Siemens SG8158-00 사용자 설명서
Data Acquisition
Siemens Energy & Automation, Inc.
45
7.3.2 Voltage Minimum/Maximum Log
The Voltage Minimum/Maximum Log function allows the dis-
play of minimum and maximum values measured by the
relay. The collected information is compared against previ-
ously stored values and the log is updated. All logged values
are time stamped and resetting the log (see Section 6.7) will
reset all log values. No voltages are metered unless the VT
option is installed.
The MinTHD and MaxTHD parameters (4717 and 4718) dis-
play the minimum or maximum total harmonic distortion cal-
culation for the average current. The calculation is an
estimate of the harmonics on the system rather than an
exact measurement.
7.3.3 Power Minimum/Maximum Log
The Power Minimum/Maximum Log function allows the dis-
play of minimum and maximum values measured by the
relay. The collected information is compared against previ-
ously stored values and the log is updated. All logged values
are time stamped, and resetting the log (see Section 6.6) will
reset all log values. No voltages are metered unless the VT
option is installed.
4700 Voltage Minimum/Maximum Log
Address Data
Description
4701 V12 min
Minimum phase voltage
between phases A and B
4702 V12 max
Maximum phase voltage
between phases A and B
4703 V23 min
Minimum phase voltage
between phases B and C
4704 V23 max
Maximum phase voltage
between phases B and C
4705 V31 min
Minimum phase voltage
between phases C and A
4706 V31 max
Maximum phase voltage
between phases C and A
4713 VAv min
Minimum average voltage
4714 VAv max
Maximum average voltage
4717 MinTHD
Minimum value of estimated
total harmonic distortion
4718 MaxTHD
Maximum value of estimated
total harmonic distortion
7.3.4 Frequency Minimum/Maximum Log
The Frequency Minimum/Maximum Log function allows the
display of minimum and maximum values measured by the
relay. The collected information is compared against previ-
ously stored values and the log is updated. All logged values
are time stamped, and resetting the log (see Section 6.7) will
reset all log values.
4800 Power Minimum/Maximum Log
Address Data
Description
4801 kW min
Minimum power value
4802 kW max
Maximum power value
4803 kW dem min
Minimum active power demand
value
4804 kW dem max
Maximum active power demand
value
4805 kVA min
Minimum kilovolt-ampere value
4806 kVA max
Maximum kilovolt-ampere value
4807 kVAR min
Minimum kilovolt-ampere
reactive value
4808 kVAR max
Maximum kilovolt-ampere
reactive value
4809 PF max
Maximum power factor value
4810 PF min
Minimum power factor value
4900 Frequency Metering
Address
Data
Description
4901 Fmin
Minimum frequency value
4902 Fmax
Maximum frequency value
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