Siemens SICAM 7KG85X, Manual, Page: 15 / 281

User Information
Application
SICAM P850/P855 is a multifunctional device with power quality class S accuracy.
The device is characterized by the following properties:
•
Power Quality instrument - Class S for normative IEC 61000-4-30
•
Class 0.5S for energy, complying with IEC 62053-22, IEC 62053-23, and IEC 62053-24
•
Web browser for parameterization and evaluation, full PQ analysis, and easy-to-read analysis according to
EN 50160 standards
•
Cybersecurity features such as HTTPS
•
Fixed installed, indoor
•
For application in EMC environment, Class G
The device measures voltages up to 480 V in 1-phase systems and in 3-wire and 4-wire systems (with neutral
phase). The input circuits for voltage measurement can be used in IT, TT and TN networks. To ensure galvanic
separation for current measurements, the lines connected to the current measurement inputs are galvanically
separated from the current transformers.
If external voltage and current transformers are not used, the device can process rated input alternating
voltages of up to V
Ph-N
= 400 V (347 V for UL condition), V
Ph-Ph
= 690 V (600 V for UL condition) and rated input
alternating currents up to 5 A.
The energy management functions also allow determining load profiles . In addition to the measuring func-
tion, the device provides records of the measured values and the load profile in programmable time intervals.
Long-term data and events are analyzed and output as report according to voltage-quality standards, for
example EN 50160.
The integrated Web Server can be used to set the parameters and display the measured values on HTML pages
of the connected computer. With the graphic display on the front panel, a limited parameterization via soft-
keys can be carried out and measured values are shown at display.
To communicate with control systems and other process automation equipment and to transmit, for example,
operational measured values, metered values, indications, and load profiles, the device provides 1 configu-
rable Ethernet interface and 1 optional RS485 interface for serial communication.
To transmit data files for power quality in PQDIF (IEEE 1159.3) and waveforms in COMTRADE, the device uses
the Ethernet interfaces via the IEC 61850 protocol. For example, the data files in PQDIF and COMTRADE can be
transmitted to the SICAM PQS system and SICAM PQ Advisor software.
The device has 2 binary outputs internally. You can use the binary output to give indications or use the binary
output as an energy pulse output.
Security
Security features are:
•
HTTPS
•
Automatic logout after a timeout of no action
•
Firmware with digital signature
•
Simple Network Management Protocol
•
Modbus TCP as read only
Measured Quantities
The following measured quantities can be recorded or calculated:
•
Power frequency
•
Magnitude of supply voltage
1.1
Introduction
1.1 User Information
14 SICAM, SICAM P850/P855 7KG85X, Manual
E50417-H1040-C482-A9, Edition 03.2022