Siemens CP-8021 User Manual

System Components and Technical Data
152 Unrestricted SICAM A8000 / CP-8000 • CP-8021 • CP-8022 Manual
DC8-037-2.02, Edition 10.2017
5.7.2.5 AI-8510
5.7.2.5.1 Functions
• Acquisition of the measuring currents
─ Acquisition of currents through submodule CM-8820 using DFT algorithm, 1 signal
sampling per millisecond
─ Nominal value 1 A/5 A with 100% overrange and 16 bit resolution
• Acquisition of the measuring voltages
─ Acquisition of voltages through transformers or direct measurement using DFT algo-
rithm, 1 signal sampling per millisecond
─ Circuitry of the voltage inputs with phase voltages
─ Nominal value 100 V/√3, 230 V, 400 V/√3 with 50% overrange and 16 bit resolution
─ Supervision of the measuring voltage
• Acquisition of the frequency
─ Acquisition of frequency using signal zero crossing of voltage U1
─ Measuring range 45 Hz to 65 Hz (parameter-settable nominal frequencies of 50 Hz
and 60 Hz) with a resolution of 100 mHz
• Calculation of Values from Acquired Values
─ Current r.m.s. value I1
tc
, I2
tc
, I3
tc
─ Phase voltage r.m.s. value U1
tc
, U2
tc
, U3
tc
*)
─ Phase-to-phase voltage r.m.s. value U12
tc
, U23
tc
, U31
tc
─ Frequency
tc
Voltage and current r.m.s. values undergo a linear (technological) adaptation
tc
and are
the base for calculating further values
─ Zero current r.m.s. value I0
t
─ Zero voltage r.m.s. value U0
t
─ Active power P1
t
, P2
t
, P3
t
─ Active power P (total value)
t
─ Reactive power Q1
t
, Q2
t
, Q3
t
─ Reactive power Q (total value)
t
─ Apparent power Q1
t
, Q2
t
, Q3
t
─ Apparent power Q (total value)
t
─ Power factor 1
t
, 2
t
, 3
t
─ Power factor (total value)
t
─ Phase angle I1
t
, I2
t
, I3
t
, IN
t
─ Phase angle U12
t
, U23
t
, U31
t
─ Phase angle , U1
t
, U2
t
, U3
t
, U0
t
To calculated values the following functions are applied:
─ Revision
tc
─ Format conversion
t
− Normalized, technologically scaled or short floating point
− Suppression of zero range
─ Change monitoring
t
─ Fault detection
─ Spontaneous transmission of changes
t
Note
The previously mentioned functions are described in detail in the document SICAM RTUs Common Func-
tions Peripheral Elements according to IEC 60870-5-101/104, chapter “Measurement in Three-Phase
Systems – I/O Module”.

Siemens CP-8021 Specifications

General

Brand	Siemens
Model	CP-8021
Category	Controller
Language	English