Technical paper

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Document title Document type Document Date Add Download
Matpost 2011-Benefits of the functional approach in Standardization activity
NRJED315649EN
Functionnal approach leads to a variety of technical solutions and opens the door to innovation. IEC, main international standardization frame for electrical switchgear, applies such approach based...
Technical paper 22/04/2015 Add to my Documents
CICED 2012-The role of standards as enabler of optimized MV Switchgear design
NRJED315648EN
Electrotechnical switchgear used for network operation has high stakes in term of safety and power availability. For this purpose, it is essential they rely on high level standards such as IEC,...
Technical paper 22/04/2015 Add to my Documents
Matpost 2011-LPCT Allows rationalization of the protection chain
NRJED315647EN
Traditionally the current measurement in the MV systems has been made with Current Transformers (CTs). The use of new technology called Low Power Current Transformer (LPCT) allows an evolution in...
Technical paper 22/04/2015 Add to my Documents
CICED 2014-Is overvoltage protection useful in MV distribution equipment?
NRJED315646EN
Relevancy of overvoltage protection on MV networks is discussed according to the network structure and the switching equipment installed. Over-voltages can be generated by natural phenomena like...
Technical paper 22/04/2015 Add to my Documents
CICED 2014-Time to reconsider VT's implementation for a better reliability
NRJED315645 EN
In the smart grid deployment, more and more voltage transformers (VTs) are used to provide voltage measurements, for example for power measurement. In traditional switchboards, VTs were identified...
Technical paper 22/04/2015 Add to my Documents
ISBN 2008-2. Compliance with insulation coordination
NRJED315642EN
The behaviour under lightning is simulated numerically for vacuum switch-disconnectors (standard deviation StD of 16%) and gas switch-disconnectors (StD of 5%) in a critical case of a MV/LV...
Technical paper 22/04/2015 Add to my Documents
CIGRE 2011 - Recovery and regeneration of SF6 at switchgear end of life is now a mastered
NRJED315644EN
Sulphur Hexafluoride (SF6) gas has been used since approximately 1960 in electrical equipment for energy transmission and distribution at rated voltages above 1000 V. It is recognized as an ideal...
Technical paper 22/04/2015 Add to my Documents
CICED 2008-Impact of Vacuum Switch-disconnectors
NRJED315641EN
Using vacuum technology in 100% of distribution switchgears will increase the number of vacuum interrupters in the network by a factor of 20. Here a statistical analysis is used to evaluate the...
Technical paper 22/04/2015 Add to my Documents
CICED 2008 - Capacitor Bank Switching with Vacuum Circuit Breakers
NRJED315643EN
After interruption of a capacitive current sometimes Non Sustained Disruptive Discharges (NSDD’s) are observed when using vacuum circuit breakers. According to network calculations, NSDD’s...
Technical paper 22/04/2015 Add to my Documents
PCIC 2015- Arc Flash vs arc resistant
NRJED315651EN
"Arc flash" and "arc resistant" terms became common in the industry when speaking about the possible consequences of an arcing fault on an electrical installation or within an electrical...
Technical paper 22/04/2015 Add to my Documents
CIRED 2013-Impact of medium voltage switchgear technology on operating modes in the network
NRJED315635EN
The metal enclosed switchgear suitable for installation in MV / LV public distribution substations or private customer substations are key elements to ensure continuity of service in electricity...
Technical paper 22/04/2015 Add to my Documents
Knowing status of an Earthing Switch in MV Switchgear, contact visibility or positive mechanical indication?
NRJED315637EN
Safety of personnel operating or maintaining MV switchgear is crucial. When work needs to be done on an electrical installation, the equipment must be earthed, since earthing is what ensures the...
Technical paper 22/04/2015 Add to my Documents
2SIS technology in MV Switchgear improves harsh environment and drastically reduces internal arc probability (CICED 2014-FP 0314)
NRJED315639EN
For efficient smartgrid deployment, availability of MV networks is of high importance. MV switchgear play a key role for this purpose and more often, harsh environment withstand is required, thus...
Technical paper 16/04/2015 Add to my Documents
Time to reconsider VT's implementation for a better reliability
NRJED315645EN
In the smart grid deployment, more and more voltage transformers (VTs) are used to provide voltage measurements, for example for power measurement. In traditional switchboards, VTs were...
Technical paper 23/03/2015 Add to my Documents
Technical paper 15/11/2008 Add to my Documents
CT 214 - Energy efficiency: benefits of variable speed control in pumps, fans and compressors
ECT214
A large proportion of the electricity produced around the world is used to raise, move or pressurise liquids and gases with machines such as pumps, fans and compressors. Given the increasing...
Technical paper 15/05/2008 Add to my Documents
The neutral: A live and unique conductor
ECT212
Paradoxically, although the neutral conductor is a live conductor, current should never be allowed to circulate in it. Nevertheless, there has been renewed interest in the neutral conductor in...
Technical paper 15/06/2004 Add to my Documents
Calculations for LV and HV networks
ECT213
This Cahier Technique publication is intended to provide a general overview of the main electrotechnical calculations carried out in engineering studies on electrical systems at all voltage levels....
Technical paper 01/12/2004 Add to my Documents
Electronic starters and variable speed drives
ECT208
The most common way of starting asynchronous motors is directly on the line supply. This technique is often suitable for a wide variety of machines. However, it sometimes brings with it...
Technical paper 11/01/2003 Add to my Documents
Electric motors ... and how to improve their control and protection
ECT207
Nowadays, apart from lighting devices, electric motors represent the largest loads in industry and commercial installations. Their function, to convert electrical energy into mechanical energy,...
Technical paper 01/10/2004 Add to my Documents