KYORITSU 8031 PHASE ROTATION TESTER *Digital phase Indicator with open phase checker *Phase indicator designed to check the presence of open phase and also the phase sequence by LED and buzzer at the same time *Small , lightweight , and portable. Features :  Two functions is One Unit :  *Model 8031 is designed to check phase sequence. Lamps provided on the unit will also tell you whether phase is open or which phase is open at a glance. Large - Size Alligator Clips :  *Can easily hold terminals of switchboards. Highly Reliable :  *Can check a wide range of 3-phase power source from 110V to 600V. Sealed against dust, the unit ensures highly dependable and trouble-free performance. Functional Design : *Small, lightweight and portable. Designed for maximum ease of operation and ruggedness throughout. Safety Design :  *No exposed metal parts. Safety features are incorporated throughout including the push switch button designed to minimize damage due to negligence. Specifications :  *Voltage : 110V ~ 600V *Time Limit for Continuous Use : Within 5 minutes in case voltage is above 500V *Frequency : 50/60 Hz *Withstand Voltage : 4000V AC for one minute *Dimensions : 106 (L) X 75 (W) X 40 (D) mm *Weight : Approx. 350g *Cord : 1.5m each of red (R) , white (S) and blue (T) cord *Fuse : 0.5A/250V (Model 8031F only) *Accessories : Instruction Manual/Carrying Case