CN205880040U - Capacitor bank unbalance current testing arrangement - Google Patents

Abstract

The utility model relates to a capacitor bank unbalanced current testing device, which belongs to the technical field of capacitor bank unbalanced current testing, and comprises a main body of a measuring device, four transmission lines and three signal lines. The main body of the measuring device includes a high-voltage generator and a current Measuring device, the high-voltage generator is provided with four terminals, the four transmission lines are respectively electrically connected to the four terminals, the current measuring device is provided with three insertion holes, and the three signal lines They are respectively inserted into the three plug-in holes, and a display screen is installed on the front part of the main body of the measuring device, and the display screen is electrically connected to the current measuring device, and the right side of the main body of the measuring device is provided for storing four There is a slot for placing wires and three signal wires, and a handle is provided on the upper part. The utility model is easy to use and simple in structure. The high-voltage generator and the current measuring device are arranged on one device, which is convenient for measurement, and is provided with a placement slot for placing transmission lines and signal lines.

Description

A capacitor bank unbalanced current testing device

technical field

The utility model belongs to the technical field of capacitor group unbalanced current testing, in particular to a capacitor group unbalanced current testing device.

Background technique

The HVDC power transmission system is an important part of today's power grid, which realizes the long-distance and large-capacity transmission of power. As one of the important equipment of the system, the AC-DC filter is of great significance for its safe and reliable operation. The protection of the AC and DC filter is mainly to protect the unbalance of the high-voltage capacitor bank. By detecting the unbalanced current of the capacitor bank, it is judged whether there is a fault in the capacitor bank, and corresponding protection measures are taken.

At present, the unbalanced current of this type of capacitor bank is generally tested by adding a booster and a microammeter. Since the unbalanced current is small, a high voltage of several hundred volts is applied to the capacitor bank under test through the booster. Increase the size of the unbalanced current to detect a small unbalanced current. However, this method requires two devices, a booster and a microammeter, which are inconvenient to use and affect measurement efficiency.

In view of the deficiencies in the prior art, this technical field urgently needs a new technical solution to solve the problems in the prior art.

Contents of the invention

The technical problem to be solved by the utility model is to provide a capacitor bank unbalanced current testing device for the deficiencies and defects of the prior art.

The utility model proposes following technical scheme:

A capacitor bank unbalanced current testing device, comprising a measuring device main body, a transmission line and a signal line, characterized in that a high-voltage generator and a current measuring device are arranged inside the measuring device main body, and a display is installed outside the measuring device main body screen and a placement slot; the high voltage generator is provided with binding posts, and the number of binding posts is four; the current measuring device is provided with an insertion hole, and the number of insertion holes is three; the number of the transmission lines is Four, the four transmission lines are respectively electrically connected to the four terminal posts; the number of the signal lines is three, and the three signal lines are all provided with current transformers, and the three signal lines are respectively plugged into the three insertion holes; The display screen is electrically connected with the current measuring device.

Preferably, a handle is provided on the top of the main body of the measuring device.

Preferably, the placement slot is provided with a door, and the door is installed on the placement slot through a sliding slot.

Through the above design scheme, the utility model can bring the following beneficial effects:

1. The utility model is simple in structure and easy to use. The high-voltage generator and the current measuring device are arranged on one device, which is convenient for measurement.

2. The main body of the measuring device is provided with a slot for placing power lines and signal lines. When not in use, put the power line and signal line into the slot for easy transportation and storage.

Description of drawings

The utility model will be further described below in conjunction with description of drawings and specific embodiments:

Fig. 1 is a structural schematic diagram of a capacitor bank unbalanced current testing device of the present invention.

Fig. 2 is a schematic diagram of a capacitor bank unbalanced current testing device of the present invention.

In the figure: 1-measuring device main body, 11-high voltage generator, 111-terminal, 12-current measuring device, 121-wire hole, 13-display screen, 14-placement slot, 15-handle, 2-power transmission line, 3-signal line, 31-current transformer.

detailed description

Please refer to Fig. 1 and Fig. 2, the utility model provides a kind of capacitor bank unbalanced current testing device, comprises measuring device main body 1, four transmission lines 2 and three signal lines 3, and described measuring device main body 1 includes: for A high-voltage generator 11 that generates high-voltage three-phase voltage; and a current measuring device 12 for measuring unbalanced current; the high-voltage generator 11 is provided with four terminals 111, and the four transmission lines 2 are electrically connected to the four terminals 111; the current measurement device 12 is provided with three insertion holes 121, and the three signal lines 3 are respectively inserted in the three insertion holes 121; the front part of the measurement device main body 1 is equipped with a display screen for displaying unbalanced current test information 13. The display screen 13 is electrically connected to the current measuring device 12; the right side of the measuring device main body 1 is provided with a placement slot 14 for storing four power lines 2 and three signal lines 2. The three signal lines 3 are all provided with a current transformer 31, and the current transformer 31 is used to measure the current flowing through the capacitor bank. The placement slot 14 is provided with a door, and the door is installed on the placement slot 14 through a sliding slot. A handle 15 is provided on the top of the measuring device main body 1 .

Fig. 2 shows the working principle diagram of the capacitor bank unbalanced current testing device of the present invention. The high-voltage generator 11 is used to generate high-voltage three-phase voltage, and the generated high-voltage three-phase electricity is output through four transmission lines 2. When in use, the four transmission lines 2 are respectively connected to the capacitor bank, and the current transformer 31 measures the current flowing through the capacitor. The current of the group is transmitted to the current measuring device 12 through the signal line 3, and the current measuring device 12 measures the current and displays it on the display screen 13.

The above-mentioned embodiments are preferred implementation modes of the present utility model, which are only used to facilitate the description of the present utility model, and are not intended to limit the present utility model in any form. Anyone with ordinary knowledge in the technical field, if they do not depart from this utility model Within the scope of the technical features mentioned in the utility model, the equivalent embodiments that use the technical content disclosed in the utility model to make partial changes or modifications, and do not deviate from the technical features of the utility model, still belong to the technical features of the utility model within range.

Claims (3)

1. A capacitor bank unbalanced current testing device, comprising a measuring device main body (1), a power line (2) and a signal line (3), is characterized in that, the inside of the measuring device main body (1) is provided with a high-voltage generator device (11) and current measuring device (12), the outside of the measuring device main body (1) is equipped with a display screen (13) and a placement slot (14); the high voltage generator (11) is provided with a binding post (111) , the number of binding posts (111) is four; the current measuring device (12) is provided with a wire hole (121), and the number of the wire hole (121) is three; the number of the power line (2) is Four, the four transmission lines (2) are respectively electrically connected to the four terminal posts (111); the number of the signal lines (3) is three, and the three signal lines (3) are all provided with current transformers (31) , the three signal lines (3) are plugged into the three wire holes (121) respectively; the display screen (13) is electrically connected to the current measuring device (12). 2. A capacitor bank unbalanced current testing device according to claim 1, characterized in that: a handle (15) is provided on the top of the main body (1) of the measuring device. 3. A capacitor bank unbalanced current testing device according to claim 1, characterized in that: the placement slot (14) is provided with a door, and the door is installed on the placement slot (14) through a chute .