CN201903577U - Low-voltage AC/DC test pencil - Google Patents
Low-voltage AC/DC test pencil Download PDFInfo
- Publication number
- CN201903577U CN201903577U CN2010206693082U CN201020669308U CN201903577U CN 201903577 U CN201903577 U CN 201903577U CN 2010206693082 U CN2010206693082 U CN 2010206693082U CN 201020669308 U CN201020669308 U CN 201020669308U CN 201903577 U CN201903577 U CN 201903577U
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- test pencil
- display lamp
- circuit
- diode
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Abstract
The utility model discloses a low-voltage AC/DC test pencil. The test pencil comprises a hollow container body of the test pencil, and is characterized in that a metal measuring head is arranged at the front end of the container body of the test pencil, the rear end of the container body of the test pencil is provided with a grounding metal electrode, a measurement circuit is arranged in the container body of the test pencil, the front end of the measurement circuit is connected with the metal measuring head through a safety resistor, two circuits connected in parallel are arranged behind the safety resistor, wherein a first display lamp and a diode arranged in the forward direction are connected onto one circuit, and the first display lamp is connected in series with the diode arranged in the forward direction, a second display lamp and a diode arranged in the reversed direction are connected onto the other circuit, and the second display lamp and the diode arranged in the reversed direction are connected in series, and the two diodes are connected with the grounding metal electrode to form a loop. The low-voltage AC/DC test pencil provided by the utility model can simultaneously measure AC and DC, and can accurately display an anode and a cathode of the DC, thereby facilitate use of an operator in an electrical system during operation; and the low-voltage AC/DC test pencil has a simpler structure and is convenient to carry.
Description
Technical field
Whether charged the utility model relate to a kind of low-voltage circuit test pencil of testing, especially can test low-voltage circuit whether charged, can also detect alternating current or galvanic low pressure alternating current-direct current test pencil.
Background technology
Whether charged test pencil (test pencil) be the indispensable test circuit of electric system worker (as power worker, electric power overhaul personnel, power equipment installation personnel etc.) instrument, at first whether test circuit has electricity, safety whether when the electric system worker operates, usually all will be under the safety case and could operate definite, all test pencils (test pencil) have important effect to ensureing electric system worker safe operation.In the prior art, the test pencil that a variety of structures are arranged, major part all are the test pencils of measuring 100-500V low tension, and can only measure circuit with alternating current, seldom interchange, galvanic test pencil can be measured simultaneously, nor galvanic both positive and negative polarity can be accurately demonstrated.Simultaneously, the test pencil of prior art (test pencil), its structure is all relatively complicated, and price is higher, especially can accurately demonstrate the test pencil of galvanic both positive and negative polarity, and price is all high, can not satisfy electric system worker's needs.
Summary of the invention
The utility model can not be measured interchange, direct current simultaneously at what the test pencil of prior art existed, can not accurately demonstrate galvanic both positive and negative polarity and structure than complexity and the more high above-mentioned deficiency of price, a kind of low pressure alternating current-direct current test pencil that can measure interchange, direct current both positive and negative polarity simultaneously is provided.
The technical solution of the utility model is: low pressure alternating current-direct current test pencil comprises the electroprobe cylindrical shell of hollow; It is characterized in that: the front end of described electroprobe cylindrical shell is provided with the metal gauge head, and there is the grounded metal level rear end; In the electroprobe cylindrical shell, be provided with metering circuit, the front end of described metering circuit is connected with the metal gauge head by safe resistance, behind safety resistance, be parallel with two circuit, be connected with the diode that first display lamp and forward are provided with on circuit, the diode series connection that first display lamp and forward forward are provided with; The diode that is connected with second display lamp on another circuit and oppositely is provided with, second display lamp and the diode series connection that oppositely is provided with; Two diodes are connected with the grounded metal level again, form the loop.
Further feature is: first display lamp, the upper and lower branch of second display lamp are arranged.
The utility model low pressure alternating current-direct current test pencil with respect to prior art, has following characteristics:
1, can the time measure to exchange, direct current, can accurately demonstrate galvanic both positive and negative polarity, make things convenient for electric power system
The system worker uses when operation.
2, relatively simple for structure, easy to carry.
3, cheap, be lower than the like product that uses on the present market, can satisfy electric system worker's needs.
Description of drawings
Fig. 1 is the utility model test pencil structural representation;
Fig. 2 is testing circuit figure of the present utility model.
Embodiment
In Fig. 1,2, low pressure alternating current-direct current test pencil of the present utility model, the electroprobe cylindrical shell 1 that comprises hollow, the front end of described electroprobe cylindrical shell 1 is provided with metal gauge head 2, and there is grounded metal level 3 rear end, by the metal gauge head 2 and the circuit communication of front end, as insert in the socket and be connected with the reed of socket, the grounded metal level 3 of rear end can be connected with user's hand, and hand, user by the user are communicated with the earth, forms the loop.
In electroprobe cylindrical shell 1, be provided with metering circuit, the front end of described metering circuit is connected with metal gauge head 2 by safe resistance 4, behind safety resistance 4, be parallel with two circuit, be connected with diode 6, the first display lamps 5 of first display lamp 5 and forward setting and diode 6 series connection of forward forward setting on the circuit; 6, two diodes 6 of diode that are connected with second display lamp 7 on another circuit and oppositely are provided with are connected with grounded metal level 3 again, form the loop.Resistance 4 can adopt the divider resistance in the existing test pencil, plays the safety effect of step-down shunting; First display lamp 5, second display lamp 7 can be selected small-sized neon bulb for use, and diode 6 is diodes of prior art, and just the order of connection of two diodes is opposite.
When specifically being provided with, with two display lamps, promptly first display lamp 5, second display lamp, 7 upper and lower branches are arranged, and are convenient to distinguish direct current "+", "-" to electricity, can accurately show galvanic both positive and negative polarity.
The course of work of the utility model test pencil:
When 1, measuring alternating current, by metal gauge head 2 and circuit communication, electric current is behind safety resistance 4, because the diode pair alternating current does not have blocking effect, electric current can pass through two parallel circuits behind safety resistance 4, the circuit diode 6 that first display lamp 5 and forward are provided with of flowing through respectively, and second display lamp 7 and the diode 6 that oppositely is provided with, form loops through grounded metal level 3 then, first display lamp 5, second display lamp 7 are all bright; When measuring, if two display lamps can both be luminous, what then show measurement is alternating current.
2, measure direct current "+" when electricity, because the diode pair direct current has blocking effect, the oppositely diode 6 not conductings that are provided with, electric current only passes through from the diode 6 of first display lamp 5 and forward setting, form the loop through grounded metal level 3, have only first display lamp 5 luminous; When measuring, if having only first display lamp 5 luminous, what then show measurement is that "+" is to direct current.
3, measure direct current "-" when electricity, because the diode pair direct current has blocking effect, the diode 6 not conductings that forward is provided with, electric current only passes through from second display lamp 7 and the reverse diode 6 that is provided with, form the loop through grounded metal level 3, have only second display lamp 7 luminous; When measuring, if having only second display lamp 7 luminous, what then show measurement is that "-" is to direct current.
Claims (2)
1. low pressure alternating current-direct current test pencil comprises the electroprobe cylindrical shell (1) of hollow; It is characterized in that: the front end of described electroprobe cylindrical shell (1) is provided with metal gauge head (2), and there is grounded metal level (3) rear end; In electroprobe cylindrical shell (1), be provided with metering circuit, the front end of described metering circuit is connected with metal gauge head (2) by safe resistance (4), behind safety resistance (4), be parallel with two circuit, be connected with the diode (6) that first display lamp (5) and forward are provided with on circuit, the diode (6) that first display lamp (5) and forward forward are provided with is connected; The diode (6) that is connected with second display lamp (7) on another circuit and oppositely is provided with, second display lamp (7) and diode (6) series connection that oppositely is provided with; Two diodes (6) are connected with grounded metal level (3) again, form the loop.
2. according to the described low pressure alternating current-direct current of claim 1 test pencil, it is characterized in that: first display lamp (5), the upper and lower branch of second display lamp (7) are arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206693082U CN201903577U (en) | 2010-12-20 | 2010-12-20 | Low-voltage AC/DC test pencil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206693082U CN201903577U (en) | 2010-12-20 | 2010-12-20 | Low-voltage AC/DC test pencil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201903577U true CN201903577U (en) | 2011-07-20 |
Family
ID=44274171
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206693082U Expired - Fee Related CN201903577U (en) | 2010-12-20 | 2010-12-20 | Low-voltage AC/DC test pencil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201903577U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108333417A (en) * | 2018-03-29 | 2018-07-27 | 国家电网公司 | 500kV high voltage ac/dc electroscopes |
-
2010
- 2010-12-20 CN CN2010206693082U patent/CN201903577U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108333417A (en) * | 2018-03-29 | 2018-07-27 | 国家电网公司 | 500kV high voltage ac/dc electroscopes |
| CN108333417B (en) * | 2018-03-29 | 2019-12-27 | 国家电网公司 | 500kV high-voltage AC/DC electroscope |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110720 Termination date: 20131220 |