KYN28A-12 Metal-clad Switchgear

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KYN28A-12

The KYN28A-12 metal-clad switchgear is a kind of draw out metal-enclosed switch cabinet for indoor use, and it suits for 3-10kV, 3-phase, 50Hz single busbar and busbar sections. This high voltage switchgear is primarily utilized for three purposes as listed below.
1. Power distribution for enterprises, mining plants and manufacturing plants
2. Power receiving and distribution for secondary power substations
3. Start up of large-sized, high-voltage motor, etc.

Standard
IEC62271-2003 high voltage switchgear and control gear

Operating Condition
1. Ambient temperature: -5℃~ 40℃
2. Max. altitude of installation site: 1000m
3. Average daily relative humidity: ≤95%
4. Average monthly relative humidity: ≤90%
5. Seismic intensity: Not over Class VIII as demonstrated by the Modified Mercalli Intensity Scale
6. Surrounding air: Without vapor, corrosive gas, flammable gas or other pollution gas
7. Working environment: There should be no serious filthy matters or frequent vibration (Hazardous Zone I).

Special Operating Condition
When our metal-clad switchgear is required to work under more severe operating conditions than ones listed above and regulated in IEC62271-2003, users should negotiate with us.

Technical Parameters

Rated Insulation Level	Item	Unit	Data
	Rated voltage	kV	3.6, 7.2, 12
	Rated frequency	Hz	50
	Rated short-duration (1min) power-frequency withstand voltage	kV	42
	Rated lightning impulse withstand voltage	kV	75
	Rated normal current for main busbar	A	630, 1250, 1600, 2000, 2500, 3150
	Rated normal current for branch busbar	A	630, 1250, 1600, 2000, 2500, 3150
	Rated short-time withstand current (tk=4s)	kA	16, 20, 25, 31.5, 40, 50
	Rated peak withstand current	kA	40, 50, 63, 80, 100, 125
	IP Grade	IP4X: When the door of circuit breaker is closed, wires and other objects with diameter/thickness of 1.0mm or more cannot penetrate into our metal-clad switchgear.IP2X: When the door is open, solid objects whose diameter is over 12mm as well as fingers and similar objects whose length is not over 80mm cannot penetrate into this power distribution cabinet.

Design and Structure
The metal-clad switchgear shall be designed strictly following the requirements for indoor AC metal-clad withdrawable switchgear as regulated in IEC62271-2003 standard, and it should avoid:
1. Pull or push circuit breaker under on-load conditions
2. Misoperation of circuit breaker
3. Operation of circuit breaker when earthing switch is closed
4. Close of earthing switch by mistake when on-load
5. Unauthorized access to the electrified compartment

Dimension and Weight

Height (mm)	-	2300
Width (mm)	The rated current of branch busbar is lower than 1250A, and the rated short-time withstand current is 40kA.	800
Width (mm)	The rated current of branch busbar is 1600A or higher.	1000
Depth (mm)	Cable incoming and outgoing line	1500
Depth (mm)	Overhead line incoming and outgoing line	1660
Weight (kg)		700~1200

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