Product overview:
KYN28A-12 armored removable metal closed switchgear is suitable for 3.6-12kV three-phase AC 50Hz power grid, which is used for receiving and distributing electric energy, as well as for controlling, monitoring and protecting the circuit. It can be used in .single bus, single bus section system or double bus system. The switchgear meet IEC-60298 A.C. metal-enclosed switchgear and controlgear for rated voltages above 1 kV and up to and including 52 kV, IEC694 Common Clauses For High-Voltage Switchgear And Controlgear Standards, GB3906 GB3906-2006 Alternating-current metal-enclosed switchgear and controlgear for rated voltage above 3.6kV and up to and including 40.5kV, DL 404 Ordering condition for indoor AC high-voltage switchgear, German DIN. VDE 0670 A.C. switchgear and controlgear for voltages above 1 kV; high-voltage a.c. circuit-breakers; type tests and routine tests. It also has a perfect and reliable anti-misoperation function.
Model and meaning:

①Armored Removable AC Metal-enclosed Switchgear
②Removable
③Service condition:(indoor)
④Design No.
⑤Rated voltage(kV)
⑥Primary solution number
⑦Operating mechanism feature code, D: electromagnetism; T: spring
⑧Rated current(A)
⑨Rated short circuit breaking current(kA)
Main feature:
◇ KYN28A-12 armored shift type AC metal closed switchgear (hereinafter referred to as switchgear) is a new product of our company. It can replace various old metal enclosed switchgears, such as KYN1-12, KYN2-12 and other series products. The product has the following obvious advantages:
◇ The enclosure of the product is completely bolt assembly with high mechanical strength, which effectively ensures that the product is neat and beautiful, the cabinet door is sprayed with plastic coating, with strong impact resistance and corrosion resistance ability.The protection level of enclosure is IP4X ( it can be changed to iron plate according to customer needs).
◇ The switch of this product can be equipped with VD4 vacuum circuit breaker produced by ABB company and C3 series fixed load switch, and also can be equipped with a variety of domestic series vacuum circuit breakers (such as VS1, VH1, VK, Zn28),which can replace the similar foreign products.
◇ No matter what type of circuit breaker is selected, the bare conductor air insulation distance can be guaranteed to be greater,than 125mm and the composite insulation can be greater than 60mm.ts circuit breakers have the unique advantages of long life,less maintenance and small size.
Service condition:
◇Ambient air temperature: upper limit +40°C，lower limit -10°C;
◇ Relative humidity: daily mean not more than 95%, monthly mean not more than 90%;Altitude: 1000m and below;
◇Earthquake intensity: not more than 8 degrees;
◇In place of no fire or explosion risk, no serious pollution, no chemical corrosion and no violent vibration. For use in excess of the normal environmental conditions specified in GB3906, it should be negotiated between the user and the manufacturer.
Switch cabinet structural:
The switchgear is designed according to the metal-enclosed switchgear in GB3906-91. See Figure 1 for the structure description of the switch cabinet: the switch cabinet is composed of fixed cabinet body and withdrawable parts (referred to as handcart).The enclosure of the cabinet and the partition plate of each functional unit are connected by bolts. The protection level of the switchgear enclosure is IP4X, and the protection level of the breaker room door is IP2X when the door is open. The switch cabinet can be equipped with vacuum breaker handcart or fixed load switch. It has overhead incoming (outgoing) line, cable outlet and other functional solution. The switchgear can be arranged in double cabinets, namely, back-to-back or face-to-face double row arrangement.
Technical parameter:
Switchgear technical parameter

Installation of switchgear:
a. Transfer the switchgear to a specific location according to engineering requirements and drawings. If there is a long row of switchgear (e.g, more than 10 switchgears), the consolidation work should start from the middle position.
b. Use specific means of transport such as cranes or forklifts. Roller crowbars are strictly prohibited.
C. Take out the circuit breaker handcart from the switchgear and store it elsewhere for safekeeping.
d. Loosen the retaining bolts in front of the bus compartment and remove the vertical partition plate 9.
e. Loosen the retaining bolts of horizontal partition plate 19 under the breaker compartment and remove the horizontal partition.
f. Loosen and remove base plate 16.
g. Remove cover plates 1 and 2 from the control line slot on the left side of the switchgear.Remove the cover plate of the right front control line groove at the same time.
h. Install the switchgear one by one on the basis, including the horizontal and vertical aspects, and the installation iregularity of the switchgear shall not exceed 2mm.
I. When the switchgear is completely combined (spliced), it can be connected to the base channel steel with foundation screws or welded firmly with the base channel steel by electric welding.
Switch cabinet outline size:

Ordering instruction:
Please specifty when ordering:
◇ Main circuit solution number, purpose, single line system diagram, arrangement diagram and distribution room layout diagram;
◇ Requirements for control, measurement and protection functions of switchgear and other latching and automatic devices;
◇ Type, specification and quantity of electrical components in the switchgear;
◇ If bus tray connection is needed between switchgear or incoming line cabinet, specific data such as rated carrying capacity of bus tray, span of bus tray and height from ground shall be provided;
◇ Switchgear used in special environmental conditions should be detailed when ordering.
◇ Other special requirements.