CN204290193U - A kind of electric cable protector - Google Patents

Abstract

The utility model provides a cable protector, which comprises a cable protector element and a counter. The cable protector is respectively provided with a high-voltage terminal and an installation grounding terminal. The high-voltage terminal is electrically connected with the metal outer sheath of the cable. The lower end of the device element, the high voltage end of the counter is connected to the low voltage end of the cable protector element and is insulated from the installation ground end, the cable protector element is fixed on the installation bracket through the installation ground end, and the installation ground end is connected to the ground wire, the cable protector solves the problem of The problem of overvoltage limitation on the metal outer sheath of the power cable and the monitoring of the operating state parameters of the cable protector prevents the metal outer sheath of the power cable from overvoltage damage, improves the operational reliability of the cable protector, and protects the power supply. The cable runs safely.

Description

a cable protector

technical field

The utility model relates to the field of lightning arresters, in particular to a cable protector.

Background technique

The cable protector is an important overvoltage protection device for power cables. It is connected between the metal outer sheath of the protected power cable and the ground, and is used to protect the metal outer sheath of the power cable from overvoltage damage. During the operation of the power cable, the induced voltage and fault overvoltage on the metal sheath of the power cable must be limited to prevent the overvoltage from breaking down the insulation of the outer sheath of the cable, causing multi-point grounding faults on the metal sheath of the cable, affecting the normal operation of the power cable and reducing The service life of the cable is monitored, and the operating state parameters of the cable protector are monitored.

Existing power cable protectors cannot obtain their operating parameters, cannot monitor the operating status of the protector in real time, cannot be quickly repaired when the protector fails, and cannot effectively protect the cable.

Utility model content

The purpose of the utility model is to overcome the defects of the prior art, provide a cable protector, which can effectively limit the overvoltage on the metal outer sheath of the power cable, and solve the problems of the installation of the cable protector and the monitoring of operating state parameters.

In order to achieve the above object, the utility model has been realized by adopting the following technical solutions.

A cable protector, including a cable protector component and a counter, the two ends of the cable protector are respectively provided with a high-voltage terminal and an installation grounding terminal, the high-voltage terminal is electrically connected to the metal outer sheath of the cable, and the counter is installed at the lower end of the cable protector component , The high-voltage end of the counter is connected to the low-voltage end of the cable protector element and insulated from the installation ground end, the cable protector element is fixed on the installation bracket through the installation ground end, and the installation ground end is connected to the ground wire.

Further, the jacket of the cable protector element is a composite jacket, a porcelain jacket or a resin jacket; the jacket of the cable protector element is in the shape of an umbrella skirt, and the umbrella shape is an equal-diameter umbrella or a large and small umbrella, and the composite jacket and the resin jacket are integrally formed; the cable protection The internal functional components of the device are composed of zinc oxide resistors stacked in series.

Further, the lower end of the cable protector element is directly connected to the flange of the counter through bolts, and is sealed by a sealing ring, and the cross section of the sealing ring is circular, oval or rectangular.

Further, the sampling unit of the counter is a resistance sheet or a transformer coil; the counter is a pointer type, a mechanical digital type or a liquid crystal type.

Further, the counter is provided with a data interface, and the counter is connected to the IED through the data interface, and uploads the action times of the cable protector to the IED.

Further, the cable protector element and the counter form an integral structure.

The utility model is characterized in that:

The cable protector of the utility model includes the cable protector element and the counter, which realizes the overvoltage limit on the metal outer sheath of the power cable, and monitors the operating state parameters of the cable protector through the counter to realize real-time protection for the cable, so that The metal outer sheath of the power cable is protected from overvoltage damage, which improves the operation reliability of the cable protector and ensures the safe operation of the power cable; the installation grounding terminal is connected and fixed with the installation bracket by bolts, and the cable protector realizes the cable protector component Integrated with the counter, the installation structure is simple and convenient.

Further, the counter is provided with a data interface, through which the number of actions of the cable protector can be uploaded to the IED to realize remote monitoring of the protector.

Further, the cable protector element and the counter are assembled as a whole, the overall structure occupies less space, has stronger practicability, and can be installed in any desired position.

Description of drawings

Figure 1 is a schematic structural view of a cable protector;

In the figure: 1. High voltage terminal; 2. Cable protector component; 3. Counter; 4. Installation grounding terminal.

Detailed ways

The utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

Referring to FIG. 1 , the cable protector of the present invention includes a high-voltage terminal 1 , a cable protector element 2 , a counter 3 , and an installation ground terminal 4 .

The upper and lower ends of the cable protector are respectively provided with a high-voltage terminal 1 and an installation grounding terminal 4. The high-voltage terminal 1 is electrically connected to the metal outer sheath of the cable. The counter 3 is installed at the lower end of the cable protector element 2. The high-voltage terminal of the counter 3 is connected to the The low-voltage end of the cable protector element is connected and insulated from the counter flange and the installation ground terminal 4, the cable protector element 2 is fixed on the installation bracket through the installation ground terminal 4, and the installation ground terminal 4 is connected to the ground wire.

Further, the jacket of the cable protector element 2 can be a composite jacket, a porcelain jacket or a resin jacket; the jacket of the cable protector element 2 is in the shape of an umbrella skirt, and the umbrella shape is an equal-diameter umbrella or a large and small umbrella, and the composite jacket and the resin jacket are integrally formed; The internal functional element of the protector element 2 is composed of zinc oxide resistance sheets stacked in series.

Further, the lower end of the cable protector element 2 is directly connected to the flange of the counter 3 through bolts, and is sealed by a sealing ring. The cross section of the sealing ring is circular, oval or rectangular, and the cable protector element 2 and the counter 3 are An integral structure; the cable protector element 2 can also be installed separately, and its lower end is independently sealed, and the low-voltage end of the cable protector element 2 is connected to the high-voltage end of the counter 3 through wires and bolts.

Further, the sampling unit of the counter 3 can be a resistance sheet or a transformer coil; the counter 3 can be a pointer type, a mechanical digital type or a liquid crystal type; the counter 3 can also be provided with a data interface, and the counter is connected to the IED through the data interface to protect the cable The number of actions of the device is uploaded to the IED.

When assembling, put the resistor column and spring into the jacket of the cable protector element 2, connect the lower end flange of the cable protector element 2 directly to the flange of the counter 3 through bolts, compress the resistor column through the spring, and pass the seal The high-voltage terminal 1 is electrically connected to the cable metal outer sheath through bolts; the installation ground terminal 4 is connected to the installation bracket through bolts, and the ground terminal 4 is connected to the ground wire through the installation.

Claims (6)

1. A cable protector, characterized in that: it comprises a cable protector element (2) and a counter (3), the two ends of the cable protector are respectively provided with a high-voltage terminal (1) and an installation grounding terminal (4), and the high-voltage connection End (1) is electrically connected to the metal outer sheath of the cable, the counter (3) is installed at the lower end of the cable protector element (2), the high voltage end of the counter (3) is connected to the low voltage end of the cable protector element (2) and is connected to the installation grounding end (4) Insulation, the cable protector element (2) is fixed on the installation bracket through the installation ground terminal (4), and the installation ground terminal (4) is connected to the ground wire. 2. The cable protector according to claim 1, characterized in that: the jacket of the cable protector element (2) is a composite jacket, porcelain jacket or resin jacket; the jacket of the cable protector element (2) is in the shape of an umbrella skirt, The umbrella shape is equal-diameter umbrella or large-and-large umbrella, and the composite jacket and the resin jacket are integrally formed; the internal functional element of the cable protector element (2) is composed of zinc oxide resistance sheets stacked in series. 3. The cable protector according to claim 1, characterized in that: the lower end of the cable protector element (2) is directly connected to the flange of the counter (3) through bolts, and is sealed by a sealing ring, and the sealing ring is horizontal The section is circular, oval or rectangular. 4. The cable protector according to claim 1, characterized in that: the sampling unit of the counter (3) is a resistance sheet or a transformer coil; the counter (3) is a pointer type, a mechanical digital type or a liquid crystal type. 5. The cable protector according to claim 1, characterized in that: the counter (3) is provided with a data interface, the counter is connected to the IED through the data interface, and uploads the number of actions of the cable protector to the IED. 6. The cable protector according to claim 1, characterized in that: the cable protector element (2) and the counter (3) are an integral structure.