Voltage Tap and Current Transformer Connections

Voltage taps and current transformers must be connected so that they are measuring the same phase. They must correspond according to the following table and diagram:

Figure 1. Neurio W2 Voltage Tap Port (left) and CT Ports (right)
Phase (Example) Meter Voltage Tap Port Meter CT Port
Site L1 A CT 1 (Phase A)
Site L2 B CT 2 (Phase B)
Solar L2 B/C1 CT 3 (Phase C)
Solar L1 A CT 4 (Phase A)

1With combined leads in voltage harness, ports B and C are equivalent (correspond to L2).