Page 100 - E24 Electrical Notebook

96 - Energy Management Energy Management Integrated Web-Based Solution
for Energy Management Type VMU-C
Energy Management Energy Meter Type EM21 72V
Product Description
Product Description
VMU-C is a combination of modules which performs the monitoring of an
Three-phase energy meter with removable front LCD display unit. Energy Management installation.
The same unit can be used either as a DIN-rail mounting or panel
mounting energy meter. The core unit is VMU-C gathering data from up to 32 energy meters; the
This general purpose three-phase energy meter is suitable for both active meters can be both AC or DC meters.
and reactive energy metering for cost allocation, as well as for main
electrical parameter measurement and retransmission (transducer In addition to the data-logging, it also performs the management of local
function). or remote (via VMU-M) VMU-O “I/O unit” and/or VMU-P “Environment
Housing for DIN-rail mounting with IP50 (front) protection degree. variable unit” and provides an FTP push functionality.
Current measurements are carried out by means of external split core
current sensors with 0.333V output while voltage measurements are VMU-C can also provide, by means of the VMU-O modules, relay alarm
carried out either by means of direct connection or by means of potential contacts and digital inputs (e.g. for status indication to sense the tripping
transformers. of an automatic switch).
EM21-72V is provided, as standard, with a pulsating output for active
energy retransmission. The VMU-W unit has the task of transmitting, with wireless modem
In addition the 2-wire RS485 communication port is available as an option. technology, all the data when a wired LAN or Internet access is not
available.
Main Features
The FTP push function enables a FTP based communication from VMU-C
• Easy connections management & detachable display to an external FTP server (owned by the enduser), to transmit in a simple
and standard way a predefined set of data (using CVS format).
• Multi-use housing: for both DIN-rail & panel mounting applications
• Equivalent to Class 1 (kWh) of EN62053-21 In this case, data is gathered and logged by VMU-C from the energy
• Equivalent to Class 2 (kvarh) of EN62053-23 meters and VMU modules in the field and, following a schedule or a
• Accuracy ±0.5% RDG (current/voltage) trigger, is grouped into a file and uploaded to the defined FTP server.
• Instantaneous variables readout: 3 DGT
• Energies readout: 7 DGT The upload action is repeated in case of failure.
• System variables: W, var, PF, Hz, phase-sequence
• Single phase variables: VLL, VLN, A, PF In addition to the protocol, VMU-C can communicate data in M2M
• Energy measurements: total kWh & kvarh (machine to machine) scenario also via HTTP protocol.
• TRMS measurements of distorted sine waves (voltages/currents)
Main Features
• One pulsating output (opto-mosfet)
• RS485 serial output (on request) (MODBUS-RTU), iFIX • Integrated modular local monitoring system for Energy Management
• SCADA compatibility plants based on Webserver & FTP/push capability
• Self-power supply
• Dimensions: 4-DIN modules & 72x72mm • Up to 8 DIN modules configuration equivalent to 140mm width
• Protection degree (front): IP50
• Application adaptable display & programming procedure • VMU-C EM can manage on RS485 bus up to 32 Energy Meters or
Power Analysers
(Easyprog function)
• VMU-C EM can manage on local bus 1 VMU-W modem unit

• VMU-C EM can manage on local bus up to 4 VMU units & up to 10
VMU-M based arrays on RS485 bus

• Any VMU-M based arrays can manage up to max 1 VMU-P unit &
max 3 VMU-O unit

Carlo Gavazzi UK Ltd Tel : 01276 854110
4.4 Frimley Business Park Fax : 01276 682140
Frimley @CarloGavazzi_UK
Camberley Email : sales@carlogavazzi.co.uk
Surrey GU16 7SG Website : www.carlogavazzi.co.uk