CN203705580U - Test apparatus grounding detection alarm device - Google Patents
Test apparatus grounding detection alarm device Download PDFInfo
- Publication number
- CN203705580U CN203705580U CN201420054146.XU CN201420054146U CN203705580U CN 203705580 U CN203705580 U CN 203705580U CN 201420054146 U CN201420054146 U CN 201420054146U CN 203705580 U CN203705580 U CN 203705580U
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- detection module
- ground connection
- circuit
- test apparatus
- alarm device
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Abstract
The utility model discloses a test apparatus grounding detection alarm device. The alarm device comprises a box body. A control panel is arranged in the box body. A power supply access port and a power supply switch which are electrically connected are arranged on the control panel. A grounding detection module electrically connected with the power supply switch, a grounding introducing conductor connected with the input end of the grounding detection module and an alarm device connected with the output end of the grounding detection module are arranged on the control panel. The grounding detection module is a grounding resistance detection module and comprises an alternating current coupling amplification circuit and a multivibrator circuit. The grounding introducing conductor is electrically connected with the alternating current coupling amplification circuit of the grounding detection module. The alarm device is electrically connected with the multivibrator circuit of the grounding detection module. The circuit structure of the detection module is simple, and the test apparatus grounding detection alarm device has high sensitivity, high accuracy and a compact overall structure, is easy to carry, and is suitable for rapid detection of various electrical devices and test apparattuses in electric power construction and installation.
Description
Technical field
The utility model belongs to electrical equipment grounding pick-up unit technical field, especially relates to a kind of device that the ground connection situation of electrical test instrument is detected and provided warning.
Background technology
The ground protection that electrical equipment and test apparatus are good is the basic demand of Electrical Safety.When equipment, test apparatus do not have protective ground, or when imperfect earth, once a certain SI semi-insulation of equipment, instrument damages, shell will be charged, and operating personnel are easy to be subject to Danger Electric shock risk.According to electricity consumption standard-required, stake resistance generally should be below 4 ohm, if though instrument and equipment has ground connection, resistance is excessive, also can affect use safety.Meanwhile, the electrostatic charge that good ground connection can be instrument and equipment provides the path of releasing over the ground, avoids the generation of electric spark or electric arc, is conducive to equipment and uses safety.In the installation test and application of power equipment, due to affected by environment and service condition restriction, also there is no a kind of instrument that can carry out to the Grounding of equipment and instrument convenient and swift detection, usually miss ground, imperfect earth because carelessness causes instrument and equipment, the person and device security are constituted a threat to.
Summary of the invention
The technical problems to be solved in the utility model is to provide a kind of simple in structure, can carry out to the Grounding of electrical equipment and test apparatus the device of fast detecting.
For solving the problems of the technologies described above, the utility model comprises casing, in described casing, be provided with control panel, control panel is provided with power access end mouth and the power switch of electrical connection, and its design feature is that the ground connection that is also provided with the ground connection detection module that is electrically connected with power switch on described control panel, is connected on ground connection detection module input end is introduced conductor and is connected to the warning device on ground connection detection module output terminal; Described ground connection detection module is stake resistance detection module, and it comprises AC coupling amplifying circuit and multi-resonant oscillating circuit; Described ground connection is introduced conductor and is electrically connected with the AC coupling amplifying circuit of ground connection detection module, and described warning device is electrically connected with the multi-resonant oscillating circuit of ground connection detection module.
Preferably described AC coupling amplifying circuit comprises regulating circuit, amplifying circuit and 4N25 photoelectrical coupler, the input end of regulating circuit is electrically connected with power switch, and the output terminal of regulating circuit and ground connection are introduced conductor and is connected to respectively on two input ends of amplifying circuit; Two output terminals of amplifying circuit are connected to respectively anode and the negative electrode of 4N25 photoelectrical coupler; Multi-resonant oscillating circuit comprises LM555 time base circuit and peripheral circuitry; The collector of 4N25 photoelectrical coupler is connected with the reset terminal of LM555 time base circuit; Warning device is connected with the output terminal of LM555 time base circuit.
Described warning device comprises light warning device harmony warning device.
Between the output terminal of described warning device and LM555 time base circuit, be connected to alarm release device.
Described control panel is provided with earth leakage protective device and output port of power source, and described earth leakage protective device is connected on the rear end of power switch, and output port of power source is electrically connected with earth leakage protective device.
Described ground connection is introduced conductor and is provided with connecting screw hole.
The beneficial effects of the utility model are: power access end mouth, ground connection detection module, warning device and ground connection that the control panel in the utility model casing is provided with electrical connection import body, and ground connection detection module is stake resistance detection module.When use, test apparatus imports body with ground connection and is connected, and can test test apparatus Grounding after power access end mouth is connected with power supply.If warning device will send alerting signal, illustrate that test apparatus does not have ground connection or stake resistance excessive (being generally 4 ohm).If instead warning device does not send alerting signal, illustrate that test apparatus ground connection is good, its stake resistance is in normal range.Stake resistance detection module comprises AC coupling amplifying circuit and multi-resonant oscillating circuit, ground connection is introduced conductor and is electrically connected with AC coupling amplifying circuit, and warning device is electrically connected with multi-resonant oscillating circuit, and the circuit structure of detection module is simple, the susceptibility detecting is strong, and accuracy is high.Each device concentrated setting is in casing, and compact conformation, is easy to carry, and is suitable for the field quick detection to various electrical equipments and test apparatus in power construction and installation.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further described:
Fig. 1 is the utility model overall schematic;
Fig. 2 is that the each component circuitry of the utility model connects block diagram;
Fig. 3 is the utility model ground connection detection module circuit diagram.
Embodiment
See figures.1.and.2, this test apparatus earthing detection alarm device comprises casing 1, and casing 1 is provided with removable box cover 11, is provided with control panel 2 in casing 1.Control panel 2 is provided with power access end mouth 3, power switch 4, earth leakage protective device 5, output port of power source 6, warning device 7, the ground connection of electrical connection and introduces conductor 9 and ground connection detection module 10.Power switch 4 is for controlling the break-make of detection alarm device electric current.Earth leakage protective device 5 is located at power switch 4 rear ends, is provided with some output port of power source 6 in earth leakage protective device 5 rear ends, and output port of power source 6 can be used as the electrical interface of using of other external equipment.Ground connection detection module 10 is stake resistance detection module, and it comprises AC coupling amplifying circuit and multi-resonant oscillating circuit; This ground connection detection module 10 is electrically connected with power switch 4, and ground connection is introduced conductor 9 and is electrically connected with ground connection detection module 10, and warning device 7 is electrically connected with the multi-resonant oscillating circuit of ground connection detection module 10.Warning device 7 comprises light warning device 71 harmony warning devices 72.The front end of warning device 7 is connected to alarm release device 8, when test, if warning device 7 sends warning, but through site inspection, really ground connection of test apparatus, warning causes because stake resistance exceedes alarming value, can utilize alarm release device 8 Temporarily Closeds to report to the police, and proceed experiment work.It is copper matrix that ground connection is introduced conductor 9, which is provided with multiple connecting screw holes 91, to many instruments are tested one by one.
With reference to Fig. 3, stake resistance detection module is made up of AC coupling amplifying circuit and multi-resonant oscillating circuit.AC coupling amplifying circuit comprises regulating circuit 113, amplifying circuit 112 and 4N25 photoelectrical coupler 111.Wherein, the input end of regulating circuit 113 is electrically connected with power switch, and the output terminal of regulating circuit 113 and ground connection are introduced conductor 9 and is connected to respectively on two input ends of amplifying circuit 112; Two output terminals of amplifying circuit 112 are connected to respectively anode and the negative electrode of 4N25 photoelectrical coupler 111.Multi-resonant oscillating circuit comprises LM555 time base circuit 121 and peripheral circuitry 122; The collector of 4N25 photoelectrical coupler 111 is connected with the reset terminal of LM555 time base circuit 121.Ground connection is introduced conductor 9 and is connected with amplifying circuit 112, and warning device 7 is connected with the output terminal of LM555 time base circuit 121.Alarm release device 8 is keyswitch, and it is located between warning device 7 and the output terminal of LM555 time base circuit.
When work, regulating circuit 113 two ends connect 220 volts of alternating currents.Before test, first carry out self check: ground connection is introduced to conductor 9 ground connection and disconnected, check whether warning device 7 reports to the police; Under alarm condition, the decontrol 8 that pushes for emergency, checks alarm release device 8 working conditions.In the time that this device self is working properly, can detect test, experimental apparatus and ground connection are introduced to conductor 9 to be connected, if experimental apparatus do not have ground connection or stake resistance excessive, the collector of 4N25 photoelectrical coupler 111 will send electric signal to the reset terminal of LM555 time base circuit 121, LM555 time base circuit 121 is received after signal through output terminal output electrical signals, and warning device 7 is sounded and light warning.
Claims (6)
1. a test apparatus earthing detection alarm device, comprise casing (1), in described casing (1), be provided with control panel (2), control panel (2) is provided with power access end mouth (3) and the power switch (4) of electrical connection, it is characterized in that being also provided with on described control panel (2) the ground connection detection module (10) being electrically connected with power switch (4), the ground connection being connected on ground connection detection module (10) input end is introduced conductor (9) and is connected to the warning device (7) on ground connection detection module (10) output terminal; Described ground connection detection module (10) is stake resistance detection module, and it comprises AC coupling amplifying circuit and multi-resonant oscillating circuit; Described ground connection is introduced conductor (9) and is electrically connected with the AC coupling amplifying circuit of ground connection detection module (10), and described warning device (7) is electrically connected with the multi-resonant oscillating circuit of ground connection detection module (10).
2. according to test apparatus earthing detection alarm device claimed in claim 1, it is characterized in that described AC coupling amplifying circuit comprises regulating circuit (113), amplifying circuit (112) and 4N25 photoelectrical coupler (111); The input end of regulating circuit (113) is electrically connected with power switch, and the output terminal of regulating circuit (113) and ground connection are introduced conductor (9) and is connected to respectively on two input ends of amplifying circuit (112); Two output terminals of amplifying circuit (112) are connected to respectively anode and the negative electrode of 4N25 photoelectrical coupler (111); Multi-resonant oscillating circuit comprises LM555 time base circuit (121) and peripheral circuitry (122); The collector of 4N25 photoelectrical coupler (111) is connected with the reset terminal of LM555 time base circuit (121); Warning device (7) is connected with the output terminal of LM555 time base circuit (121).
3. according to test apparatus earthing detection alarm device claimed in claim 2, it is characterized in that described warning device (7) comprises light warning device (71) harmony warning device (72).
4. according to the test apparatus earthing detection alarm device described in claim 2 or 3, it is characterized in that being connected to alarm release device (8) between described warning device (7) and the output terminal of LM555 time base circuit.
5. according to test apparatus earthing detection alarm device claimed in claim 1; it is characterized in that control panel (2) is provided with earth leakage protective device (5) and output port of power source (6); described earth leakage protective device (5) is connected on the rear end of power switch (4), and output port of power source (6) is electrically connected with earth leakage protective device (5).
6. according to test apparatus earthing detection alarm device claimed in claim 1, it is characterized in that described ground connection introducing conductor (9) is provided with connecting screw hole (91).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420054146.XU CN203705580U (en) | 2014-01-28 | 2014-01-28 | Test apparatus grounding detection alarm device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420054146.XU CN203705580U (en) | 2014-01-28 | 2014-01-28 | Test apparatus grounding detection alarm device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203705580U true CN203705580U (en) | 2014-07-09 |
Family
ID=51056000
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420054146.XU Withdrawn - After Issue CN203705580U (en) | 2014-01-28 | 2014-01-28 | Test apparatus grounding detection alarm device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203705580U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103777112A (en) * | 2014-01-28 | 2014-05-07 | 国网山东昌乐县供电公司 | Test instrument grounding detection warning device |
-
2014
- 2014-01-28 CN CN201420054146.XU patent/CN203705580U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103777112A (en) * | 2014-01-28 | 2014-05-07 | 国网山东昌乐县供电公司 | Test instrument grounding detection warning device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140709 Effective date of abandoning: 20161019 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |