CN204348948U - A kind of capacitor integration discharging rod - Google Patents

Abstract

An integrated discharge rod for capacitors, including a discharge arm, a contact fitting connected to the front end of the discharge arm, and an insulating rod connected to the rear end of the discharge arm. A discharge resistor is arranged in the inner cavity of the discharge arm, and the front end of the discharge resistor is electrically connected to the contact fitting through a wire , the rear end of the discharge resistor is led to the ground terminal through a wire, the first metal shorting piece is drawn out through a wire between the discharge resistor and the contact fitting, and the second metal shorting piece is drawn out through a wire between the discharge resistor and the grounding end, the first and the second Both the two metal shorting pieces and the grounding end are arranged on the insulating shell of the discharge arm, and the third metal shorting piece is also connected to the insulating shell of the discharge arm. The single capacitor design of the capacitor bank of the utility model can realize the simple and reliable conversion from the discharge of the serial resistance to the direct ground discharge function, is convenient for observation, has high safety, and can ensure the safety and reliability of the entire discharge operation, effectively improving the operation and maintenance of operators. safety and productivity.

Description

A capacitor integrated discharge rod

technical field

The utility model relates to a capacitor discharge rod, in particular to a capacitor integrated discharge rod.

Background technique

Distributed capacitor banks are widely used in power systems. The capacitors of quite a few products are basically protected by external fuses. The external fuses of capacitor banks often blow out during operation, so it is necessary to detect the individual capacitance and replace the fuses. silk and other work. For this type of operation, the basic requirements for protecting the safety of operators before work and the relevant regulations of the "Safety Regulations" all require that the capacitors separated from the entire group of capacitors should be directly grounded and discharged several times one by one to ensure the safety of the operation. Due to the loud sound and sparks during the initial discharge, there are certain unsafe factors and even endanger personal safety. Therefore, it is required to design the discharge rod to discharge through the series resistor first, and then to discharge directly to the ground.

At present, the main problems in discharging capacitors during capacitor operation are:

1. Three-pole 10kV, 35kV or 110kV grounding wires are generally used in discharging capacitors. 10kV grounding wires are seldom used due to short insulating rods and small three-phase roots, while grounding wires above 35kV are very bulky. Therefore, there are problems such as inconvenient operation in the discharge process.

2. When many capacitor bodies are discharged, due to the instantaneous discharge of the energy-stored capacitor, the sound is loud and there are sparks, which has certain unsafe factors and even endangers personal safety.

3. There are some discharge rods for other purposes on the market, and some units have been applied to capacitor discharge. Because their design is not suitable for 10kV and other distributed single capacitors, if some series discharge resistance values are selected to be large, tens of More than one MΩ, when the capacitor (such as a fuse blown) is discharged, because the initial current is very small, the operator may easily misunderstand that the capacitor has no residual voltage, and some capacitors have a very high residual voltage after discharging for more than 5 minutes, and even some units still exist. Because of the danger of personal electric shock, the relevant management departments of these units have formulated regulations, such as discharging for 5 to 20 minutes and then using direct grounding for discharge, etc., which are not in line with actual operations.

Utility model content

The main purpose of the utility model is to overcome the shortcomings of the prior art, to provide a simple and reliable conversion from serial resistance discharge to direct ground discharge, which is easy to observe, high in safety, and can ensure the safety and reliability of the entire discharge operation , a capacitor integrated discharge rod that effectively improves the operation safety and work efficiency of operation and maintenance personnel.

The utility model adopts the following technical solutions:

An integrated discharge rod for capacitors, including a discharge arm, a contact fitting connected to the front end of the discharge arm, and an insulating rod connected to the rear end of the discharge arm. A discharge resistor is arranged in the inner cavity of the discharge arm, and the front end of the discharge resistor is electrically connected to the In the contact fittings, the rear end of the discharge resistor is led to the ground terminal through a wire, a first metal shorting piece is led out through a wire between the discharge resistor and the contact fitting, and a second metal short is led out through a wire between the discharge resistor and the ground end. Metal shorting pieces, the first and second metal shorting pieces and the grounding end are all arranged on the insulating shell of the discharge arm, and the third metal shorting piece is also connected to the insulating shell of the discharge arm.

Further, the discharge resistor is a resistor with a resistance value of 60kΩ and a power of 30W.

Further, the insulating rod is composed of two telescopic connections.

Further, the maximum length of the stretched insulating rod is 1250 mm, and the overall length of the discharge rod is greater than 1.5 m.

Further, the shell of the discharge arm is made of transparent insulating material.

Further, the ground terminal is connected to a ground wire.

Further, the grounding wire is a multi-strand annealed copper wire with a transparent sheath, with a cross-section of 10mm ² .

As can be seen from the above description of the utility model, compared with the prior art, the utility model has the following beneficial effects:

First, it is suitable for discharging a single capacitor of a 10kV capacitor bank, and can consume most of the residual charge of the capacitor within 3 seconds, and can be used as a multiple grounding discharge of a single capacitor after the individual fuse of the capacitor bank is blown. It can also be used as a capacitor bank for normal shutdown and maintenance, and the single capacitor is grounded and discharged multiple times. It is safe and easy to use, which can ensure the safety and reliability of the entire discharge operation, and effectively improve the operation safety and work efficiency of operation and maintenance personnel;

Second, by setting the first, second, and third metal shorting pieces, and by shorting the second and third metal shorting pieces, series resistance discharge can be realized, and by connecting the first and second metal shorting pieces Short circuit can realize direct discharge to ground, can realize simple and reliable conversion from serial resistance discharge to direct ground discharge function, and can ensure the safety, reliability and convenience of the whole operation;

Third, the shell of the discharge arm is made of transparent insulating material, which can ensure that the internal wiring is clear at a glance, and the operator can see clearly when directly discharging to the ground;

In a word, the utility model is designed for a single capacitor in the capacitor bank, which can realize the simple and reliable conversion from the serial resistance discharge to the direct ground discharge function, which is easy to observe, has high safety, is convenient to use, and can ensure that the entire discharge operation is safe, reliable and effective. Improve the operational safety and work efficiency of operation and maintenance personnel.

Description of drawings

Fig. 1 is the structural representation of the discharge arm of the specific embodiment of the present invention;

Fig. 2 is a schematic diagram of the overall structure of a specific embodiment of the present invention.

In the figure: 1. Discharge arm, 2. Contact fittings, 3. Insulation rod, 4. Discharge resistor, 5. Ground terminal, 6. First metal shorting piece, 7. Second metal shorting piece, 8. Third Metal shorting piece, 9. Ground wire.

Detailed ways

The utility model will be further described below through specific embodiments.

Referring to Fig. 1 and Fig. 2, a kind of capacitor integrated discharge rod of the present utility model comprises discharge arm 1, the contact fitting 2 that is connected to the front end of discharge arm 1 and the insulating rod 3 that is connected to the rear end of discharge arm 1, and described discharge The shell of the arm 1 is made of transparent insulating material, and the inner cavity of the discharge arm 1 is provided with a discharge resistor 4, the discharge resistor 4 is a resistor with a resistance value of 60kΩ and a power of 30W, and the front end of the discharge resistor 4 is electrically connected to the contact fitting 2 through a wire , the rear end of the discharge resistor 4 is led to the ground terminal 5 through a wire, a first metal shorting piece 6 is drawn between the discharge resistor 4 and the contact fitting 2 through a wire, and a wire is used between the discharge resistor 4 and the ground terminal 5 A second metal short-connector 7 is drawn out, and the first metal short-connector 6, the second metal short-connector 7 and the ground terminal 5 are all arranged on the insulating shell of the discharge arm 1, and the insulating shell of the discharge arm 1 A third metal shorting piece 8 is also connected to it.

The insulating rod 3 is composed of two stretchable sections, the maximum length of the insulating rod 3 after stretching is 1250mm, and the overall length of the discharge rod is greater than 1.5m.

The grounding terminal 5 is connected to a grounding wire 9, and the grounding wire 9 is a multi-strand annealed copper wire with a transparent sheath, with a cross section of 10mm ² .

Referring to Fig. 1 and Fig. 2, when the utility model discharges a 10kV capacitor, the second metal shorting piece 7 and the third metal shorting piece 8 are short-circuited first, and the serial resistance is discharged, which can be discharged within 3 seconds. Most of the residual charge of the capacitor is consumed, and then the first metal shorting piece 6 and the second metal shorting piece 7 are short-circuited to discharge directly to the ground to consume all the remaining charge of the capacitor.

The utility model can be used for capacitor banks of different KV levels by changing the component parameters in the same way.

The above is only a specific embodiment of the present utility model, but the design concept of the present utility model is not limited thereto, any non-substantial modification of the utility model by using this concept should be an act of violating the protection scope of the present utility model .

Claims (7)

1. a capacitor integration discharging rod, include electric discharge arm, be connected to the contact gold utensil of electric discharge arm front end and be connected to the insulating bar of electric discharge arm rear end, it is characterized in that: in described electric discharge arm inner chamber, be provided with discharge resistance, discharge resistance front end is electrically connected on contact gold utensil by wire, discharge resistance rear end leads to earth terminal by wire, described discharge resistance draws one first metal short circuit sheet by wire with contacting between gold utensil, one second metal short circuit sheet is drawn by wire between described discharge resistance and earth terminal, described first, second metal short circuit sheet and earth terminal are all arranged on the insulation crust of electric discharge arm, the insulation crust of described electric discharge arm is also connected with the 3rd metal short circuit sheet.

2. a kind of capacitor integration discharging rod as claimed in claim 1, is characterized in that: described discharge resistance adopts the resistance of resistance 60k Ω, power 30W.

3. a kind of capacitor integration discharging rod as claimed in claim 1, is characterized in that: described insulating bar scalablely to connect and compose by two sections.

4. a kind of capacitor integration discharging rod as claimed in claim 3, is characterized in that: the maximum length after described insulating bar stretches is 1250mm, and the entire length of discharging rod is greater than 1.5m.

5. a kind of capacitor integration discharging rod as claimed in claim 1, is characterized in that: the shell of described electric discharge arm adopts transparent insulation material.

6. a kind of capacitor integration discharging rod as claimed in claim 1, is characterized in that: described earth terminal connects earth connection.

7. a kind of capacitor integration discharging rod as claimed in claim 6, is characterized in that: described earth connection adopts the multiply annealed copper wire of band transparent sheath, and cross section is 10mm ².