Electro Industries/GaugeTech Nexus 1262, Руководство пользователя

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Doc# E151701 12-1
12: Meter Calculations
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12: Meter Calculations
12.1: Measurements and Calculations
The Nexus® 1262/1272 Meter measures many different power parameters. Following
is a list of the formulas used to perform calculations with samples for Wye and Delta
services.
Samples for Wye: v
a
, v
b
, v
c
, i
a
, i
b
, i
c
, i
n
Samples for Delta: v
ab
, v
bc
, v
ca
, i
a
, i
b
, i
c
Root Mean Square (RMS) of Phase Voltages: N = number of samples
For Wye: x = a, b, c
Root Mean Square (RMS) of Line Currents: N = number of samples
For Wye: x = a, b, c, n
For Delta: x = a, b, c
V
v
N
RMS
x t
t
N
x



( )
2
1
I
i
N
RMS
x t
t
N
x



( )
2
1