CN205679686U - The external chopper of electric energy meter - Google Patents
The external chopper of electric energy meter Download PDFInfo
- Publication number
- CN205679686U CN205679686U CN201620497112.7U CN201620497112U CN205679686U CN 205679686 U CN205679686 U CN 205679686U CN 201620497112 U CN201620497112 U CN 201620497112U CN 205679686 U CN205679686 U CN 205679686U
- Authority
- CN
- China
- Prior art keywords
- electric energy
- energy meter
- current
- current transformer
- phase
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Emergency Protection Circuit Devices (AREA)
- Breakers (AREA)
Abstract
The utility model discloses a kind of external chopper of electric energy meter, including motor-operating mechanism part, breaker portion, current transformer；Current transformer is arranged in the outlet of electric energy meter and outfan is connected with the controller of motor-operating mechanism part；Current transformer goes out line current the controller of current signal incoming motor-operating mechanism part that will detect for detect electric energy meter；According to the current signal of detection, the controller of motor-operating mechanism part judges whether electric energy meter outlet produces leakage current, and control the outlet of breaker portion disconnection electric energy meter when the leakage current produced is more than setting value, it is ensured that the Electrical Safety of low pressure electricity consumer.This utility model detects leakage current by current transformer, according to the in good time deenergization of leakage current, therefore, it is possible to disconnect user's electric energy in time when leaking electricity or earth fault occurring, it is achieved creepage protection function, and the person of protection electricity consumer and property safety；Additionally, this utility model realizes simple, with low cost, reliability is high.
Description
Technical field
This utility model is specifically related to a kind of external chopper of electric energy meter.
Background technology
Along with developing rapidly of Chinese industrial, people's living standard improves constantly, and various electrical equipments are continuously increased, and plants
Class is various, and power consumption is the most increasing.Safety utilization of electric power has had become as the exclusive requirement during people produce and live, the most right
Stability and the reliability of low tension switch are had higher requirement.
Setting earth leakage protective device in low-voltage distribution system is one of effective measures preventing accident of human electric shock, be also prevent because of
Electric leakage causes electrical fire and the technical measures of electrical equipment damage accident.Earth leakage protective device is at circuit or electrical apparatus insulation
During impaired generation shorted to earth, the anti-person gets an electric shock and the protection electrical equipment of electrical fire, is generally mounted to the socket etc. of each household distribution box
On the main line of on duplexure and ammeter outlet rear end；The earth leakage protective device being wherein arranged on the main line of ammeter outlet rear end is sent out
Wave total protection or the electric leakage of trunk roads, ground connection or the insulation monitoring protective effect of low voltage electric network.Therefore, earth leakage protective is in low pressure
Device for switching there is this very important effect, also result in people and more and more pay attention to.
But, the expense control intelligent electric meter used in the market have employed external expense control on-load switch in a large number to control break-make
Electricity, its structure as shown in Figure 1: the external chopper of electric energy meter includes two parts, i.e. motor-operating mechanism part and chopper portion
Point, the leading-out terminal of expense control intelligent electric meter passes through the breaker portion outlet of the external chopper of electric energy meter and connects low pressure electricity consumer,
The motor-operating mechanism part of the external chopper of electric energy meter is connected with expense intelligent electric meter, obtains the control letter of expense intelligent electric meter
Number: when ammeter subscriber arrearage, expense control intelligent electric meter sends sub-gate signal, and the controller of motor-operating mechanism part receives expense
After the sub-gate signal that control intelligent electric meter sends, control breaker portion tripping operation, disconnect the electric energy supply of low pressure electricity consumer, it is achieved electricity
The function that table arrearage has a power failure；When, after subscriber payment, expense control intelligent electric meter sends switching signal, the control of motor-operating mechanism part
After device receives the switching signal that expense control intelligent electric meter sends, control breaker portion and close a floodgate, connect the electric energy of low pressure electricity consumer
Supply, it is achieved the function of ammeter payment power transmission.
But, the current external chopper of this electric energy meter the most only has the simple functions of chopper；And as electric energy meter
Rear end main line on-load switch, if branch line does not has any protective measure or defencive function, once occurs the person to get an electric shock or electric leakage, existing
The external chopper of some electric energy meters cannot apply any protection act, and this will bring the person and property greatly to threaten to user,
Generation and the property loss of personal safety accident may be caused.
Utility model content
The purpose of this utility model is that providing a kind of realizes simple with creepage protection function and creepage protection function
Single, with low cost external chopper of electric energy meter.
The external chopper of this electric energy meter that this utility model provides, including motor-operating mechanism part and chopper portion
Point, it is characterised in that also include current transformer；Current transformer is arranged in the outlet of electric energy meter, the output of current transformer
End is connected with the controller of motor-operating mechanism part；Current transformer is for detecting the line current that of electric energy meter, and will detect
The controller of the current signal incoming motor-operating mechanism part arrived；The controller of motor-operating mechanism part is according to Current Mutual Inductance
The electric current that device detects judges whether electric energy meter outlet produces leakage current, and sends control when the leakage current produced is more than setting value
System instruction controls breaker portion and disconnects the outlet of electric energy meter, it is ensured that the Electrical Safety of low pressure electricity consumer.
Described electric energy meter is single-phase electric energy meter or three-phase electric energy meter.
When electric energy meter is single-phase electric energy meter, described current transformer has two, respectively live wire current transformer
With neutral line current transformer；Live wire in electric energy meter outlet passes live wire current transformer, and live wire current transformer is used for detecting
The live wire electric current of electric energy meter leading-out terminal also will detect the controller of signal incoming motor-operating mechanism part；In electric energy meter outlet
Zero line passes neutral line current transformer, and neutral line current transformer is for detecting the neutral line current of electric energy meter leading-out terminal and detection being believed
The controller of number incoming motor-operating mechanism part.
Described live wire current transformer and neutral line current transformer, can be simultaneously attached to the inlet wire of breaker portion
End, or it is simultaneously attached to the leading-out terminal of breaker portion.
When electric energy meter is three-phase electric energy meter, described current transformer has four, respectively A phase current mutual inductor, B
Phase current mutual inductor, C phase current mutual inductor and N phase current mutual inductor；A phase power line in electric energy meter outlet passes A phase current
Transformer, A phase current mutual inductor is for detecting the A phase current of electric energy meter leading-out terminal and will detect the incoming motor-operating mechanism of signal
The controller of part；B phase power line in electric energy meter outlet passes B phase current mutual inductor, and B phase current mutual inductor is used for detecting electricity
Can the B phase current of table leading-out terminal the controller of signal incoming motor-operating mechanism part will be detected；C phase in electric energy meter outlet
Power line passes C phase current mutual inductor, and C phase current mutual inductor is for detecting the C phase current of electric energy meter leading-out terminal and detection being believed
The controller of number incoming motor-operating mechanism part；N phase power line in electric energy meter outlet passes N phase current mutual inductor, and N phase is electric
Current transformer is for detecting the N phase current of electric energy meter leading-out terminal and will detect the control of signal incoming motor-operating mechanism part
Device.
Described A phase current mutual inductor, B phase current mutual inductor, C phase current mutual inductor and N phase current mutual inductor, Ke Yiquan
Portion is simultaneously attached to the end of incoming cables of breaker portion, or is all simultaneously attached to the leading-out terminal of breaker portion.
Described current transformer only has one, and is residual current transformer；All outlets of electric energy meter also cross
Residual current transformer, residual current transformer directly detects the leakage current of electric energy meter outlet, and the electric leakage that will detect
The controller of stream size incoming motor-operating mechanism part.
Described residual current transformer is arranged on end of incoming cables or the leading-out terminal of breaker portion.
The external chopper of this electric energy meter that this utility model provides, only by increasing simple current transformer or surplus
Aftercurrent transformer can measure the leakage current of electric energy meter outlet, and controls external chopper according to measuring the leakage current arrived
Deenergization in good time, therefore this utility model can disconnect use in time when electric energy meter user leaks electricity or electricity consumption earth fault occurs
Family electric energy, it is achieved creepage protection function, the person of protection electricity consumer and property safety；Additionally, this utility model realizes simple, one-tenth
This is cheap, and reliability is high.
Accompanying drawing explanation
Fig. 1 is expense control intelligent electric meter and the connection diagram of the external chopper of electric energy meter of background technology.
Fig. 2 is the functional block diagram that this utility model is applied on single-phase electric energy meter.
Fig. 3 is the functional block diagram that this utility model is applied on three-phase electric energy meter.
Detailed description of the invention
It is illustrated in figure 2 the functional block diagram that this utility model is applied on single-phase electric energy meter: 220V electric power incoming line passes through
Entering Intelligent cost control electric energy meter after electric energy meter inlet wire normal circuit breaker, Intelligent cost control electric energy meter has four outlets: expense control indicates
Holding wire, on the controller of its motor-operating mechanism part being connected to the external chopper of electric energy meter, is used for expense control indication signal；
Action feedback signal line, on the controller of its motor-operating mechanism part being connected to the external chopper of electric energy meter, for open circuit
Device opening and closing state feeds back；Power outlet live wire and power outlet zero line, two power outlets are by the external chopper of electric energy meter
Breaker portion connect electricity consumer powering.
In the present embodiment, current transformer has two, respectively live wire current transformer and neutral line current transformer；
Live wire in electric energy meter outlet passes live wire current transformer, and live wire current transformer is for detecting the live wire of electric energy meter leading-out terminal
Electric current also will detect the controller of signal incoming motor-operating mechanism part；Zero line in electric energy meter outlet is mutual through neutral line current
Sensor, neutral line current transformer is for detecting the neutral line current of electric energy meter leading-out terminal and will detect the incoming motor-operating mechanism of signal
The controller of part；By the electric current that current transformer detects, controller judges whether electric energy meter outlet produces leakage current, and
Send control instruction when the leakage current produced is more than setting value and control the outlet of breaker portion disconnection electric energy meter, it is ensured that low pressure
The Electrical Safety of electricity consumer.
In the present embodiment, live wire current transformer and neutral line current transformer are simultaneously attached to the external chopper of electric energy meter
End of incoming cables.Being similar to, live wire current transformer and neutral line current transformer can also be simultaneously attached to going out of breaker portion
Line end.
Additionally, current transformer can also be only with a residual current transformer, the now external chopper of electric energy meter
Two inlet wires or two outlets must be also cross residual current transformers.When current transformer is mutual only with a residual current
During sensor, residual current transformer still can install end of incoming cables or the outlet of the breaker portion of the external chopper of electric energy meter
End.
It is illustrated in figure 3 the functional block diagram that this utility model is applied on three-phase electric energy meter: 380V electric power incoming line has
Four, respectively A phase power line, B phase power line, C phase power line and N phase power line, four power lines are by electric energy meter inlet wire
Entering Intelligent cost control electric energy meter after normal circuit breaker, Intelligent cost control electric energy meter has five outlets: expense control indication signal line, it is even
On the controller of the motor-operating mechanism part receiving the external chopper of electric energy meter, it is used for expense control indication signal；Action feedback letter
Number line, on the controller of its motor-operating mechanism part being connected to the external chopper of electric energy meter, for circuit-breaker switching on-off shape
State is fed back；A phase power outlet, B phase power outlet, C phase power outlet and N phase power outlet, four power outlets pass through electric energy
Off-balancesheet is put the breaker portion of chopper and is connected electricity consumer and power.
In the present embodiment, current transformer is only with a residual current transformer, and all outlets of electric energy meter are simultaneously
Through residual current transformer, residual current transformer directly detects the leakage current of electric energy meter outlet, and will detect
The controller of leakage current incoming motor-operating mechanism part.The electric current that controller detects according to residual current transformer is sentenced
Whether disconnected electric energy meter outlet produces leakage current, and sends control instruction control chopper when the leakage current produced is more than setting value
Part disconnects the outlet of electric energy meter, it is ensured that the Electrical Safety of low pressure electricity consumer
In the present embodiment, residual current transformer is arranged on the leading-out terminal of the external chopper of electric energy meter.It is similar to, residue
Current transformer can also be arranged on the end of incoming cables of the external chopper of electric energy meter.
Additionally, for three-phase electric energy meter, current transformer can also use four, respectively A phase current mutual inductor, B phase
Current transformer, C phase current mutual inductor and N phase current mutual inductor；A phase power line in electric energy meter outlet is mutual through A phase current
Sensor, A phase current mutual inductor is for detecting the A phase current of electric energy meter leading-out terminal and will detect signal incoming motor-operating mechanism portion
The controller divided；B phase power line in electric energy meter outlet passes B phase current mutual inductor, and B phase current mutual inductor is used for detecting electric energy
The B phase current of table leading-out terminal also will detect the controller of signal incoming motor-operating mechanism part；C phase in electric energy meter outlet is electric
Source line passes C phase current mutual inductor, and C phase current mutual inductor is for detecting the C phase current of electric energy meter leading-out terminal and will detect signal
The controller of incoming motor-operating mechanism part；N phase power line in electric energy meter outlet passes N phase current mutual inductor, N phase current
Transformer is for detecting the N phase current of electric energy meter leading-out terminal and will detect the controller of signal incoming motor-operating mechanism part.
When current transformer uses four, four current transformers can all be simultaneously attached to the end of incoming cables of breaker portion, or
Person is all simultaneously attached to the leading-out terminal of breaker portion.
Below as a example by three-phase electric energy meter, operation principle of the present utility model when illustrating to use multiple stage current transformer:
According to Kirchhoff's law, leakage current is the vector sum that three-phase current adds neutral current, i.e.When three-phase and four-line distribution line is properly functioning, threephase load is uneven, now line electrical leakage stream
It is zero, i.e.When a certain phase generation earth fault, then the three-phase current detected adds neutral current
Vector be not zero, and equal to earth-fault current.
The controller of motor-operating mechanism passes through current transformer, gathers the vector current j of each phase of A, B, C, N respectively:
Amplitude (IA、IB、IC、IN) and angle (φA、φB、φC、φN), each vector is resolved into real part (IAI、IBI、ICI、INI) and
Imaginary part (jIA、jIB、jIC、jIN), have:
I=IAI+IBI+ICI+INI
J=jIA+jIB+jIC+jIN
Upon the occurrence of a ground fault, leakage current amplitude I that current transformer gathersPE:
If the transformer ratio of current transformer is K, then earth-fault current IO(d):
IO(d)=K × IPE
Earth leakage protective setting value (setting valve) I of the external chopper of electric energy meterZdG, meet:
IO(d)≤1.3IZdG
In order to avoid misoperation, setting value IZdGWhen should be greater than properly functioning the 2.5 of the leakage current summation of circuit and equipment
～4.0 times, can be set according to site application conditions.
When normally working, the controller Real-time Collection of motor-operating mechanism also calculates leakage current (earth-fault current)
IO(d), and and setting value) IZdGCompare.When occurring electric leakage and leakage current more than setting value, i.e. IO(d)>1.3IZdG, control
Breaker portion performs separating brake action, cuts off the electricity supply.
Being similar to, single-phase electric energy meter is also adopted by identical method and carries out the detection of leakage current.
And for using the form of a current transformer, owing to the power outlet of electric energy meter all passes through Current Mutual Inductance
Device；If the load electricity consumption of electric energy meter is normal, now outlet (either outlet is two lines or the four lines) electric current of electric energy meter
Vector value and should be 0, the leakage current that now current transformer collects is 0, once electric energy meter load electricity consumption occur ground connection
Fault or electric leakage, now what current transformer collected is the most directly amplitude I of leakage currentPE；IPECan with the product of transformer ratio K
Obtain earth-fault current IO(d), the controller of motor-operating mechanism is by IO(d)With setting value IZdGCompare, when leaking electricity
And leakage current more than setting value time, i.e. IO(d)>1.3IZdG, control breaker portion and perform separating brake action, cut off the electricity supply, equally may be used
To realize creepage protection function.
Claims (9)
1. the external chopper of electric energy meter, including motor-operating mechanism part and breaker portion, it is characterised in that also include
Current transformer；Current transformer is arranged in the outlet of electric energy meter, the outfan of current transformer and motor-operating mechanism portion
The controller divided connects；Current transformer is for detecting the line current that of electric energy meter, and the incoming electricity of current signal that will detect
The controller of pneumatic operating mechanism part；The electric current that the controller of motor-operating mechanism part detects according to current transformer judges
Whether electric energy meter outlet produces leakage current, and sends control instruction control chopper portion when the leakage current produced is more than setting value
The outlet of electric energy meter is opened in disjunction, it is ensured that the Electrical Safety of low pressure electricity consumer.
The external chopper of electric energy meter the most according to claim 1, it is characterised in that described electric energy meter is single-phase electric energy meter.
The external chopper of electric energy meter the most according to claim 2, it is characterised in that described current transformer has two,
It is respectively live wire current transformer and neutral line current transformer；Live wire in electric energy meter outlet passes live wire current transformer, fire
Line current transformer is for detecting the live wire electric current of electric energy meter leading-out terminal and will detect signal incoming motor-operating mechanism part
Controller；Zero line in electric energy meter outlet passes neutral line current transformer, and neutral line current transformer is used for detecting electric energy meter outlet
End neutral line current and the controller of signal incoming motor-operating mechanism part will be detected.
The external chopper of electric energy meter the most according to claim 3, it is characterised in that described live wire current transformer and zero
Line current transformer, can be simultaneously attached to the end of incoming cables of breaker portion, or be simultaneously attached to the outlet of breaker portion
End.
The external chopper of electric energy meter the most according to claim 1, it is characterised in that described electric energy meter is three-phase electric energy meter.
The external chopper of electric energy meter the most according to claim 5, it is characterised in that described current transformer has four,
It is respectively A phase current mutual inductor, B phase current mutual inductor, C phase current mutual inductor and N phase current mutual inductor；In electric energy meter outlet
A phase power line passes A phase current mutual inductor, and A phase current mutual inductor is for detecting the A phase current of electric energy meter leading-out terminal and will detect
The controller of signal incoming motor-operating mechanism part；B phase power line in electric energy meter outlet passes B phase current mutual inductor, B phase
Current transformer is for detecting the B phase current of electric energy meter leading-out terminal and will detect the control of signal incoming motor-operating mechanism part
Device；C phase power line in electric energy meter outlet passes C phase current mutual inductor, and C phase current mutual inductor is used for detecting electric energy meter leading-out terminal
C phase current and the controller of signal incoming motor-operating mechanism part will be detected；N phase power line in electric energy meter outlet passes
N phase current mutual inductor, N phase current mutual inductor is used for detecting the N phase current of electric energy meter leading-out terminal and will detect signal incoming electronic
The controller of operating mechanism part.
The external chopper of electric energy meter the most according to claim 6, it is characterised in that described A phase current mutual inductor, B phase are electric
Current transformer, C phase current mutual inductor and N phase current mutual inductor, can all be simultaneously attached to the end of incoming cables of breaker portion, or
Person is all simultaneously attached to the leading-out terminal of breaker portion.
8. according to the external chopper of electric energy meter one of claim 1,2 or 5 Suo Shu, it is characterised in that described current transformer
Only have one, and be residual current transformer；All outlets of electric energy meter are also cross residual current transformer, and residual current is mutual
Sensor directly detects the leakage current of electric energy meter outlet, and the leakage current incoming motor-operating mechanism part that will detect
Controller.
The external chopper of electric energy meter the most according to claim 8, it is characterised in that described residual current transformer is installed
End of incoming cables or leading-out terminal at breaker portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620497112.7U CN205679686U (en) | 2016-05-26 | 2016-05-26 | The external chopper of electric energy meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620497112.7U CN205679686U (en) | 2016-05-26 | 2016-05-26 | The external chopper of electric energy meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205679686U true CN205679686U (en) | 2016-11-09 |
Family
ID=57436499
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620497112.7U Active CN205679686U (en) | 2016-05-26 | 2016-05-26 | The external chopper of electric energy meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205679686U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109342794A (en) * | 2018-08-24 | 2019-02-15 | 浙江正泰电器股份有限公司 | Switching device, electric energy meter take control system and its control method |
| CN109946553A (en) * | 2017-12-21 | 2019-06-28 | 成都长城开发科技有限公司 | Three-phase kilowatt-hour meter and its earth-fault detecting method |
-
2016
- 2016-05-26 CN CN201620497112.7U patent/CN205679686U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109946553A (en) * | 2017-12-21 | 2019-06-28 | 成都长城开发科技有限公司 | Three-phase kilowatt-hour meter and its earth-fault detecting method |
| CN109946553B (en) * | 2017-12-21 | 2021-06-22 | 成都长城开发科技有限公司 | Three-phase electric meter and ground fault detection method thereof |
| CN109342794A (en) * | 2018-08-24 | 2019-02-15 | 浙江正泰电器股份有限公司 | Switching device, electric energy meter take control system and its control method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN208571394U (en) | A kind of photovoltaic power generation box-type substation based on intelligent controller | |
| CN102185290B (en) | Self-recovering method of single-phase earth faults | |
| CN106856332A (en) | A kind of distributed photovoltaic power generation grid-connected system | |
| CN108183462A (en) | Electrical protection device for electrical equipment and electrical equipment | |
| CN106786473A (en) | A kind of arc suppression coil earthing system distribution line single-phase earth fault isolation method | |
| CN106684844B (en) | A kind of power distribution network isolated island recognition methods | |
| CN205679686U (en) | The external chopper of electric energy meter | |
| CN102148495B (en) | Single-phase earth fault self-healing device and system | |
| CN105529681B (en) | The earth leakage protective implementation method of low voltage ungrounded system | |
| CN101950945B (en) | Fireproof intelligent circuit breaker for dynamic detection, static detection and zero cutoff | |
| CN105529685B (en) | A kind of interim IT grounded system switching method of frequency conversion load with TT grounded systems low-pressure system under leak current fault | |
| CN201616596U (en) | Single-phase intelligent type alternating-current distribution box | |
| CN207977729U (en) | A kind of earth leakage protective device | |
| CN208190233U (en) | Landing stage three-phase four-wire system power distribution system secure protective device | |
| CN205157616U (en) | Prevent electric current and steal electric system | |
| CN202495803U (en) | Isolation power supply cabinet used in medical treatment II type place | |
| CN201387994Y (en) | Modular distribution cabinet with grounding knife switch | |
| CN208522450U (en) | Ground protection circuit and motor power supply system | |
| Bjerkan | Efficient fault management using remote fault indicators | |
| CN210092867U (en) | Converter station auxiliary device and converter station | |
| CN207336683U (en) | Transmission lines earth fault investigates warning device | |
| CN201766043U (en) | Dynamic-detection static-detection zero-cutting fireproofing intelligent circuit breaker | |
| CN201616628U (en) | Distribution box for construction technology | |
| CN201985508U (en) | Zero line break protector and connecting structure thereof | |
| CN206099289U (en) | Four -pole circuit breaker |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 411201 28 Bai Shi Road, Jing Kai District, Xiangtan, Hunan Patentee after: Weisheng Energy Technology Co.,Ltd. Address before: 411201 28 Bai Shi Road, Jing Kai District, Xiangtan, Hunan Patentee before: WASION ELECTRIC Co.,Ltd. |