KGA-11 series environmentally friendly gas insulated ring main unit

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KGA series environmentally friendly gas-insulated AC metal-enclosed switchgear and control equipment (hereinafter referred to as KGA series switchgear) is an environmentally friendly gas-insulated medium-voltage switchgear independently developed by Moju Company. It has the characteristics of green environmental protection, reliable operation, safety assurance, compact structure design, small footprint, maintenance-free, long life, and strong environmental adaptability.

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Product Details

Description

KGA series switchgear is a fully sealed system, with all its primary components, live components, and switches enclosed in a stainless steel housing, free from environmental impact. The modular design of the product can be arbitrarily arranged according to different design schemes to achieve a combination of common box and expansion units, meeting the needs of compact switchgear for famous secondary transmission and distribution substations.

KGA series switchgear has passed the type test of the national high-voltage electrical testing center, and can be widely used in small secondary distribution power stations, box-type switching stations, industrial and mining enterprises, airports, railways, commercial areas, high-rise buildings, highways, subways, tunnels, and natural conditions.

Execution standards

GB/T 311.1 Insulation coordination, Part 1: Definitions, principles and rules

GB/T 1984 High voltage AC circuit breaker

GB/T 1985 High voltage AC disconnector and earthing switch

GB/T 3804 3.6kV~ 40.5kV high voltage AC load switch

GB/T 3906 3.6kV~ 40.5kV AC metal-enclosed switchgear and control equipment

GB/T 4208 Enclosure protection class (IP code)

GB/T 11022 Common technical requirements for high-voltage switchgear and control equipment standards

DL/T 404 3.6kV~ 40.5kV AC metal-enclosed switchgear and control equipment

DL/T 402 High Voltage AC Circuit Breaker

DL/T 593 Common technical requirements for high voltage switchgear and control equipment standards

11kV Ring Network Cabinet (Box) Standardized Design Customized Scheme (2023 Edition)

KGA-11 environmental protection cabinet technical parameter table

serial number	project			unit	Load switch unit	Combined electrical apparatus unit	Circuit breaker unit
1	Rated voltage			kV	11	11	11
2	Rated frequency			Hz	50	50	50
3	Rated current			A	630	125 (depending on the fuse)	630
4	Rated Insulation Level	1min Power Frequency Withstand Voltage	Interphase, to ground	kV	42	42	42
			fracture surface	kV	48	48	48
			Control and auxiliary circuits	kV	2	2	2
		Lightning impulse withstand voltage	Interphase, to ground	kV	75	75	75
		Lightning impulse withstand voltage	fracture surface	kV	85	85	85
5	Rated short-time withstand current			kA/s	20/4		20/4
6	Rated peak withstand current			kA	50	— —	50
7	Rated short - circuit breaking current			kA	——	Limited by high-voltage fuses	20
8	Rated short - circuit making current			kA	50	Limited by high-voltage fuses	50
9	Rated active load breaking current			A	630	——	——
10	Rated closed-loop breaking current			A	630	——	——
11	Rated operating sequence			/	——	——	O-0.3s-CO-180s-CO
12	Mechanical life		Load switch/Circuit breaker	times	10000	10000	10000
12	Mechanical life		Isolation/Grounding Switch	times	3000	3000	3000
13	Loop resistance			μΩ	≤150	———	≤150
14	Rated inflation pressure (gauge pressure at 20℃)			MPa	0.02
15	Annual relative gas leakage rate			year	≤0.01%
16	Insulating gas			/	N2/Dry air
17	Protection level		Compartment (IP code)	/	IP2XC
			Gas tank (IP code)	/	IP67
			Cabinet (IP code)	/	IP41
			Cabinet (IK code)	/	IK10
18	Arc ignition test (Fault current / Duration)			kA/s	20/1

Overall dimensions table

Type		Width (W)	Height (H)	Depth (D)
C	Top expansion	420mm	1950mm	850mm
	Lateral expansion	420mm	2000mm
V	Top expansion	420mm	1950mm
	Lateral expansion	420mm	2000mm
PT	Top expansion	600mm	1950mm
	Lateral expansion	600mm	2000mm
D	Top expansion	420mm	1950mm
	Lateral expansion	420mm	2000mm

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