CN2193555Y

CN2193555Y - Rod-type megger

Info

Publication number: CN2193555Y
Application number: CN 94217737
Authority: CN
Inventors: 陈邦达; 李恒才
Original assignee: Individual
Current assignee: Chen Bangda; Li Hengcai
Priority date: 1994-07-25
Filing date: 1994-07-25
Publication date: 1995-03-29
Anticipated expiration: 2004-07-25

Abstract

The utility model relates to a rod-shaped megger which is safer and more convenient for operators. The utility model is connected by three main parts such as an operating rod, a measuring rod and a telescopic rod, wherein, the operating rod which can be held by human hands is a high-strength insulator, an electronic megger and an electroscope are arranged in the measuring rod, and the conductive telescopic rod can randomly expand so as to contact a tested device or a tested power circuit. Owing to adopting the structure, when the utility model tests the insulation resistance of the device, whether no voltage or not can be identified firstly. Meanwhile, operators do not need contact the outer shells of the tested device and the tested megger in the entire testing process; when the position of the tested device is high or the tested device is the power circuit, the operators do not need climb up or climb a rod for working.

Description

Rod-type megger

The utility model relates to a kind of electrical measuring device that is used for measuring electrical equipment or power circuit insulation resistance, is a kind of safer, megohmmeter more easily that uses.

At present, known megohmmeter, before measurement, the staff will receive its utmost point on the equipment under test with lead, when the equipment under test position during higher or power circuit, the staff also will ascend a height or step on the bar operation, and not only labour intensity is big, but also the wrong danger of bumping charging equipment or falling from the high-altitude.When measuring, the staff will contact the shell of megohmmeter, because shell is lower to the insulation of inner electric loop, also potential the incoming call suddenly when equipment under test injured staff's danger.

The purpose of this utility model provides a kind of safe and convenient megohmmeter.

The purpose of this utility model is achieved in that megohmmeter is manufactured into a kind of bar type, and it is formed by connecting by control lever, sounding rod, three major parts of expansion link.Control lever is the high strength insulator of holding for the staff, and it can be made as required and be applicable to different electric pressures.Whether really the sounding rod internal fixation has the battery of electronics megohmmeter and electroscope and megohmmeter, and the staff can utilize electroscope before the insulation resistance of measuring electrical equipment or power circuit, identify its no-voltage earlier.The outside of sounding rod also has the fallers that can rotate about 90 degree, and the rotatable end of faller links to each other with the earthing pole of megohmmeter, when it attached to sounding rod on the time, another of its other end and megohmmeter extremely links to each other.Conduct electricity faller inside, and its effect is: first. check megohmmeter the two poles of the earth indicating whether accurately when short circuit and open circuit before measuring; Second. is communicated with into about 90 degree and with ground wire with sounding rod during the insulation resistance of measuring equipment, the safe distance that guarantees staff and ground wire is in case unexpected the incoming call.Expansion link is made of some joint hollow stem intussusceptions, and its lower end links to each other with megohmmeter and electroscope, and there is a metal hook upper end, and two ends are communicated with on electric up and down.The hand that it replaces the people links to each other a utmost point of megohmmeter with measured equipment, when the equipment under test position during higher or power circuit, the staff needn't be ascended a height or step on bar.Expansion link can be made different length as requested.The hook of expansion link upper end can also hang on the lead of equipment under test when condition is permitted except that being used to contact the equipment under test.When the equipment under test position is low, also can be without expansion link, and directly contact equipment under test with the top of sounding rod.

Owing to adopted such scheme, make the staff before measurement, can check whether really no-voltage of equipment under test, and in measuring process, directly do not contact the shell of equipment under test and megohmmeter, also contact measurement ground wire not, so safer.During higher or power circuit, the staff then needn't ascend a height or step on bar, has not only reduced the risk factor of staff's operation, has also reduced staff's labour intensity, and is safer in the course of work, more convenient when the equipment under test position.

Below in conjunction with accompanying drawing, the utility model is further specified.

Fig. 1 is the synoptic diagram of profile of the present utility model.

Fig. 2 is an expansion link vertical section structure synoptic diagram.

The axle and bearing 12. lines of indicator 7. measuring switch 8. metal hooks 9. fallers 10. magnet 11. fallers of 1. control lever, 2. sounding rods, 3. expansion links, 4. spacing full skirt 5. electroscopes 6. megohmmeters are taken turns 13. steel wires among the figure

In Fig. 1: control lever (1), sounding rod (2), expansion link (3) fuse becomes a kind of bar type structure.Control lever (1) series high strength insulator can be made on request and be applicable to different electric pressures, when voltage is higher, can adopt composite insulating material and umbrella skirt construction to increase electrical distance.The bottom of control lever (1) is with a full skirt (4), can only be held in the following position of full skirt (4) in order to the hand that limits operating personnel.The outer faller (9) that has an afterbody perk of sounding rod (2), it can do about 90 rotations of spending around the axle and the bearing (11) of its underpart, and when not working, faller (9) is adsorbed on sounding rod (2) upper end by the magnet (10) of its upper end.Sounding rod (2) connects with ferrous material with expansion link (3).Before the work: faller (9) can be checked the indication of megohmmeter when the short circuit of the two poles of the earth when not rotating; After rotating 90 degree, the indication in the time of can checking megohmmeter to open a way at the two poles of the earth.After check megohmmeter and the electrical verification, will measure property-line and receive faller (9) front end, make that measurement ground wire and staff keep certain distance in the measuring process.Sounding rod (2) internal fixation has the terminal block of ordinary electronic megohmmeter, and the indicator of megohmmeter (6) can be indicated insulating resistance value with one of numeral, voice, pointer by different requirements.Measuring switch (7) is in order to the break-make of control megohmmeter battery.Electroscope (5) is in order to indicate measured equipment no-voltage whether really before measurement.

In Fig. 2, expansion link (3) by the hollow rigidity of some joints and toughness preferably lightweight material make, external diameter matches in each joint, so that the flexible of cover poststack freely, expansion link (3) should conduct electricity, its embodiment 1 is the line wheel (12) that a tight spring of the roll coil of strip is arranged in its lower end, links to each other with the metal hook (8) of upper end by a steel wire (13); Its embodiment 2 is not have line wheel (12) and steel wire (13), uses alloy material to make expansion link; Its embodiment 3 is not have line wheel (12) and steel wire (13), and expansion link itself is an insulator, but outer wall has plated one deck conducting film within it.

Claims

1, a kind of bar type megohmmeter is characterized in that: it is made up of insulating bar, sounding rod, three major parts of expansion link, and above-mentioned three parts connect into the megohmmeter of a kind of flexible bar type structure freely.

2, megohmmeter according to claim 1 is characterized in that: its control lever is high-intensity insulator, and can make suitable different electric pressure.

3, megohmmeter according to claim 1 is characterized in that: the electric part of electroscope and megohmmeter all is fixed on the inside of sounding rod; The outside of sounding rod also has a faller.

4, megohmmeter according to claim 1 is characterized in that: its expansion link constitutes also flexible by some joint hollow stem intussusceptions and also can make different length on request freely; There is a metal hook on the top of expansion link.