November, 11-15, 2025, Eilat, Israel
Archive - Electricity 2017 Archive - Electricity
TPM Seat 1
Quality and reliability of electricity - Power Quality & Reliability
Thursday | 9.11.2017 | 14:00
TPM 1.1
Electrical quality management or analysis
Amir Broshi
SATEC
Israel
Holds a BSc in Electrical Engineering (cum laude) from the Technion in Haifa and an MBA from the University of Derby, England. Since 1987, Amir has held a variety of positions in the fields of smart grid, electrical quality and power engineering. Amir served as a research and development engineer in the Communications and Electronics Corps as part of the Academic Reserve and at Elspec Engineering. After 10 years in the field of R&D, he moved into the field of marketing and business development at Alspak Engineering, PowerSciences, and since 2010 has served as VP of Business Development at Cytech. In 2009 he founded the power quality portal PowerQualityDoctor.com which he manages to this day. As part of his work at Elspec, he patented an algorithm for compressing and restoring electricity data.
Summary
In the past, the ISO 9001 standard used quality control - that is, to check what is quality and what is not; Then quality assurance - a process that plans quality delivery; And today the standard defines quality management - a comprehensive approach aimed at quality delivery.
The accepted approach to electricity quality is to analyze problems or deviations from the standard, similar to quality control. The article will review the technical and economic benefits of electricity quality management and the tools available to engineers, testers and consumers (manufacturer / consumer) for achieving these benefits.
TPM 1.2
Selectivity and advanced functions in low voltage circuit breakers, which complement the need for perfect protection for the facility
Sharon Kabir
Kahane group
Israel
Mr. Kabir Sharon has worked for the Shlomo Kahana Group for about 10 years and serves as the technical director of the low voltage division.
Sharon has 25 years of experience in the field of electricity. Sharon began his career as a foreman for 5 years at a contracting company. And then about 10 years worked in electrical equipment and control and food factory.
Today, Sharon handles consulting engineers and design firms. From characterizing equipment for projects through accompanying the contractors / board manufacturers to implementing and running the equipment at the customer's site.
In addition, Sharon is responsible for the entire issue of technical service for the group's customers, laboratory, handling of air circuit breakers, training, etc.
The professional training is provided by Sharon in the various factories abroad and, among other things, carries special certification certificates.
Summary
One of the techniques for ensuring supply reliability is to perform compatibility and direct defenses between the protection units of the circuit breakers. This method is commonly known as "selectivity" or interoperability.
There are 4 known and useful methods of selectivity that meet most of the requirements in an electrical installation:
Current selectivity - for very low current values. The disconnection characteristics cannot be changed or affected
Time selectivity - usually in air switches by staying between switches
Selectivity in energy - NHUGS, for high currents beyond the values of the direction of the protection units. The data appear in tables published by the manufacturer.
Logical selectivity (ZSI) - greatly improves disconnection times and comes as an addition to time selectivity.
This type prevents heavy damage to the electrical panels and allows selectivity to be made between identical circuit breakers with the same FRAME.
Sometimes we encounter situations that cannot be solved by the above methods.
In this article, we will present new solutions that exist in air circuit breakers for MN that complement the need for perfect protection for the facility.
Dual setting - a double set of direction values. For circuit breakers that work with both generator and power company
Double G - Dual protection against short currents to the ground when feeding to the circuit breaker and exiting the circuit breaker.
In the case of a short circuit in the supply to the circuit breaker, selectivity in the face of high voltage will be possible (circuit breaker MG)
D - Directional Protection - Directional defenses will allow defenses to be calibrated Depending on the direction of energy flow. And protection of transformer lines connected in parallel will be possible.
EFDP - Protection unit for molded circuit breakers - short-circuit detection and micro-second response. Which includes a protection option for facilities fed from 2 places
IEC61850 - a new protocol in low voltage circuit breakers that allows connection to a network of MG arrays
S750 - MAZ for low selectivity - World patent!
TPM 1.3
Is the quality of the electricity the cause of the involuntary functioning of electrical equipment
Zohar Winboim
Zohar Winboim Electrical Engineering
Israel
Zohar, a graduate of electrical engineering at the Technion since 1982, graduated with a degree in systems engineering from Tel Aviv University in 1991, is an examining engineer. , From the characterization stage, development, experiments and ending with solutions for their maintenance.
In early 2003 he founded Weinbaum Electrical Engineering and since 2010 has served as a consultant to the Electricity Authority on electrical quality issues.
Zohar is a member of the engineering session of the Association of Electrical Engineers, a lecturer on electrical quality and power factor correction on their various aspects, as well as a member of the Electricity Department and serves as the forum's vice chairman and member of technical committees and experts at the Standards Institute.
Summary
The tendency of professionals with an emphasis on electricians is to determine that harmonies are the causes of equipment failure such as accelerated wear of lighting fixtures or phenomena in the electrical circuit (involuntary action of electrical protections) that they can not explain or address by the means at their disposal.
If in the previous decade we talked about the fact that in about 80% of cases they are right, then today with the accumulated experience, the correctness of this diagnosis has dropped below 60%.
As part of the lecture, we discussed three cases in which electrical protections were activated and the engineers who dealt with the issue came to the conclusion that these were current harmonies and asked for our opinion on the subject.
TPM 1.4
Phase Voltage Fluctuations as an Electric Power Quality Index and their Influence on Some Voltage Parameters in Distribution Electrical Networks
Abstract
The values of electrical powers in the load major nodes of electrical systems vary with time. There are known "slow" and "fast" changes of active power consumptions. "Fast" changes the active power consumption by rapid variable loads on the one hand lead to the appearance of electromagnetic transients, which correspond to voltage phase fluctuations in the power network nodes, where the loads under consideration are connected. On the other hand, changes in the consumption of active power lead to the appearance of electromechanical transients in the power plant turbine-generator blocks of power systems that supply the power consumers under consideration. As a result, this leads to more or less changes in the voltage frequency in the power system electrical networks as a whole. Thus, in the load major nodes of electrical systems with rapid variable loads, "rapid" changes in the active power consumption lead to simultaneous fluctuations of the voltage phase and frequency. Fluctuations of the phase or instantaneous voltage frequency characterize the electric power quality (EPQ) of this voltage in the power supply network. Therefore, all the problems associated with voltage phase fluctuations can be belonged to the EPQ problems.
The investigations of the voltage phase fluctuation influences on such voltage parameters in power supply networks as the duration of the voltage period, the magnitude of its effective value in different cases depending on the duration of the measurement period, and some others are carried out. The conditions under which the corresponding measurement errors can be neglected and in which cases they must be taken into account are revealed.
Yair Hemo
IEC
Israel
Employee of electricity company.
Practical Engineer Electrical Command and Control.
High voltage electrical and electronics engineer.
And I graduated with a master's degree in high current electrical engineering in a thesis track at Ariel University.
TPM 1.5
Thermal Design of APFC Panels
Abstract
The life of the power capacitors and other components in APFC panels depend very much on the operating temperature. In panels with detuned harmonic filter reactors and thyristor switches, the chances of elevated temperature are high, as these components generate relatively more heat. Hence it is necessary that the design should be such that the temperature should not increase beyond certain limit. This paper briefs some guidelines about the thermal design of APFC panels and thereby dissipating the generated heat effectively.
For any panel, the temperature rise can be reduced by the following three ways:
Operating at lower ambient temperature
Using devices with lower power loss
Dissipating the excess heat, so that temperature rise is controlled
There is minimal control over the first two conditions. But the third condition completely depends on the design of the panel. By offering effective cooling methods, the excess heat generated by the equipments can be dissipated.
Below are the methods by which the thermal impedance can be minimized.
Capacitors should be kept below the reactors, which are the major heat sources. This is because the reactors would increase the ambient temperature around the capacitors and the elevated temperature would reduce the life of the capacitors.
The reactors should be mounted in the zigzag position (as shown in the figure below), in order to ensure better heat flow. If the reactors are kept one above other, the bottom most reactors would heat up the other reactors that are mounted above them.
Thyristor switching modules should be mounted vertically (position of heat sink should be parallel to the air flow direction) and in zigzag positions.
The base on which the reactors and capacitors are mounted should have cut-outs or perforations for better air flow. The best practice is to use rails / channels for mounting.
The door edges should be sealed properly with gaskets, so as to avoid leakage and short cycling of the cooling air.
Hence, proper thermal design would pave way for maximizing the life of important equipments like capacitors, thyristor switches and reactors.
Bhatia Mudit
Larsen & Toubro
India
PROFESSIONAL EXPERIENCE
Electrical Standard Products, Larsen and Toubro, Mumbai
Sales - Bangalore Jan 11- Till Date
Outstanding performer FY 10-11. Promoted to M1A framework in L&T
Handling Consultants in Bangalore and putting our specifications
Looking after category A panel builders
Handling major stockists
Product manager- Powergear and Fusegear Products 2009- Dec 2010
Top performer in 2006-07,07-08, 08-09 & 09-10
Head of the team responsible for marketing products with an annual sales of $ 80 Million
Create and Implement strategic plans for product groups to achieve the targeted sales and profitability
Develop new product proposals
Create product road maps for the next five years
Introduced three new product ranges
Product Executive- Fusegear Products 2007-2009
Worked on product pricing strategies
Collaborated with engineering and design teams on product improvement initiatives
Conducted training programs for sales teams and channel partners
Only employee in the strategic business unit to complete 'Harvard Manage Mentor' in 2008-09
GraduateEngineer Trainee 2006-2007
Tracked the on field product performance ans suggested product improvements
Created product catalogs and sales presentations
EDUCATION:
Bachelor of Engineering in Electrical Engineering
Fr C. Rodrigues Institute of Technology, Mumbai - 2002-2006 Only student in batch to have consistently secured Distinction in all semisters
Class Represntative in the second year of Engineering
Awarded JRD, Tata scholarship based on performance in second year of Engineering
All India Senior Secondary Examination - 2001-2002
St. Mary's School, New Delhi
Second highest aggregate (92%) in core subjects of Physics, Chemistry and Maths
Maharashtra State Scholarship for Class VII - 1996-1997
Secured Maharashtra state scholarship in class VII