ROOTECH ACCURA 3300E, User Manual

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Chapter 4 Measurements Accura 3300E User Guide
Page 70
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Measurements according to Voltage Connection Modes
Voltage, current and power measurements are performed according to voltage connection modes
as follows.
Three Phase 4 Wire Connection
Fig 4.1 Connection with 3 PTs and 3 CTs, Wiring Mode = 3P4U (3P4W Connection)
Voltage Measurement
Vector Diagram Item Description
V
1
V
2
V
3
V
N
: Voltage of connected N terminal
Line to neutral
voltage sensing
▶
Sensing line to neutral voltage[V1, V2,
V3] based on the wired VN terminal
voltage (real line to neutral voltage)
V
A
= V1
V
B
= V2
V
C
= V3
Calculation of line
to line voltage
V
AB
= V
A
– V
B
= V1 – V2
V
BC
= V
B
– V
C
= V2 – V3
V
CA
= V
C
– V
A
= V3 – V1
V
N