When monitoring becomes managing

New CEM series of multifunction energy meters for DIN rail connection

In an increasingly globalized world it is essential to manage efficiently the electrical consumption. In addition, the steady increase in the price of energy creates to the users the need to find new formulas to manage their installations.

The new CIRCUTOR's CEM series of multifunction energy meters provides all the essential information about the different consumption habits of an installation, helping to save money, resources and improving the installation's electrical energy efficiency.

The information is the key for an efficient management

Why install a CEM meter?

The objective of the new modular CEM meters is to allow the user to understand the electrical installation behavior by recording real energy patterns in order to take correct decisions to reduce and manage its electrical consumption. Thus, the user gets all the relevant information about how, when and where the energy is consumed. With all that information, it is possible to have all the billing data before receiving the utility's official bill, allowing the user to share out the costs with the different areas in the installation.

The task of identifying the individual consumptions, in one installation, is an almost impossible exercise if sectorized measurements are not taken. Therefore, to allocate costs to processes, devices or areas, it is completely necessary to implement a solution able to report detailed information about the electrical consumption by subdivisions and/or individually. In addition, CEM meters register the energy monetary cost (Euro, Dollars,..) and kgCO2 emissions for each tariff.

As an added value, it's reduced space and easy installation on DIN rail avoids high investments in modifying the current installation. This makes the new CEM's ideal to be installed in any switchboard or existing machinery.

The importance of the MID approval (EN 50470)

The new CEM energy meters are certified according to the European Directive MID (EN 50470). This allows the meters to be used for economic transactions (internal energy invoicing).

The EN 50470 standard declares the design and manufacturing process control by an external laboratory, ensuring the meters quality and transmitting the confidence to the different end users.

Benefits

The new modular CEM meters are designed to be installed in any sector or application, always offering a wide range of advantages to the end user. Summarizing, three different areas of use can be defined:

• Tertiary sector: Is common to find installations such as shopping malls, hotels, campsites, offices, airports or marinas where there is installed a single official utility meter which measures the total consumption of the installation. To allocate the real energy cost to the end users some formulas can be used but the most correct action would be to measure the real consumption, with high accuracy and individually.

Moreover, its reduced space with DIN rail connection makes its installation fast and easy in the existing switchboards.

Individual measurements allow a correct allocation of costs

• Industrial sector: All industrial installations have an official billing meter installed on the main to measure and register the total energy consumption. However, this fact creates an ignorance of where, when and how this energy is consumed.

Registering the electrical consumption, the manager will be able to make the right decisions while connecting the different loads or starting processes, preventing simultaneous consumptions and maximum demand penalties. Moreover, the manager will have enough information to select the installation's most suitable electrical tariff.

As additional features, CEM meters register the energy cost (Euro, Dollar,...) and kgCO2 emissions for each tariff being key factors for understanding and improving the energy efficiency of the installation. Thus, by means of rigorous measurements, the operational manufacturing costs (OpEx) will improve.

The measurement requires precise knowledge, individually
or sectorized, of each productive process

• Condominium: There are some buildings where the neighbors share between them the total electricity bill without any control. In these cases, there is a meter installed on the main and the total consumption is paid by dividing the cost between the different tenants. Without an individualized measurement the distribution of costs may not be equal because it depends on the use of each tenant.

Installing the new modular CEM meters, the manager avoids possible complaints from the tenants. Therefore, installing individual meters together with the PowerStudio Scada software, the manager will be able to invoice customized bills to each tenant, even before receiving the official utility bill for the entire building.

Individual measurements transmit confidence to the different tenants

The benefits for each sector can be summarized in the following table:

CEM meters with OSC communications

In order to perform the different energy consumption analysis, CIRCUTOR launches the new CEM series of multifunction energy meters for DIN rail connection with OSC communication system. The new range consists of single (CEM-C10) and three phase direct (CEM-C20) and indirect (CEM-C30) meters. All the meters have a single pulse output to send pulses in relation to the consumed or generated energy.

To provide communications to the system it is as easy as coupling an additional CEM-M module which communicates directly with a CEM meter through OSC system. This system consists of an optical window that allows optical communications between the meter and the CEM-M module without the need of any extra wiring. Furthermore, the CEM-M module has a wired RS-485 output to send the meter's information to our PowerStudio Scada software via Modbus/RTU to register and monitor all the relevant data such as energy consumption, voltage, current, power, power factor and frequency.

OSC communication system

The solution: New CEM multifunction energy meters

The new range of modular CEM meters allows obtaining all the relevant information about the different consumption habits of an installation, helping to save money, resources and improve the energy efficiency of an installation.

The CEM range consists on single and three phase static meters to measure the Active energy with Class B/1 (EN 50470/IEC 62053-21) and Reactive energy Class 2 (IEC 62053-23) with DIN rail connection. Each one has a 7-digit LCD display with scrolling screens and two buttons (1 sealable) to show all energy variables.

The CEM-M module provides RS-485 communications with Modbus/RTU protocol, connecting through optical interface (OSC) to any CEM-C meter.

2 modules	4 modules	4 modules	2 modules
CEM-C10	CEM-C20	CEM-C30	CEM-M
Single phase direct energy meter, up to 65 A	Three phase direct energy meter, up to 65 A	Three phase indirect energy meter .../5(10) A	Communication module for CEM energy meters
More information	More information	More information	More information
Electrical parameter measurement   V, A, kW, kW·h, kvar, cosφ			OSC System
Measurement in 2 or 4 quadrants			Modbus/RTU (RS-485)
Impulse output			Plug&play
Sealable
MID Approval   Class B/1 (EN 50470/IEC 62053-21)