Measurement and Monitoring Unit
SICAM MMU (Measurement and Monitoring Unit) is a power monitoring device that allows the measuring of electrical quantities in electrical networks in a single unit.
In industries, power plants and substations, the SICAM MMU is applied to measure and calculate parameters (e.g.current, voltage, power, phase angle, harmonics and unbalance, energy or frequency) and assign them into further processing and visualization to control center (SCADA, DMS, EMS etc) through IEC 60870-5-104 or automation system over MODBUS TCP Protocols.
Design: Compact and robust for flexible application in industrial and utility environments
Connections in 1-phase systems, as well as in 3-wire and 4-wire systems
Applications: Flexible for power utilities, industrial and commercial sector applications
Measurements: more than 100 measured or calculated values available
Temperature range: -25 °C to +55 °C/-13 °F to 131 °F
Uncertainty: typically 0.1 % for voltage and current at rated input IEC 60688, and 0.2 s acc. to IEC 62053-21
High EMC immunity: according to standards EN 61000-6-2 and EN 61000-6-4 for the EMC directives, and with the standard EN 61010-1 for the low-voltage directive
UL Certfication: This product is UL-certified to standard UL 61010-1.
KEMA certification – IEC 60870-5-104 de.2 (IS2006).
Flexible current measurement range (up to 2 × In)
2 individual binary outputs for fast switching, indications (e.g., limit violation) and operation status monitoring
4 LEDs for local status visualization
Internal battery for real time clock and saving of energy counter values in case of a power outage
User-friendly operation through Web server (no extra software for parameterization needed, no converters and extra cables)
Real time clock (RTC), field bus synchronization or networksynchronization possible via NTP)
Ethernet communications via IEC 60870-5-104 (if required redundantly executable) or MODBUS TCP protocols
Transmission of energy points via IEC 60870-5-104 protocol
Extension of I / Os using the SICAM I / O Unit as sub-device via the Ethernet interface.
Top-hat rail mounted device
Plastic case 96 mm × 96 mm × 100 mm/ 3.78 in. x 3.78 in. x 3.94 in. (W × H × D)
Degree of protection IP20.
DC 24 – 250 V
AC 110 – 230 V, 45 – 65 Hz.
Input and output circuits
4 inputs for alternating voltage measurements
3 inputs for alternating current measurements up to 10 A continuous
2 Individually parameterizable binary outputs.
6 binary inputs and 6 binary outputs with SICAM I / O Unit expandable.
Automatically monitor the functions of its hardware, software, and fi rmware components.
Ethernet: IEC 60870-5-104 or MODBUS TCP communication protocol. IEC 60870-5-104 can be executed redundantly.
The following measurands can be recorded or calculated from the measured quantities:
Unbalance of alternating voltage and alternating current
TRMS (True RMS) for alternating voltage and current
Active, reactive and apparent power
Active, reactive and apparent energy
Angle between phase-to-ground voltage L1-L2 and L1-L3
Power factor and active power factor
Voltage and current till 21st
– Mean value of the 3 phase voltages: Vavg
– Mean value of the 3 phase currents: Iavg.
For a common time basis when communicating with peripheral devices and time stamping of the process data.
External time synchronization via Ethernet NTP
Internal time synchronization via RTC (if external time synchronization is not available).
Support the integration of online measurement into control center and substation automation, protection via protocols IEC 60870-5-104 or MODBUS TCP, e.g. for voltage and load levels control
Monitoring of transformers and decentralized power generation
Alarming and notifi cation of limit violations via protocol or binary outputs
Basic power quality profi le monitoring (voltage, frequency, harmonics and unbalance)
Option for supporting all power systems IT, TT and TN.
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