FZ(R)N21A-12 indoor high-voltage vacuum load switch (fuse combination apparatus) is suitable for use in 10kV 3-phase AC 50Hz power systems. It can be used in conjunction with complete sets of distribution equipment, ring network switchgear, and combined substations. It is widely used in urban network construction and renovation projects, industrial and mining enterprises, high-rise buildings, and public facilities. It can serve as a ring network power supply or terminal, playing a role in the distribution, control, and
protection of electrical energy. The technical performance of this product complies with IEC 60265-1/FDIS “High-voltage switches -Part 1: High-voltage load switches with rated voltage above 1 kV up to and including 52 kV,” IEC 60420 “AC high-voltage load switch
fuse combination apparatus,” GB 16926 “AC high-voltage load switch-fuse combination apparatus,” and GB 3804-63 kV “AC high voltage load switch” standards.
FZ(R)N21A-12 indoor high-voltage vacuum load switch (fuse combination apparatus) has the advantages of high breaking capacity, safety and reliability, long electrical life, frequent operation capability, compact structure, small size, light weight, and minimal
maintenance requirements. It can break the rated current, overload current (FZN21-12DR/T125-31.5), short-circuit current, and prevent equipment from operating under phase loss conditions. The switch has a clearly visible isolation gap, and it can be equipped with a grounding switch with closing capability and a motor-driven spring mechanism for remote operation and control.
Ambient condition
Altitude: ≤1000m
Ambient air temperature: Upper limit: +40℃, Lower limit: -25℃
Relative humidity: Daily average ≤95%, Monthly average ≤90%
Seismic intensity: Not exceeding 8 degrees
No fire, explosion hazard, chemical corrosion, or severe vibration
Pollution level: II
