CN2419602Y - Multifunctional kilowatt meter - Google Patents
Multifunctional kilowatt meter Download PDFInfo
- Publication number
- CN2419602Y CN2419602Y CN 00208007 CN00208007U CN2419602Y CN 2419602 Y CN2419602 Y CN 2419602Y CN 00208007 CN00208007 CN 00208007 CN 00208007 U CN00208007 U CN 00208007U CN 2419602 Y CN2419602 Y CN 2419602Y
- Authority
- CN
- China
- Prior art keywords
- zero sequence
- switch
- control circuit
- sequence current
- hour meter
- 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.)
- Expired - Fee Related
Links
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- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model relates to a multifunctional kilowatt meter. The utility model is formed by that a switch and a zero sequence current transformer are arranged on two roots of current incoming lines in present kilowatt meters, and a control circuit is connected between the control circuit switch and the zero sequence current transformer. Actions of the switch are driven by signals through the control circuit, the signals are detected from two roots of the current incoming lines by taking advantage of the zero sequence current transformer, and a power source of the incoming lines is cut off. The utility model can effectively prevent various behaviors of the fraudulent use of the electricity, and the utility model has the functions of earth leakage protection and over-voltage protection.
Description
The utility model is a kind of power consumption measuring apparatus.
Existing watt-hour meter function singleness does not have the function prevent stealing, and the electric stealer often by with the watt-hour meter short circuit or establish earth terminal in addition, makes electric current without watt-hour meter, perhaps adopts the reversal connection watt-hour meter to implement stealing.In addition, do not possess electric leakage and over-voltage protecting function yet.
In view of above-mentioned, the purpose of this utility model provides a kind of multi-function watt-hour meter, and it can prevent stealing effectively, has electric leakage and overvoltage protection effect.
Technical solution of the present utility model is on two electric current inlet wires in existing watt-hour meter switch and zero sequence current mutual inductor to be set, and between switch and zero sequence current mutual inductor the Access Control circuit, utilize zero sequence current mutual inductor to go the driving switch action through control circuit, cut off incoming power from two detected signals of electric current inlet wire.
Multi-function watt-hour meter of the present utility model, when running into the abnormal work situation, its zero sequence current mutual inductor will detect two unbalanced current signals of electric current inlet wire, and is cut off the electricity supply by the control circuit driving switch by this signal.
Below in conjunction with accompanying drawing the utility model is further described.
Fig. 1 is the formation synoptic diagram of multi-function watt-hour meter;
Fig. 2 is a kind of physical circuit example of the control circuit in the multi-function watt-hour meter.
With reference to Fig. 1, multi-function watt-hour meter of the present utility model is on two electric current inlet wires 1,2 in existing watt-hour meter switch 3 and zero sequence current mutual inductor 4 to be set, and at switch 3 and 4 access control circuits 5 of zero sequence current mutual inductor.The iron core of zero sequence current mutual inductor entangles two electric current inlet wires 1,2, the secondary connection control circuit, and switch can adopt relay or electronic switch.The concrete control circuit that Fig. 2 provides has amplifier A, controllable silicon S and rectifier bridge Q, and here, amplifier adopts M54123,101,102 termination zero sequence current mutual inductor secondary among the figure, and the output termination silicon controlled control utmost point of M54123, the 8th pin is through resistance R
4Connect the silicon controlled anode, the wherein a pair of end points of rectifier bridge links to each other with negative electrode with the silicon controlled anode respectively, and another links to each other with switch to exit point 103,104, as adopting relay, then links to each other with the coil of relay.Like this; at the current coil that adopts the short circuit watt-hour meter (is 11 of connection layout 1; 12 ends); or the reversal connection watt-hour meter (promptly exchanges 11; 12 ends); or establish earth terminal in addition and implement stealing; or when electric leakage takes place; the electric current that all can cause two electric current inlet wires that pass the former limit of zero sequence current mutual inductor is unequal; and induce corresponding current signal at the secondary of zero sequence current mutual inductor; this signal input control circuit; after M54123 amplifies; trigger controllable silicon S conducting; make rectifier bridge Q become short-circuit condition; so control circuit output terminal 103; 104 short circuits; form path with the switching line circle, flow through the current drives switch motion of switch coil, cut off incoming power; can stop electricity filching behavior effectively and play the earth leakage protection effect; only remain to be got rid of abnormal conditions, switch is resetted, could recover normal power supply.As if a voltage dependent resistor (VDR) 6 leap zero sequence current mutual inductors are linked to each other with two electric current inlet wires respectively (seeing shown in Figure 1); also can make watt-hour meter have over-voltage protecting function; because when circuit produces overvoltage; voltage dependent resistor (VDR) is breakdown; the electric current that can cause two electric current inlet wires that pass zero sequence current mutual inductor equally is inequality; then, also can realize utilizing switch cut-out incoming power and have over-voltage protection function with aforementioned principle of work.
Multi-function watt-hour meter of the present utility model can prevent various electricity filching behaviors effectively, also has earth leakage protection and overvoltage protection effect.
Claims (3)
1. multi-function watt-hour meter, it is characterized in that on the two electric current inlet wires [1], [2] in existing watt-hour meter switch [3] and zero sequence current mutual inductor [4] being set, and between switch [3] and zero sequence current mutual inductor [4], insert control circuit [5], utilize zero sequence current mutual inductor to go the driving switch action, cut off incoming power through control circuit from two detected signals of electric current inlet wire.
2. by the described multi-function watt-hour meter of claim 1, it is characterized in that said control circuit [5] has amplifier [A], controllable silicon [S] and rectifier bridge [Q], the output termination silicon controlled control utmost point of amplifier, the wherein a pair of end points of rectifier bridge links to each other with anode with the silicon controlled anode respectively, and another links to each other with switch to exit point.
3. by the described multi-function watt-hour meter of claim 1, it is characterized in that a voltage dependent resistor (VDR) [6] is crossed over zero sequence current mutual inductor [4] to link to each other with two electric current inlet wires respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00208007 CN2419602Y (en) | 2000-04-04 | 2000-04-04 | Multifunctional kilowatt meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00208007 CN2419602Y (en) | 2000-04-04 | 2000-04-04 | Multifunctional kilowatt meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2419602Y true CN2419602Y (en) | 2001-02-14 |
Family
ID=33575507
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00208007 Expired - Fee Related CN2419602Y (en) | 2000-04-04 | 2000-04-04 | Multifunctional kilowatt meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2419602Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106405181A (en) * | 2016-10-31 | 2017-02-15 | 国网山东省电力公司济南供电公司 | Electric energy meter with anti-electricity stealing monitoring function |
-
2000
- 2000-04-04 CN CN 00208007 patent/CN2419602Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106405181A (en) * | 2016-10-31 | 2017-02-15 | 国网山东省电力公司济南供电公司 | Electric energy meter with anti-electricity stealing monitoring function |
| CN106405181B (en) * | 2016-10-31 | 2018-08-07 | 国网山东省电力公司济南供电公司 | A kind of electric energy meter with anti-electricity-theft monitoring function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |