Appendix; Accuracy - Siemens ISGS Operator's Manual

Appendix B Metering
8.1

Accuracy

Parameter
rms Curre n t (L & G)
Average rms Curre n t
Ampere Dema n d per Phase
Average Ampere Dema n d
rmsVoltage (L -L & L-N)
Average rms Voltage
Active Power (kW)
kW Dema n d
kW Hours
Appare n t Power (kVA)
Volt-Amperes Reactive (kVAR)
kVAR Hours
Power Factor
Freque n cy
Notes:
( 1 ) Measured at PF 1 . For IPFI
=
(2) Measured at PF
0. For IPFI
=
(3) Energy is accumulated in either kHR or MHR, selectable (parameter).
(4) For power factor, 1 is considered "perfect, " negative is leading and positive is lagging.
VT
(5) P n V n I n where V n
x
= =
Note for all values: Stated accuracy applies only when the device is not in pickup. These measurements are valid over a fre­
quency range of 45 65 Hz and include fundamental, 2nd harmonic, and all odd harmonics up to the 1 3th harmonic of the
to
fundamental line frequency.
42
Ran g e
0 - 250% In Displayed i n Amperes
0 - 250% I n Displayed i n Amperes
0 - 250% In Displayed i n Amperes
0 - 250% I n Displayed i n Amperes
10 - 1 25% V n Displayed i n kV
1 0 - 1 25% Vn Displayed i n kV
0 - 999,999.99 kW
0 - 999,999.99 kWD
0 - 999,999.99 kWHR
0 - 999,999.99 kVA
0 - 999,999.99 kVAR
0 - 999,999.99 kVARH
- 1 - 0 - +1
45 - 65 Hz
< +
1 , ±2% angle error (±2% for IPFI
> +
0, ±2% angle error (±2% for IPFI
rating and I n CT rating.
Accuracy
± 1 % of measureme n t from 50 - 1 25% of In
±0.5% of I n from 1 0 - 50% of In
± 1 % of measureme n t from 50 - 1 25% of I n
±0.5% of In from 1 0 - 50% of In
± 1 % of measureme n t from 50 - 1 25% of I n
±0.5% of I n from 1 0 - 50% o f In
± 1 % of measureme n t from 50 - 1 25% of In
±0.5% of In from 1 0 - 50% of I n
±1 % of measureme n t from 50 - 1 25% of Vn
±0.5% of Vn from 1 0 - 50% of Vn
± 1 % of measureme n t from 50 - 1 25% of V n
±0.5% of Vn from 1 0 - 50% of V n
±2% of measureme n t from 50 - 1 25% of P n
±0. 1 % of V n from 1 0 - 50% of Pn (1) (5)
±2% of measureme n t from 50 - 1 25% of P n
±0. 1 % of Vn from 1 0 - 50% of P n (1) (5)
±2% of measureme n t from 50 - 1 25% of P n
±0.1 % of V n from 1 0 - 50% of Pn (1)
±2% of measureme n t from 50 - 1 25% of P n
±0. 1 % of Vn from 1 0 - 50% of Pn
±2% of measureme n t from 50 - 1 25% of Pn
±0.1 % of V n from 1 0 - 50% of P n (1)
±2% of measureme n t from 50 - 1 25% of Pn
±0 .1 % of Vn from 1 0 - 50% of Pn (1)
±0.04 (4)
±0.1 % of readi n g providi n g voltage is 50%
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0 . 7)
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7)
0.
Siemens Energy
(3)
(5)
(1) (5)
(�
(5)
(� (3)
(5)
VT
primary rati n g
&
Automation, Inc.