CN204347224U - Intelligent DC analogue ground tester - Google Patents
Intelligent DC analogue ground tester Download PDFInfo
- Publication number
- CN204347224U CN204347224U CN201520018889.6U CN201520018889U CN204347224U CN 204347224 U CN204347224 U CN 204347224U CN 201520018889 U CN201520018889 U CN 201520018889U CN 204347224 U CN204347224 U CN 204347224U
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- China
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- chip microcomputer
- adjustable resistance
- connects
- protected location
- machine interface
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- Expired - Fee Related
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Abstract
The utility model discloses a kind of intelligent DC analogue ground tester to DC power supply device earthing detection, belong to field of electrical equipment.It comprises man-machine interface display instrument, single-chip microcomputer, watchdog circuit, adjustable resistance, protected location, real-time clock, test connecting line, its feature is: man-machine interface display instrument connects single-chip microcomputer, single-chip microcomputer connects adjustable resistance, adjustable resistance connects protected location, protected location connecting test connecting line; Single-chip microcomputer also connects real-time clock and watchdog circuit respectively.The utility model adjustable resistance scope is wide, when carrying out earthing test to DC power system, and can comprehensive simulated ground connection situation.Possessing protected location, when testing, equipment and personnel being played to the effect of safeguard protection.Possess man-machine interface, display test parameter directly perceived and result, be easy to carry.
Description
Technical field
The utility model relates to a kind of electric power DC simulation earthing test system, particularly relates to a kind of intelligent DC analogue ground tester to DC power supply device earthing detection, belongs to field of electrical equipment.
Background technology
DC power system is mainly used in generating plant in electric system, power station and all kinds of transformer station; for the instrument in circuit-breaker switching on-off and secondary circuit, instrument, relay protection, emergency lighting with breaker device even load can not provide working dc power; its the whether normal safe and reliable operation directly affecting electric system; along with Automation of Electric Systems, computing machine control and the development of Power Electronic Technique and the needs of actual field operation and maintenance, to the requirement also corresponding raising of DC power system security.And because field condition is complicated, direct-flow electricity utilization apparatus is more, and the situation of DC power ground connection happens occasionally.In order to the normal operation of support equipment, need regularly analogue ground test to be carried out to DC power system and ensure that its function is normal.Current analogue ground test is just simple by between the resistance of fixed resistance value access DC power system both positive and negative polarity and the earth, do so not only efficiency low, test imperfect but also there is potential safety hazard.For ease of using, be badly in need of improving current electric power DC simulation earthing test system.
Summary of the invention
The utility model is for current Problems existing, and object is to provide that a kind of efficiency is high, cost is low, power of test is strong, is easy to carry, practical intelligent DC analogue ground tester reliably.
This utility model intelligent DC analogue ground tester comprises man-machine interface display instrument, single-chip microcomputer, watchdog circuit, adjustable resistance, protected location, real-time clock, test connecting line, its feature is: man-machine interface display instrument connects single-chip microcomputer, single-chip microcomputer connects adjustable resistance, adjustable resistance connects protected location, protected location connecting test connecting line; Single-chip microcomputer also connects real-time clock and watchdog circuit respectively.
Man-machine interface display instrument is 240X64 lattice lcd screen, for showing various parameter and definite value setting; Single-chip microcomputer adopts the mega64 of general atmel company, the internal SRAM of the EEPROM of 4K byte, 4K byte; Watchdog circuit has individual sheets internal oscillator, has six kinds of sleep patterns; Adjustable resistance is 0K to 200K wide-range high-accuracy adjustable resistance; Protected location plays a protective role when voltage or electric current exceed safe range; Real-time clock is used for providing temporal information; Test connecting line is used for connecting test instrument and DC power system.
The utility model intelligent DC analogue ground tester, adjustable resistance scope is wide, when carrying out earthing test to DC power system, can comprehensive simulated ground connection situation.Possessing protected location, when testing, equipment and personnel being played to the effect of safeguard protection.Power supply adopts No. 5 common batteries, and tester is easy to carry.Possesses man-machine interface, display test parameter directly perceived and result.Each functional circuit adopts new integrated circuit technique, and energy-conserving and environment-protective improve properties of product, reduce cost, perfect product function.
Accompanying drawing explanation
Fig. 1 is the utility model intelligent DC analogue ground tester structural principle schematic diagram.
Embodiment
Illustrate below in conjunction with accompanying drawing and the utility model is further elaborated.
Intelligent DC analogue ground tester described in the utility model comprises: man-machine interface display instrument 1, single-chip microcomputer 2, watchdog circuit 3, adjustable resistance 4, protected location 5, real-time clock 6, test connecting line 7, its feature is: man-machine interface display instrument 1 connects single-chip microcomputer 2, single-chip microcomputer 2 connects adjustable resistance 4, adjustable resistance 4 connects protected location 5, protected location 5 connecting test connecting line 7; Single-chip microcomputer 2 also connects real-time clock 6 and watchdog circuit 3 respectively.
Man-machine interface 1 is 240X64 lattice lcd screen, for showing various operational factor and definite value setting; After switching on power; operational factor and parameters is understood by man-machine interface 1; play monitoring in watchdog circuit 3, real-time clock 6 course of work and provide temporal information effect; equipment functional reliability can be made to improve, and single-chip microcomputer 2 instruction control adjustable resistance 4 accesses DC power system through protected location 5 and test connecting line 7 and carries out earthing test.
Claims (2)
1. intelligent DC analogue ground tester, comprise man-machine interface display instrument, single-chip microcomputer, watchdog circuit, adjustable resistance, protected location, real-time clock, test connecting line, its feature is: man-machine interface display instrument connects single-chip microcomputer, single-chip microcomputer connects adjustable resistance, adjustable resistance connects protected location, protected location connecting test connecting line; Single-chip microcomputer also connects real-time clock and watchdog circuit respectively.
2. intelligent DC analogue ground tester as claimed in claim 1, its feature is: man-machine interface display instrument is 240X64 lattice lcd screen; Single-chip microcomputer adopts the EEPROM of mega64,4K byte, the internal SRAM of 4K byte; Watchdog circuit has individual sheets internal oscillator; Adjustable resistance is 0K to 200K adjustable resistance.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201520018889.6U CN204347224U (en) | 2015-01-12 | 2015-01-12 | Intelligent DC analogue ground tester |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201520018889.6U CN204347224U (en) | 2015-01-12 | 2015-01-12 | Intelligent DC analogue ground tester |
Publications (1)
Publication Number | Publication Date |
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CN204347224U true CN204347224U (en) | 2015-05-20 |
Family
ID=53230485
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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CN201520018889.6U Expired - Fee Related CN204347224U (en) | 2015-01-12 | 2015-01-12 | Intelligent DC analogue ground tester |
Country Status (1)
Country | Link |
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CN (1) | CN204347224U (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107589383A (en) * | 2016-07-07 | 2018-01-16 | 北京普源精电科技有限公司 | A kind of method for displaying parameters of measuring apparatus |
-
2015
- 2015-01-12 CN CN201520018889.6U patent/CN204347224U/en not_active Expired - Fee Related
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107589383A (en) * | 2016-07-07 | 2018-01-16 | 北京普源精电科技有限公司 | A kind of method for displaying parameters of measuring apparatus |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
CF01 | Termination of patent right due to non-payment of annual fee | ||
CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150520 Termination date: 20170112 |