Fn12-Air-Compressing Switchgear for Indoor Use with Fuse Combination Unit

Model NO.: FN12-12RD/125-31.5 Usage: Control Switch Number of Switch: Multi Control Switch Arc-Extinguishing Principle: Air-Compresing Type: Indoor High Voltage Trademark: YF Function: Industry, Circuit-Breaker Failure Protection Pole: 3 Certification: SGS, ISO9001, CE Test Equipment: IEC Standard Operation Model: Manual or Electric Operation Origin: Jiangyin Yunfeng, China Product Overview
YFN12(FN12)-12 series indoor AC HV load switch works under the air-compressing arc extinction principle. Because of its unique structural design, it can make full use of the air-compression extinguishing arc generated in the tripping process of switch. Its performance meeets the requirements of national standards GB 3804-2004 High-voltage alternating-current switches for rated voltage above 3.6kV and less than 40.5kV and GB 16926-2009 High-voltage alternating current switch-Fuse combinations.It is applied in the HV AC 12kV network with the frequency of 50HZ for opening, closing the load current, overload current and making the short-circuit current. Together with the HV current-limiting fuse and trip device, it combines YFN12-12R series indoor AC HV load switch-fuse combination unit, which can reliably disconnect the 
rated short-circuit current.

 

Model Specification


Characteristics:
          ---small size
          ---light weight
          ---simple & reasonable structure
          ---small operating force
          ---reliable performance & convenient maintenance

Service Conditions
          1.Altitude≤1000m;
          2.Ambient temperature-25ºC-+ 40ºC;
          3.The daily average of relative humidity shall not be larger than 95% and the monthly average shall not be               larger than 90%:
          4.The ambient air shall not be subject to the obvious pollution such as corrosive or combustible gas and                   steam;
          5.The site without fire hazards and explosion hazards;
          6.The site that the seismic intensity does not exceed degree 8; the gradient shall not exceed 5°



Main Technical Parameters

Serial No.	Item	Unit	YFN12-12R HV Load Switch-Fuse Combination Unit
1	Rated voltage	KV	12
2	Rated frequency	Hz	50
3	Rated current	A	Max.rated current of fuse equipped:125A
4	Rated short-circuit breaking current of fuse	kA	31.5; 40; 50
5	Rated breaking-transfer(handover) current	A	1700
6	Rated active load breaking current	A	630
7	5% rated active load breaking current	A	31.5
8	Rated closed loop breaking current	A	630
9	Rated cable charging breaking current	A	10
10	Rated short-time withstand current       ---Load switch	kA/s	20/3
	(thermal stability current)/duration        ---Earthing switch	kA/s	16/2
11	Rated short-circuit making current	kA	50
12	Rated peak withstand current(dynamic stability current)	kA	50
13	1min power-frequency withstand voltage(effective value) to earth, phase-to-phase/isloating fracture	kV/kV	42/48
14	Full-wave lightning impulse withstand voltage(peak)to earth,phase-to-phase/isolating fracture	kV/kV	75/85
15	Main loop resistance	μΩ	≤120
16	Mechnical life	Time	2000
17	Three-phase opening and closing asynchronization	ms	≤5
18	Inter-pole center distance	mm	210±5
19	Distance between live parts and of phase to earth	mm	≥140
20	Opening closing operation torque of load switch	N·m	≤80
21	Opening closing operation torque of earth switch	N·m	≤35
22	Rated closing operation voltage	V	≌220/110
23	Rated opening operation voltage	V	≌220/110
24	Time of switch opening triggered by breaking of fuse	ms	35±5
25	Impact output energy at breaking of fuse	J(Joule)	1

     



 

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Product Categories : 12kV Indoor HV load switch