Siemens ISGS SG8158-00 - Manual (Page 52)

Data Acquisition
46 Siemens Energy & Automation, Inc.
7.4 Metered Data
Metered data is stored by the ISGS relay and can be dis-
played by accessing address blocks 4100 to 4900. The dis-
play of this data does not require a password. You can
display the same data more conveniently by using Wisdom
software described in Chapter 8.
7.4.1 Current Values
The Current Metering function stores the metered current
and current demand values for the ISGS relay. The relay will
measure and display the rms values of the current for the
three phases and ground or neutral. The ISGS relay also
shows total harmonic distortion as a percentage of the fun-
damental for the three phase current inputs. This function
displays undefined when the measured components are
below the total harmonic distortion threshold.
7.4.2 Voltage Values
The Voltage Metering function allows the display of metered
voltage data for the ISGS relay. The rms voltage measure-
ments for this function depend on the selected VT connec-
tion method, either line-to-ground or line-to-line. The relay
also shows total harmonic distortion as a percentage of the
fundamental for the three phase voltage inputs. It displays
undefined when the measured components are below the
total harmonic distortion threshold. This function is only avail-
able if the voltage input option is installed.
4100 Current Metering
Address Data Range
4101 I Phase A 0-250% I
CT
4102 I Phase B 0-250% I
CT
4103 I Phase C 0-250% I
CT
4104 I Neutral 0-250% I
CT
4105 I Average 0-250% I
CT
4106 I Demand Phase A 0-250% I
CT
4107 I Demand Phase B 0-250% I
CT
4108 I Demand Phase C 0-250% I
CT
4109 I Demand Average 0-250% I
CT
4110 THD Current 0-250% I
CT
I
CT
= primary CT rating
7.4.3 Power Values
The Power Metering function stores the metered voltage
data for the ISGS relay. This function is only available if the
voltage input option is installed.
7.4.4 Frequency Values
The Frequency Metering function allows the display of the
system frequency. This function is only available if the voltage
input option is installed.
4200 Voltage Metering
Address Data Range
4201 V Phases A-B 10-125% Vn
4202 V Phases B-C 10-125% Vn
4203 V Phases C-A 10-125% Vn
4204 V L-L Average 10-125% Vn
4209 THD Volts 10-125% Vn
IVT = primary VT rating
4300 Power Metering
Address Data Range
4301 kW 3-Phase 0-999,999.99 kW
4302 kW Hours 0-999,999.99 kWHR
4303 kW Demand 0-999,999.99 kWD
4304 kVA 3-Phase 0-999,999.99 kVA
4305 kVAR 3-Phase 0-999,999.99 kVAR
4306 kVAR Hours 0-999,999.99 kVARH
4307 PF -1 — 0 — +1
4400 Frequency Metering
Address Data Range
4401 Frequency 45-65 Hz
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