KYN28-12 AC Metal-clad Withdrawable Switchgear
KYN28-12 AC Metal-clad Withdrawable Switchgear is used for the indoor complete power distribution device with AC frequency of 50Hz, rated voltage of 3.6~12kV and rated current of 630~4000A. It is used for the power plants, transformer substations and industrial and mining enterprises to receive and distribute the electrical energy. It controls the circuit, protects and detects function, and can also be used to control the place with frequent operation.
Item Unit Data Rated Voltage KV 12 Rated Insulation Level 1min Industrial Frequency Withstand Voltage Value (effective value) KV 24, 32, 42 Lightning Impulse Withstand Voltage (peak value) KV 40, 60, 75 Rated Frequency Hz 50 Rated Current of the Main Bus A 630, 1250, 1600, 2000, 2500, 3150, 4000 Rated Current of the Branch Bus A 630, 1250, 1600, 2000, 2500, 3150, 4000* Rated Short-time Withstand Current (4s) KA 16, 20, 25, 31.5, 40** Rated Peak Withstand Current (peak value) *** KA 40, 50, 63, 80, 100 Rated Short-circuit Breaking Current KA 16, 20, 25, 31.5, 40 Rated Short-circuit Making Current KA 40, 50, 63, 80, 100 Protection Level The housing is IP4X, and is IP2X when the compartment and circuit breaker chamber are opened Weight Kg 700~1200 The ventilation device shall be equipped ** 3s for 40kA *** The short-circuit capacity of the mutual inductor for the instrument shall be considerted independently
High and Low Cabinet Type
Height (mm) 2300 Width (mm) Rated current of the branch small bus to 1250A 800 Rated current of branch small bus to 1600A and above 1000 Depth (mm) Incoming and outgoing line of the cable 1500 Overhead incoming and outgoing line 1660 Flat Top Cabinet Model
Height (mm) 2300 Width (mm) Rated current of the branch small bus to 1250A 800 Rated current of branch small bus to 1600A and above 1000 Depth (mm) Cable incoming and outgoing line and overhead incoming and outgoing line 1350 Rated current of 4000A and above 1500, 1660 I.Structural Features:
The switchgear is designed according to the standard of metal-clad metal-enclosed switchgear in GB3906, and consists of the cabinet and mid-set withdrawable part (handcart). The switchgear is separated into the circuit breaker chamber, main bus chamber, cable chamber and relay instrument chamber. All metal structures are reliably grounded, various compartments of the main circuit system have the independent pressure release channel, and 10x60 mm2 grounding bus can be arranged in the cable chamber.
II.Main Characteristics:
The aluminum-coated steel plate or the galvanized plate is adopted for the cabinet, which is processed with the numerical control machine tools. The multiple folding process is adopted, and it is assembled through bolted connection. Electrostatic spraying is adopted for the cabinet door, the surface has a higher impact resistance and corrosion resistance as well as a very high mechanical strength, which effectively guarantees accurate and artistic outline:
(1) Simple and effective 'five prevention' locking, preventing misoperation;
(2) It can be equipped with ZN63A (VS1), VD4, ZN21, 3AH, VB2 and VEP vacuum circuit breakers, VC7 vacuum contactor, load switch, isolating switch, etc;
(3) It can be equipped with the voltage transformer handcart, measuring handcart, isolating handcart, landing handcart for station transformer,etc, and the handcarts of the same purpose are of interchangeability;
(4) The cabinet can be installed against the wall, and maintenance in front of the cabinet can be conducted, so as to reduce the floor area;
(5) The circuit breaker chamber and the cable chamber can be installed with the heater respectively, so as to prevent condensation and corrosion;
(6) The space of the cable chamber is sufficient, and multiple cables can be connected.
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