The LW3-12/630-20 inteligent outdoor high-voltage SF₆column mounted circuit breaker is a new generation product developed by our company in response to the new requirements of the State Grid for the integration of primary and secondary column mounted switches.The switch configuration fully meets the requirements of the State Grid for the integration of primary and secondary columns,making it easy forthe State Grid to purchase and produce in bulk.The switch structure is compact,the layout is reasonable,the functions are complete,and all indicators meet the requirements of the first and second integration of the State Grid;Adopting a unified parameter protection CT,zero sequence CT,and zero sequence voltage sensor,it has the characteristics of wide measurement range,high measurement accuracy,and high reliabity.The analog quantity is complete,making it easy to accurately determinevarious faults in the circuit.It is an idealswitch equipment for achieving “distribution network automation”,with the ability to open and close load currents,overload currents,and short-circuit currents. Product Features It has significant advantages such as simple structure,good arc extinguishing and insulation performance,low operating power, high rated parameters,long electrical life and no maintenance cycle (20 years); The shell s made of stainless steel,which meets the corrosion resistance requirements for permanent use; An explosion-proof pressure relief device has been added to prevent the circuit breaker from burstingdue to increased pressure caused by internal arc faults in the switch; Choosing insulated terminals for incoming and outgoing terminals can effectively avoid phase to phase flashover faults caused by external factors; Equipped with a low-pressure locking device,thegas pressure is ina dual control state,improving the reliabity of switchoperation; Changing the end sleeves of the incoming and outgoing lines to organic insulator type completely eliminates porcelain botte breakage caused by external forces and lightning,as well as cracking caused by porcelain quality factors,greaty improving the reliability ofcircuit breakeroperation; Equipped with a manual locking device,it effectively prevents misoperation during power outageoperations; Increasing the inter phase distance of the switch to 250mm can greatly reduce inter phase flashover and short circuit faults; Improved the process of inlet and outlet conduit,effectively preventing phase to phase flashover faults caused by corona discharge during switch operation; A surge current controller can be installed to effectively shield the closing surge current,and it is convenient to set the overcurrent delay and overcurrent flow rate protection. Equipped with an automatic controller that can be manually operated.It can also be operated locally,remotely,or through the FTU interface for console operation. The use of this product not only reduces land area,reduces engineering costs,and eliminates fire hazards,but alsoimproves its functional characteristics,anti-corrosion performance,and greatly enhances the operational reliability of the power system. Technical Parameter

No.	Project		Unit	Technical parameter
1	Rated voltage		kV	12
2	Rated insulation level (when the circuit breaker is filled with SF₆ gas at 0.25MPa and 20℃)	Lightning impulse withstand voltage full wave	kV	75
		1min power frequency withstand voltage		42
		Rain withstand voltage test		34
		Reverse phase impulse withstand voltage		85
3	Insulation level at zero gauge pressure	1min power frequency withstand voltage	kV	30
		1min reverse phase withstand voltage		30
		Maximum phase voltage for five minutes		9
4	Rated current		A	400、630
5	Rated short-circuit breaking current (at 0.25MPa and 20℃)		kA	16	20
6	Phase to phase grounding reclosing breaking current		kA	14	17.4
7	Breaking current at zero gauge pressure		A	400、630
8	Rated operating sequence	Type l		O-180s-CO-180s-CO
		Type ll		O-0.3s-CO-180s-CO
9	Rated short-circuit making current (peak)		kA	40	50
10	Rated withstand current (peak)		kA	40	50
11	Rated short-term withstand current		kA	16	20
12	Rated short-circuit duration		S	4
13	Rated cable charging breaking current		A	25
14	Rated line charging breaking current		A	16
15	Righteous closing speed		m/s	2.0±0.2
16	Rigid velocity		m/s	3.6±0.2
17	Distance between moving and stationary contacts		mm	37±2
18	Total stroke of conductive rod		mm	58±2
19	Conducting rod overtravel		mm	22±2
20	Three phase synchronization of opening and closing		mm	≤2
21	Resistance of each phase main circuit		μΩ	≤130
22	Rated working pressure		MPa	0.35(20℃)
23	Minimum working pressure		MPa	0.25(20℃)
24	Annual air leakage rate		%	<0.05
25	Mechanical stability operation		Times	10000
26	SF₆gas moisture content		PPM	≤150
27	Weight		kg	150

Environmental Conditions Ordering Notice Please determine the product model,name,quantity,rated current,breaking current,CT ratio and accuracy,as well as the category and operating power ofthe operating powersupply asneeded. According to user requirements,we can provide: Special fixtures for busbar connection; Circuit breaker suspension mounting bracket; Circuit breaker mounting bracket.