CN213660888U

CN213660888U - Solid insulation looped netowrk cabinet

Info

Publication number: CN213660888U
Application number: CN202022655477.7U
Authority: CN
Inventors: 吕建萍
Original assignee: Xinjiang Hengrui Guoyuan Power Equipment Co ltd
Current assignee: Xinjiang Hengrui Guoyuan Power Equipment Co ltd
Priority date: 2020-11-17
Filing date: 2020-11-17
Publication date: 2021-07-09
Anticipated expiration: 2030-11-17

Abstract

The utility model relates to a solid insulation looped netowrk cabinet. The cabinet is internally provided with a bus chamber protection circuit, a solid insulation circuit breaker protection circuit, a cable chamber protection circuit, a main grounding protection circuit, an instrument chamber protection circuit and a protection circuit connection loop, wherein the bus chamber protection circuit is connected with a bus chamber shielding type connection bus grounding loop; the solid insulation circuit breaker protection circuit is connected with a solid insulation circuit breaker body grounding loop; the cable chamber protection circuit is connected with an indoor mutual inductor of the cable chamber, a lightning arrester and an in-out cable protection grounding loop; the instrument room protection circuit is connected with the secondary control instrument in the instrument room, the 485 shielding wire and the grounding loop of the instrument door, and the grounding conductor of each room protection loop is connected with the main grounding protection circuit through the protection circuit connection loop to form a complete grounding protection loop. The utility model discloses every electrical equipment all is equipped with the ground conductor, and the power automatic disconnection of being convenient for can prevent the bad consequence that electrical equipment internal fault and external circuit trouble arouse.

Description

Solid insulation looped netowrk cabinet

Technical Field

The utility model relates to a solid insulation looped netowrk cabinet belongs to the transformation technique of solid insulation looped netowrk cabinet.

Background

The existing 12kV solid insulation ring main unit has various grounding connecting wires such as a shielding connecting bus at the top of an inner cabinet, a solid insulation circuit breaker body, a touch cable plug connector, a touch lightning arrester, an incoming and outgoing cable grounding and a shielding 485 control cable, and the grounding connecting wires exist in a bus chamber, a circuit breaker chamber, a cable chamber and an instrument chamber in the 12kV solid insulation ring main unit and need to be connected with grounding wires. Various ground wires are usually connected nearby at a mounting bolt of the cabinet body and are not standard. The requirement that "structural members not complying with section 6.5.1.2.1.3 in GB/T3797-2016" should not be used as PEN conductors, but that copper or aluminum for the mounting rail could be used as PEN conductors "; the requirement that the 'secondary control instrument room is provided with a special independent grounding conductor' is not met according to the specification of item 7.1.2.4 in Q/GDW 730-2012.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to solve above-mentioned problem and provide a solid insulation looped netowrk cabinet. The utility model discloses because every electrical equipment all is equipped with ground conductor, the power automatic disconnection of being convenient for prevents the bad consequence that electrical equipment internal failure arouses, also can prevent the bad consequence that the external circuit trouble of electrical equipment power supply arouses.

The technical scheme of the utility model: the utility model discloses a solid insulation looped netowrk cabinet, the cabinet is built-in to be equipped with generating line room protection circuit, solid insulation circuit breaker protection circuit, cable chamber protection circuit, main ground protection circuit, instrument room protection circuit, protection circuit connection return circuit, generating line room protection circuit connection generating line room shielding type connection generating line ground circuit; the solid insulation circuit breaker protection circuit is connected with a solid insulation circuit breaker body grounding loop; the cable chamber protection circuit is connected with an indoor mutual inductor of the cable chamber, a lightning arrester and an in-out cable protection grounding loop; the instrument room protection circuit is connected with the secondary control instrument in the instrument room, the 485 shielding wire and the grounding loop of the instrument door, and the grounding conductor of each room protection loop is connected with the main grounding protection circuit through the protection circuit connection loop to form a complete grounding protection loop.

The utility model discloses a solid insulation looped netowrk cabinet satisfies in GB/T3797-2016 bar 6.5.1.2.1.1 expert then "all should have ground conductor's requirement in every electrical equipment, because every electrical equipment all is equipped with ground conductor, the power automatic disconnection of being convenient for prevents the bad consequence that electrical equipment internal failure arouses, also can prevent the bad consequence that the external circuit trouble of electrical equipment power supply arouses.

Drawings

Fig. 1 is a schematic view of the present invention.

Detailed Description

The front schematic diagram of the appearance structure of the utility model is shown in fig. 1, the solid insulation ring main unit of the utility model is provided with a bus chamber protection circuit 1, a solid insulation breaker protection circuit 2, a cable chamber protection circuit 3, a main grounding protection circuit 4, an instrument chamber protection circuit 5 and a protection circuit connection loop 6, wherein the bus chamber protection circuit 1 is connected with a bus chamber shielding type connection bus grounding loop; the solid insulation breaker protection circuit 2 is connected with a solid insulation breaker body grounding loop; the cable chamber protection circuit 3 is connected with an indoor mutual inductor of the cable chamber, a lightning arrester and an in-out cable protection grounding loop; the instrument room protection circuit 5 is connected with the secondary control instrument in the instrument room, the 485 shielding wire and the grounding loop of the instrument door, and the grounding conductor (protection conductor) of each room protection loop is connected with the main grounding protection circuit 4 through the protection circuit connection loop 6 to form a complete grounding protection loop.

In this embodiment, the ground conductor of the bus bar room protection circuit 1 is made of TMY-40 × 4 copper bus bar.

In this embodiment, the ground conductor of the solid-state insulation breaker protection circuit 2 is made of TMY-40 × 4 copper bus.

In this embodiment, the ground conductor of the cable chamber protection circuit 3 is made of a TMY-40 × 4 copper bus bar.

In this embodiment, the ground conductor of the instrument room protection circuit 5 is made of a TMY-40 × 4 copper bus bar.

In this embodiment, the ground conductor of the protection circuit connection circuit 6 is made of a TMY-40 × 4 copper bus bar.

In this embodiment, the ground conductor of the main ground protection circuit 4 is made of a TMY-50 × 5 copper bus bar.

The utility model discloses independent copper busbar ground conductor is all designed to the generating line room of solid insulation looped netowrk cabinet, solid insulation circuit breaker room, cable chamber to run through the intercommunication back through TMY-40X 4 copper bus and reliably be connected with total ground connection generating line TMY-50X 5, each contact surfaceThe copper conductor is adopted as the grounding conductor, and the current density is not more than 100A/mm under the specified grounding fault condition when the rated short-circuit current duration is 2s²But the minimum sectional area should be not less than 240mm². The tail end of the grounding conductor is connected with the grounding system of the equipment by a copper terminal, the electrical contact area of the terminal is suitable for the section of the grounding conductor, but the minimum electrical sectional area is not less than 160mm²"is required. The instrument room is made of TMY-40 x 4 copper bus to make special independent grounding conductor, and passes through BVR-10mm²The special yellow-green grounding wire is reliably connected with the total grounding bus, and meets the rated working current I of 'provision of copper-protected sectional area' in the table 3 of the clause 6.5.1.2.1.3 in GB/T3797-2016_eLess than or equal to 20, and the section of the protection conductor is the same as that of the phase conductor.

The utility model discloses all connect with ground conductor (protection conductor) with electrical component, cable, shell in the cabinet of solid insulation looped netowrk cabinet, guarantee that leakage current can directly channel into the earth to cause the action of protection component, cut-off circuit, in order to reach protective apparatus and personnel's purpose.

The utility model relates to a preparation suitable for solid insulation looped netowrk cabinet protection circuit integrality improves technology uses in 12kV solid insulation looped netowrk cabinet distribution device, satisfies GB/T3797-2016 electrical control equipment, Q GDW730-2012 12kV solid insulation looped netowrk cabinet technical condition' requirement, realizes preventing the requirement of the consequence that automatically controlled equipment internal failure arouses.

The utility model discloses a solid insulation looped netowrk cabinet satisfies the requirement that strip 6.5.1.2.1.1 leads to rule "should have the protection conductor in every electrical equipment in GB/T3797-2016, the power automatic disconnection of being convenient for". The bus chamber, the breaker chamber and the cable chamber are all designed with independent copper bus grounding conductors and are reliably connected with the total grounding bus TMY-50X 5 after being communicated through the TMY-40X 4 copper bus; the instrument room is made of TMY-40 x 4 copper bus to make special independent grounding conductor, and passes through BVR-10mm²And the yellow-green special grounding wire is reliably connected with the main grounding bus. Ensure that 12kV is fixedPrimary element, cable, secondary element, 485 shielded wire reliably ground connection in the insulating looped netowrk cabinet of body in succession, realize article 6.5.1.2.1.1 rule in GB/T3797-2016: the utility model discloses every electrical equipment all is equipped with the protection conductor, the power automatic disconnection of being convenient for: preventing consequences caused by internal faults (e.g. based on insulation damage) of the electric control equipment; the consequences caused by the fault of the external circuit for supplying power to the electric control equipment (for example, based on the insulation damage) are prevented.

Claims

1. A solid insulation ring main unit is characterized in that a bus chamber protection circuit, a solid insulation breaker protection circuit, a cable chamber protection circuit, a main grounding protection circuit, an instrument chamber protection circuit and a protection circuit connection loop are arranged in the ring main unit, and the bus chamber protection circuit is connected with a bus chamber shielding type connection bus grounding loop; the solid insulation circuit breaker protection circuit is connected with a solid insulation circuit breaker body grounding loop; the cable chamber protection circuit is connected with an indoor mutual inductor of the cable chamber, a lightning arrester and an in-out cable protection grounding loop; the instrument room protection circuit is connected with the secondary control instrument in the instrument room, the 485 shielding wire and the grounding loop of the instrument door, and the grounding conductor of each room protection loop is connected with the main grounding protection circuit through the protection circuit connection loop to form a complete grounding protection loop.

2. The solid insulation ring main unit as claimed in claim 1, wherein the grounding conductor of the bus bar room protection circuit is made of TMY-40 x 4 copper bus bar.

3. The solid insulation ring main unit as claimed in claim 1, wherein the grounding conductor of the protection circuit of the solid insulation circuit breaker is made of TMY-40 x 4 copper bus.

4. The solid insulation ring main unit as claimed in claim 1, wherein the grounding conductor of the cable chamber protection circuit is made of TMY-40 x 4 copper bus.

5. The solid insulation ring main unit as claimed in claim 1, wherein the grounding conductor of the instrument room protection circuit is made of TMY-40 x 4 copper bus.

6. The solid insulation ring main unit as claimed in claim 1, wherein the grounding conductor of the protection circuit connection loop is made of TMY-40 x 4 copper bus.

7. The solid insulation ring main unit as claimed in claim 1, wherein the grounding conductor of the main grounding protection circuit is made of TMY-50 x 5 copper bus.