18②Single-phase 3 wire system / Three-phase 3 wire system*Two CTs are required to measure Single-phase 3-wire / Three-phase 3 wire system.＜ Pin type ＞ ＜Screw terminal type＞2) When measuring load with 200V or more systemVT (Voltage transformer) is needed when you measure a load with voltage over 200V system.Use commercial VT, those secondary rating is 110V.*Grounding CT’s secondary side (l line) and VT’s neutral line is recommended for the unit protectionwhen CT or VT breaks down.① Single-phase 2 wire system＜ Pin type ＞ ＜Screw terminal type＞②Single-phase 3 wire system / Three-phase 3 wire system＜ Pin type ＞ ＜Screw terminal type＞

Panasonic KW4M User Manual