ASSURING SAFE ELECTRICITY TRANSFORMING SERVICE
TO OUR NATION
Head Office : No, 137/66, South New Street, Thenkarai, Periyakulam,
Theni (Dt)-625 601
Branch : No.47,Kamarajar Daily Market,MTP ,Thudiyalur,
Coimbatore- 641034
E-mail: [email protected]
www.voltapowerengineering.com
GST NO: 33CXOPK6298M1ZK
U.KATHER SHEIK MEERAN
8610350822, 8056798468
S.SUTHAKAR
8883103425
Our Vision
Our Mission
Values
NATURE OF WORK
Entire Electrical Equipment maintenance / Repair /
Retrofitting Solution under One Roof.
Electrical Contractors, Volta is dedicated to providing the
highest quality electrical services at the fairest price to all
sites throughout India.
Safety Quality
Teamwork Customer Service
✓ Transformer Oil Filtration Streamline And High Vacuum Filters
✓ Transformer Servicing, Repairing And Rewinding
✓ Precommissioning Tests On Transformers And Electrical Systems ✓ High Voltage Testing Of Transformers And Other Ht Equipments
✓ Testing Of Protective Relays And Breakers ✓ Servicing Of Circuit Breakers and Switch Gears.
✓ all types of panel fabrication
✓ All Electrical Spares Available
➢ DISTRIBUTION TRANSFORMER
➢ POWER TRANSFORMER
➢ CURRENT TRANSFORMER
➢ POTENTIAL TRANSFORMER
➢ FURNACE TRANSFORMER
➢ BOOSTER TRANSFORMER
➢ RECTIFIER TRANSFORMER
➢ LOCOMOTIVE TRANSFORMER
➢ MINING TRANSFORMER
➢ PHASE SHIFTING TRANSFORMER
➢ WELDING TRANSFORMER
➢ HIGH VOLTAGE TESTING/SC TESTING TRF.
➢ GROUNDING TRANSFORMERS
➢ CONVERTER TRANSFORMER
OUR SERVICES TO ALL TYPES OF
TRANSFORMERS
All Testing Equipments are having Calibration with Govt. of Tamil Nadu.
➢ Transformer to be maintain perfectly. For better
performance, every year Transformer
➢ Oil to be Tested periodically and Oil Filtration work to
be carried out to get the BDV
➢ Acidity Values as per Govt. norms to avoid accidents
and its poor performances.
➢ Periodical maintenance and Oil Filtration work will
extent Transformer’s life span.
➢ We Issue Certificate for the BDV and Acidity Values,
after Oil Filtration work.
➢ Earth Pit Testing. Earth Fault Relay Testing also
carried out by us.
➢ We also carried out Repairing & Reconditioning of
Distribution Transformers in Various Capacities.
➢ We are having all Infra Structure to do all kind of
Transformer work at our Site.
➢ Transformer Oil Filtration Streamline
Type Test of Transformer
To prove that the transformer meets customer’s specifications and design
expectations, the transformer has to go through different testing procedures in
manufacturer premises. Some transformer tests are carried out for confirming the
basic design expectation of that transformer. These tests are done mainly in a
prototype unit not in all manufactured units in a lot. Type test of transformer
confirms main and basic design criteria of a production lot.
Type tests of transformer include:
➢ Winding resistance test of transformer
➢ Transformer ratio test
➢ Transformer vector group test
➢ Measurement of impedance voltage/short circuit
impedance (principal tap) and load loss (Short circuit
test)
➢ Measurement of no-load loss and current (Open
circuit test)
➢ Measurement of insulation resistance
➢ Dielectric tests of transformer
➢ Temperature rise test of transformer
➢ Tests on on-load tap-changer
➢ Vacuum tests on tank and radiators
Routine Tests of Transformer Routine tests of transformer is mainly for confirming the operational performance
of the individual unit in a production lot. Routine tests are carried out on every
unit manufactured.
Routine tests of transformer include
➢ Winding resistance test of transformer
➢ Transformer ratio test
➢ Transformer vector group test
➢ Measurement of impedance voltage/short circuit
impedance (principal tap) and load loss (Short circuit
test)
➢ Measurement of no load loss and current (Open circuit
test)
➢ Measurement of insulation resistance
➢ Dielectric tests of transformer.
➢ Tests on on-load tap-changer.
➢ Oil pressure test on transformer to check against
leakages past joints and gaskets
➢ That means Routine tests of transformer include all the
type tests except temperature rise and vacuum tests. The
oil pressure test on transformer to check against
leakages past joints and gaskets is included.
Special Tests of transformer include
➢ Dielectric tests.
➢ Measurement of zero-sequence impedance of three-
phase transformers
➢ Short-circuit test
➢ Measurement of acoustic noise level
➢ Measurement of the harmonics of the no-load current.
➢ Measurement of the power taken by the fans and oil
pumps.
➢ Tests on bought out components / accessories such as
buchhloz relay, temperature indicators, pressure relief
devices, oil preservation system etc.
➢ Special Tests of Transformer
➢ Special tests of transformer is done as per customer
requirement to obtain information useful to the user
during operation or maintenance of the transformer.
Transformer Oil Filtration Streamline And High Vacuum Filters
To avoid transformer failure, your insulating oil should be free from any
contamination, dirt and moisture. Thus, transformer oil filtration process is
needed. In this procedure, insulating oil is tested and treated so that
transformers will function efficiently.
Insulating oil filtration process
Rising oil temperature First step is to raise oil temperature up to 65°C to give latent heat which
separates moisture and gases. Heating the oil will make it easier to filter
because of the decrease in oil viscosity.
Removal of dirt and impurities
Second step is to remove sludge and dirt from the insulating oil. There are 2
ways to eliminate dirt in the transformer oil.
✓ By filter candles
Insulating oil filtration by filter candles can be classified by using classical
edge filter or depth type filter. However, new advancements were made in
which transformer oil filtration machines use filter cartridges instead of edge
type paper filters.
✓ By centrifuging action
Another method for separating dirt from oil is through centrifuging.
Benefits of transformer oil filtration
➢ Insulation properties of the oil is improved
➢ Longer life span of transformers
➢ Lessens transformer’s breakdown
➢ Good returns on investment for having a quality machine
Transformer Oil Break Down Voltage Test BDV test means Breakdown Voltage Test. It is done for checking the
dielectric strength of the oil of the Transformer. Dielectric strength means
the maximum capacity to withstand voltage of insulating oil.
This test shows the dielectric strength of Transformer oil.
Acidity Test Of Insulating Oil
The acid neutralization number, or acid number, is the amount of potassium
hydroxide (KOH in mg) required to neutralize the acid in one gram of oil. It is
indicative of the acid content in the oil. ... New transformer oils contain practically
no acids. The acidity test measures the content of acids formed by oxidation
Procedure for the test:
➢ Take 1.1 ml of insulating oil in a clean dry test tube through a
syringe or dropper.
➢ Add 1 gm of ethyl alcohol in the test sample and gently shake it.
➢ After shaking add 1 gm of sodium carbonate in the sample.
➢ Again shake it well and add 5 drops of universal indicator, in the
solution.
➢ After the adding of universal indicator, the solution changes its
color and the color chart will indicate that how much acid is
contained in the insulating oil.
ALL Type of OLTC Service
Testing Of Protective Relays And Breakers Type tests are needed to prove that a protection relay meets the claimed
specification and follows all relevant standards. Since the basic function of
a protection relay is to correctly function under abnormal power conditions,
it is crucial that the operation is evaluated under such conditions.
Type Of Relays;
➢ over current
relay
➢ earth fault relay
➢ differential relay
➢ over/under
voltage relay
➢ auxillary relay
➢ tripping relay
➢ distance relay
➢ nagative phase
sequence relay
➢ reverse power
relay
➢ motor
production relay
➢ all typr of relay
extra….
Precommissioning Tests On Transformers And Electrical Systems
High Voltage Testing Of Transformers And Other Ht Equipments
Servicing and testing of Circuit Breakers
➢ oil circuit breaker
➢ air circuit breaker
➢ vaccum circuit breaker
➢ sf6 breaker
L.T Breakers MAKE;
L&T ABB SCHNEIDER CROMPTON C&S ENGLISH ELECTRIC……..
H.T Breakers MAKE;
ABB MEGAWIN BHEL SOUTHERN SWITCH PENTAGON SYSTEM
CONTROL ……
Panel board fabrication
Transformer rewinding
All Electrical Spares Availabl
ALL TYPES OF SWITCH GEAR AND DRIVES CABLES H.T STACTURE SPARES
Our Client Details
➢ Ambika Cotton Mills,Windfarm Division,
Kandamanur,Theni Dt
➢ Akg, Pollachi
➢ Anand Spinners,Kudimangalam
➢ Anand Spinners,Kudimangalam
➢ Anna Cooperative Spinning Mills Ltd, Theni
➢ Aroma Furn Products,Theni
➢ Chenthur Crusher,Dindigul
➢ Cibi Krishna Textiles, Theni
➢ Cumbum Valley Wines
➢ Dynamic Spare And Services, Surandai,Tirunelveli
➢ Eastern Contiments (P) Ltd, (Unit – I),Theni
➢ Eastern Contiments (P) Ltd, (Unit – Ii),Theni
➢ G.G.N Mill, Theni
➢ Ggn Aunit Theni
➢ Giripriya Textiles (P) Ltd,Kudimangalam
➢ Government Hospital Dindugul
➢ Government Hosptal,Theni
➢ Green Infra Wind Energy ,Theni
➢ Growrite Substrates India (P) Ltd,Theni
➢ Hydac India (P) Ltd Coimbatore
➢ I - Fox Renewable & Infra (P) Ltd,Udumalaipet
➢ Imayam Vellakovil
➢ Jothi Micro Cast(P)Ltd, Manaparai
➢ Kmc Blue Metals, Theni
➢ Kosamattam Finance Kerala
➢ Kumarasammy Enginnering College Karur
➢ Leap Green Energy Private Ltd,Palladam
➢ Leonard Hospital, Batlagundu
➢ Mayon Infra ,Kodaikannal
➢ Menaka Mills Pvt Ltd, Theni
➢ Mycol Distributors (P) Ltd,Kudimangalam
➢ N.S.Rathinam & Sons Pvt Ltd,Vedachanthur
➢ Nagai Power Pvt Ltd,Nagapattenam
➢ Natural Cotton Thruneveli
➢ Nsp Knitting Mills,Kangeyam
➢ Nvs Agro Derivatives,Theni
➢ Om Enterprises.Kerala
➢ Prumatech Services (P) Ltd,Thirunelveli
➢ Rajshree Sugars&Chemicals Ltd
➢ Reckitt Benckiser India Pvt Ltd ,Mysore
➢ Region Wind Form, Theni
➢ Robroy Tea Factory,Ooty
➢ S.G Snacks India (P) Ltd,Batlagundu
➢ Sampavai Mill Vellakovil
➢ Sastha Collage Thirch
➢ Selvi Wind Farm Pvt Ltd,Palladam
➢ Shree Rathinahiri Eswarar Spinning
Mills,Kudimangalam
➢ Shree Visaka Spinnerss,Vellakovil
➢ Sree Vijayalakshmi Textiles,Kudimangalam
➢ Sree Vijayalakshmi Textiles,Kudimangalam
➢ Sri Balamalaio Murugan Blue Metal,Vellakovil
➢ Sri Ganapathi Silks,Theni
➢ Sri Rajalinkam Tex,Vellakovil
➢ Sudharsan Exports,Kudimangalam
➢ Talco – Dindigul Tanners Enviro Control Systems
(P) Ltd,Dindigul
➢ Tamara Hotel,Kodaikannal
➢ Tamil Nadi Govermwent Polytechnic Madurai
➢ Tamilnadu Cements Corporation Ltd,Ariyalur
➢ Tata Coffee,Theni
➢ The Carlton (A Unit Of Ferani Hotels Pvt
Ltd),Kodaikannal
➢ Theni Guru Krishna Textile Mills (P) Ltd, (Unit-Ii )
➢ Theni Kammavar Sangam,Theni
➢ Tpk Crusher
➢ Thenelai
➢ Twad Sathapathu,Thirunelveli
➢ Uma Mahesvari Spinning Mill,Vellakovil
➢ Ust Globle,Thiruvananthapuram
➢ Vestas Wind Technology,Kerala
➢ Vijaya Lakshmi Textiles,Arupukoota
➢ Vividwind Energy (P) Ltd,Kudimangalam
➢ Vrg Blue Metal,Vellakovil
➢ Vsb Enginnering Collage Karur
➢ Vv.Iron$&Steels Thothukudi
Our Best Services is Available 24 x 7 days.
CLEAN INDIA MAKE IN INDIA
