11
Three-phase four-wire system
*3 CTs are needed to measure three-phase four-wire system.
Vn terminal should be connected to N-phase which is grounded.
◆
When measuring a load with exceed input voltage
Voltage transformer (VT) is needed when you measure a load with over input voltage.
Use a VT, those secondary voltage rating is 110V.
Grounding the secondary side of VT and CT is not necessary with low-voltage circuit.
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: [email protected]