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FN5-12(24)Series Indoor Load Break Switch

The FN5-12(24) Indoor AC M.V. load switch and fuse combination is designed by ourselves, combined with the requirement of our country and based on the advanced foreign technique. It has been tested for long term by full aspects and confirmed to IEC62271 “AC M.V. load switch-fuse combinations” and GB3804 “3-63kV AC M.V. load break switch” standard. Compared to the same products of overseas, It has come up to the technique parameter level. For its small size and light weight, it can be used in RMU and compact substations, also widely used for the power distribution of the 12kV and 24kV line and has the perfect function of open phase protection. And break on-load current, over-load current and short circuit current. This Load Break Switch can apply with CS6-I manual operating mechanism. The development of the FN5-12(24) realized the functions of three-position switch: ON/OFF, isolation and grounding.

parameters

Technical Information

Technical Specification
Rated voltage	kV	12	24
Rated current	A	630	630
Rated power frequency	Hz	50/60	50/60
Short circuit making capacity	kA Peak.	63	63
Peak withstand current	kA Peak.	63	63
Short time current	kA eff.
1Sec.		25	25
3Sec.		14	14
Max. breaking capacity in co-operation with fuses IEC 62271-105 (IEC 420 1990-11)	A	1600	900
Max. fuse current(XRNT Fuse)	A	200	200
Power frequency withstand voltage 50Hz 1 min,:
- To earth and between poles	kV	42	55
- Across isolating distance	kV	48	70
Impulse withstand voltage 1.2/50μ s:
- To earth and between poles	kV	75	125
- Across isolating distance	kV	85	145
Mechanism Endurance	cycles	1000	2000

Overall and installation dimensions

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Product Center

FN5-12(24)Series Indoor Load Break Switch