Fuse Combination Unit Hv Switchgear with Earthing Switch

Model NO.: YFZRN25-12D/T125-31.5 Usage: Control Switch Number of Switch: Multi Control Switch Environment: Indoor High Voltage Application: Power Distribution System of Ring Net Wiring Arc-Extinguishing Principle: Vacuum Origin: Jiangyin Yunfeng, China Function: Industry, Control&Protection Device Pole: 3 Certification: SGS, ISO9001, CE Test Equipment: IEC Standard Speed: High-Speed Circuit breaker Trademark: YF Product Overview
YFZN25(FZN25)-12 indoor AC HV vacuum load switch and load switch-Fuse combination unit ("combination unit")is a control and protection device for three-phase AC 50Hz, 12kV power distribution system and widely applied at the site such as industrial and mining enterprises and power distribution substations of urban buildings. It is particularly applicable for the power distribution system of ring net wiring. The Operation Mechanism can be manual and electric, so that the "three remote control" requirements of power system can be realized. Its performance meets requirements of 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.

Model Specification


         

Characteristics:
         ---compact structure
         ---long electrical endurance
         ---availability for frequent operation
         ---basically no maintenance
         ---strong breaking and making capacity
         ---safety, reliability and obvious isloating fracture

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 Paramenters

Serial No.	Item	Unit	YFZRN25-12 Load Switch-Fuse Combination Unit
1	Rated voltage	kV	12
2	Rated frequency	Hz	50
3	Rated current	A	Max.rated current of fuse 125A;
4	Rated short-circuit breaking current of fuse	kA	31.5;
5	Rated breaking-transfer(handover)current	A	2000
6	Rated active load breaking current	A	630
7	Rated closed loop breaking current	A	630
8	Rated cable charging breaking current	A	10
9	Rated breaking no-load Transformer capacity	kVA	1600
10	Rated short-time withstand current(thermal stability current) ,load switch(including disconnector)	kA/s	20/4
11	Rated short-circuit making current	kA	50
12	Rated peak withstand current(dynamic stability current)	kA	50
13	1 min power-frequency withstand voltage(effective value)to earth,phase-to-phase /isolating fracture	kV/kV	42/48(vacuum arc-extinguishing chamber)
14	Full-wave lightning impluse withstand voltage(peak) to earth,phase-to-phase /isolating fracture	kV/kV	75/85
15	Main loop resistance	μΩ	≤150
16	Mechanical life	Time	10000
17	Clearance between open contacts	mm
18	Overtravel(compression length of contact spring)	mm
19	Average opening speed	m/s	0.6±0.2
20	Average closing speed	m/s	0.9±0.2
21	Connact closing bounce time	ms	≤2
22	Three-phase opening and closing asynchronization	ms	≤3
23	Distance between live parts and of phase to earth	mm	≥125
24	Maximum torque of manual operation	N.m	≤160
25	Rated closing operation voltage	V	≌220/110
26	Rated opening operation voltage	V	≌220/110
27	Time of switch opening triggered by breaking of fuse	ms	35±5
28	Impact output energy at breaking of fuse	J(Joule)	1

Note: The sensor with live display can be used for the switch insulator

Selection of HV current-limiting fuse

Transformer capacity(kVA)	100	125	160	200	250	300/315	400	500	630	750/850	1000	1250	1600	2000	2500
Rated current of fuse(A)	16	16	16	20	25	31.5	40	50	63	80	80	100	125	160	200

The model of recommended fuse is XRNT-12HV current-limiting fuse;
The impact output energy of recommended fuse is:1J(Joule) middle-sized.
                 

Right operation: The conventinal L is 167; recommended cabinet is: cabinet deepth 900, width 650, height 2000.
The length L can be customized as per the customer's requirements.





 

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