CN2099982U - Multifunctional power supply line detector - Google Patents
Multifunctional power supply line detector Download PDFInfo
- Publication number
- CN2099982U CN2099982U CN 91220184 CN91220184U CN2099982U CN 2099982 U CN2099982 U CN 2099982U CN 91220184 CN91220184 CN 91220184 CN 91220184 U CN91220184 U CN 91220184U CN 2099982 U CN2099982 U CN 2099982U
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- detection
- supply line
- electric leakage
- detector
- common
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- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The utility model discloses a multifunctional power supply line detector. On the basis of the prior art comprising an electric leakage signal detecting device, an amplification circuit and a display device, the electric leakage signal detecting device adopts a pincers-shaped current transformer; the electric leakage signal detecting device can also be used for detecting common current and sends the detected common current to a gear division converting device; a display device generates corresponding display; a transfer switch provides the selecting conversion between electric leakage detection and common detection; the amplification circuit adopts an integrated amplifier and is additionally provided with a detecting inserting opening for voltage detection. The utility model has the advantages of simple circuit, small volume, portability and convenient use.
Description
The utility model relates to the pick-up unit of measuring the electrical property in the electric variable technical field, or perhaps the sniffer of electric fault; Specifically, be a kind of to electric line carry out short circuit, open circuit, the proving installation of leakage or incorrect connection, the device of location of fault in a kind of exploration cable, transmission line or the network in other words conj.or perhaps.
At present, generally has used the rural area in the whole nation 80%, and also used earth leakage protector in a lot of places, owing to reasons such as aging circuits, often cause the protector tripping operation, have a power failure, also there is other leaky in addition in the supply line, in order to find out the trouble spot, rural area electrician's workload strengthens day by day, the considerable time is used for the circuit inspection, also will take out stitches sometimes and check separately, not only wastes man-hour, even, cause being discontented with of users also because of checking that failsafe point influences normal power supply for the moment.
A kind of " leakage detector " disclosed in the Chinese patent application case 90210518.3.It is made up of amplifier, display device, electric leakage signal detection device, limiter etc.The electric leakage signal detection device is made of two iron cores, three coils.It can be used for measuring the electric leakage in the 220V supply line, to search the trouble spot.Its circuit is complicated, function singleness, and used element is more, and poor reliability, and electric leakage signal detection device complex structure are unfavorable for making and using.
The purpose of this utility model provides a kind of simple in structure, multi-functional supply line detector that volume is little, easy to carry and use that is used to detect supply line's situation.
Technical solution of the present utility model is: a kind of multi-functional supply line detector, be at amplifying circuit that the existing signal that comprises the electric leakage signal pick-up unit, the electric leakage signal pick-up unit is sent into amplifies, and show on the leakage detector basis of display device of amplifying circuit output signal, the electric leakage signal pick-up unit is adopted split core type current transformer; The electric leakage signal pick-up unit is also as the common current pick-up unit, it delivers to a stepping conversion equipment of being made up of selector switch and step-down, shunt resistance with the common current signal that detects, the stepping conversion equipment also links to each other with aforementioned display, produces corresponding demonstration; A switch provides the conversion of the selection between detection of electrical leakage and common detection.
Split core type current transformer in the utility model can adopt tong ammeter jaw structure.
Provide in the utility model the selection conversion between detection of electrical leakage and common detection switch can with the on/off switch gearing of amplifying circuit.
Amplifying circuit in the utility model can be made up of integrated amplifier and accessory circuit.
In the circuit of the present utility model, have two detection sockets to be connected with the stepping conversion equipment, the detection of common voltage can be undertaken by detecting socket.
The utility model has the advantages that: circuit structure is simple, volume is little, carry with easy to use, can in time detect the various situations in the supply line, especially the electric leakage in 220V and the 380V supply line need not cut off supply line and stop power supply, and finds out the trouble spot in the supply line apace, guarantee the normal power supply of circuit, be particularly suitable for vast rural area and use.Load that can also detection line and supply voltage etc. are in time grasped the working condition of circuit, help eliminating potential faults, alleviate electrician, especially rural area electrician's labour intensity, increase work efficiency.
The utility model is described in further detail below in conjunction with drawings and Examples:
Accompanying drawing is the circuit diagram of a kind of multi-functional supply line of the present utility model detector.
Accompanying drawing has been described an embodiment of the present utility model.It has the split core type current transformer jaw CT that adopts on the similar tong ammeter; A double-break switch K1 is for the selection conversion that detects leakage current and General Parameters.When need detect leakage current, K switch 1-1 is allocated to " mA " position, K switch 1-2 is with the power connection of integrated circuit (IC) at this moment, the detected leakage current signal of current transformer CT is delivered to by integrated circuit (IC) (DA2822M) and capacitor C 1 through shunt resistance R1, C2, C3, C4, resistance R 2, R3, the amplifying circuit that subsidiary components such as RL are formed amplifies, and " mA " contact on coaxial wave band switch S D is delivered to by direct current gauge outfit M and resistance R 6, R7, diode D1, the display device that the bridge rectifier temperature-compensation circuit that D2 constitutes is formed demonstrates the electric leakage reading, according to electric leakage reading situation, can find out the trouble spot of electric leakage easily.
When double-break switch K1-1 was allocated to " A " position, correspondingly K1-2 promptly disconnected the power supply of integrated circuit (IC), with the serviceable life of economize on electricity and prolongation integrated circuit (IC).At this moment, current transformer CT with by coaxial wave band switch S D, reach measuring resistance R4, R5, R6, R7, the selection conversion equipment that fine setting measuring resistance W1, W2, W3 etc. constitute links to each other, select conversion equipment and aforesaid by direct current gauge outfit M, resistance R 8, R9, the display device that diode D1, D2 form links to each other, and its principle and general tong ammeter or multimeter roughly the same can be used for the detection of common voltage, electric current.Similar structures in the also similar multimeter of effect of two detection socket C, D is used for voltage detecting.Select conversion equipment can provide 5A, 50A, 250A, 300V, 600V etc. to select class, certainly, also can be designed to other suitable selection shelves.
Claims (7)
1, a kind of multi-functional supply line detector, the amplifying circuit that the signal that comprises the electric leakage signal pick-up unit, the electric leakage signal pick-up unit is sent into amplifies, and show the display device of amplifying circuit output signal, it is characterized in that: the electric leakage signal pick-up unit adopts split core type current transformer; The electric leakage signal pick-up unit is also as the common current pick-up unit, it delivers to a stepping conversion equipment of being made up of selector switch and step-down, shunt resistance with the common current signal that detects, the stepping conversion equipment also links to each other with aforementioned display, produces corresponding demonstration; A switch provides the conversion of the selection between detection of electrical leakage and common detection.
2, multi-functional supply line according to claim 1 detector is characterized in that: split core type current transformer adopts tong ammeter jaw formula structure.
3, multi-functional supply line according to claim 1 and 2 detector is characterized in that: the switch of the selection conversion between detection of electrical leakage and common detection and the on/off switch gearing of amplifying circuit are provided.
4, multi-functional supply line according to claim 1 and 2 detector, it is characterized in that: amplifying circuit is made up of integrated amplifier and accessory circuit.
5, multi-functional supply line according to claim 3 detector, it is characterized in that: amplifying circuit is made up of integrated amplifier and accessory circuit.
6, multi-functional supply line according to claim 1 and 2 detector is characterized in that: have two to detect sockets and be connected with the stepping conversion equipment, the detection of common voltage can be undertaken by the detection socket.
7, multi-functional supply line according to claim 5 detector is characterized in that: have two to detect sockets and be connected with the stepping conversion equipment, the detection of common voltage can be undertaken by the detection socket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91220184 CN2099982U (en) | 1991-08-10 | 1991-08-10 | Multifunctional power supply line detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91220184 CN2099982U (en) | 1991-08-10 | 1991-08-10 | Multifunctional power supply line detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2099982U true CN2099982U (en) | 1992-03-25 |
Family
ID=4927307
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91220184 Withdrawn CN2099982U (en) | 1991-08-10 | 1991-08-10 | Multifunctional power supply line detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2099982U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103869213A (en) * | 2014-03-31 | 2014-06-18 | 常州机电职业技术学院 | Power line electricity on-off testing device |
-
1991
- 1991-08-10 CN CN 91220184 patent/CN2099982U/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103869213A (en) * | 2014-03-31 | 2014-06-18 | 常州机电职业技术学院 | Power line electricity on-off testing device |
| CN103869213B (en) * | 2014-03-31 | 2016-05-04 | 常州机电职业技术学院 | The electric on off test device of a kind of power line |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| 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 |