|FK(R)N12-12D Indoor Load Break Switch-Fuse Combination Apparatus|
SummaryFKN12-12D series air-blast Ioad break switch and FKRN12-12D series air-blast load break switch-fuse combination apparatus are new series switchgear applies to three-phase electric distribution system of rated 12kV, acting as protecting and control apparatus for transformers, cable and overhead wiring. These series are especially applicable in rural, urban terminal substation and prefabricated substations, as well as ring network power supply. FKN12-12D can break and make Ioad current and over-current. FKRN12-12D can break and make over-current load current and short-circuit current(Iimited current fuse). This product is featured with impact structure aesthetic appearance. reliable interlock and high insulating level. In the spring storage operation mechanism, ON/OFF speed is free from the influence of the manpower. For the arc-extinguish, electric arc-extinguish inside the insulating cover, the free gas occurs at sparking do not cause descend of insulating level between phases and phase to earth. The insulation cover clapboard separates electrified part thus boost protection grade of ring main unit. The copper-tungsten contact and main contact brings along reliable conductivity and long life. This product achieves sound fame due to easy maintenance and operation as well as reliable performance. It is in compliance with IEC62271-105.
Ambient conditions1. Altitude: ≤1000m;
2. Ambient temperature: -25%~+40℃;
3. Relative humidity: daily average≤95%, monthly average≤90%;
4. Eadhquake intensity: ≤8 degree;
5. Pollution degree: Ⅱ;
6. Applicable occasions should be free from inflammables, explosives, corrosives and severe vibration.