Veris Industries E34 Series Installation Manual page 16

E34 Series Installation Guide
Wiring (cont.)
Z207251-0C Page 16 of 42
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3-Wire (Ungrounded) Delta
Figure 10
V3
X
V2 V1
In 3-wire (ungrounded) Delta applications, the E34 supports these applications with the following caveats:
Control Power for the meter cannot exceed 277 Vac. In applications where the L-L voltage is 277 Vac or less (e.g. 208 V line-to-line)
it can be connected to two of the phases being monitored without exceeding the limit. For higher voltages (e.g. 480 V line-to-
line), this must be supplied from a source that is 277 Vac or less. It could be a separate source or a transformer can be used to step
it down from two of the phases being measured.
4-Wire Wye, 3-Wire Split-Phase and 2-Wire Single Phase
Figure 11
4-wire 3-wire
Wye Split-phase
V3
V2
N
N
V1
V2 V1
The E34 supports measurement of all 4-wire Wye, 3-wire split-phase and 2-wire single phase and configurations that operate
between 90 and 300 Vac line-to neutral. Voltage taps are shared by both panels.
Corner-Grounded Delta
Figure 12
V3
V2 V1
Corner-grounded delta: the E34 does not support these applications at any voltage level.
The E34 supports measurement of all 4-wire Wye, 3-wire split-phase and 2-wire single phase and configurations that operate
between 90 and 300 Vac line-to neutral. Voltage taps are shared by both panels.
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2-wire
Single-phase
V1
N
TM
0420