Indoor High Voltage Load Break Switch Nalf Air Insulation Switch Breakers Fuses

 FN18 series Indoor High Voltage Load Break Switch Nalf Air Insulation Switch Breakers FusesFN18 is a general purpose, three-pole, load break switch that offers switchgear owners and assemblers the advantages of an advanced interrupting technology and proven, dependable performance in a compact design. The switch is available to switchgear assemblers as a building block for metal-enclosed and pad-mounted switchgear applications in ratings from 12-40.5 kV.The standard FN18 switch includes a heavy-duty steel frame with stand-off insulators, a unique puffer-type arc extinguishing system, an operating mechanism and current-carrying components, including blade-type interrupters with cast hinges and jaw connectors.Optional accessories and features include a variety of operating handles, a motor operator, auxiliary switches, a shunt trip device, fuse bases, mechanical fuse tripping, grounding switches, mechanical door interlocking and key interlocking.FN18 series indoor high-voltage load switch has the advantages of easy design, operation, compact structure, small volume, full function, light weight, fast breaking and closing speed and high reliability. It is suitable for AC 50Hz, rated voltage 12kV, 24kV, rated current 630A and three-phase distribution system, especially for city network construction and renovation projects, high-rise buildings, ring network power supply of public facilities, and is an ideal product for box-type substation and transformer protection.Technical parameter Rated voltageUnit12kV17.5kV24kV36kV40.5kVRated currentA40063012504006301250400630125063080010006308001000Max. rated currentA400630125040063012504006301250630800800630800800Short circuit making capacityKA peak6750505050Peak withstand currentKA peak8282826666Short time current1 sec.KA eff31.5252031.5252031.5252031.52531.52531.52525251625251631.525162525252525252 sec.3 sec.Mainly active load breaking capacity 21 (test duty 1 and, IEC 60265-1( 265))A400630125040063012504006301250630800630800630800Mainly capacitive breaking capacity (test duty 4, IEC 60265-1 (IEC 265))A15045805050Mainly inductive breaking capacity cosφ=0.15A1616161616Max. breaking capacity in co-operation with fuses IEC 62271-105(IEC 420 1990-11)A16001600 16001600 900900 300300300300300300Power frequency withstand voltage 50 Hz 1 min.-to earth and between poles-across isolating distancekV424545605570808895120Impulse withstand voltage 1.2/50 μs- to earth and between poles- across isolating distancekV758595110125145170195190220Pole distancemm150, 170, 210170, 210170, 235, 275360360Max. operating torque at:-closing K/A mech.-opening K/A mech.Nm115-120 NmK-mech.120 Nm/A-mech. 3Nm80-100 NmK-mech.80-100 NmOperating angle on the shaftdegree130120Opening timems40-6060  Structure/* January 22, 2024 19:08:37 */!function(){function s(e,r){var a,o={};try{e&&e.split(",").forEach(function(e,t){e&&(a=e.match(/(.*?):(.*)$/))&&1