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3-Wire Delta, 2½-Element, 2 PTs & 3 CTs
Use PTs for voltages over 500 V L-L
VOLTS MODE = Delta
Single Phase Connection Diagram
288 V L-N / 500 V L-L max. Use PTs for higher voltages.
VOLTS MODE = Single
Using Potential Transformers
LINE
LOAD
LINE
LOAD
PF = 0.9 (25°) Lag
System Mode Voltage Range Requires PTs
Wye/
Single Phase
up to 288 V L-N or 500 V L-L no
over 288 V L-N or 500 V L-L yes
Delta
up to 500 V L-L no
over 500 V L-L yes