electricity-measuring meter.Also be provided with GPRS communication module in described electricity-measuring meter, drain conditions is sent to designated mobile phone by described GPRS communication module.
In normal electricity consumption situation, zero-sequence current should be 0.If there is phase line shorted to earth, when the abnormal electricity consumptions such as phase line bypass or line fault, zero-sequence current is not 0, and zero-sequence current monitoring device is defined as zero-sequence current anomalous event to this situation.When the zero-sequence current that electricity-measuring meter measures exceedes setting value (being defaulted as 20mA), and time duration settings value (being defaulted as 3 seconds), i.e. recording exceptional event, record zero-sequence current anomalous event initial and finish time simultaneously, initial with finish time SOC values, voltage, the parameters such as power are abnormal for electricity consumption situation for electric power sole duty analysis and investigation by obtaining this logout.
The existing Ji Chaopingtai of Utilities Electric Co. is coordinated to complete the remote collection of zero-sequence current or other instantaneous flows, or the active reporting of zero-sequence current anomalous event.

Claims (3)

1. one kind has the electricity-measuring meter of earth leakage detection functions, it is characterized in that: comprise the leakage current pick-up unit be installed on subscriber's line, described leakage current pick-up unit comprises the copper-manganese current sensor be installed in phase line and the current transformer be installed on zero line, electricity-measuring meter is provided with zero-sequence current monitoring device and the display device of communication connection, described copper-manganese current sensor summation current transformer is connected with zero-sequence current monitoring device, described copper-manganese current sensor is used for phase line current being converted to voltage analog signal and transferring to zero-sequence current monitoring device, described current transformer is used for neutral line current being converted to voltage analog signal and transferring to zero-sequence current monitoring device, described zero-sequence current monitoring device is according to the zero-sequence current of the information monitoring subscriber's line of the copper-manganese current sensor summation current transformer received, described display device shows drain conditions.
2. a kind of electricity-measuring meter with earth leakage detection functions according to claim 1, its spy is: be provided with wireless communication module in described electricity-measuring meter, and the drain conditions detected is wirelessly transmitted to background monitoring system through wireless communication module by described electricity-measuring meter.
3. a kind of electricity-measuring meter with earth leakage detection functions according to claim 1, its spy is: be also provided with GPRS communication module in described electricity-measuring meter, and the drain conditions detected is sent to designated mobile phone by described GPRS communication module.
CN201420716131.5U 2014-11-25 2014-11-25 A kind of electricity-measuring meter with earth leakage detection functions Active CN204177865U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420716131.5U CN204177865U (en) 2014-11-25 2014-11-25 A kind of electricity-measuring meter with earth leakage detection functions

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420716131.5U CN204177865U (en) 2014-11-25 2014-11-25 A kind of electricity-measuring meter with earth leakage detection functions

Publications (1)

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CN204177865U true CN204177865U (en) 2015-02-25

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109191701A (en) * 2018-09-11 2019-01-11 国网河北省电力有限公司电力科学研究院 Electric power metering method, system and server

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109191701A (en) * 2018-09-11 2019-01-11 国网河北省电力有限公司电力科学研究院 Electric power metering method, system and server
CN109191701B (en) * 2018-09-11 2020-12-08 国网河北省电力有限公司电力科学研究院 Power metering method, system and server

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