on application_number US 51605195 A description the present invention will be described as it applies to its preferred embodiment it is not intended that the present invention be limited to the described embodiment it is intended that the invention cover all alternatives modifications and equivalences which may be included within the spirit and scope of the invention fig1 is one example of a power supply circuit which could be used with the arc detection and cut out circuit of the present invention the circuit shown in fig1 is a an electronic ballast circuit for driving two rapid start fluorescent lamps the circuit shown in fig1 can be divided into three functional blocks an input stage a power inverter stage and an output stage the input stage is comprised of a harmonic suppression electromagnetic interference emi and transient suppression filter and a bridge rectifier the input stage in connected to a power source at the connections shown as gnd wht and blk in fig1 one purpose of the input filter is to prevent the possible radiation of radio frequency rf interference from the input power line as well as filtering out incoming interference that may be present on the power line the input filter is comprised of varistor v1 transformer t1 and capacitors c1 and c5 as shown in fig1 the input filter is connected to the bridge rectifier which is comprised of rectifying diodes d1 d4 and.