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FZN21 Series Indoor Vacuum Load Break Switch

FZN21 series indoor M.V. Vacuum load break switch and its fuse combination are applied for 12kV, 24kV and 40.5kV, 50/60Hz power systems. It widely use for industrial and mining area, to cooperate for Ring Main Units and Terminals. It can distribute, control and protect the electric power. This product fulfill with the requirements of following standards:IEC 60265-1/FDIS,IEC 60420 , GB16926 , GB3804 . This model of switch was combined with frame, isolator, Vacuum interrupter, earth switch, spring mechanism. It has good breaking capacity, safety, and long electrical endurance. This model can break on load current, over load current, and after cooperate with XRNT fuse, that can break short circuit current and protect the equipment work under loss phase. There are visible fracture. There is interlock between isolator, V-LBS and ES, which can forbidden mis-operation.

parameters

Technical Information

Technical Specification
Rated voltage	kV	12	24	40.5
Rated current	A	630	630	630
Rated power frequency	Hz	50/60	50/60	50/60
Short circuit making capacity	kA Peak.	50	31.5	31.5
Peak withstand current	kA Peak.	50	50	50
Short time current	kA eff.
1Sec.		25
3Sec.		20	20	20
Max. breaking capacity in co-operation with fuses IEC 62271-105(IEC 420 1990-11)	A	2000	2000	1700
Max. fuse current(XRNT Fuse)	A	200	200	100
Power frequency withstand voltage 50Hz 1 min,:
- To earth and between poles	kV	42	65	95
- Across isolating distance	kV	48	79	110
Impulse withstand voltage 1.2/50μ s:
- To earth and between poles	kV	75	125	185
- Across isolating distance	kV	85	145	215
Mechanism Endurance
-Vauum interrupter	cycles	10000	10000	10000
-Main switch and Earth Switch	cycles	2000	2000	2000

Overall and installation dimensions

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Product Center

FZN21 Series Indoor Vacuum Load Break Switch