Dielectric:Polypropylene film Gas-impregnated/dry type Wave cut Extruded round aluminum can with threaded Passed UL CE certification Features: Three or single phase,delta connected,with discharge resistor,self-healing technology,overpressure disconnector, naturally air cooled(or forced air cooling) Indoor mounting Voltage:400-415v 440v 525v Capability:1kvar~50kvar