KYN9-27.5, 2 × 27.5kV armored removable metal-enclosed switchgear
With the continuous development of China's electrified railway, especially high-speed railway, the complexity of engineering construction is gradually increasing, and the requirements for miniaturization, maintenance-free and intelligent switching equipment in traction substation are getting higher and higher. The domestic air-insulated armored metal-enclosed switchgear is large in volume and heavy in weight, which not only covers a large area, but also brings certain difficulties to transportation and installation. At present, GIS products filled with SF6 gas are mainly used. Although the product is small in size, SF6 gas is a restricted greenhouse gas (contrary to environmental protection), and SF6 gas needs to be checked regularly. Structurally, SF6 switch cabinet adopts plug-in bus connector. Once the parts in SF6 gas box fail, the side cabinet can only be repaired after it is removed. The power failure time is relatively long, and the operation and maintenance costs are higher than those of air insulation products. In this context, our company has independently developed a new generation of KYN9-27.5/2 × 27.5kV armored removable metal enclosed switchgear for electrified railways (hereinafter referred to as unipolar/bipolar intermediate cabinet). The volume of this product is larger than GIS products, but much smaller than domestic air insulated products. The supporting isolating switch and circuit breaker adopt integrated design and are installed in the middle removable type. If you want to repair and replace the circuit breaker, you only need to draw out the integrated isolation circuit breaker, and the old and new can be completed in a short time, which greatly saves maintenance cost and time. And the use of air insulation, in line with the requirements of environmental protection. According to user requirements, it can also provide intelligent control, protection, monitoring, measurement, communication and other intelligent requirements of one or two integration. This product has the characteristics of small size, light weight, safety and environmental protection. The main circuit of single-pole and double-pole intermediate cabinets adopts longitudinal arrangement, and the primary components are directly connected from top to bottom, so that the main circuit does not need branch bus transition and other insulation supports, the structure is simple and compact, and the upper and lower isolation fracture states are directly visible. It is a patented product of our company. The circuit breaker pole rotates to the horizontal position as the isolation position, and the circuit breaker pole rotates to the vertical position as the closed position. In the closed position, the upper contact of the pole is directly inserted into the contact box and the horizontal main bus, and an observation window is reserved on the contact box. The user can observe the insertion of the contact in the contact box through the observation window. At the same time, the working state of the isolation plug connector can also be directly observed from the lower door and the right observation window.
- Product Description
- Technical features
- Main technical parameters
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- Commodity name: KYN9-27.5, 2 × 27.5kV armored removable metal-enclosed switchgear
With the continuous development of China's electrified railway, especially high-speed railway, the complexity of engineering construction is gradually increasing, and the requirements for miniaturization, maintenance-free and intelligent switching equipment in traction substation are getting higher and higher. The domestic air-insulated armored metal-enclosed switchgear is large in volume and heavy in weight, which not only covers a large area, but also brings certain difficulties to transportation and installation. At present, GIS products filled with SF6 gas are mainly used. Although the product is small in size, SF6 gas is a restricted greenhouse gas (contrary to environmental protection), and SF6 gas needs to be checked regularly. Structurally, SF6 switch cabinet adopts plug-in bus connector. Once the parts in SF6 gas box fail, the side cabinet can only be repaired after it is removed. The power failure time is relatively long, and the operation and maintenance costs are higher than those of air insulation products. In this context, our company has independently developed a new generation of KYN9-27.5/2 × 27.5kV armored removable metal enclosed switchgear for electrified railways (hereinafter referred to as unipolar/bipolar intermediate cabinet). The volume of this product is larger than GIS products, but much smaller than domestic air insulated products. The supporting isolating switch and circuit breaker adopt integrated design and are installed in the middle removable type. If you want to repair and replace the circuit breaker, you only need to draw out the integrated isolation circuit breaker, and the old and new can be completed in a short time, which greatly saves maintenance cost and time. And the use of air insulation, in line with the requirements of environmental protection. According to user requirements, it can also provide intelligent control, protection, monitoring, measurement, communication and other intelligent requirements of one or two integration. This product has the characteristics of small size, light weight, safety and environmental protection. The main circuit of single-pole and double-pole intermediate cabinets adopts longitudinal arrangement, and the primary components are directly connected from top to bottom, so that the main circuit does not need branch bus transition and other insulation supports, the structure is simple and compact, and the upper and lower isolation fracture states are directly visible. It is a patented product of our company. The circuit breaker pole rotates to the horizontal position as the isolation position, and the circuit breaker pole rotates to the vertical position as the closed position. In the closed position, the upper contact of the pole is directly inserted into the contact box and the horizontal main bus, and an observation window is reserved on the contact box. The user can observe the insertion of the contact in the contact box through the observation window. At the same time, the working state of the isolation plug connector can also be directly observed from the lower door and the right observation window.
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- Function compound, convenient operation and maintenance
The main switch ZRN rotary isolation vacuum circuit breaker for electrified railway is a functional composite circuit breaker integrating vacuum circuit breaker, isolating switch and mechanism, and interlocking. It organically combines the three functions of breaking, isolation and interlocking. Due to the longitudinal arrangement and the integrated design of isolation and circuit breaker, unlike the traditional removable circuit breaker, there is no need to swing in and out of the floor type chassis car, the central type is used to push in and pull out, the positioning pin is inserted in front of the rear cabinet after being pushed in place, the mechanism does not move the pole to rotate 90 °, the pole rotates to the vertical position, and the rear end toggle device moves the valve of the contact box horizontally to complete isolation closing, and the circuit breaker can be closed. On the contrary, when the circuit breaker opens and the pole rotates to the horizontal position, the rear end toggle device will close the contact box mouth by moving the valve of the contact box horizontally, pull out the positioning pin, and the isolation-circuit breaker can be pulled out of the cabinet. Isolation-circuit breaker operation, transfer, maintenance, etc. are very convenient.
- Air insulation, safe and reliable
The unique structure design is adopted, the upper and lower isolating switches are omitted, the pole of the circuit breaker rotates, the function of the isolating switch is realized, and the miniaturization of air insulation is achieved. It subverts the traditional method of using insulation coating in order to achieve miniaturization, or the extensive use of organic insulating material partitions in the cabinet. The shielding valve of the new contact box is also metal, which meets the requirements of metal armor spacing.
- Simple circuit, less heat source
The main circuit consists of a longitudinal horizontal main bus, which is connected with the upper end of the pole of the longitudinal spin isolation-vacuum circuit breaker, and the lower end of the pole of the longitudinal spin isolation-vacuum circuit breaker is connected with the combined current transformer. The entire loop is vertically interconnected from top to bottom, and there is no transition branch bus and insulating support between the components. The conductive path is short, which effectively reduces the source of temperature rise.
- Obvious double isolation fracture
Isolation-the rotation of the circuit breaker can be operated manually or electrically. The operator can directly observe the whole process of the insertion and separation of the isolation moving and static contacts through the observation window, and can grasp the isolation state of the circuit breaker in real time.
- miniaturization
The shape of the unipolar switch cabinet is 1200 (wide) X1200 (deep) X2300 (high), and the shape of the bipolar switch cabinet is 1200 (wide) X1900 (deep) X2300 (high), which is smaller than other cabinet types of the same kind, while ensuring the insulation distance. There are schemes such as inlet (outlet) line on the top of the cabinet and continuous row on the bottom of the cabinet, which are convenient for users to choose.
- Intelligent
Longitudinal spin isolation-vacuum circuit breaker can be remotely operated to facilitate rapid isolation of faulty lines and rapid recovery of non-faulty lines. At the same time, with real-time
The functions of online temperature rise monitoring and condition monitoring meet the requirements of unattended substations and smart grids. -
4. Basic Parameter Table of 4.1KYN9-27 5/2X27.5kV Double (Single) Pole Intermediate Cabinet Serial Number Project Unit Parameters 1 Rated voltage kV 27. 5/2 × 27. 5 2 Rated frequency Hz 50 3 Rated insulation level Imin power frequency withstand voltage (effective value) kV Interphase, relatively Isolation fracture 95 118 Lightning impulse withstand voltage (peak) 200 220 Auxiliary control circuit InIin power frequency withstand voltage V 2000 4 Rated current of main bus A 1250, 1600, 2000, 2500 5 Rated current of branch bus A 1250, 1600, 2000, 2500 6 Rated short-circuit breaking current kA 25, 31.5 7 Rated short-circuit closing current (peak) 63, 80 8 Rated short-time withstand current (4S) 25, 31.5 9 Rated peak withstand current 63, 80 10 Rated voltage of auxiliary control circuit V DCl10/220, AC220 11 Protection level Enclosure IP4X compartment, IP2X when circuit breaker door is open 12 Loss of operation continuity level LSC2B 13 IAC Level BFLR, 31.5kA, 1s, 14 Overall dimension of single-pole intermediate cabinet (W X D X E) mm 1200X1200× 2300 15 Overall dimension of bipolar intermediate cabinet (width x depth x height) 1200X1900 × 2300 16 Total kg 1500/1800 Main Technical Parameters of Rotary Isolation Vacuum Circuit Breaker for 4.2 Electrified Railway Serial Number Project Name Unit Parameter Value 1 Rated voltage kV 27.5 2 × 27.5 2 Rated frequency Hz 50 3 Rated current A 630、1250、1600、2000、2500 4 Rated insulation level Imin power frequency withstand voltage extremely to the ground kV 95 Interpolar kV / 140 Isolation fracture kV 118 Lightning impulse withstand voltage extremely to the ground kV 200 Interpolar kV / 325 Isolation fracture KV 220 5 Auxiliary circuit InIin power frequency withstand voltage kV 2 6 Rated short-circuit breaking current kA 20、25、31.5 7 Rated short-circuit closing current kA 50、63、80 8 Rated short-time withstand current kA 20、25、31.5 9 Rated peak withstand current kA 50、63、80 10 Rated short-circuit breaking times Times 30(E2) 11 Rated short circuit duration S 4 12 Rated operating sequence Points -0. 3s *-combined points-18OS-combined points 13 Rated cable charging breaking current A 50 14 Rated breaking current of single capacitor bank A 400 15 Capacitive current opening and closing performance Level C2 16 Mechanical life Breaker opening and closing operation Times 10000 (M2) Rotary isolation operation Times 5000 17 Rated power supply voltage of operating mechanism V AC/DC 220 18 Rated supply voltage of auxiliary circuit V AC/DC 220
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