Concept of extending the actual useful life of electrical baseline power transformers of 25KVA to 650KVA - Proposal made to IEC

1. Haim R. Branisteanu Confidential & Proprietary
Haim R. Branisteanu, 12 Gotlieb Street, Tel Aviv 64-392 Tel. 03-523-2744
Page 1
Extending useful life of “Distribution Network Power Transformers”
25kva to 650kva - for up to 50 years, a brief review
TO: Mr. Ron Weiss, IEC Senior Vice President July 14, 2016
The problem; - In many instances the power rating of “distribution power transformer” within
neighborhoods or light industrial zones etc., where installed years ago for a certain anticipated
electrical power level. Due to the popularization and increased use of air conditioners in offices and
washing machines in residential households or increased number of apartments due to new building
or expansion, many “power distribution transformers” are reaching their power limits where
hysteresis losses and eddy currents losses substantially increase their operating temperature. In case
of core magnetic saturation the hysteresis losses increase abruptly and with it the operating
temperatures of the transformer which may burn out the insulation and oxidize the cooling oils
Undesirable results; - Due to higher operating temperature the two main factors that may bring
to transformer total failure are the degradation of the windings insulation and oxidation of the
cooling oil which in turn shortens the useful life of a power transformer from an estimated 50 years
to as low as 10 to 15 years. The accepted rule of thumb is that the life expectancy of insulation in all
transformers is halved for about every 7 °C to 10 °C increase in operating temperature[1], this life
expectancy halving rule, in the case of transformer of cellulose winding insulation, is holding more
narrowly when the increase is between about 7 °C to 8 °C. Temperature swings are also not helpful.
Proposed solution to extend transformer useful life; The proposed product is to install on
the “Distribution Network Power Transformers” small electro-magnetic and temperature sensors
with similar MTBF as the transformer, which will monitor the transformer hysteresis curve losses
and temperature in a preprogramed fashion and signal to an electrical energy storage system to
supply synchronized electrical power per phase on the lower voltage line, and by this lowering the
power needed to be supplied by the transformer to the low voltage network and diminishing or even
eliminating the overheating of the distribution power transformer and improve the network PF .
The system will work in a closed loop after being triggered. The electrical energy in storage will be
accumulated at night when the lower electricity prices prevail or make partial use of solar panels.
The preferred storage medium will be modern batteries in conjunction with supercapacitors to
supply the initial surge in energy, which can be selected to be 3 phase or for each electrical phase.
Economics of the proposed setup; Based on recent pricing of electrical power in Israel and
the anticipated need of so called “power shaving” and phase balancing, the ROI based on prevalent
adequate storage battery pricings is between 6 to 8 years depending on location and time span of
electricity demand overshoot. Within 5 years there is anticipation of a price drop of over 50% /KWH
Economic benefits; The net results of such installation will not only extend prevalent electrical
power distribution transformers life, but also generate an “IoT” distributed network of stored energy
evolving with time in an electrical distributed storage system which can be used if needed, instead of
the “Pumped Hydro” projects. In addition the system will generate substantial more profits to
IEC and new employment for trained technicians. More so, the system will balance and level out, to
certain extent, the swings in electrical generation, due to the electrical power consumption needs.
1
About 30% of distribution power transformer failures are due to overheating or insulation and overloading failures.

2. Haim R. Branisteanu Confidential & Proprietary
Haim R. Branisteanu, 12 Gotlieb Street, Tel Aviv 64-392 Tel. 03-523-2744
Page 2
Financing the project; - Due to the high yield of the investment, which is expected to be over
12% and the distributed nature of the project, I estimate that there will be several venues of
financing the projects as long as the yields or interest rates on the 10 year US Treasuries will stay
below 2.5% to 3.5% resulting in an adequate spread to cover maintenance expenses as needed.
A successful implementation of the proposed project, will also open the door to exports of IoT [2]
integrated systems, in order to effectively balance power generation and energy usage, to be
executed by IEC engineering units for oversees electrical distribution companies.
Kindly let me know if IEC is interested.
Sincerely yours
Haim Branisteanu
My background; Studied Physics and Mathematics at HUJ, my MSC work was on super-
conducting materials, founded a loudspeaker company with exports to the UK, Italy and
US/Canada. Later was involved in operational consulting at Tadiran Ltd., including Lithium Ion
batteries high frequency and energy savings inverters whose electronic circuitry principles are used
in today’s solar panel inverters. Left for the US due to a personal tragedy and was embraced by the
US Army - Signal Corps who recommended me to their subcontractors. Later was recommended by
partners of the Big 6 international accounting firms and big NYC & NJ law firms to engage in
corporate finance and operational restructuring of companies with sales in excess of $350 million.
Funding originated and provided up to $100 million.
During the period of 1997/1999 with a group of US investors initiated the building 500MW electrical
power station with full support of the US State Department and financing support by OPIC, at the
Dead Sea Works instead of “Mishor Rotem”.
Returned from the US for personal / family reasons, was engaged in various international projects at
ministerial level, and financial funding transaction.
Recommendations upon request.
2
Systems based on the concept of Internet of Things, centrally manage energy and power-related information
in an automated fashion with the goal to improve the efficiency, reliability, economics, and sustainability of
the production and distribution of electricity via a cloud based interface. Suitable for Smart Grids.