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Siemens SIMATIC ET 200SP User Manual

Siemens SIMATIC ET 200SP
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Power quality analysis functions
11.1 Power quality analysis status
Analog input module AI Energy Meter 480VAC/CT HF (6ES7134-6PA00-0CU0)
Manual, 07/2018, A5E42674880-AA
89
Harmonic
Harmonics are superimposed vibrations deviating from the fundamental frequency of the
supply network (50 Hz or 60 Hz) with an integer multiple of the fundamental frequency.
Harmonics are generated by equipment with a non-linear currentvoltage characteristic such
as transformers, gas discharge lamps and power electronics devices.
Harmonic component THD (Total Harmonic Distortion)
The THD defines the ratio of the power of the harmonics to the power of the fundamental
and provides information about the power quality. The value is dimensionless and is stated
as a percentage [%].
The AI Energy Meter HF returns THD+N (Noise) and considers the entire current signal
(DS 163) or voltage signal (DS 161). Interference in the network is not filtered out.
11.1
Power quality analysis status
Information about the power quality status can be found in the measured value "Power
quality analysis qualifier" with the measured value ID 65496.
The bits 0 to 4 in byte 1 to 3 show in status "1" that information has been available since the
last reset, which can be retrieved. The bits 5 to 7 in byte 1 to 3 in status "1" show that the
event is currently active. If the event is not active, "0" is displayed.
The measured value "Network analysis qualifier" has the following structure:
Address
Content
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Byte 0 Power quali-
ty analysis
qualifier
module
Reserved Reserved Status of harmonics analysis:
0
D
: No data, no start
1
D
… 62
D
: running
63
D
: Completed, data is available
Byte 1 Power quali-
ty analysis
qualifier
phase L1
Overcur-
rent
Event
currently
active
Voltage
swell
Event
currently
active
Voltage
dip
Event
currently
active
Overcur-
rent
Event
occurred,
data
available
Peak
value
current
Event
occurred,
data
available
Voltage
peak
Event
occurred,
data
available
Voltage
swell
Event
occurred,
data
available
Voltage
dip
Event
occurred,
data
available
Byte 2 Power quali-
ty analysis
qualifier
phase L2
Byte 3 Power quali-
ty analysis
qualifier
phase L3

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Siemens SIMATIC ET 200SP Specifications

General IconGeneral
System TypeDistributed I/O System
MountingDIN Rail
Communication ProtocolPROFINET, PROFIBUS
IP RatingIP20
CategoryI/O Systems
Supply Voltage24 V DC
ModularityYes
Hot SwappingYes
Storage Temperature-40°C to +70°C
Digital InputsYes
Digital OutputsYes
Analog InputsYes
Analog OutputsYes
Communication InterfacePROFINET, PROFIBUS
Number of ModulesUp to 64
Relative Humidity5 to 95% (non-condensing)
Operating Temperature-25°C to +60°C

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