Transformers Dealers in Salt Lake, Kolkata

As is well known the Transformer plays an important role in the generation, transmission and distribution of electrical energy. Under load the transformer, dissipates heat and the insulating oil acts as a coolant as well as a effective dielectric. Due to the highly hygroscopic nature of the transformer oil, it absorbs moisture from windings, which leads to gradual deterioration of dielectric strength. TRUHEAT oil purifier is the most efficient and economical purification system

• Features: Heat resistance High efficiency , As per the industry standard ,Proper finishing , Simple to install.

• Type: Transformer Oil
• Application: Transformer
• Form: Liquid
• Packaging Type: Drum
• Packaging Size: 209
• Country of Origin: India
• Brand Name: BPCL
• Purity: 100%
• Resistivity: Corrosion & Chemical resistant

• Transformer Rubber Bushing: Black

• Brand Name: Power
• Application: Lubricating
• Packaging Type: Can
• Type: Transformer Oil
• Country of Origin: India
• Transformer Type: Power Transformer
• Quantity Per Pack size: 26 Ltr

Direct Measurement of voltage in high voltage system is not possible because of difficulty in electrical isolation of measuring instruments. It is also not possible to use voltage for the system protection due to its high value and difficulty in electrical isolation of protective relays. Therefore, Voltage Transformers are used to step-down the high system voltage to standard value accurately in proportion to their ratio. Basic Functions of voltage Transformer are To reduce the line Voltage to a value, which is suitable for standard measuring instruments, relays, etcTo isolate the measuring instruments, meters, relays etc. From high voltage side of an installationTo sense abnormalities in voltage and give voltage signals to protective relays to isolate the defective system Theory General principles of power transformer design also apply to the voltage transformers but there are certain considerations of performance which are of particular importance. In the electromagnetic voltage transformers, accuracy depends on leakage reactance and winding resistance. These determine how the phase error and voltage error vary as the burden on secondary increases. The permeability and power dissipation of core material affects the exciting current and thus the error at zero burden. To comply with the requirement of IS:3156/IEC: 60044-2, Flux density employed in Voltage transformer is much less than the value generally used in power transformer. The turns ratio and voltage drop due to leakage Design Single Phase Electromagnetic Voltage Transformer (EMV) is manufactured in two types Single Pole (To connect between line & Earth)Both Pole (To connect between Line-to-Line)hase Voltage Transformers are of star/star connected or star/Open delta connected (residual Voltage Transformer) type. Single – Phase voltage transformers are manufactured for 11kV to 132kV system voltage, where as 3 phase voltage transformer are manufactured for 11 kV to 33 kV system voltage Construction Voltage Transformer Mainly Consists of Primary & Secondary WindingElectromagnetic CoreBottom Tank & Top Oil Expansion ChamberPorcelain BushingStainless Steel Bellow Primary & Secondary Winding Enameled copper wire is used for winding. Primary is wound with multi layer and graded insulation. The diameter and length of each layer is selected such that surge voltage is distributed equally in all layers of the Winding. Multilayer Kraft Paper Insulation is provided between winding layers. Stress equalizing shield is provided on last layer of the winding. H.T. Connection is brought out through metallic galvanized pipe. Secondary is separately wound and inserted in the primary winding as per the requirement. Winding and taping of VT is done in dust free atmosphere. Electromagnetic Core CRGO Silicon Steel Lamination is used for building up Electromagnetic Core. Shell type construction is used to minimize leakage reactance. Bottom Tank & Top Oil Expansion chamber Bottom Tank and oil expansion chamber are made of M.S. Sheet. All tanks and chambers are painted with oven baked paint, after cleaning by seven tank process. All surfaces which come in contact with oil are painted with oil insoluble paint. M.S. Parts can be hot dip galvanized on request. Porcelain Bushing Brown Glazed porcelain Bushing with different shed profiles to suit different pollution conditions is used. These Bushings are Hollow cylindrical Type Conforming to I.S. 5621/IEC 815. Bushing with collar at both the ends is clamped using Aluminium Flange. Nitrile and Neoprene Gaskets are used at both sides of collar to from flexible joint. This joint can sustain vibrations without damaging bushing. Bushings with cemented Flanges are also used. Insulation High quality Electrical Grade Kraft. Paper rand Crepe Paper is used for insulating primary and secondary winding of V.T. The high voltage connections is brought through paper condenser formed on metallic galvanized pipe using fine grading of insulation semi-conducting shield is used to give linear distribution of electric stress ailing the length of the bushing. The paper insulation is dried in oven under very high vacuum and strictly controlled conditions. Filtered and de-aerated EHV grade oil is filled in V.T., while V.T. is under vacuum. To seal it, the space left for expansion on the top is filled with dry and pure nitrogen through non-returnable valve at pre-determined pressure. Testing Truvolt Engg. Testing Lab is equipped with modem test facilities to carry out all routine test, including temperature rise test. Partial discharge Measurement plays a vital role in quality control of insulation. All our Vts are tested for Partial Discharge on most modern bridge type partial Discharge Test Set. All the Vts pass through a standardized quality assurance plan ensure requisite top quality at every stage and in the final product. Packing & Transportation All Vts are packed with strong jungle wood to take care of most adverse conditions of transportation all over the country. Special seaworthy packing is done of the Vts for export. Maintenance Vts do not require maintenance apart from occasional cleaning of Bushings and checking of Nitrogen Pressure.

• Power: 25 kVA
• Phase: Single Phase
• Current: 4 Amp
• Usage: Industrial
• Output Voltage: 240 V
• Mounting Type: Floor Mounted
• Input Voltage: 220 V

Rts power corporation is pleased to introduce itself as one of the leading manufacturers of power & distribution transformers, cables and conductors since 1972. We manufacture and supply distribution & power transformers of various capacities ranging from 10 kva to 100 mva, 113366132 kv class and supply the same to the different state electricity boards, various private & government organizations all over the country and abroad. we currently run 6 manufacturing facilities in india: jaipur (rajasthan), agra (u.p.) and kolkata (w.b.) and in ethiopia (dukem industrial area). 1) kolkata unit (head office) > power & distribution transformers jala dhulagori, sankrail, dhulagori, howrah 711302 (w.b.) > power & distribution transformers 130 dharmatala road, salkia, howrah 711302 (w.b.) 2) jaipur units > power & distribution transformers, cables & conductors c-174, vishwakarma industrial area, sikar road, jaipur 302013 > power & ehv division – 132 kv class transformers e-346, road no. 16, vishwakarma industrial area, jaipur – 302013 the company has set-up a cable and conductor manufacturing plant at jaipur that commenced commercial production in march 2007 3) kaladera > transformer oil a-25-26, riico industrial area, kaladera, jaipur (rajasthan) 4) agra > power & distribution transformers near 14 km mile stone, mathura road, p.o. Artoni, agra 282007 (u.p.) 5) ethiopia unit > repairing & after sales services dukem, oromia, ethiopia besides the above, we also manufacture and supply dry type transformers (upto 2500 kva, 110.433 kv). This department is equipped with vacuum impregnation tanks, multi faceted ovens, dust free manufacturing area and other equipment required specially for the dry type transformers.

• Material: Porcelain
• Packaging Type: Box
• Color: Black
• Country of Origin: Made in India
• Frequency: 50-60 Hz
• Voltage: 11Kv

• temperature: 70-80 C.

As is well known the Transformer plays an important role in the generation, transmission and distribution of electrical energy. Under load the transformer, dissipates heat and the insulating oil acts as a coolant as well as a effective dielectric. Due to the highly hygroscopic nature of the transformer oil, it absorbs moisture from windings, which leads to gradual deterioration of dielectric strength. TRUHEAT oil purifier is the most efficient and economical purification system. It consists of the following:Filter Unit,Indirect system of Oil Heating,Vacuum Dehydration Degasification Unit,Condenser and Condensate Receiver,Feed and Delivery Pump,Piping & Valves,Control Panel

  Resin & Oil Cooled CT & PT BETWEEN 11 Kv & 33kv Type tested from CPRI Bhopal Available in Different accuracy class, Ratio & Burden Suitable for Indoor & Outdoor application CT Bank and Insulators as per customer requirements.

We are offering control transformers. Control transformer is a transformer which supplies power to control and / or auxiliary equipment not intended for direct connection to the main source. Control transformers are specifically used to provide control supply voltage for the control circuits of ac motor starters, i.e. Starter coils, timers, indicating lamps electronics protection relays etc. Control transformers for contractor applications have to energize the coil and maintain a contact for definite period of time. The initial energizing of the coil takes 5 to 40 mil. Seconds and requires 3 to 10 times the normal current. While calculating the va rating of the control transformer, this factor should be taken in to account. They are available for single phase and three phase inputs and are in the range from 15 va to 30 kva. construction control transformers are two winding transformers with both windings made of copper. Power house transformers are made of using high quality materials. Electrolytic grade super enameled wire with best insulations are used. Core material are crgo ei or strip cores. Experienced hands with best machines for winding ensures best results with minimum size. Appropriate class of insulation materials are used. Transformers are impregnated in insulating varnish for long lasting performance. Input and out are terminated on bakelite board with proper size of terminals. information required while ordering: a) input supply- voltage, frequency and number of phases i.e. Single or three phases. In case of three phase system type of connection- star / delta / vector group. b) out put voltage and current in of each secondary winding( if multiple out put windings are required). C) class of insulations: d) service conditions if other than standard service conditions. application specific transformers: we make transformers as per specific requirements and some of standard applications are * auto transformers for auto transformer starter, * high voltage transformers, * high current transformers for load testing, * potential transformers for metering and instrumentation, *short circuit-proof transformers, *pulse transformers for power electronics

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