CN-121983461-A - Horizontal environment-friendly gas-insulated metal-enclosed switch with auxiliary arc extinction by isolating grounding zone

Abstract

The invention relates to the field of power switches, in particular to a horizontal environment-friendly gas-insulated metal-enclosed switch with an isolated grounding zone for auxiliary arc extinction. The quick-action type electromagnetic field isolating switch comprises an insulating sleeve, a bus, a grounding switch, isolating switches, a current transformer, a circuit breaker and a quick grounding switch, wherein the insulating sleeve is provided with two vacuum arc-extinguishing chambers which are arranged in series, the vacuum arc-extinguishing chambers are filled with environment-friendly gas, the isolating switches are provided with two electromagnetic field emitting structures which assist in arc extinction, the two isolating switches are respectively connected to two ends of the circuit breaker through the current transformer, the grounding switch is arranged on one isolating switch and connected with one insulating sleeve through the bus, the quick grounding switch comprises a permanent magnetic field structure which assists in arc extinction, and the quick grounding switch is arranged on the other isolating switch and connected with the other insulating sleeve through the bus. The invention uses the auxiliary arc-extinguishing structure to accelerate the diffusion of the arc and improve the arc-extinguishing capability.

Inventors

• XIAO PEIWEI
• JIA ZONGQING
• LI XINING
• SUN LEI
• CONG MENG
• LIU ZENGBAO
• ZHAO KE
• ZHANG JIARUI
• WANG MENG
• YU HONGXU
• WANG GONGSHUAI
• SU WEI

Assignees

• 山东泰开高压开关有限公司
• 国网江苏省电力有限公司
• 国网江苏省电力有限公司电力科学研究院

Dates

Publication Date

20260505

Application Date

20251026

Claims (6)

1. 1. Horizontal environmental protection gas-insulated metal-enclosed switch of supplementary arc extinction of isolated ground area, its characterized in that includes: An insulating sleeve (1) which is provided with two side by side; the circuit breaker (6) is provided with two vacuum arc-extinguishing chambers (62) which are arranged in series, and the vacuum arc-extinguishing chambers (62) are filled with environment-friendly gas; The two isolating switches (4) are arranged in total and comprise electromagnetic field emission structures (43) for assisting arc extinction, the two isolating switches (4) are respectively connected to two ends of the circuit breaker (6) through a current transformer (5), and the grounding switch (3) is arranged on one isolating switch (4) and is connected with one insulating sleeve (1) through a bus (2); The fast grounding switch (7) comprises a permanent magnetic field structure (75) for assisting arc extinction, is arranged on the other isolating switch (4) and is connected with the other insulating sleeve (1) through the bus (2).
2. 2. The horizontal environment-friendly gas-insulated metal-enclosed switch with auxiliary arc extinction by the isolation grounding strap according to claim 1, characterized in that the circuit breaker (6) comprises a tank body, an insulation rod connecting two vacuum arc-extinguishing chambers (62), two parallel capacitors (63) respectively connected in parallel on the two vacuum arc-extinguishing chambers (62), a closing resistor (64) positioned on one side of the vacuum arc-extinguishing chambers (62), an insulation cylinder (65) arranged in the tank body and a hydraulic spring mechanism (61) arranged on one side of the tank body, wherein the insulation rod connects the two vacuum arc-extinguishing chambers (62) and the moving end of the closing resistor (64) into a whole, and the closing resistor (64) is arranged on the insulation cylinder (65).
3. 3. The horizontal environment-friendly gas-insulated metal-enclosed switch with auxiliary arc extinction by means of isolation grounding strap according to claim 1, wherein the isolation switch (4) further comprises a first shell, an insulation pull rod (41) arranged at one end of the inner side of the first shell, a movable contact seat (42) arranged on the insulation pull rod (41) and the first shell, an isolation movable contact (44) arranged on the movable contact seat (42) in a sliding manner and an isolation fixed contact (45) arranged at the other end of the inner side of the first shell, the isolation movable contact (44) faces the isolation fixed contact (45), and the electromagnetic field emission structure (43) is arranged on the periphery of the movable contact seat (42).
4. 4. The horizontal type environment-friendly gas-insulated metal-enclosed switch with auxiliary arc extinction by means of isolated grounding strap according to claim 3, characterized in that the electromagnetic field emission structure (43) comprises a coil wound by permanent magnet or copper strip and an epoxy resin layer wrapped around the periphery of the coil.
5. 5. The horizontal environment-friendly gas-insulated metal-enclosed switch with auxiliary arc extinction by isolated grounding strap according to claim 1, wherein the quick grounding switch (7) further comprises a second shell, a cylinder (72) arranged in the second shell, a piston (71) arranged in the cylinder (72) in a sliding manner, a moving contact (73) arranged on the piston (71) in a penetrating manner, a first shielding (74) arranged at the bottom end of the second shell, a second shielding (77) arranged below the first shielding (74) and a static contact (76) arranged in the second shielding (77), and the permanent magnetic field structure (75) is arranged at the bottom of the first shielding (74).
6. 6. The horizontal, environmentally friendly, gas insulated, metal-enclosed switch with auxiliary arc extinction by means of isolated grounding strap according to claim 5, characterized in that the permanent magnetic field structure (75) comprises a coil wound by permanent magnet or copper strap and an epoxy layer wrapped around the periphery of the coil.

Description

Horizontal environment-friendly gas-insulated metal-enclosed switch with auxiliary arc extinction by isolating grounding zone Technical Field The invention relates to the field of power switches, in particular to a horizontal environment-friendly gas-insulated metal-enclosed switch with an isolated grounding zone for auxiliary arc extinction. Background GIS (Gas Insulated metal-enclosed Switchgear, gas insulated metal enclosed switchgear) is an important control and protection device in power systems, and the primary devices except transformers in substations, such as circuit breakers, disconnectors, grounding switches, voltage/current transformers, lightning arresters, buses, etc., are all sealed in a metal grounding shell filled with sulfur hexafluoride gas. However, for the existing GIS equipment, when current needs to be cut off, the movable contact and the static contact are rapidly separated, and at the moment of separation, a gap between the contacts is broken down to generate an electric arc, so long as the electric arc continuously exists, the circuit is not completely disconnected, and the arc extinguishing capability of the GIS equipment needs to be further improved. Disclosure of Invention Aiming at the problems in the background technology, the invention provides a horizontal environment-friendly gas-insulated metal-enclosed switch with an isolated grounding zone for auxiliary arc extinction, which accelerates the diffusion of an electric arc by utilizing an auxiliary arc extinction structure and improves the arc extinction capability. The technical scheme includes that the horizontal environment-friendly gas-insulated metal-enclosed switch with the auxiliary arc extinction function comprises an insulating sleeve, a bus, a grounding switch, isolating switches, a current transformer, a circuit breaker and a quick grounding switch, wherein the insulating sleeve is arranged in parallel, the circuit breaker is provided with two vacuum arc-extinguishing chambers which are arranged in series, the vacuum arc-extinguishing chambers are filled with environment-friendly gas, the isolating switches are arranged in total and comprise electromagnetic field emission structures for auxiliary arc extinction, the two isolating switches are connected to two ends of the circuit breaker through the current transformer respectively, the grounding switch is arranged on one isolating switch and connected with one insulating sleeve through the bus, the quick grounding switch comprises a permanent magnetic field structure for auxiliary arc extinction, and the quick grounding switch is arranged on the other isolating switch and connected with the other insulating sleeve through the bus. Preferably, the circuit breaker comprises a tank body, an insulating rod connecting the two vacuum arc-extinguishing chambers, two parallel capacitors respectively connected in parallel on the two vacuum arc-extinguishing chambers, a closing resistor positioned on one side of the vacuum arc-extinguishing chambers, an insulating cylinder arranged in the tank body and a hydraulic spring mechanism arranged on one side of the tank body, wherein the insulating rod connects the two vacuum arc-extinguishing chambers and the moving end of the closing resistor into a whole, and the closing resistor is arranged on the insulating cylinder. Preferably, the isolating switch further comprises a first shell, an insulating pull rod arranged at one end of the inner side of the first shell, a movable contact seat arranged on the insulating pull rod and the first shell, an isolating movable contact arranged on the movable contact seat in a sliding manner, and an isolating fixed contact arranged at the other end of the inner side of the first shell, wherein the isolating movable contact faces the isolating fixed contact, and the electromagnetic field emission structure is arranged on the periphery of the movable contact seat. Preferably, the electromagnetic field emission structure includes a coil wound with a permanent magnet or a copper tape, and an epoxy resin layer wrapped around the outer circumference of the coil. Preferably, the quick grounding switch further comprises a second shell, a cylinder arranged in the second shell, a piston arranged in the cylinder in a sliding manner, a moving contact penetrating through the piston, a first shield arranged at the bottom end of the second shell, a second shield arranged below the first shield and a fixed contact arranged in the second shield, and the permanent magnetic field structure is arranged at the bottom of the first shield. Preferably, the permanent magnetic field structure comprises a coil wound by a permanent magnet or copper tape and an epoxy resin layer wrapped around the periphery of the coil. Compared with the prior art, the invention has the beneficial technical effects that the three-phase box-separating structure is integrally adopted, the environment-friendly gas is filled as insulating gas