CN104297550A - Rod type clip-on current measuring instrument - Google Patents

Abstract

The invention relates to a rod-type clamp-type current measuring instrument used for on-site operation of electric power system winter load test professionals, including a probe, an insulating rod, and an electronic current meter. It is characterized in that the probe is a rubber material. A "U"-shaped magnet probe with an insulating sheath, and the electronic current meter is connected to the rod through an insulated wire except for the independent insulating rod. The present invention is used for load testing operations in winter, because the electronic current meter is independent from the insulating rod, and it is relatively flexible to use, which avoids the display screen of the electronic current meter facing down or the meter and the measuring personnel in some measurement situations in the past. The occurrence of inconvenient reading phenomenon caused by too long distance. At the same time, the rod-type clamp current measuring instrument, because the main material of the outer insulation of the probe is rubber, will not be damaged in an environment with extremely low temperature, which improves the reliability of safe production.

Description

Rod Clamp Current Meter

technical field

The invention relates to a measuring tool, in particular to a rod-type clamp-type current measuring instrument used for on-site operation of electric power system winter load testing professionals.

Background technique

The load test is carried out every year during the peak power consumption in winter. The main tool for the test is the rod-type clamp current measuring instrument, which is mainly divided into 3 parts, the probe, the insulating rod, and the electronic current meter. When measuring, it is only necessary to clamp the wire to be tested with the probe and read it by the electronic current meter. It is not necessary for the surveyor to climb the pole for high-altitude measurement. However, with the changes of the times and the increase in the number of poles and power consumption, this clamp-on current measuring instrument has been difficult to meet the requirements of today's large-scale load testing. The probe of the currently used clamp current measuring instrument is a "U"-shaped magnet wrapped in plastic. During the load test in winter, due to the low temperature, the plastic will become hard and brittle when it is cold, and it is difficult to avoid the probe during measurement. It needs to be in contact with the wire, which often causes the plastic sheath of the probe to be damaged and the magnet is exposed outside, which is prone to electric shock accidents; at the same time, because the electronic current meter is fixed at the tail of the measuring insulation rod and cannot be moved, the position of the equipment under test when the staff measures the load Higher, the position where the staff stands is far away from the equipment under test. The staff often have to straighten and adjust the insulating rod so that the probe clamps the wire. Since the electronic current meter is fixed at the end of the insulating rod and cannot be moved, this leads to electronic current With the straightening of the insulating rod, the meter is far away from the measuring personnel, so that the measuring workers cannot directly observe the display screen on the electronic current meter, which causes inconvenience in reading and recording, and is not user-friendly in use, which in turn affects the measurement efficiency. There is a need for a novel, safe and reliable rod-type clamp current measuring instrument that is convenient for reading values to solve the above problems.

Contents of the invention

The present invention improves the problems existing in the above-mentioned prior art, and transforms the original ordinary rod-type clamp current measuring instrument (hereinafter referred to as "ordinary type") so that the probe shell will not be damaged due to temperature influence and repeated use, and The position of the electronic current meter is no longer fixed at a single position of the insulating rod. The modified measuring instrument solves the problems that the probe is prone to damage during the winter load test and the position of the electronic current meter is fixed and cannot be moved flexibly, which improves the measurement reliability and convenience.

The technical scheme of the measuring instrument is as follows:

Rod-type clamp current measuring instrument, including a probe, an insulating rod, and an electronic current meter, is characterized in that the probe is a "U"-shaped magnet probe with a rubber material as an insulating sheath, and the electronic current meter is independently insulated Outside the rod, it is connected with the rod through an insulated wire.

The insulating poles are segmented, and can be adapted to different pole heights through different combinations.

The tail of the insulating rod is provided with two connecting wire jacks connected with the electronic current meter, and is connected with the two connecting wire jacks on the electronic current meter through insulated wires.

The beneficial effects of the present invention are as follows:

The rod-type clamp current measuring instrument is used for load testing in winter. Since the electronic current meter is independent of the insulating rod, it is relatively flexible to use, which avoids the display screen of the electronic current meter facing down in some measurement situations in the past. Or the phenomenon of inconvenient reading caused by the distance between the instrument and the measuring personnel. At the same time, the rod-type clamp current measuring instrument, because the main material of the outer insulation of the probe is rubber, will not be damaged in an environment with extremely low temperature, which improves the reliability of safe production.

Description of drawings

Fig. 1 is the front view of rod type clamp current measuring instrument of the present invention;

Fig. 2 is a side view of the rod type clamp current measuring instrument of the present invention;

Among them: (1) probe, (2) steel hoop for connection, (3) third-level insulating rod, (4) second-level insulating rod, (5) first-level insulating rod, (6) socket, (7) electronic current instrument, (8) rubber base, (9) connecting wire. the

Example

As shown in Figure 1-2, the insulating rod of the rod-type clamp current measuring instrument is processed by the power industry standard voltage-resistant 10kV insulating material to ensure insulation performance and mechanical strength. The insulating rods are divided into 3 levels, the third-level insulating rods 3, the second-level insulating rods 4 and the first-level insulating rods 5. The length of the first level is 1.8 meters, and the latter two levels are 1 meter. The outside of the insulating rod is smeared with yellow insulating paint, and the bottom has a rubber base 9 for shock absorption. The rod body is 0.3 meters away from the tail with a connecting line jack. The internal structure of the new probe 1 is exactly the same as that of the ordinary probe, both of which are composed of "U"-shaped magnets. The two ends of the magnet are wound with enough copper coils and connected with two wires with insulating sheaths. The difference is that the exterior of the new probe 1 is made of The 10kV pressure-resistant insulating rubber material is wrapped, and the rubber material must ensure insulation, and at the same time ensure that it is not deformed or even damaged when subjected to external forces. The bottom of the probe is fixed 2 on the top of the insulating rod by a steel hoop to ensure that the probe 1 will not rotate. The electronic current meter 7 is substantially the same as the common rod-type meter, both are 380V current ground measuring instruments, and are divided into two gears, "1000A" and "200A". Different from the ordinary type, the new instrument changes the upper and lower connecting plugs on the back of the original ordinary electronic current meter into the jack 7, and connects with the connecting wire 9 when in use. It is a 10kV withstand voltage wire wrapped with an insulating sheath, and the two ends of the wire are respectively equipped with plugs for connecting with the two sockets on the main body of the insulating rod. Before the load measurement in winter, insert the external wire plug of the electronic current meter into the insulating rod and the electronic current meter first, and then start the measurement work.

Claims (3)

1. Rod type pincer current measuring instrument, comprises probe, insulating rod, electronic current meter, it is characterized in that described probe is a kind of " U " type magnet probe as insulation sheath with rubber material, described electronic current meter In addition to the independent insulating rod, it is connected to the rod through an insulated wire. 2. The rod-type clamp current measuring instrument according to claim 1, characterized in that the insulating rod is segmented, and can adapt to different pole heights through different combinations. 3. The rod-type clamp current measuring instrument according to claim 1, characterized in that the tail of the insulating rod is provided with 2 connection wire jacks connected to the electronic current meter, through which the insulated wire is connected to the electronic current meter. The two cable jacks are connected.