Table of Contents
Advertisement
1
User Information
Application
The SICAM Measurement and Monitoring Unit (MMU) is capable of measuring electrical quantities (e.g. alter-
nating current, alternating voltage) in power-supply systems. Transmission of quantities to the control center
can take place e.g. directly with IEC 60870-5-104 protocol. The device with protection class IP20 is used in 1-
phase systems, in 3-wire and 4-wire systems (with neutral conductor). It is mainly applied by power utilities but
also in other industrial and commercial sectors.
The measurements are obtained from the alternating quantities of current and voltage supplied to the AC in-
puts. Without using external voltage and current transformers, the device can process rated input AC voltages
up to V
= 400 V (347 V for UL conditions) and V
ph-N
currents up to a maximum of 5 A.
Depending on the device type, the input circuits for voltage measurement are either designed as voltage divid-
ers or they are galvanically isolated. Devices with galvanic isolation can be used without voltage transformers
in the power systems IT, TT and TN. Devices with a voltage divider can also be used in these power systems;
for IT power systems, however, an upstream voltage transformer is required.
After conversion via the Ethernet interface, the output values can be transferred as digital data to automation
systems or other systems.
To add 6 binary inputs and 6 binary outputs to the SICAM MMU, a SICAM I/O Unit 7XV5673 can be connected
to the Ethernet interface. The SICAM I/O Unit 7XV5673 can be connected either directly via the Ethernet switch
of the SICAM I/O Unit or via an external switch.
The integrated web server can be used to set the parameters and display the measured values on HTML pages
from the connected PC or notebook.
Measurands
The following measurands can be recorded or calculated from the measured quantities:
•
Alternating voltage and alternating current
•
Unbalanced of alternating voltage and alternating current
•
Active, reactive and apparent power
•
Active, reactive and apparent energy
•
Voltage harmonics and current harmonics
•
Power frequency
•
Phase angle
•
Angle between the phase-ground voltages a-b and a-c
•
Power factor and active power factor
For detailed information on measurands and measured values, see chapter 4.1 and 4.2 and the technical data
in Section 13.1.
SICAM MMU 7KG9663, Device Manual
E50417-H1040-C514-A3, Edition 01.2016
= 690 V (600 V for UL conditions) and rated input AC
ph-ph
15
Advertisement
Table of Contents
