High Voltage Withdrawable Switchgear KYN28A-12/24KV
Short Description:
KYN28A air-insulated metal-clad withdrawable switchgear (hereinafter as “switchgear”) is a necessary indoor power distribution equipment 3-phase AC 50/60Hz. It is mainly used to receive and distribute 7.2~24kV network electrical and control protection and monitoring to line circuit.
Product details
Product Overview
KYN28A-12 indoor AC metal armored mid mounted switchgear. It is suitable for three-phase AC power systems with a rated voltage of 12kV and a rated frequency of 50Hz. It is used to receive and distribute electrical energy, and to control, protect, and monitor circuits.
Compliant with standards:
GB3906-2006 3.6-40.5kV AC Metal Enclosed Switchgear and Control Equipment
GB11022-89 General Technical Conditions for High Voltage Switchgear
IEC298 (1990) "AC metal enclosed switchgear and control equipme nt for rated voltages above 1kV and below 50kV"
DL404-97 Technical Conditions for Ordering Indoor AC High Voltage Switchgear
Function and Characteristics
The switchgear is designed according to the armored metal enclosed switchgear in GB3906-91. The whole is composed of two main parts: a cabinet and a central withdrawable component (i.e. a handcart) (see figure). The cabinet is divided into four separate compartments, with an enclosure protection level of IP4X. When the doors of each compartment and circuit breaker room are opened, the protection level is IP2X. A complete distribution system device is formed by arranging and combining overhead incoming and outgoing lines, cable incoming and outgoing lines, and other functional schemes. This switchgear can be installed, debugged, and maintained from the front, so it can be back-to-back, arranged in a double arrangement, and installed against the wall, improving the safety, flexibility, and reducing the footprint of the switchgear .
◇ Shell and others
The main cabinet frame of the switchgear is made of aluminum zinc coated thin steel plate, processed by CNC machine tool, and adopts multiple folding process, which not only has the advantages of high precision, strong corrosion resistance and oxidation resistance, but also makes the cabinet lighter in weight, higher in mechanical strength, and more aesthetically pleasing than other similar equipment cabinets due to the use of multiple folding process. The cabinet adopts an assembled structure, connected by rivet nuts and high-strength bolts, which shortens the processing cycle, enhances the universality of components, occupies less space, and facilitates production organization.
◇ Handcart
The handcart frame is assembled from thin steel plates processed by CNC machine tools. The handcart and cabinet are insulated and coordinated, and the interlocking mechanism is safe, reliable, and flexible. According to their usage, handcart can be divided into circuit breaker handcart, voltage transformer handcart, metering handcart, isolation handcart, and so on. Various types of handcrafts vary in modular and block style, and handcr afts of the same specification can be freely exchanged 100%. The handcart has a disconnection position, a testing position, and a working position inside the cabinet. Each position is equipped with a positioning device to ensure reliable interlocking. It must be operated according to the interlocking anti misoperation procedure. All handcart uses nuts and screws to move forward and backward, making it easy and flexible to operate, suitable for on duty personnel. When the handcart needs to be moved away from the cabinet, a dedicated transfer vehicle can be used to easily remove it for various inspections and maintenance; And it adopts a mid mounted design, with a small volume for easy inspection and maintenance.
