CN205539140U - A high-precision current test meter for power transmission and transformation - Google Patents

Abstract

The utility model discloses a high-precision current test meter for power transmission and transformation. The top; a handle is set between the shell and the electromagnetic shield; the bottom of the shell is provided with a display screen, and function keys are installed around the display screen; range selection is set between the function keys and the clamp iron core Knob, and the range selection knob is installed on the shell; this kind of high-precision ammeter for power transmission and transformation is compact in structure, easy to carry, easy to operate, easy to use, safe and reliable, and can effectively improve the anti-electromagnetic interference ability of the current test meter, so that it can accurately and stably The current value is measured to improve the live detection level, which has good social and economic benefits and is suitable for popularization and use.

Description

A high-precision current test meter for power transmission and transformation

technical field

The utility model relates to a current test meter, in particular to a high-precision current test meter for power transmission and transformation, which belongs to the technical field of electric power measurement.

Background technique

With the continuous advancement of the state maintenance of power transmission and transformation equipment mainly based on live detection, more and more fixed and mobile live detection technologies are applied to the state detection of power transmission and transformation equipment, and non-stop detection is becoming increasingly possible. The source of state evaluation data for power transmission and transformation equipment in the power grid is increasingly focused on the test results of live detection, and the accuracy and precision of live detection data is particularly important. Clamp ammeters are usually used in power systems to detect iron core ground current live current. Although the clamp meters have high precision, they are extremely susceptible to on-site electromagnetic interference, and the detected values are jumping and extremely unstable, which affects the detection results. Therefore, in response to the above problems, we propose a high-precision current test meter for power transmission and transformation.

Utility model content

Aiming at the problems in the prior art above, the utility model provides a high-precision current test meter for power transmission and transformation. The electric energy meter has an electromagnetic shielding cover, which greatly improves the anti-interference ability of the current test meter and solves the problems existing in the background technology .

In order to achieve the above purpose, the technical solution adopted by the utility model is: a high-precision current test meter for power transmission and transformation, including a casing and a clamp-shaped iron core arranged on the top of the casing; one side of the clamp-shaped iron core is equipped with an electromagnetic shielding cover, and the electromagnetic shielding cover is welded on the top of the shell; a handle is set between the shell and the electromagnetic shielding cover; a display screen is provided at the bottom of the shell, and function keys are installed around the display screen; the function keys and A range selection knob is arranged between the clamp iron cores, and the range selection knob is installed on the shell.

Further, there are six function keys, and the area of the function keys is one-sixth of the display screen.

Further, the clamp iron core has two semicircular structures.

Further, the diameter of the electromagnetic shielding case is larger than the diameter of the clamp iron core.

Further, the handle is slidably connected to the casing.

The beneficial effects of the utility model are: the high-precision ammeter for power transmission and transformation is compact in structure, easy to carry, simple to operate, easy to use, safe and reliable, does not need power-off detection, improves the live detection level, and can effectively improve the anti-electromagnetic interference of the current test meter ability, so that the current value can be measured accurately and stably, which improves the test accuracy.

Description of drawings

Figure 1 is a schematic diagram of the overall structure of the utility model.

In the figure: 1. Electromagnetic shielding cover, 2. Handle, 3. Shell, 4. Function keys, 5. Display screen, 6. Range selection knob, 7. Clamp iron core.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

As shown in Figure 1, a high-precision current test meter for power transmission and transformation includes a casing 3 and a clamp iron core 7 arranged on the top of the casing 3; an electromagnetic shielding cover 1 is installed on one side of the clamp iron core 7, and The electromagnetic shielding cover 1 is welded on the top of the shell 3; the handle 2 is arranged between the shell 3 and the electromagnetic shielding cover 1; the bottom end of the shell 3 is provided with a display screen 5, and function keys 4 are installed around the display screen 5 ; The range selection knob 6 is set between the function key 4 and the pincer core 7, and the range selection knob 6 is installed on one side of the shell 3.

As an optimized technical solution of the present utility model: there are six function keys 4, and the area of the function keys 4 is one-sixth of the display screen 5; the pincer core 7 is a structure of two semicircles; The diameter of the electromagnetic shielding cover 1 is larger than that of the pliers core 7 ; the handle 2 and the shell 3 are slidingly connected.

When the utility model is in use, the clamp-shaped iron core 7 and the electromagnetic shielding cover 1 are opened by pressing the handle 2, and the measured current-carrying wire is placed in the rectangular hole left on the electromagnetic shielding cover 1. When the variable current passes, the magnetic flux of the AC current induces a current in the secondary winding of the transformer. The current passes through the conversion circuit, and the measured current value is displayed on the display screen 5. After putting the measured wire into the jaws, pay attention The two sides of the jaws have a good match, and no other objects can be placed in the middle.

It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, no matter from all points of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, so it is intended to be included in the claims All changes within the meaning and range of equivalents of the required elements are included in the present invention. Any reference sign in a claim should not be construed as limiting the claim concerned.

The above are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any minor modifications, equivalent replacements and improvements made to the above embodiments according to the technical essence of the present utility model shall be included in the Within the scope of protection of the technical solution of the utility model.

Claims (5)

1. A high-precision current test meter for power transmission and transformation, comprising a shell (3) and a pincer core (7) arranged on the top of the shell (3); it is characterized in that: one of the pincer cores (7) An electromagnetic shielding cover (1) is installed on the side, and the electromagnetic shielding cover (1) is welded on the top of the shell (3); a handle (2) is arranged between the shell (3) and the electromagnetic shielding cover (1); the shell (3) ) is provided with a display screen (5), and a function key (4) is installed around the display screen (5); a range selection knob is set between the function key (4) and the clamp iron core (7) (6), and the range selection knob (6) is installed on one side of the casing (3). 2. A kind of power transmission and transformation high-precision current test meter according to claim 1, characterized in that: there are six function keys (4), and the area of the function keys (4) is 1.5 times that of the display screen (5) one-sixth. 3. A high-precision current test meter for power transmission and transformation according to claim 1, characterized in that: the clamp iron core (7) has a structure of two semicircles. 4. A high-precision current test meter for power transmission and transformation according to claim 1, characterized in that: the diameter of the electromagnetic shielding cover (1) is larger than the diameter of the clamp iron core (7). 5. A high-precision current test meter for power transmission and transformation according to claim 1, characterized in that: said handle (2) is in sliding connection with said housing (3).