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Articles

Protect your home

 

Avoid service interruptions with the resulting high costs

Preventing the undesirable consequences associated with an interruption in the electric supply of your home is possible. Unexpected interruptions caused by unwanted tripping of the RCCB of a home can result in high economic losses. CIRCUTOR's REC 3 earth leakage protection unit offers the best solution to this problem, thanks to its leakage detection and automatic reclosing system.

Nowadays, most homes have appliances and devices that can become deteriorated or completely damaged in the event of an interruption in the electric supply, even if the interruption only lasts a few hours. Food in a fridge, fish tanks, swimming pools, garage doors or the Internet connection of our homes are some examples. In second homes or homes that are not visited often, the consequences can be even worse if the interruption in the electric supply lasts for days or weeks. At these locations, an interruption in the electric supply can cause damage if the interruptions affect specific units, such as automatic sprinkler systems, refrigerating chambers, swimming pool pumps or outdoor lighting systems.

What does CIRCUTOR's REC 3 offer?

REC 3 is a self-reclosing RCCB, with the capacity to autonomously restore the service of the installation in the event of unwanted tripping. It features a system that measures the installation to detect leakage currents after a disconnection caused by tripping. If the unit is not disconnected it is reset, restoring the normal electric service. If the leakage persists, the REC 3 performs 3 reconnection attempts, after which it is locked and must be manually reset. The unit features two LEDs that indicate its status at all times. In addition, the REC 3 C range of products features two output contacts that can communicate the status of the RCCB to other applications. REC 3 is also very useful in installations that are hard to access or in geographically scattered areas, such as communication antennas or weather stations, as well as for critical production processes of the industrial or service sectors.

All in all, when facing events that can cause unexpected tripping of the RCCB, such as storms or other occasional insulation faults, REC 3 is the earth leakage protection solution that guarantees reconnection of the electric supply, protecting your devices and appliances while you are away.

 

More information:  Self-reclosing RCCB. REC3/REC3C series

 
 

Consult the article:  Don't worry, it will be back

 

 

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Effectiveness vs. Efficiency

 

People not acquainted with the world of energy efficiency often mix up these two terms or use them as synonyms. It is a common error, since energy efficiency refers to a better use of the energy resources of our installation with a sustainable approach.

Effectiveness can be defined as the attainment of a goal or result, regardless of the achievement of a better use of resources when attaining that goal or whether the results affect production processes or not.

In turn, efficiency is defined as the relationship between resources used and the results or goals achieved. Consequently, efficiency is achieved when we use fewer resources to attain a goal or achieve better results with the same resources.

"Therefore, we can be effective but not efficient, and vice versa. In a perfect world, we would be effective and efficient."
 

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WiBeee: Your consumptions in the palm of your hand

 

An efficiency expert always with you

In the current era of information, energy consumers must be able to obtain data on their electrical consumption, in order to be able to take action to improve the energy efficiency of their installations and to make substantial savings in their electricity bill.

Likewise, due to the difficulty of obtaining consumption data from the installed electronic meters, users do not have the chance to react before receiving their electricity bill.

To help us therefore understand how we consume energy and how to reduce consumption, CIRCUTOR is launching one of the most innovative products on the market in recent years: Wibeee.

 


 

What is Wibeee?

Wibeee is a consumption analyzer (single-phase or three-phase), which uses a Wi-Fi wireless connection for obtaining electrical data to facilitate decision-making when it comes to understanding the use of electrical energy.

The unit can be attached to any part of the installation, which helps you to detect any problematic points where energy is not being used efficiently, thus making a significant contribution to the reduction of energy consumption via the remote activation of alarms when the desired limits are surpassed.

In short, Wibeee is the ideal tool to make your electrical installations efficient, for finally taking control and deciding where to spend your money. Finally, a device with personality. Wibeee displays everything you couldn't see before.

  FA-WIBEEE-buen-trabajo-en

Once connected via Wi-Fi, you can immediately access the instantaneous data using your smartphone, tablet or PC, which allows you to view your electrical consumption in real time. In addition, Wibeee also sends all of the data to a server in the cloud server so that you can view and compare the various past consumption logs in a user-friendly manner.

With Wibeee you will no longer get a surprise with your electricity bill, learning to manage your consumption in a simple way.

Cable-free. Wireless system

 

Accurate measurement

Wibeee. Cable-free. Wireless system

  Wibeee. Accurate measurement
The entire system has been designed to monitor information over wireless communications networks. Nothing can come between Wibeee and you.  

You may be thinking that such a simple installation could result in loss of measurement accuracy, but that is not the case. Wibeee has a minimal error percentage and so is able to maintain the measuring guarantee that CIRCUTOR units have always been known for.


 

How will it help you?

Wibeee shows you the instantaneous and past electrical consumption data using any smartphone, tablet or PC, with the help of its integrated web server or via the free Wibeee Circutor app, available for iOS or Android. In other words, it enables a direct Wi-Fi connection so that you can view your data.

It is also possible to configure the consumption analyzer so that it sends the data automatically to a cloud server in order to log the data. With Wibeee connected to the Internet, you can view instantaneous and past data using your smartphone or via alerts configured by your smartphone. Connect to the web platform to consult your data, carry out analyses, configure your user profile, etc. The logs of the analyzer in the cloud are also fully integrable with any platform on the market.

Wibeee is therefore the ideal tool for making your electrical installation efficient, controlling and showing your savings and helping you to take the right decisions in terms of managing energy efficiency.

Consumption control, electrical savings

 

Comparisons are not tedious

Wibeee. Consumption control, electrical savings

  Wibeee. Comparisons are not tedious
Wibeee collects the necessary data on electricity consumption and helps you interpret them, know your consumption profile and save on your energy bill.  

Wibeee lets you analyse your installation(s) by making comparisons between more than one Wibeee or between different periods of time, if you wish. It lets you confirm that the actions you take for energy savings are getting their expected results.


 

It couldn't be easier to install, it's as simple as putting a magnet on your fridge!

The installation of any electrical metering unit can be a complicated task as it requires wiring space and time. Wibeee is extremely easy to install: in ten seconds it's done.

Our technology, which is attached via a clip, is based on the patented system DINZERO and consists of attaching the unit easily to the cable or simply to the upper part of an MCB (miniature circuit breaker). Once switched on, it will begin to convert the measured parameters into information that can be sent via a wireless connection.

Complex installations

 

Installing Wibeee

Avoid complex installations with Wibeee

  Installing Wibeee
Other systems require cabling of devices in small spaces with loss of accuracy and danger of electrocution.  

Just remove it from the box and place it near the switch. No transformers and auxiliary receivers and with the required precision.

Patented system. New technology

   

Wibeee. Patented system. New technology

  Wibeee. Patented system. New technology

DIN-Zero DESIGN
Wibeee takes up no space. It's true.
No space in your electric switchboard.

 

CONNECTION-Zero
It fits perfectly in any electric switchboard with absolutely no cabling.

 


How can you interact with Wibeee?

Wibeee logs the electrical parameters of the installation so that you can view them from wherever you want: from the computer in your office, via smartphone from the café on the corner or from your tablet lying on your sofa at home. Wibeee can also be integrated with the other devices that are compatible with the PowerStudio SCADA system.

The data will be logged in CIRCUTOR's cloud server or can be sent to your own local server, giving you the option of choosing the system that best meets your needs. Once the data has been logged, you can then access it via the following means:

Wibeee logs the electrical parameters of the installation

LOCAL

 

CLOUD

Device built-in web application for configuration and data monitoring. Query using the device's IP.

 

Web server application with database in the cloud. Query via wibeee.circutor.com

MOBILE

 

PowerStudio SCADA

Application specially designed to be used on Android and iOS mobile devices. Consumption control from everywhere.

 

Compatible with the management and data monitoring system. Can be integrated with the other units in your installation.

App Wibeee CIRCUTOR. Take control from your smartphone and tablet

The Wibeee Circutor app is used to register all of your Wibeee units to be installed, as well as to monitor consumption and other electrical variables in real time, or to view past data logs that the units have been logging in the cloud.

Wibeee Circutor allows you to connect your smartphone or tablet to the SSID network of each Wibeee, which will display some simple graphical steps showing you how to install the units, add them to groups and subsequently monitor them.

App Wibeee CIRCUTOR

Once the unit has been configured, you can control it from any point in the installation, with no effort whatsoever, being able to check the status of your installation, past consumption and alerts such as excessive consumption of reactive energy, tripping of protection elements or faults in the capacitor bank.

App Wibeee CIRCUTOR

DOWNLOAD THE APP:

   

Download App Wibeee

 

Descarga App Wibeee 

Wibeee CIRCUTOR portal. Take control from your PC

Once you have installed the Wibeee consumption analyzer, it will begin to send data to the cloud server. This data will be stored there so that you can view it at any time without needing to be connected to your own unit. You can also configure the unit via the web portal, generate alarms or compare consumption data with other Wibeee analyzers that you have installed.

Wibeee CIRCUTOR Portal

Once registered on the platform, you can access the various screens for managing and comparing your consumption data.

Individual management

The web platform shows you a general summary of consumption (energy, CO2 emissions and cost in euros), with the option of creating an alarm for excessive consumption.

You can also view incremental graphics of active power, cost and emissions (as well as exterior temperature from an external server) for any period, as well as being able to export the data in Excel format and view a summary of costs for the selected period.

General summary of consumption with Wibeee

From the web portal you can also view data logs for electrical variables such as: voltage, current, apparent power, active power, reactive power, active energy, reactive energy, frequency and power factor in any period.

View data logs for electrical variables with Wibeee

Comparisons

Once the different Wibeees have been registered, you can make comparisons between them to see which is the most efficient and what level of consumption is being logged by each one. This feature is incredibly useful in installations with a similar topology as the one that manages energy the best can serve as an example for the rest, helping to change bad usage habits.

In addition, if you install a number of Wibeee analyzers in one installation, you can segment the consumption data by use (lighting, air conditioning, power etc.) and check how and when you consume energy.

Control of devices with Wibeee

 

 

 

For more information, please do not hesitate to log on free of cost to our Wibeee portal:

wibeee.circutor.com

 

 
 

Consumption analyzer WIBEEE (datasheet, manual, catalogue, etc.)

 

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Consumption analysis method for optimizing reactive compensation at MV

 

Abstract

Many times we find the question that how many reactive power to be compensated must be chosen after making a measurement with a network analyzer. This situation is crucial in determining proper reactive compensation system in MV.

The presence of harmonics in the electrical system may also influence considerably, not only upon the operation of the capacitor bank, but the entire system power quality.

This article will explain how to define the power and steps that power factor correction in MV should be, using a simple statistical method, and assess risks to the presence of harmonics in the electrical system.

Electrical measurements

We must start any analysis of reactive power compensation with a measure carried out with a network analyzer (CIR-e3, AR5L or AR6), where we record the consumption of reactive power to compensate of the installation.

We should proceed according to the following principles so that a correct data logging is achieved for further accurate analysis:

  • Period: The period for registration must be large enough to be considered as a representative and realistic sample of normal consumption of the installation. It is advisable for at least a period of one week.
  • Sampling frequency: It is recommendable to use a sampling rate as low as possible to observe more closely the fluctuations of loads. If we consider a system with little load variations one can use a higher sample rate. It is suggested to use a sampling rate between ten seconds and fifteen minutes, also considering the memory capacity of the recording data logger.
  • Seasonality: Depending on the facility activity sector, the power consumption may differ depending on the time of year, even between days along a week. It is, therefore, essential to assure the recorded values are as representative as possible of the real profile consumption of the installation.
  • Existing capacitor bank: The presence of a capacitor bank will interfere with the acquired data and distort the data collected. So, ensure that during the registration period no kind of power factor correction equipment is connected.

Analyzing the measurements

After obtaining the data, we must analyze them. We will use a very simple but yet very useful statistical method such as histograms.

A histogram is a graphical representation of a frequency distribution given values. The distribution of values is divided into intervals. These intervals could be selected as one decides, but too short or too large intervals could be impossible to analyze.

One method to determinate the optimal interval size is with the following formula [1.1]:

determinate the optimal interval size

XMAX is the maximum value, XMIN is the minimum value, and k is the number of intervals calculated according to the Velleman method, k = 2·N1/2, where N is the number of values. To avoid deviations you can delete outliers that could affect the correct approach.

Let we go through an example of analysis using reactive power histogram. We can observe the three-phase inductive reactive power consumption at a voltage of 6,6 kV in an industry, where they are paying penalties for low power factor, in Figure 1.

Three-phase Inductive reactive power consumption in kvarL

Figure 1. Three-phase Inductive reactive power consumption in kvarL

By applying formula [1.1], the proposed interval value that is got would be:

applying formula

Anyway, since usually, M.V. automatic capacitor banks are based on 100 kvar multiples, in this case we choose this interval of 100 kvar, which will better suit to the compensation requirements of this installation. Thus, the result of applying this interval is the histogram of Figure 2.

Results of histogram (100 kvarL interval)

Figure 2. Results of histogram (100 kvarL interval)

Histogram Graph (Frequencies and %Accumulative)

Figure 3. Histogram Graph (Frequencies and %Accumulative)

As you can see from the results, most of the consumption of reactive power is 1400 kvar, followed of 1000 kvar and 500 kvar. Therefore, with a configuration of steps will be 1x500 and 1x1000 kvar.

In this way, we can choose an optimized configuration of the capacitor bank that we could compensate the installation more than 98% of the time.

Presence of harmonics in the installation

Obviously this method allows us to determine the steps to form the capacitor bank, but we must not forget other factors that may influence the selection of the capacitor bank.

The presence of harmonics can affect the performance of the equipment and the power quality of the entire installation.

When we carry out inductive reactive power compensation, the incorporation of a parallel capacitor bank is logical to attenuate this demand in order to bring the demanded apparent power (kVA) nearest to the active power (kW), which is really used to carry out to the purpose it is designed for. This simple concept can be summarized as a parallel circuit with inductance (L – Transformer and Grid) and capacity (C – Capacitor bank).

If we observe the frequency response of the system, we see that for a frequency fR the impedance of the system is much greater than its normal performance.

Presence of harmonics in the installation

The existence of current with frequencies higher than the fundamental frequency at 50 or 60 Hz, mean that the resonance conditions could be complied with. This would basically cause:

  • Amplification of the distortion in voltage for the entire installation (this could affect the equipment and sensitive electrical elements).
  • Greater absorption of current by the capacitors, with their consequential overheating, reduction of their capacity and useful life, and in some cases the destruction of the capacitor.

Blow-up MV capacitor due a resonance effect

Image 1. Blow-up MV capacitor due a resonance effect

There are two methods to check or detect the risk of resonance. First method is to calculate the frequency of resonance with the following formula:

to calculate the frequency of resonance

Where SSC is the short-circuit power of the power transformer (kVA), Q is the reactive power of the capacitor bank (kvar) and f is the rated frequency of the system (50 or 60 Hz).

Then you can check if the frequency of resonance could be close or not to harmonic current presence in the installation, therefore could produce a resonance between the capacitor bank and the network.

The second method is to detect if the capacitor bank is producing or not a parallel resonance with a measurement. We just need to take measurements with and without the capacitor bank connected, and see the performance of THDU%.

measurements with and without the capacitor bank connected

If the THDU% increases so much when you connect the capacitor bank, it will means that exists an important resonance and it will damage the capacitor bank, as well as, the whole equipment connected in that installation.

The only way to avoid this risk of resonance is to install a detuned capacitor bank that reject the parallel resonance this the most common harmonics presence in the installation.

Final conclusion

A brief summary of this paper may conclude that the right choice of a capacitor bank to compensate any M.V. must take into account two essential points:

  • The accurate selection of the stages that compose the capacitor bank, trying to get the most cost-effective arrangement.
  • A thorough analysis of the need of using detuned reactors to avoid possible harmonic amplification phenomena.

 

 

Click here to download this article in PDF pdf format: en

 

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Slot harmonics in power generation systems

 

Introduction

Technicians and engineers are broadly familiar with problems caused by lack of power quality and, more specifically, harmonics.

Filtration systems reduce and mitigate the actual harmonic current consumed by the receivers but, what if the source of the power quality is the generation system?

In this article we will look at slot harmonics, and a case study of resonance with these types of harmonics that are generated.

Slot harmonics

The actual construction of the stator windings of alternating current rotating electric machines can give rise to the appearance of harmonic components in voltage known as "slot harmonics". 

The existence of uniform slots around the internal part of the stator causes regular variations of reluctance and flux over the stator surface, producing distortion of the voltage wave.

Stator with slotsInduction Motor Elements

Slot harmonics occur at frequencies determined by the space between adjacent slots. The order of the components is expressed as follows:

FN-armonicos-ranura-formula1-en

where:

υslot = order of harmonic component
S = number of stator slots
P = number of machine poles
M = whole number, normally equal to 1, with which the lowest frequency slot harmonics are produced

The main effects of slot harmonics are:

  • Induction of voltage harmonics to the electrical system, distorting the voltage wave.
  • Increase in the voltage distortion rate THDU(%)
  • Greater likelihood of resonance with capacitor banks
  • Decrease in engine efficiency (lower torque, vibrations, etc.)
  • Inadequate operation of sensitive electronic devices.

Slot harmonic resonance

In this case the industry in question has a dual power supply, consisting of a 6.5 MW, 4.16 kV/60 Hz generator and direct power supply from the electrical network through a 69 kV primary electrical network with a 9 MVA transformer and 4.16 kV/60 Hz secondary. The installation had a motor control system (SMC), which was compensated with a 50 kvar, 4.16 kV capacitor.

Simplified diagram of the electrical system and electrical measurements

problems Problems

The installation had the following problems:

  • Repeated failure of the SMC motor starter.
  • Tripping of the protections and degradation of the MV capacitors.
  • Failures in the UPS system in low voltage.
  • Damage to the electronic ballasts.
  • False heating alarms in compressors, etc.

Tests Tests

4 different tests were carried out to the motor power supply:

  • Powered from the electrical network with and without a capacitor bank.
  • Powered from the generator with and without a capacitor bank.

Table 1 summarises the main electrical parameters measured, showing that the variation of the harmonic components without (Fig. 1 and 2) or with (Fig. 3 and 4) a capacitor bank is practically the same, having at all times the correct levels.

Table 1

Table 1

FN-armonicos-ranura-fig1-4-en

Table 2 shows the performance of the system powered by the 6.5 MW generator.There is a considerable increase in the voltage distortion when the 50 kvar capacitor is connected; the increase is mainly produced in the 37th order harmonic.

Table 2

Table 2

Fig5-8

Detail of the rotor and the stator in a generator

As figures 6 and 7 without a capacitor and figures 5 and 8 with a capacity show, the harmonic distortion operating with the generator is greater compared to the distortion produced operating directly with the electrical network; the 5th and 37th order components have apparently negligible amplitudes (1.89% and 1.26% respectively).

With the capacitor bank operating, there is resonance in the 37th harmonic with its amplitude at high values (>3%).

There were failures during the test, including the false alarm in the boiler control because of voltage distortion in all the circuits powered by the generator.

This resonance is caused by the combination of short-circuit parameters in the 4.16 kV, 71230 kVA DC bus, and the size of the capacitor, 50 kVAr. The tuning frequency is expressed as follows:

Formula

where:

 n = harmonic order of resonance
Scc = Short-circuit power available in the connection point of the capacitor bank
Q = Effective power of the capacitor bank

therefore:

Formula

Fig.9

FN-armonicos-ranura-fig9-en

We also saw that the generator was 4-pole and had 72 slots in its stator, so by applying the initial formula its lowest order slot harmonics are 35 and 37, coinciding with the resonance produced in the installation, and which entailed the various underlying problems. (Fig. 9)

An interesting aspect of this test was the fact that as the load dropped to 0, the distortion of the voltage wave increased, as shown in the figure with the profile of the voltage distortion rate THD(U)%.

Conclusions

picture conclusionsIn this case, the immediate measure was to leave the 50 kVAr capacitor permanently out of service, and to consider the need to use a capacitor bank with a detuned filter, detuned to 7%. However, the presence of the 37th voltage harmonic, being a generator design flaw, cannot be eliminated, meaning that in low load periods the same false alarm was produced in the boiler control. It was therefore suggested that power should be provided through an online type UPS system in order to eliminate this component from the power supply voltage.

It is becoming more essential to use compensation units with detuned filters due to the increase in applications with electronic and power electronic devices, whose effects these days cannot be discounted.

The deployment of a monitoring system enables the diagnosis, control and efficient use of electrical energy, and to help detect any anomaly in our installation.

 

Click here to download this article in PDF pdf format: es  en  de  fr  pl  pt

 

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Energy efficiency, self-consumption and electric vehicle charging

 

The perfect formula to improve the sustainability of companies

The agreement signed in February 2014 between FEC (Future Energy Consulting Services GmbH) and CIRCUTOR to promote and develop activities related to marketing energy efficiency and solar energy solutions has begun to see results.

This first year of working together has resulted in the development of three projects that deliver the perfect combination of environmental sustainability, economic viability and social outreach for companies as varied as a car dealership and a vegetable processing and packing plant in Southern Spain.

The FEC group includes the development company PROCONSULT and the SOLAREC engineering company specialised in implementing solar energy systems. They have both worked with CIRCUTOR on the design, construction and start-up of the first three projects of a long list that will be refined in the upcoming months.


PROCONSULT's solutions for companies come together under the term SUN TOWER, which encapsulates the concepts of:

  1. Improved building energy efficiency through the implementation of an energy monitoring application with POWER STUDIO SCADA.
  2. Harnessing the building's potential for energy self-production through the installation of photovoltaic solutions like the SUN TOWER solar tracker, rooftop solar systems and CIRCUTOR's PVing Park photovoltaic canopies.
  3. Adapting the building for the arrival of electric vehicles through the installation of CIRCUTOR's RVE2-P charging points in a solar parking area.

The solution is backed by a guarantee to offer each client the best solution adapted to their consumption needs and available spaces. Mature solutions, proven technology and suppliers with financing available. This means that projects can be undertaken by companies with confidence that resulting savings will offset the investment made and that financing is guaranteed.

Energy costs currently account for a high percentage of company spending, with the added uncertainty that future instability could jeopardise competitiveness. The strength of these solutions is that they allow the building to use sunlight to generate between 30 and 50% of the energy required on-site and reduce energy requirements to a minimum with consumption monitoring that makes it possible to define actions to be implemented and quantify their results.

PV system can add around  50% the energy demand
PV system can add around
50% the energy demand

All these projects have been formalised under the heading of photovoltaic energy installations connected to the grid with zero injection of surplus energy. This formula significantly eases the administrative requirements of solar installations designed for the self-sufficiency of buildings. The system aims to reduce internal electricity consumption, achieve energy independence, and generate energy locally, not for injection into the distribution lines.

The solar production is regulated through the Dynamic Power Controller (CDP) designed by CIRCUTOR. This device sends a power modulation order to the solar system inverters so that they adapt the generated power to a maximum value that is always less than the instantaneous power demanded by the loads in real time.

The fact that self-consumption photovoltaic systems produce part of the energy required by buildings and do not inject surpluses into the grid allows government to assign them an energy savings role, facilitating their processing. Likewise, having no grid injection frees these systems from maximum installable power restrictions based on the discharge capacity of the distribution lines.


The term SUN TOWER broadly encompasses the implementation of PowerStudioScada energy management software, solar tracker systems, rooftop systems and CIRCUTOR's PVing Park photovoltaic canopies, as well as RVE2-P quick charging points for electric vehicles.

The term SUN TOWER broadly encompasses the implementation of PowerStudioScada energy management software, solar tracker systems, rooftop systems and CIRCUTOR's PVing Park photovoltaic canopies, as well as RVE2-P quick charging points for electric vehicles.


Solar photovoltaic systems for selfconsumption with zero injection into the grid are supported by a growing number of governments that provide for legal installations in a simple, quick and economical way without the need for prior approval processes with the utility companies.


The integration of all the activities from the various projects into a single platform through the POWER STUDIO SCADA monitoring and supervision application allows you to not only quantify the solar production of each of the systems, but also tracks the evolving consumption of each productive section of a company as well as the impact of the different energy savings actions that have been implemented.

The integration of all the activities from the various projects into a single platform through the POWER STUDIO SCADA monitoring and supervision application allows you to not only quantify the solar production of each of the systems, but also tracks the evolving consumption of each productive section of a company as well as the impact of the different energy savings actions that have been implemented.


The SCADA application enables SOLAREC to perform corrective and preventive maintenance in order to guarantee the results of each of the projects as well as design future energy strategies for each user.

By performing simulations to generate the energy bill and calculate the impact of the savings provided by solar production, you can verify the profitability of investments as well as the specific energy costs of each business process in every industry. The design and implementation of the POWER STUDIO application as well as the electrical installations required for these projects have been carried out by CIRCUTOR's expert engineering and installations company, Aseprel, SL (www.aseprel.es)

The installation of the RVE2-P electric vehicle charging points in the projects not only conveys an image of modernity and environmental commitment to employees and customers of companies, but also serves to adapt the infrastructure to new transitional energy regulations centred on mobility, like the recently-approved ITC-BT-52 of the Low Voltage Electrotechnical Regulation.

The 246 kW of rated power installed in the three completed projects have an annual production potential of nearly 400,000 kWh. This would mean approximate energy savings of €80,000/year and a reduction of 90 tonnes of greenhouse gas emissions into the atmosphere each year. Moreover, the three QUICK charging points for electric vehicles will provide the basis for a provincial infrastructure that will enable the development of these vehicles, resulting in greater cost reductions and emissions in the years to come.

These projects have undoubtedly positioned the companies of the FEC Services group at the forefront of solar energy technology in buildings and as a sector leader in Southern Spain. This has paved the way for the group to win more projects and expand its activity to other areas with identical needs and great potential for savings.

Based on the experience gained in these first projects, now in operation, FEC Services and CIRCUTOR are working to adapt this partnership scheme to Latin American countries where there is a great need to provide solutions in energy efficiency, self-consumption of solar energy and the integration of electric mobility. The first projects are underway in Mexico and Chile.

For contact details and more information: www.proconsult.es


Information on completed projects:

  • „„ Client: Premium Almería
  • „„ Actions taken:
    • PowerStudioScada software application
    • Installation of a SUN TOWER solar tracker
    • Installation of PVing PARKS photovoltaic canopy with 4 parking spaces
    • Installation of RVE2-P electric vehicle charging point.
  • „„Photovoltaic power installed: 21 kW
  • „„Roll-out: June, 2014
  • „„Location: Huércal, Almeria (Spain)
Premium Almería
  • „„ Client: Frutas Escobi
  • „„ Actions taken:
    • PowerStudioScada software application
    • Installation of a SUN TOWER solar tracker
    • Installation of PVing PARKS photovoltaic canopy with 8 parking spaces
    • Installation of rooftop solar system
    • Installation of RVE2-P electric vehicle charging point.
  • „„Photovoltaic power installed: 60 kW
  • „„Roll-out: September, 2014
  • „„Location: El Ejido, Almería (Spain)
Frutas Escobi
  • „„ Client: Hortofrutícola Las Norias
  • „„ Actions taken:
    • PowerStudioScada software application
    • Installation of a SUN TOWER solar tracker
    • Installation of PVing PARKS photovoltaic canopy with 54 parking spaces
    • Installation of rooftop solar system
    • Installation of RVE2-P electric vehicle charging point
  • „„Photovoltaic power installed: 165 kW
  • „„Roll-out: January 2015
  • „„Location: El Ejido, Almería (Spain)
Hortofrutícola Las Norias

 

 

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More information about Renewable energies

 

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How can the correct EnPIs be chosen?

 

Once the goals have been established after an energy audit, the way in which the goals of an energy efficiency plan or plan for the implementation of the ISO 50001 will be achieved must be studied.

EnPIs (Energy Performance Indicators) are indicators that can be used to measure, assess and control the most relevant aspects of the installation, which can affect the achievement of goals.

EnPIs must be jointly defined with the supervisors of each area or department in which these can have an impact when an energy efficiency project is commissioned or during the continuous improvement and monitoring process.

EnPIs must be of the most suitable type for each specific area, process or organisation and adapted in each case. EnPIs are established with the purpose of being specific, measurable, achievable, relevant and time-bound (SMART), so they can be as stable and specific as possible over time.

Basically, we must answer the following questions:

  • What will we measure?
  • What ratio will we use?
  • How will we measure it?
  • How can we achieve the goal?
  • How important is it for the company?
  • How long does it take to achieve the goal?

Each company or business is different, so a copy-paste of the same EnPi in each energy efficiency project is simply not enough.

Now think about it - What will your EnPI be? 

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CVM-NET 4+. Complies with the Energy Efficiency standards

Current situation

The current market standards establish the guidelines for the implementation of new systems that can manage consumption data, with the purpose of knowing how and when our installations are consuming energy.

The new European Directive 27/2012 EU will come into force during 2015, establishing a national objective for improving the efficiency of large companies. This obliges installation managers to have verifiable and quantifiable data about the different energy uses of their installations.

This information will be vital for achieving a better understanding of how each installation behaves and for controlling such behaviour, since one of the key objectives is to achieve a 20% reduction in the energy consumption of these installations.

These companies are obliged to perform external audits to corroborate the compliance of their systems with the new standards. Therefore, these companies have the option to install their own Energy Management System (EMS) as an alternative to performing an external audit.

In addition, some standards, such as ISO 50001, also applicable to SMEs, already recommend these types of systems with the purpose of measuring and quantifying the consumption of energy per zone and type of use, which are useful for the continuous improvement of different energy processes and systems.

When addressing how the system must be installed, the features of electrical installations are not always constant, i.e., many different single-phase channels often exist in switchboards. To this end, units that can measure different types of lines in a reduced space must be installed, avoiding the installation of new measurement sub-panels.

This is quite a critical point, since significant investment will be required to adapt the measurement system if the consumption analyzers cannot be installed in existing panels.


Solution

The new CVM-NET4+ multi-channel power analyzer has been specially designed for multi-channel applications in existing panels, providing information on over 750 electrical variables for the complete management of installations.

Read about its advantages:

 

Less space - Saves time - Reduces costs
CVM-NET4+
  • 4 to 12 analyzers in a single unit
  • Simultaneous measurement of single and three-phase lines
  • Data centralised in a single measuring point
  • Use of MC1 and/or MC3 efficient transformers.

CVM-NET 4+

 

CVM-NET4+-MC-RS485-C4 is a multi-channel power analyzer with compact dimensions that can measure up to 750 electrical variables with a centralised approach.

Its versatile configuration options enable you to take measurements from single-phase systems, three-phase systems or a combination of both.

The unit features a single threephase voltage input, saving time during its installation, in addition to combining up to 12 configurable current measurement channels, through the MC efficient current transformers.

The data gathered by the analyzer is transmitted via the RS-485 communications bus with the Modbus/RTU protocol to the supervision SCADA (PowerStudio / PowerStudio Scada / PowerStudio Scada Deluxe).

CVM-NET4+
  • Over 750 electrical parameters.
  • DIN Rail format.
  • Size of only 6 modules.
  • Reads 12 single-phase channels or a combination of these channels with three-phase current channels.
  • Current measurement with efficient transformers of the MC series (.../250 mA).
  • RS-485 Communications (Modbus RTU).
  • 4 programmable digital outputs.
  • Sealable.
  • Compatible with PowerStudio / PowerStudio Scada / PowerStudio Scada Deluxe software.

1. Installation

Saves space

Space restrictions often arise due to the large amount of units and wiring. Therefore, CVM-NET4+ features a connection mounted on a DIN rail, with a 6-module housing, which can be adapted to any type of electric panel.

Saves space

Saves time

Thanks to its design, CVM-NET4+ features a single voltage measurement connection, avoiding the connection of 12 lines at the same time, i.e., it is the ideal measurement solution for switchboards.

The use of efficient transformers of the MC1/MC3 series helps quickly connect the current channels, in addition to achieving a lower consumption than conventional transformers.

Saves time

Reduces costs

Save money by installing a single unit instead of up to 12 singlephase analyzers, 4 three-phase analyzers or a combination of both types of analyzer. CVM-NET4+ offers the same performance features in a single unit. 

In addition, you will be able to send information via Modbus RTU to the PowerStudio Scada electric energy management and monitoring software with a single communication cable (RS-485).

Reduces costs


2. Configuration

With a size of only 6 modules, the unit can combine 12 measurement channels (single or three-phase), offering a highly versatile unit. Therefore, the consumption of different lines can be measured, grouping this data through the PowerStudio, PowerStudio Scada or PowerStudio Scada Deluxe platforms. 

With such a configuration, detailed consumption reports can be prepared by zone and type of use, creating a system that is adapted to the new requirements and standards, such as the EN 16247 Standard or the new European Directive 2012/27/EU.

In addition, the unit features 4 relay outputs, so the CVM-NET4+ can control loads or alarms to improve the management of the installation. 

The versatility of the unit offers multiple configurations in a single unit:

MULTIPLE CONFIGURATIONS

Application examples:

Repair shops

Repair shops

Services

Services

Restaurants

Restaurants

Offices

Offices


Products associated with CVM NET 4 +

 PowerStudio Scada and PowerStudio Deluxe electric energy management and monitoring software Efficient three-phase measurement transformers, specially designed for modular electric panels 

Software

PowerStudio Scada and PowerStudio Deluxe electric energy management and monitoring software 

For some time now, CIRCUTOR has been developing robust and reliable tools that transfer electrical parameter or consumption information from remote measuring units or laptop devices to a centralised system where the data gathered can be checked and processed. This tool is called PowerStudio Scada and it covers all the necessary options for analysing the data gathered and taking decisions to make your installations energy efficient.

Efficient three-phase measurement transformers, specially designed for modular electric panels

The MC measurement system offers significant advantages to professionals during the power analyzer and meter implementation and installation phase in electric panels.

The MC3 system is composed of three efficient transformers in a compact arrangement; its dimensions make it a simple and innovating system for 63A, 125A and 250A panels.

The MC1 system allows line extensions in electric panels, by simply changing the transformer secondary, as it is a compact multi-range system.


Application

PUE Efficiency Calculation Scale

CIRCUTOR's headquarters are located in Viladecavalls (Barcelona) and they are a good example of the implementation of an Energy Management System (EMS).

We can classify the different types of consumption by zone and type of use thanks to the measurements taken by units such as the CVM-NET4+. Therefore, the task of classifying the types of consumption is relatively simple, always taking into account where, how and when electrical energy is consumed, helping take decisions associated with the improvement of electrical energy efficiency.

The installation is controlled with PowerStudio Scada energy management software, which can monitor data, produce graphics, tables, Scada screens, reports and alarms, recording all parameters in a database to guarantee system traceability.

In addition, another good example of where the application is used are the data processing centres (DPCs) in which the PUE (Power Usage Effectiveness) is calculated as a variable that measures the efficiency of data centres.

To do so, the three-phase load measurements, such as the input power of the server room, UPS and air conditioning system power, must be combined with the single-phase loads, such as the consumption of the servers at the UPS output. Therefore, data associated with the PUE and UPS losses is gathered, i.e., data on the efficiency of the system.

Energy management system

 

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Datasheet: CVM-NET4+-MC-RS485-C4. Multi-channel power analyzer

 

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Efficient management of telecommunications systems

 

Key aspects for telecommunications companies

Telecommunications companies need to adapt their traditional management systems to other more robust and efficient ones. Nowadays, on-site management in the different centres is no longer sufficient. Success lies in automating the different control systems to obtain high quality installations that are reliable and available.

The most critical point to bear in mind in telecommunications installations is ensuring supply continuity, because any incident of this type leads to serious complaints from users, and also requires human presence to fix the problem. However, another important aspect is controlling energy in a way that managers can remotely monitor and control each station to take immediate actions.

4 key objectives

As a reference in the electrical energy efficiency sector, CIRCUTOR offers telecommunications service companies a wide range of devices for successfully achieving the efficient control of their installations, both remote stations and data processing centres.

There are several objectives that have to be borne in mind to achieve this, for instance:

  1. Supply continuity
    Guaranteeing supply continuity with protection and earth leakage self-reclosing systems.
  2. Energy efficiency management
    Guaranteeing the installation's energy efficiency (control and reduction of consumption).
  3. Alarm management
    Efficiently managing alarms (intruder detection, beacons, unwanted tripping, etc.)
  4. Management system creation
    Guaranteeing a robust global management system of the different centres (centralised control).

How to meet the 4 objectives


1. Supply continuity 

Ensuring supply continuity is the most critical aspect in these types of installations. Any electrical outage leads to enormous economic losses and also requires human intervention to find a solution to the problem.

The solution for mitigating this problem is the installation of CIRCUTOR's circuit breakers with ultra-immunised earth leakage protection together with automatic self-reclosing devices such RECmax.

The installation of ultra-immunised earth leakage relays guarantees correct actuation of the protections, which avoids possible unwanted tripping caused by malfunctions. Furthermore, the existence of devices with DC supply, such as UPS's, requires the installation of type B earth leakage relays to monitor and protect the installation. Type B devices ensure the correct operation when there is a leakage current because they are specially designed to actuate when there is any fault with DC and AC component.
In turn, the self-reclosing system ensures supply continuity during a temporary fault, without the need for external intervention.

It should be pointed out that those devices must be equipped with communications capacity for carrying out actions via remote control, monitoring the status of the protections on real time and acting accordingly when necessary for maintenance or prevention.

Installing control devices for the external beacons, such as TB-3, is recommended as an additional element. These are designed to activate a burnt-out light alarm and can be integrated in management and control system.

Article-telecom-continuidad-en

RECmax
Earth leakage circuit breaker with self-reclosing system and display (LCD)

The RECmax LPd connected to the WGC / WGS toroidal transformers ensure earth leakage and circuit breaker protection with self-reclosing after an earth leakage, overload or short-circuit trip.
It is a good solution for those infrastructures that are hard to control and monitor because of their location in the following control boards:

  • Phone systems
  • DTT systems
  • IT systems, UPS

RECmax. Earth leakage circuit breaker with self-reclosing system and display (LCD)

Type B
Full range of Type B earth leakage protection and monitoring devices

CIRCUTOR's range of Type B earth leakage protection units covers all the protection levels in your installation.

Type B. Full range of Type B earth leakage protection and monitoring devices


2. Energy efficiency management

Every system aimed at electrical energy efficiency has to be equipped with devices that can log the electrical magnitudes in order to determine where and how energy is consumed. An analysis is done after said data is gathered to detect inefficiencies and take very specific corrective actions to achieve a higher energy efficiency.
Using CVM, electrical power analyzers, makes possible logging, monitoring and the management of electrical consumption and magnitudes in different centres.
For correct management, the measurements must be segmented for measuring at the installation mains and directly on the loads or units.

  • Mains monitoring 

Capacitor bank Optim P&P. Savings on the electricity bill as a result of power factor correction

Monitoring the consumption at the main will log how much energy the centre consumes and whether the contracted power with the utility is adjusted to real usage or not. Consequently, the possibility of reducing the contracted power is the first piece of data to be assessed.

Another important advantage is that self-billing is possible because real-time energy data is always available, and so the manager can anticipate receipt of the official invoice of the utility. Thanks to this, the accounting department will be able to accurately estimate payments

The reactive energy penalties cannot be ignored, as they may notably increase the electricity bill. This is why analyzers are a basic element for detecting the need for a capacitor bank installation to avoid unexpected penalties in the monthly bill.

Installing an Optim P&P (Plug&Play) series capacitor bank will avoid reactive energy penalties in the centre, which will lower the electricity bill.

  • Monitoring the units

In general, it is possible to estimate 100% of the total energy consumed in stations or data processing centres, 60% of which would be electricity consumed by infrastructure and the remaining 40% by cooling.

  • Cooling

This shows that controlling cooling has an extremely important effect on the electricity bill. Temperature and humidity sensors have to be installed for correct management of the air conditioning systems, so as to be able to activate the fan and air-conditioning system.

The key is using the digital outputs of the CIRCUTOR electrical power analyzers CVM or EDS energy managers, depending on the environmental features, for activating/deactivating the fans. When management with fans does not suffice, the air-conditioning systems must be activated until the programmed setpoint is reached. This efficient and rational use of cooling systems enables important savings in this environment which, as we mentioned, makes up 40% of the total.

  • Lighting

A global vision of the system cannot overlook lighting consumption management. The analysis of these consumptions is important to be able to estimate future energy savings that could be achieved by changing over to more efficient lighting systems. Historical data can be used for comparing energy savings in each centre based on the type of lighting system installed.

  • IT devices

The European Commission also has a code of conduct for reducing the impact of data centres' growing energy consumption.

We can calculate the energy efficiency of any production system by comparing the useful energy with the total energy needed by the system. With this information and knowing where the inefficiencies are, we can achieve substantial savings and more environmentally-friendly operations.

The energy factor is so critical in data processing centres that it has its own indicator: the Power Usage Effectiveness (PUE) defined by the Standard issued by The Green Grid, a global environmental agency comprised of over 175 internationally renowned companies.

The European Commission also has a code of conduct for reducing the impact of data centres' growing energy consumption.

The Commission has established the specific formula for calculating the PUE:

PUE = Total energy supplied / Energy for IT equipment

Moreover, the Environmental Protection Agency of the United States (EPA) provides the following PUE values as a reference:

Companies like Google have gotten the average PUE of their DPCs down to 1.22, and sometimes as low as 1.15.

      • History log 2.0
      • Current trend 1.9
      • Optimised operations 1.7
      • Best practices 1.3
      • State-of-the-art 1.2

Therefore, one of the keys to success in an energy improvement project lies in measuring the consumption of each device (air conditioning, communication units, UPS power supply, lighting, temperature, etc.) with electrical power analyzers CVM, in order to take appropriate action and achieve a higher performance.


3. Alarm management

Any time there is an alarm in a centre or station, it may involve the intervention by maintenance staff. There has to be a fast, safe and effective alarm system to be able to react on time and minimise operating costs. Telecommunications companies usually have their own alarm systems that send alerts via SNMP messages (Simple Network Management Protocol), which means that any system management has to be able to send different programmed alarms directly to the server.

The energy data server EDS, responsible of managing the devices installed in the centre, will automatically send any alarm to the telecom SNMP main server. So immediately, the device will perform the appropriate action to mitigate the impact, whether acting directly or via remote management.

CIRCUTOR's solution with SCADA system


4. Management system creation

Once the devices necessary for locally controlling the centre or station have been determined, the global management infrastructure must be designed. The infrastructure must have the capacity to interact with each centre and, in turn, automatically report the stored information to provide a global view of the system.

The information has to cascade from the source down to the control centre following a redundant data structure.

The installation's architecture would be designed in three blocks

The installation's architecture would be designed in three blocks:

  • Local management

As explained in the previous points, different types of devices need to be chosen in order to achieve higher effectiveness in the electric energy management environment. Once the units have been chosen, they have to be connected to an energy manager equipped with communications and a database, such as the CIRCUTOR Efficiency data server (EDS).

The EDS device uses Scada software for monitoring and storing in real time the different devices variables, and for the management of inputs/outputs for controlling the station. It also uses Ethernet or 3G communications (depending on the model) for connecting to an intermediate management system. 

It should be noted that the EDS has the capacity to manage any alarm that appears in the centre, sending messages via SNMP to the telecommunications company's central control server.

Local management system

  • Intermediate management

Data transmission and treatment is one of the most important aspects that need to be defined. For the system to work properly, each centre or station has to be able to connect to a higher system with the capacity to centralise the control of the different centres. This system automatically requests all the data stored in the EDS managers, and also displays/manages the status of each device.

To do so, each local centre sends data to an intermediate server with PowerStudio Scada energy analysis software installed for centralising the control of each associated local centre.

The PowerStudio Scada platform receives and stores all the regional information and subsequently sends it to the management system in the control centre. Therefore, a large amount of information is sectored without saturating the central server, which makes subsequent management more efficient whilst ensuring data redundancy, as the data is stored in the EDS manager and the PowerStudio Scada system.

The associated devices in each centre or station can be remotely configured, controlled and monitored using the Scada application.

Intermediate management system

  • Management Control Centre

Managing the entire communications infrastructure must be handled from a central server to obtain a global vision of the installations. 

This requires installing a server that uses the PowerStudio Scada Deluxe platform. This global platform will add the different PowerStudio Scada installed in intermediate management sites so that it can feed from their databases and centralise the management of the entire infrastructure.

In other words, the central application will be able to see the different intermediate servers, which in turn will allow the display and control of the local system controlled by different EDS' with their own management and control devices.

After the central platform has been set up, data will be saved automatically in its server, and the entire database can be transmitted to other systems that are already installed. The application enables sending data directly from SQL, web service, XML (using a conversion module for this format).

As mentioned above, the EDS units will also be able send alarms directly to the telecommunication company's central alarm server via SNMP, perfectly integrating these devices in the existing infrastructure.

Control centre architecture


PowerStudio Scada is the energy management software from CIRCUTORPowerStudio Scada is the energy management software from CIRCUTOR

PowerStudio Scada For the INTERMEDIATE CENTRES control

PowerStudio Scada

  • Real-time display of variables
  • Creation of databases
  • Graphical representation
  • Representation with data tables
  • Creation of SCADA screens
  • Creation of personalised reports
  • Sending and reporting alarms (incidents)
  • XML server
  • Exporting data (.txt, and .cvs)

Application examples of the Scada PowerStudio/Deluxe software

Application examples of the Scada PowerStudio/Deluxe software

PowerStudio Scada DELUXE for the management from the main CONTROL CENTRE

PowerStudio Scada DELUXE

Power Studio Scada Deluxe + :

  • Modbus generic driver (can be used to add any unit in the market with the Modbus protocol)
  • OPC Client (Serves data to OPC systems)
  • Multipoint PSS (Adds other PSS to a single control and management system)

SQL DATA EXPORT

  • Converts the database to SQL and automatically
    exports it to third-party systems

WEEKLY PUE CALCULATION REPORT

Example of the system's global architecture

1. Local management
EDS + control and management devices.

2. Intermediate management
Servers with PowerStudio Scada software for data management and controlling level Œ(1) local installations Œ

3. Management from the Control Centre
Central server with PowerStudio Scada Deluxe for controlling intermediate level management (2) and level local management systems (1).
Database management system for SQL, XML or WEB.
System for the management of SNMP alarms coming from (1) EDS devices.

Example of the system's global architecture

Conclusions

As a company specialised in the energy efficiency sector, CIRCUTOR provides telecommunications companies the architecture they need for the management and control of all their centres or stations, and offers a large portfolio of devices, ALL of them dedicated to improving energy efficiency.

Summarizing, with the installation of the proposed system, telecommunications companies will be able to improve the following areas:

  • Security in supply continuity.
  • Correct management and reduced consumption of cooling systems.
  • Reduced electrical costs through measurements and preventive actions of the different loads.
  • Reduced electricity costs through power factor correction.
  • Improved power usage effectiveness (PUE) indicator, adapted to the levels recommended by the European Commission.
  • Critical alarm control.
  • Self-billing to be able to anticipate receipt of the utility bill„„
  • Global and centralised management of the communication infrastructures (remote stations or data processing centres).

 

 

Click here to download this article in pdf PDF formates  en  de  fr  pl  pt

 
 

More information about Earth leakage protection and self-reclosing

 
 

More information about Overcurrent and earth leakage protection and self-reclosing

 
 

More information about Overcurrent protection and self-reclosing

 

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Contact

CIRCUTOR, SA
Vial Sant Jordi s/n, 08232
Viladecavalls (Barcelona) Spain
Tel: (+34) 93 745 29 00
Fax (+34) 93 745 29 14

Technical Support

(+34) 93 745 29 19

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