Latest Products Latest Products 17-12-19 en-us Power Distribution Transformer Tue, 19 Dec 2017 00:00:00 +0530 We are engaged in manufacturing Power Distribution Transformer to meet the present-day needs of effective power distribution in various establishments. We have installed facility to manufacture Oil-filled Power and Distribution Transformers up to 10 MVA, 66 KV Class. The tested range of Power Distribution Transformers can also be customized to meet the requirements of individual, Industrial, commercial, co-generation and utility services. The Power Distribution Transformers can be provided with a variety of terminations to meet individual requirements for new installation, replacement etc.   Applications : Industrial Purpose Electricity Board Domestic and Consumer Transformers Wind Mill Power transmission   Standard Fitting : Monogram plate. Rating & diagram plate . Earthing terminals – 2 Nos. Lifting lugs for complete transformer. Thermometer pocket. Air release hole with plug. Oil filling hole with plug on conservator. Oil conservator with drain plug. Dehydrating breather (1 No.) sillicagel type with oil seal & connecting pipe. Prismatic oil level indicator – 1 No. Drain valve with plug – 1 No. Drain cum bottom filter valve with plug. Inspection cover. Externally operated off circuit tap changing switch. Jacking lugs. Under base with flat bi-directional treaded rollers. Radiators. Pressure relief valve without electrical contacts. Filter valve with plug. Sampling valve. LV additional neutral- out door bushing – 1 No. H.V.TERMINALS – BARE BUSHING. L.V.TERMINALS - CABLE BOX. Buchholz relay. Magnetic oil level gauge with low oil level alarm contacts Oil temperature indicator with electrical contacts for alarm and trip . Winding temperature indicator with electrical contacts for alarm and trip. Marshaling box. Ultra Isolation Transformer Tue, 19 Dec 2017 00:00:00 +0530 Ultra Isolation Transformer is manufactured by us with the aid of latest technologies to protect the Isolating sensitive equipment. We also offer power isolation transformers and super isolation transformer in the market. The Ultra Isolation Transformers are specially designed for sensitive critical equipment like computers & peripherals, medical instrumentation, digital communication telemetry systems, CNC Machines etc. and stopping such disturbances generated by the noisy equipment load from being injected into the power line. Multiple shielding techniques employed reduce the inter winding capacitance to below 0.005 Pico farad and increase D.C Isolation to over 1000 Megohms. Technically, transformers that have no direct current path between their primary & secondary windings provide Isolation. Other commonly used, transformers even if they have separate primary & secondary winding are intended to convert the input voltage to a more useful level & do very little to attenuate the passage of noise or transients from primary to secondary. Even through both are separately wound transformers, they are substantially different w.r.t construction, specification & performance characteristics. In shielded transformer, Four Low impedance path exists for noises to pass to secondary & vise versa. : The High Value of Coupling Capacitance. The Maximum Linkage of Magnetic Field. The Leakage Current. Static transformer of Electric Noises.   Provides Protection Against : Line Voltage transients Spikes D.C Leakage Dry Type Transformer Tue, 19 Dec 2017 00:00:00 +0530 We are named among the renowned Manufacturers, Exporters and Suppliers of Dry Type Transformer. We offer advanced range of Dry Type VPI /VPE / CAST MOLDED Transformers with off circuit tap links (up to 5000 KVA in 11 KV Class). We use electrolytic grade 99.9% pure copper in the manufacturing process of our Dry Type Transformer. It is basically designed for trouble-free performance, confirming to IEC – 76 & 726. Use of Class ‘F’ / ‘H’ insulation in our Dry Type Transformer increases the heat bearing capacity.Why Dry Type Transformer From Power Engineers Company (PEC)?PEC offers advanced range of Dry Type VPI /VPE / CAST MOLDED Transformers with Off Circuit Tap Links (up to 5000 KVA in 3.3 KV Class.), using CRGO M3 to M5 MOH Lamination and Electrolytic Grade 99.9% pure copper. These transformers are designed for trouble-free performance, confirming to IEC – 76 & 726 with low power loss and low noise. Use of modern manufacturing techniques and optimum utilization of active materials ensures cost effectiveness, reliability and a long trouble-free performance.Dry Type Transformer are fitted in enclosure for Indoor installations and are totally maintenance free and safe from fire as the material used is metal, ceramic, NOMEX and resin. It is environment friendly as there is no oil, hence handling becomes easier and there are no chance of spillages and leakage and there is minimal nontoxic smoke in case of fire. Use of Class ‘F’ / ‘H’ insulation increases the heat bearing capacity and enables the use of the transformer in humid and chemically polluted atmosphere. Fire safety and environmental aspects are of increasing importance. The substitution of oil-filled transformers by dry type transformers is one of the most important steps towards it. VPI transformer is used when it has to be located near load centre and in a fire hazardous place. Special type of fire resistant insulation is used for the windings, thus reducing the fire risk considerably. Dry-Type Transformers Can have Their Windings Insulated in a Number of Different Ways :There are several different construction methods used in the manufacture of dry-type transformers, resulting in various designs that make installation in many different environments possible. The key difference in the design of these units is in the insulation of the windings. Dry-type transformers can have their windings insulated in a number of different ways. Open wound The standard dry-type transformer follows a “dip-and-bake construction” method. This is accomplished by preheating the conductor coils and then, when heated, dipping them in varnish at an elevated temperature. The coils are then baked to cure the varnish. Vacuum Pressure Impregnation (VPI) This technique applies the varnish coating in interchanging cycles of pressure and vacuum. The VPI process uses polyester resin. The coils are then cured in an oven. The VPI process is better than the standard dry-type transformer because it includes pressure in addition to vacuum. This process allows better penetration of the varnish in the transformer coil. These units offer an increased resistance to corona. Vacuum pressure encapsulated (VPE) VPE transformer coils are vacuum pressure encapsulated in high temperature Silicone varnish to provide the ultimate protection against moisture. The silicone VPE process utilizes a special four cycle procedure that employs the fundamental principles of vacuum pressure encapsulation and curing. Because of the inherent bonding strength of silicone varnish, the finished coating remains smooth and gives superior environmental protection. Coils receive a minimum of 4 cycles of silicone varnish, and the core and clamping structure are coated with a corrosion resistant sealant that guards against moisture and industrial contaminants. Silicone varnish provides excellent dielectric strength that remains pliable even after thermal aging. The silicone varnish is a true 220 °C insulating material tested to above 250 °C. The silicone VPE process utilizes conventional dry type designs and offers optional conductors, BIL levels, and temperature rises with a 220 °C Class insulation system. Cast coil (mould epoxy sealing) These units incorporate coils encapsulated in epoxy by a moulding process. The transformer coils are solidly cast in resin under a vacuum in a mould. The manufacturing process locks the windings in a strong epoxy resin with high dielectric strength, protecting the transformer from severe operating environments (As mentioned in epoxy cast resin transformer) Each of the winding insulations noted above is specifically suited for particular environments. Therefore, it's important to understand where best to use each type. For example, it costs approximately 25% more to specify a cast coil transformer over a VPE or VPI type unit. Therefore, your final selection can have a significant impact on the overall cost of a project.When improved resistance to corona (i.e., electrical discharges caused by the field intensity exceeding the dielectric strength of the insulation) and increased mechanical strength of the windings are required, you should use a VPI-type transformer.Use a cast coil transformer when additional coil strength and protection is needed, such as in unforgiving environments like chemical process plants, construction material factories, and for outdoor installations. These types of harsh environments include substances that can devastate the windings of other dry-type transformers, including salt, dust, caustic gases, moisture, and metal particles. Additionally, cast coil transformers have improved abilities to withstand heavy electrical surges, such as recurring but short-duration overloads experienced by transformers serving industrial processes. Cast coil transformers typically have the same increased levels of BIL as oil-filled transformers, while still providing ample protection of the transformer coils. Cast coil transformers are also being used in some harsh locations that were previously thought best served by liquid-filled transformers. Advantages   High level of safety. No flammable liquids. No pollution from leaks solution. No toxic off-gasses. Can be placed close to the load. More efficient. Improved reliability. Low Noise and low maintenance. Easy to repair (open coils). Servo Voltage Stabilizers Tue, 19 Dec 2017 00:00:00 +0530 Power Engineers Company is Manufacturer, Exporter & Supplier known for reliability and continuous improvement in the field of rolling contact type automatic voltage controller, automatic voltage stabilizer, electroplating, chemical process rectifiers and special purpose transformers. The systems are designed and supervised by a team of qualified engineers having more than 35 years of experience to achieve best possible quality to total customer's satisfaction. Introduction :In spite of best efforts by the State Electricity Boards, the voltage at consumer ends is never the required voltage. This is because of longer distribution lines and different loading at different time on Distribution Transformers. For example, a consumer near the Distribution station gets high Voltage but the farther most consumers may be getting low Volts.Most of the industries are working in the daytime, so loading on the transformer is more and generally, voltage is low in day time. In the night most of the units are closed and there is practical no domestic load, the voltage may be to the tune of 440-480 Volts.So, practically every industry needs system which may keep the voltage constant. To maintain the voltage stabilizers are available in the market for refrigerators, electrical machines and electronic equipments but these are of very low capacity. We have developed and installed industrial voltage stabilizer throughout India which are suitable for 100% continuous duty cycle supplied up to 5000 KVA which have more than 99. 5% efficiency.PEC have developed LINER TYPE REGULATOR WITH ROLLING CONTACT CARBON ROLLERS and installed up to 5000 KVA capacity. Which are suitable for 100% continuous duty cycle & having more than 99% efficiency. Commitment to provide an UNCONDITIONAL GURANTEE for FIVE YEARS. Industrial units achieve the under noted advantages after installing Automatic Voltage Controller. Reduction in breakdown of electrical equipments upto 60-80%. Energy saving : 5 to 10% on motor load & 15-25% on lighting load. Reduction in MDI : Definite reduction in MDI by 10-15%. Improvement in power factor : In case of high voltage only. Depreciation allowance @ 80% as per Income tax Act Uniform quality of end product. Voltage Optimisation  is a term given to the systematic controlled reduction in the voltages received by an energy consumer to reduce energy use, power demand and reactive power demand. While some voltage 'optimisation' devices have a fixed voltage adjustment, others electronically regulate the voltage automatically. Voltage optimisation systems are typically installed in series with the mains electrical supply to a building, allowing all its electrical equipment to benefit from an optimised supply.Over Voltage Various technologies can be used to avoid overvoltage, but it must be done so efficiently so that energy savings resulting from using the correct voltage are not offset by energy wasted within the device used to do so. Reliability is also important, and there are potential problems inherent in running full incoming power through electro-mechanical devices such as automatic voltage controller.Under Voltage refers to voltage lower than the voltage at which equipment is designed to operate most effectively. If the design of the VO does not take into consideration voltage drop over distance to remote power users, then this may lead to premature equipment failure, failure to start up, increased temperature in the case of motor windings and loss of service.Effects On Electrical Loads : A common misconception as far as Voltage Optimisation is concerned is to assume that a reduction in voltage will result in an increase in current and therefore constant power. Whilst this is true for certain fixed-power loads, most sites have a diversity of loads that will benefit to a greater or lesser extent with energy savings aggregating across a site as a whole. The benefit to typical equipment at three phase sites is discussed below.Three Phase Motors : Three phase induction motors are probably the most common type of three phase load and are used in a variety of equipment including refrigeration, pumps, air conditioning, conveyor drives as well as their more obvious applications. The de-rating effects of overvoltage and three phase imbalance on AC motors are well known. Excessive overvoltage results in saturation of the iron core, wasting energy through eddy currents and increased hysteresis losses. Drawing excessive current results in excess heat output due to copper losses. The additional stress of overvoltage on motors will decrease motor lifetime.Reducing voltage to an induction motor will slightly affect the motor speed as slip will increase, but speed is mainly a function of the supply frequency and the number of poles. Motor efficiency is optimum at reasonable load (typically 75%) and at the designed voltage, and will fall off slightly with small variations either side of this voltage. Larger variations affect efficiency more. Very lightly loaded motors (<25%) and small motors benefit most from reducing voltage.If the input voltage of motors driven by Variable Speed Drives is reduced, there will be a proportionate dip in the output voltage and the drive will draw less current and eventually consume less power. However if the motor is running on high load (>80%), the dip in voltage will result in reduced torque and motor will end up drawing more current and power.Energy Savings : The energy savings achieved by Voltage Optimisation are an aggregation of the improved efficiency of all equipment across a site in response to the improvements in the power quality problems outlined above. It has been and continues to be a key technique for savings in energy consumption. Research in Taiwan suggested that, for an industrial supply, for voltage reduction upstream of the transformer, there is a 0.241% decrease of energy consumption when the voltage is decreased by 1%, and an increase of 0.297% when the voltage is increased by 1%. This assumed a mixture of loads including 7% fluorescent lighting, 0.5% incandescent lighting, 12.5% three phase air conditioners, 5% motors, 22.5% small 3-phase motors, 52.5% large 3-phase motors.» This higher current affects the electrical motors (particularly smaller capacity motors upto 7.5 H.P.)in three ways : Higher current produces higher losses in electrical motors which causes premature failure of winding. These higher losses of electric motors also increase the losses of cables, switches, transformers and other associated equipment. For smooth continuous operation of motors, over load relays are usually set at 20% higher setting.   REASON OF FAILURE ON MOTOR LOAD : Electrical equipment’s are designed for 230 volts (single phase) or 415 volts (3-phase) and operate with optimum efficiency at its rated voltage. 90% of industrial load consists of motors. Electric motor (particularly smaller capacity motors up to 7.5 H.P.) draws considerably high current at high voltage and increases energy consumption, increases MDI and reduces power factor etc. These excessive power losses of motors generated at higher voltage results in premature failure of electrical equipment’s. Also after the rewinding of motor its efficiency reduced by 3-5% and you have to replace the motor with new one after 2/3 times rewinding. LIGHTING Within the normal range of supply voltage variations the light output will change by about 3.5% for a 1% change of voltage. The effect of voltage on life is much more pronounced; 5% over-voltage will roughly halve the lamp life, whereas 5% under-voltage will approximately double it. If it is found that lamps are consistently failing prematurely then the first thing to investigate is the agreement between the voltage marked on the lamp, and the actual voltage at the supply terminals. In certain cases, it might seem attractive to operate 230V lamps on a 220V circuit to secure the increased lamp life, until it is realised that in doing so the light output will not fall considerably. It is generally unwise to operate a lamp at anything other than its design voltage, but there are some exceptions. For instance under-volting can be justified for aircraft obstruction lights at the top of a tower where the cost of replacement is very high. By contrast, over-volting is regularly practised in studio lighting, where the extra light output permits fewer projectors on simpler mounting structures and this is a worthwhile exchange for renewing lamps before each filming session rather than after, say, a year of service. The Figure shows the relation between supply voltage variation and the performance of gas-filled lamps. It applies only approximately to vacuum lamps and to tungsten-halogen types.REASON OF FAILURE ON LIGHTING LOAD : Similar is the case with bulbs and tubes, when voltage increases above 230 volts. For example, at 270 volts, the power consumption of 60W bulb increases by almost 40% and the life of bulb reduce from normal 1000 Hours to 100 Hours only as explained in broacher.   PEC’s Servo Voltage Stabilizer primarily consists of the following : PEC’s Servo Voltage Stabilizer primarily consists of the following : LINEAR, PLUS / MINUS TYPE VERTICAL ROLLING CONTACT VOLTAGE REGULATOR : In our regulator we are using heavy section of electrolytic grade rectangular copper strip instead of copper wire to minimize the losses & increase the efficiency of equipment. We are also using self lubricating Carbon Roller Assemblies instead of ordinary Carbon Brushes which offers more reliability and trouble free performance of the equipment. DOUBLE WOUND BUCK / BOOST TYPE SERIES TRANSFORMER : In our Buck / Boost transformer we are using CRGO lamination to minimize iron losses and coils of Buck / Boost transformer are wound with heavy section of multi strips electrolytic copper to minimize copper losses for getting better efficiency of the equipment. ELECTRONIC CONTROL CIRCUIT AND METER PANEL : Automatic Voltage Controller consists of very simple electronic control voltage circuit for monitoring and controlling voltage, repair & maintenance of which is very easy( ALTHOUGH IT IS NOT REQUIRED EVEN FOR SEVERAL YEARS). The regulator and Buck / Boost transformer are oil cooled, housed in same or separate sheet steel tanks. Radiators are provided for effective cooling. The coils of voltage regulator & Buck / Boost Transformers are vacuum impregnated and oven dried as per IS. Variable Voltage Regulator Tue, 19 Dec 2017 00:00:00 +0530 The Variable Voltage Regulator makes variable voltage supplies from 0-11 KV or any desired voltage upto 5000 kva. These variable voltage supplies are used for special purpose applications and testing. Our Variable Voltage Regulator has been designed, manufactured and tested with proper care and attention, to give efficient service. Voltage Regulator/Regulating units manufactured by us comply with IS: 1180 and IS: 2026 as far as applicable. Principle of Operation : The Variable Voltage Supply/ Regulator consist of following basic components depending on the rating of the equipment. Step up Transformer Buck boost transformer Rolling contact type voltage regulator Automatic control gear Figure shows 2000 KVA capacity Variable Voltage Supply/ Regulator with constant Input voltage of 11 kv and variable output voltage from 0-11 kv. It consists of a Step up Transformer, 2 nos. Regulators and Buck Boost transformer. This circuit is normally used to Vary on load voltage when the regulator used in conjunction with buck/boost transformer and step up transformer. The equipment are available with following control devices: Manual version Motorised version Remote control In manual version a Hand wheel / T – Handle is provided and desired output voltage can be obtained by rotating the Wheel / Handle manually. In case of motorized version and servo motor will be provided which can be operated by two sets of push buttons or toggle switch for raising and lowering the output voltage. In case of remote control arrangement one extra set of push buttons will be provided in your main panel from where the operator would be able to maintain the desired voltage with the help of those push buttons. Description-Rolling Contact Regulator This is essential a Continuously tapped auto wound transformer having helical coils mounted on a conventional laminated transformer core. However, the regulating winding is designed as a single layer type giving longer and slimmer version of the transformer coil but in principal it is the same. The regulating winding is varnished and baked to improve rigidity and ensure that the construction is non hydroscopic. After proper treatment longitudinal/track is ground on the coil to form a bared copper surface with the winding wire covering providing inter turn insulation. Graphite rollers , assembled on carrier boards, traverse throughout the length of the coil track. These rollers are connected electrically with the output terminals and as they are driven over the track a variable voltage is obtained. The Regulator may be of one sided or can be made double sided. In case of double sided Regulator both side of regulating winding is bared and allows rollers to be driven in opposite direction on either side of the coil. In such cases carrier boards are provided on both sided of the coils and the output terminals will be taken out though balancing transformer. The contact carrier is driven by a hand wheel / T–Handle or motor which is coupled to the chain drive. Limit switches operated by the carrier board are fitted to prevent over run. In case of your specific requirement additional limit switches will be fitted for minimum position inter-locking along with the auxiliary circuit. The power supply of the motor is derived from the Regulator unless otherwise specified. The entire regulator assembly is housed inside a rigid M.S. Tank filled with oil. The Hand wheel / T – Handle, Motor push buttons etc. is fixed up inside a separate sheet steel box, which is attached to the main tank. Wherever automatic control is required, the solid stat voltage-sensing relay is also provided inside a sheet steel box fitted along with the regulator tank. In VOLTAGE REGULATING UNIT the equipment consist of Regulators and Transformers are explained earlier. The description of the Regulator has already been described above. The Transformer (buck/boost and step up) are of conventional design as per IS: 1180 or IS:2026. The Regulator is combination with transformer gives the desired regulation of the voltage in case of higher capacity and H.T equipment. Some times in Low Voltage higher capacity units the regulator and the transformers are enclosed inside a single tank, however, in case of a high voltage higher capacity units the regulator is housed inside a separate tank and transformer is housed in another tank. A separate instruction and maintenance manual for the transformer is enclosed here with which will be applicable only to the transformer part of the regulating unit. Electroplating Rectifiers Tue, 19 Dec 2017 00:00:00 +0530 The Electroplating Rectifiers are widely used in Electroplating, Anodizing, Hydrogenation, and all other electrochemical processes. These are tailor-made, covering a wide range from 500 TO 25000 AMPS at different output DC voltage as per requirement. Salient Features : Designed for 100% Continuous Duty Cycle Compact Design for Space Saving Lesser Power Consumption Negligible Maintenance Tested at Each & Every Stage of Manufacturing Liberal Design & Rigorous Testing of the Equipment Enables Trouble Free Service for Long Life. Components : OTI Oil Pocket Oil Level Radiators Oil Circulation Pump Bus Bars Siica Gel Breather Butterfly Valves Earthing Terminals Oil Drain Valve UNI Directional Wheels Window for Diodes Oil Tank Indicator Lifting Lugs Brief Specifications : Input Voltage : 380 - 440 Volts, 3- Phase 50 Hz. AC supply or any other voltage Output Voltage : Fixed Rated maximum DC voltage or variable from zero to maximum rated voltage Output Current : Rated maximum DC current Temperature Rise : Less than 45° C above ambient at the top of the oil Efficiency : Depends on voltage current rating of rectifier Ripple Content : Less than 5% Insulation : 'A' class for oil cooled Why the regulator control is superior to thyristorised control in rectifier? Inner View In plating application the regulator is better & technology is adopted in Germany and Europe because of as explained in advantage. Other manufacturers of rectifiers have shifted to thyristors because they do not have the technology of rolling carbon roller regulators. Manufacturers of rectifiers claim that thyristor-controlled rectifier has less losses than regulator. They compare thyristor with sliding carbon type regulator. In our case their claim is not true. We use vertical coil type rolling carbon regulator. The copper section is three times so the losses are almost 1/6 or 20%. In our regulator the roller moves on both sides of the coil to give ± 440 V or ± 254 V output. We design the rectifier in 'Q' connection in which the regulator current is half the line current so losses are less and life is much more. Starting Circuitry: Power Rectifiers are designed for 3 phase 50 Hz. AC input supply & are available for operations at any voltage between 380 and 440 volts, in India but can be designed for 60 Hz AC and any other voltage available. It is recommended that the input to the rectifier should be connected through a proper protective device, to provide positive protection to personal and the system, in the event of maintenance or in case a fault occurs. DC Output Control : The function of the variable output controls is to control the voltage or current or its operating range by varying input voltage to the main transformer primary. The DC output voltage variation is achieved steplessly 0-100% by means of an On Load roller type power make voltage regulator. Advantages of Roller Type Regulator : No. waveform distortion at any load, Electrical wave from is like a moving wheel. Fo 50% Rated Voltage the Dia of wheel is reduced accordingly i.e magnitude for a wave is decreased Higher power factor of more than 98 is achieved The system is simple and can be repaired and maintenance even by simple mechanic The cost of spares is very negligible Copper section for particular current is 3 times than conventional make Carbon roller rolls on coil and has trouble free life of more than 20 years Over all losses are less Advantages of Conventional Make : Wave form distortion in thyrsorised type, It is like cutting the wheel by 50% and then moving the wheel. i.e wave from is cut as shown at full magnitude The power factor is lower between 0.5 to 0.75 The system is specialized and need specially trained Electronic Engineer to repair and maintain The cost of replacement is very high Copper section for particular current in conventional make is 1/3 Carbon brushes slide on coil, have less life due to sliding on coil & breaks regularly Over all losses are less   POWER ENGINEERS COMPANY offers a complete range of rectifier equipment ranging up to 0 - 1100 volts / 25,000 AMPS for all following applications and provides engineering, design and technical support in choosing the right solution/equipment.DC Rectifiers used in Electrochemical Plants like Potassium & Sodium Chlorate, Soda-ash, Caustic chlorine Production, Copper, Aluminium, Zinc refining all require modest voltage and high DC current. DC Rectifier is also required in other industrial process like Electroplating, Hydrogenation, Electrolysis, chlorination. Such continuous process industries look for a reliable, economical and trouble free form of DC power supply system.Applications Electroplating, Anodizing, Galvanising, Electro-coloring Hydrogenation, Chlorination, Electrolysis Electrochemical - Sodium, potassium salts Electro-smelting, Aluminum, Copper, Zinc. Industrial Power Supplies, Cathodic Protection Heating, Magnetisation, Ionisation Epoxy Cast Resin Transformers Tue, 19 Dec 2017 00:00:00 +0530 We manufacture, export and supply Epoxy Cast Resin Transformers in various specifications. The Epoxy Cast Resin Transformers are designed to be Fire resistant, Maintenance Free and Environmentally Safe. Besides, the Epoxy Cast Resin Transformers generate low noise and are very cost-efficient. Made using advanced technology, the Epoxy Cast Resin Transformers are resistant to failures, thus serve as dependable power supply systems. Characteristics Fire resistant : Cast Resin transformers have an inherently safe characteristic of self fire-extinguishing and fire resistance. So there would be no fear of spread of fire even if a fire took place in nearby equipment. The transformers can be used indoors without fear of fire, and it is not necessary to provide additional measures for safety. Ignited for 2 minutes on the surface of cast coil with acetylene torch. As the torch was removed from the surface of burning resin. The flame extinguished by itself after 15 seconds. Maintenance Free : Maintenance is almost completely eliminated. No checking of liquid level and no yearly dielectric test for moisture absorption is required. Due to the smooth coil surfaces, heavy dirt and dust build up is eliminated even under the worst circumstances. The recommended routine maintenance is an occasional visual or Infra-Red thermal inspection. Environmentally Safe : Power-Cast transformers will not emit oil or toxic gases into the atmosphere. Therefore, they do not pollute the environment and are recommended strongly as a replacement for askarel filled (PCB) transformers. PCB is poisonous, chemically aggressive and can discharge dangerous gases at elevated temperatures. Low Noise : The encapsulation of the core in a special resin and the design of the clamping mechanism have provided an appreciable noise reduction. Noise is also reduced due to the sound suppressing effect of the elaborate core cutting and the coil support elastic structure. Cost Saving : If the advantage of Power - Cast transformers is taken into consideration at the planning stage, the overall costs of a power supply system can often be considerably reduced. They are sufficiently compact for convenient installation in a building where space is generally limited and have much smaller power loss than oil immersed and dry-type transformers. Total costs are lower even though cast resin transformers may be more expensive than other transformers. Cost savings add low maintenance and longer operating life in all conditions. Fewer Failures : Standard Insurance Company studies have shown failure rates in cast coil transformers to be less than 5% that of standard dry type transformers in some applications.