Operating conditions
1.Amblent temperature-10-+40C
2.Attude s1000m sensor heght140mm)
3.Rdatvehumidity:Day average relativehumbdity s95%Monthaveragerelative humbditys90%
4.Earthquake lintensity:s8degree
5.Dirtinessdegrce:1

JN15-24 series indoor earthing switch is a new design and improved product of our company according to the JN15 type,theinstaling size without any changelsuitable for electric power system with 20-24KV,Three-phase,AC 50(60)Hz,supported withvarious kinds of HVswitchgear and as ear thingprotection.
Standard:IEC129,JEC 62271-102

JN22-40.5/31.5 series indoor MV earthing switch is researched and developed by XIAN HV Electric research organization,withadvanced design and steady performance,simple structures,simple mounting and adjustment,suitable of electric power system with 40.5KV,Three-phase,AC 50Hz.Support with KYNo-40.5 and other various kinds of MV switchgear and as earthingc protection.
Standard:IEC129,IEC 62271-102

JN22-40.5/31.5series indoorMV earthing switchis researched and developed by XIAN HV Electric research organization,withadvanced design and steady performance,simple structures,simple mounting and adjustment,suitable of electric power system
with 40.5KV,Three-phase,AC 50Hz.Support with KYNo-40.5 and other various kinds of MVswitchgear and as earthingprotection
Standard:IEC129,IEC 62271-102

This product can be used in indoor system of AC50Hzand rated voltage of 3.6-40.5KV to protect thevoltagemutual-inductor from over loading and circuit break.(tested by-inductor from overloading and circ-uit break.(Tested by National high-voltage quality
Supervising and Testing Center,inaccordance with IEC282-1).

The product can be used in indoor AC system of 50Hz and rated voltage 3.6kV and 7.2KV 12KV.When used togetherwith otherprotectionfacilitlesuch as switches and vacum contactors).it works to protect high-voltagemotor and other electric facilitiesfrom overloadingandcircrit break.

The product is used in overload or short-circuit protection for electric transformer.The current limiting means that the fuse will cut off the circuit before the short-circuit currentreaches thepeak value

The product is used in overload or short-cicuit protection for instrumenttransformer.Atthetime of holdingupbyrestrain circuitcurent way to get minimum from carry on instantaneous to turn on and breakjt should be witintherangeof 0.6-1.8A to fuse theelectric current in one minute.

Outdoor drop type fuses are suitable for 35kV andbelow voltage and frequency 50Hz power systems,used for overload and shortcircuit protection of transmission lines andpower transformers,and for breaking and closingrated loadcurrent.
The drop type fuse consists of an insulation bracket and a fuse tube,with static contacts installed at both endsof the insulationbracket anddynamic contacts installed at both endsof the fuse tube.The fuse tubeconsistsof an innerarc extinguishing tube andan outer phenolic paper tube or epoxy glass cloth tube.