KYN28-12 Armoured removable metal enclosed switchgear

Description

Product/performance characteristics

Use environment

Ambient air humidity: upper limit +40°C; Lower limit -25°C

♦ The altitude is not more than 1000m

♦ Relative humidity: the daily average is not more than 95%, the monthly average is not more than 90%;

♦ The surrounding air is not polluted by corrosive gases, water vapor, etc.

♦ No frequent severe vibration;

♦ When the normal conditions specified in GB3906 are exceeded, the user and the manufacturer shall negotiate;

Overload capacity/technical parameters

Basic technical parameters of the switch cabinet

project		unit	technical specification
nominal voltage		KV	12
rated current		A	630、1250、1600、2000、2500、3150
rated frequency		HZ	50
rated short time current（4S）		kA	20、25、31.5、40
Rated peak withstand current		kA	50、63、80、100
Rated short-circuit breaking current		kA	20、25、31.5、40
Rated short-circuit closing current		kA	50、63、80、100
rated insulation level	1min power frequency withstand voltage	kV	Phase to phase, ground 42, fracture 48
	Electrical withstand voltage during lightning shock		Phase to phase, ground 75, fracture 85
level of protection		The housing is IP4X, the compartment is IP2X when the breaker room door is open

VSI vacuum circuit breaker technical parameters

project		unit	technical specification
nominal voltage		KV	12
rated frequency		HZ	50
rated current		A	630、1250、1600、2000、2500、3150
Rated short-time withstand current (4S)		kA	20、25、31.5、40
Rated peak withstand current		kA	50、63、80、100
Rated short-circuit breaking current		kA	20、25、31.5、40
Rated short-circuit closing current		kA	50、63、80、100
rated insulation level	1min power frequency withstand voltage	kV	Phase to phase, ground 42, fracture 48
	Electrical withstand voltage during lightning shock		Phase to phase, ground 75, fracture 85
Rated operating sequence			Points -0.3s_ Combined points -180s combined points Minute -180s- Closing -180s- Closing (40kA)
Rated short circuit breaking times		次	50	30
mechanical life		次	20000

VS Mechanical parameters of vacuum circuit breakers

project		unit	numerical value
clearance between open contacts		mm	11±1
overtravel			3.5±1
Interphase center distance			210，275
Closing contact bounce time		ms	≤2
Switching and switching are different			≤2
Switching time when the operating voltage is	max	ms	≤40
			≤50
	min		≤60
closing time		ms	≤70
Average opening speed		m/s	0.9-1.3
Average closing speed		m/s	0.4-0.8

Technical parameters of spring mechanism

project	nominal voltage（V）	rated power（V）	operating voltage range	remark
energy-saving motor	220,110	70,100	85%-110%	Switching diagram Energy storage time ≤10S
Gate diagram		368	85%-110%
Switching diagram		368	85%-120%

Current transformer technical parameters

Rated primary current (A)	KARated short-time withstand current KA	Rated peak withstand current (kA)	（1K，2K）Accuracy level combination (1K, 2K)	Rated secondary output (VA)
Rated primary current (A)	KARated short-time withstand current KA	Rated peak withstand current (kA)	（1K，2K）Accuracy level combination (1K, 2K)	0.2	0.5	10P10	10P15
5	2	5	0.2S/10P 0.2/1OP 0.2S/0.5 0.2/0.5 0.5S/10P 0.5/1OP	10	10	15	10
10	4.5	11
15	6.3	15
20	9.5	23
30	12.6	31.5
40	18	45
50	22	55
75	36	80
100-200	50	90
300-600	72	100
800-1250	80	110

Technical parameters of voltage transformer

Grounding switch technical parameters

project	unit	numerical value
nominal voltage	KV	12
Rated short-time withstand current (4s)	KV	20、25、31.5、40
Rated peak withstand current	KV	50、63、80、100