SPF( LW3)-12 outdoor high voltage SF6 circuit brea

SPF-12 outdoor high voltage SF6 circuit breaker is a new outdoor high voltage circuit breaker using SF6 gas as insulating and arc-extinguishing medium. It is a new device for distributing electricity in condition of outdoor AC 3-phase, rated voltage 12kv, frequency 50/60HZ.it used as 12kv sectionalizing switch, linking switch for city power network and12kv side cable for 35kv medium and small current transformer. it is an intelligent auto switch after being installed with microcomputer control device link FTU.The shell of the circuit breaker uses stainless steel and it is welded with argon arc so as to get good imperviousness. The explosion and pressure relieving device is in stalled in order to avoid the shell explosion of circuit breaker because of abnormal increase of inner pressure of the switch.Comparing with other 12kV outdoor circuit breakers, SPF -12 outdoor high voltage SF6 circuit breaker has the advantages of simple structure, reliable arcing and insulating performance, small operation power, high rated parameters, and long electric life and non-maintenance period.Main technical dataNOItemUnitParameter1Rated voltagekV122Rated frequencyHz503Rated currentA630/12504Rated short circuit breaking currentkA16/205Rated short circuit making currentKA40/506Rated operating sequenceO-0.3s-CO-180s-O7Rated peak withstand currentkA509Rated short time withstand current/4skA/s16(20)/410Rated peak value withstand currentkA40/5011lightning impulse withstand voltageKV75/85131min power frequency withstand voltagekV42/4814Rated inflation pressure(under20°C)mpa0.3515Mechanical lifetimes6000