L D Power Transformers Pvt Ltd: Distribution Transfomers

Tuesday 24 January 2012

Distribution Transfomers

ELDEE manufactures a wide range of distribution and power transformers ranging from 10KVA to 5000KVA with voltage class upto 33 KV.These transformers can be free breathing or hermetically sealed. Conventional transformers are fitted with a conservator with breather for free breathing while hermetically sealed ftransformers are totally maintenance free and are particularly suited for use in exposed outdoor environments such as moisture,salt or dust laden atmospheres. Ideal for chemical plants,oil and gas terminals where poor accessibility makes regular maintenance undesirable.both types can be supplied with HV and LV Switchgear incorporated into.substations.ELDEE manufactures conventional/hermetically sealed/bolted type,indoor/outdoor type,pole/platform mounted 3 phase,50/60 Hz,oil immersed,ONAN/ONAF/OFWF cooled, step up/step down,double wound with A1/Cu conductor.Optimum design for reliability, accuracy,low losses,specified performance characteristic such as impedance,temperature rise,efficiency, noise level and ability to withstand the thermal and dynamic effects of short circuits,lighting and switching surge are enxured.
Specifications :
• Range : Upto 5MVA upto 33KV Class * Phase : Three Phase * Cooling : NOAN * Frequency : 50 Hz
• Tapping : (a) Offcircuit tap changer to provide +5% to-10% taps in steps of 2.5% (b) On Load tap changer to provide + 7% to -20% taps in step of 1.75%
• Vector group : DYN 11 * Duty Cycle : Continuous * HV Side Cable Box,LV Side Cable Box/Bus Duct
• Core : The core is constructed from low loss,cold-rolled,grain oriented, annealed lamination
• Copper : Electrolyte grade,99.9% pure
• Reference standard IEC/BS/ANSI/IS/NEEMA
Our transformers are tested as per IS 2026 and type tested by testing agencies CPRI,ERDA and RDSO.

Table 1 : Three Phase : 11/0.4333 KV,50HZ

Rating
KVA

NLL
(w)

FLL
(w)

Temp. Rise

Total
Weight(Kg.)

OIL
(Liter)

Dimensions

Length

Width

Height

25
63
100
200
315
630
990
1500
2000

80
180
260
500
1000
1300
1400
2100
2600

615
1235
1760
2800
4500
7500
11500
16000
20000

4.5
4.5
4.5
4.5
5
5
5
6.25
6.5

35/40
35/40
35/40
35/40
50/55
50/55
50/55
50/55
50/55

385
625
730
1000
1300
2450
3290
4550
4350

115
175
190
290
325
500
670
1050
850

910
1050
1180
1440
1800
2150
2350
3400
2650

700
930
850
1100
1450
1600
2250
2200
2500

1280
850
1425
1700
1850
2150
2400
2800
2600

Table 2 : Three Phase : 33/0.4333 KV,50HZ

Rating
KVA

NLL
(w)

FLL
(w)

Temp. Rise

Total
Weight(Kg.)

OIL
(Liter)

Dimensions

Length

Width

Height

990
1500
2000
2500

1800
2200
2950
3600

13000
16500
21500
26000

5.5
6.25
6.25
6.5

50/55
50/55
50/55
50/55

3700
5350
6150
9100

865
1100
1350
2700

2550
2450
2550
3000

2375
3200
3550
2800

2550
2900
2900
3000

Contact Us
L.D.Power Transformers Pvt.Ltd.
Manufacturers of Servo Voltage Stabilizers & Transformers
A-9,Sector 59 , Noida (India).
Fax No : 0120-4248043
T :0120-2586500 , 2580934
Email : ldpower@rediffmail.com

1 comment:

Rohit Kumawat28 March 2020 at 06:51
Thanks for providing a such useful information on Distribution Transfomers written in a very attractive way. Your blog information improve my knowledge about voltage stabilizer.
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Electronic Voltage Stabilizer

The reliable performance and life of house hold elctrical and electronic appliances depend a great deal the status of the AC Voltage being fed to them. At high low or high voltage,malfuctioning of the appliances is bound to happen. Eldee produces automatc voltage stabilizer wth wide range of input voltage to safe guard these appliances under the conditions of low or high voltage. SPECIFICATIONS Input Voltage Output Capacityl 170-270 220+10% 0.5KVA-10KVA 140-280 -dO- 0.5KVA-10KVA 110-270 -dO- 0.5KVA-10KVA 90-270 -dO- 0.5KVA-10KVA Features • Reliable microprocessor based technology • Digital Display • Wall Mounting/ Table Top Models • Very low no load loss • Ver low load loss • High efficiency • Elegant power coated housing. Optional built in feaure • High/Low Voltage Cut off • Intelligent Time Delay • Over load protection • Digital display of over load and of above mentioned parameter • Referance standard IS:8448 Applications where the complete house is to be stabilized,we have stabilizers with low and high voltage cut off with by pass facility employingS.two MCBS. The stabilizer is connected immediately after the mains meter. In the event of cut off due to erratic voltage or where the voltage supply from the eitlectricity board is healthy By Pass MCB is switched on to get AC Power directly from the mains. ADVANTAGES: 1.No load losses though small can be saved when the voltage is healthy(By Passing the stabilizer) 2.House will not be without electricity when cut off occurs due low and high volatage.

Package Substation

ld Power offer range of unitized substation that are available in different models. Durable and compact in size, these substations can easily be shifted to the place where they are required. These substations can be installed and mounted on skid frame or wheels or Noida.

ld Power range of substations is continuing to evolve to meet the changing needs of our customers. We offer low cost, reliable solutions, which retain a degree of flexibility.

ld Power Package Substations are designed with one of the following arrangements which suits the installation requirement of the customers locations:
» MV Switchgear & LV distribution panel are fixed on the face of the Package substations with the transformer located behind them.
» My Switchgear & LV distribution panel are fixed on opposite sides while the transformer is located between them.
» The face of the package Substation is the LV distribution panel and an outlet of HV bushing. The transformer is located behind. In this case, the MV Switchgear is installed adjacent to the package Substation as a free standing unit.

Advantages :-
» Compact size and simple design
» Robust construction for outdoor and indoor application
» Saves space and easy for installation
» Maintenance free with minimum inter-connection between LV & HV equipment
» Complete safety from unauthorized tapping and power theft
» Flexibility to select equipment and scheme as per client’s unique requirements

Package Substation

ld Power offer range of unitized substation that are available in different models. Durable and compact in size, these substations can easily be shifted to the place where they are required. These substations can be installed and mounted on skid frame or wheels or Noida. ld Power range of substations is continuing to evolve to meet the changing needs of our customers. We offer low cost, reliable solutions, which retain a degree of flexibility. ld Power Package Substations are designed with one of the following arrangements which suits the installation requirement of the customers locations: » MV Switchgear & LV distribution panel are fixed on the face of the Package substations with the transformer located behind them. » My Switchgear & LV distribution panel are fixed on opposite sides while the transformer is located between them. » The face of the package Substation is the LV distribution panel and an outlet of HV bushing. The transformer is located behind. In this case, the MV Switchgear is installed adjacent to the package Substation as a free standing unit. Advantages :- » Compact size and simple design » Robust construction for outdoor and indoor application » Saves space and easy for installation » Maintenance free with minimum inter-connection between LV & HV equipment » Complete safety from unauthorized tapping and power theft » Flexibility to select equipment and scheme as per client’s unique requirements

Online Ups

Ld Power Provided Online Ups manufacturing company,Ld Power are India’s leading and most trusted online ups manufacturer company.We have India’s one of the largest online UPS dealer network.We are selling Online UPS in Noida and in rest of the India since 1998. We are leading home UPS manufacturer company and Online UPS exporter company of India due to our quality and innovative sine wave home UPS and inverter technology. We have largest after sale service network across India for home sine wave ups and home sinewave inverter. Features » Small In size » Low Audible Noise » Excellent Dynamic Characteristics » Very Low Distortion » High Efficiency » Electric Surge Suppression » Easy Installation » Easy Operation » Constant current, Constant Voltage Battery Charger » Fully Isolation from Input to Output Applications » Data Processing » Process Control » Tele communications Systems » Medical Equipments » Instrumentation » Other Sensitive Equipments

Single Phase Servo Stabilizer

For the applications where output voltage tolerance has to be within +_ 1% for the specified input voltage variations, servo stabilizer is an answer. Eldee manufactures servo Stabilizers form 1KVA to 30KVA in single phase,and 10KVA to 3000KVA in three phase.The output voltage stability of Servo voltage stabilizer (SVS) allows the optimum drawing if current by the connected load and as such no extra power is consumed at low and high voltage.This therefore saves electric power to approximately 20% and reduces MDI. Input voltage window can be as per specification of the customer.

Current Transformers

At Eldee, We believe that our clients deserve products which stand for quatity and performance.Hence, while manufacturing our range of instrument transformers at state of the art facilities,we ensure that the performance levels of our products are best in the industry.whe Pn our clients choose Eldee, they are assured enough to focus on their business, and not worry about the products their business uses. Choose Eldee for the total satisfaction. Eldee Products Range:- » Current and Potential Transformers from 0.66KV to 132 KV » Combined CT-PT Unit (Outdoor and Indoor) » Dry Type Resin Cast P.T.s » Dry Type Resin Cast and P.T.s » Interposing C.T.s and P.T.s » Summation C.T.s » Auxiliary C.T.s

FurnaceTransformers

We are providing arc/induction furnace transformers that have the capability to withstand short-circuits. Further, its superior features like low noise, economical operation, compact design etc, have made the range highly popular in the market. We also have ability to customize the range as per the specific requirements of the customers. We offer a qualitative range of furnace transformers that are designed and manufactured using cutting edge technology, meant to be used with arc or induction furnaces. These furnace transformers are widely used in steel plants, aluminum industries , gas factories, calcium carbide and various other industries. These come with various distinguishing factors that provide them superior functioning rate as well as durability. We offer these high-power transformers with automatic on and off cooling facility in various sizes with on load tap changer.

Potential Transformers

Current Transformers

Welcome to L.D.Transformers

OUR MISSION * Through quality assurance and stringent evaluations, provide our customers with accurate data, quality products and consistency in services. * Develop and maintain a supplier/customer relationship based on open communication, mutual trust and respect. OUR VISION * To increase our knowledge and capabilities as a service provider in the transforners and generators. * To become the global supplier/provider of choice who provide the quality products and services preferred by our customers. VALUE ADDED GOALS * Customer Service and Support * Continued Quality Improvements * Leadership and Professional Growth * Innovation and Resource Managers Competitive prices quality products and services.

HT AVR

ELDEE makes Transformers with built-in HT Automatic Voltage Regulator is a revolutionary Landmark in the Industry when it comes to voltage Regulation and Stabilization.Even after the installation of standard distribution transformers the problme of Low / High Voltage on the LT site remains,resulting in improper operation of the electrical machines of a plant.The standard off-circuit tappings of the transformers can correct limited voltage variations and cannot regulate the voltage while in 'on load' condition.Thus,the R&D team at ELDEE developed a smart" way of tackling the problem with Transformers having Built-in HT Automatic Voltage Regulator that operates on load,steplessly. The equipment is basically a combination of HT AVR with a standard distribution Transformer.The fluctuating voltage from'Grid'is initially stabilized by the HT AVR and then fed to the transformer resulting in the constant L.T. Output within + 1% accuracyand the Biggest advantage being the robust design of the equipment which does not demand regular maintenance. Advantages of transformer with built in HTAVR : • Better Efficiency • Reduced Installation Cost • Space Saving • Energy Saving • Protection of Motors • Reduction in Electricity Bill • Low replacement cost Specification : • Capacity : Upto 5000KVA • Input Voltage : 8.5 KV=12 KV =3Phase • Output Voltage : 11KV + 1% - HT -3Phase 415 + 1% - LT - 3Phase Technical Advantages of ELDEE Voltage Regulators : • Low replacement cost • Undistorted output characteristics i.e. no wave from distortion. • No Moving Parts On L.T.site and it's mass is extremely low. • Energy Saving • High efficiency (approx.99%) and minimum no-load losses. • Simplicity and Flexibility of design. • On load stepless Voltage Variation • Long service life • Impulse Tested • Regulating coils are wound with rectangular conductors on their edge,thus giving high mechanical strength compared to other designs.

solation Transformers

Any transformer,single or three phase in which primary and secondary are separately wound (double wound) is an isolation transformer as primary and secondary are internally isolated from each other.The power transfer at rated frequency is by transformer action through mutual inductance. The Modern machines and systems need a truly is olated clean power in which any electrical disturbance in the priary side is effectively not passed on to secondary side. Therefore an Isolation/Ultra Isolation transformer ensures total electrical and electro satatic isolation local neutral and dedicated earth which are very essential for modern machines.It provides noise or interference free power and prevents transfer & RF and HF disturbances with extensive isolation between primary and secondary.The isolation level with stand HV break down strength of 2.5KV and gives DC galvanic isolation of more than 1000M Ohms.

Servo Voltage Stabilizer

Continuous stable supply of A.C Power is the life line of any sophisticated electronic and electrical system. The performance of these instruments is optimum at the rated voltage. Under voltage generally reduces efficiency,and very low voltage even can force the system to shut down. High voltage shortens the life and even can burn the instruments. ELDEE Servo Voltage stabilizers receive fluctuating AC Voltage of wide range and delivers constant output voltage with ± 1% of the nominal voltage ; it is therefore an excellent remedy for the problems of wide voltage fluctuation.The efficiency is maintained as high as 98-99%.The output voltage stability of our servo stabilizer allows the optimum drawing of the current by the connected load and as such no extra power is consumed at low as well at high voltage.This therefore saves electric power to approximately 20% and reduces MDI(Monthly Demand Index). SVS (servo voltage stabilizer) basically comprises of Auto Transformer (Dimmer State/Roller Contact type) coupled with A.C.Servo Motor, Buck Bust transformer Control card for regulation All these components are interconnected adequately to accomplish the work of stabilization of output voltage of SVS. Use of reliable high quality components alongwith microprocessor controlled circuitry ensures the operation of our Servo Stabilizers flawless.

Ld Power

Introduction L.D.Power Transformers Pvt Ltd. manufacturer & repairer of comprehensive range of distribution & power Transformer including the Transformers for special applications. Quality Policy Quality Assurances an important part of the company's policy and confirming to the IS 2026, BS 171, IEC76, IS11171, IEC 726, & IS 9815 (As Applicable). Product Range We are one of the experienced manufacturer as well as repairer of all special type Transformers from 10 KV A to 5000 KV A in class and servo voltage Transformers. Construction of Product : Core The core is constructed from lamination of Cold Rolled Grain Oriented, low loss electrical sheet steel confirming to the latest International Standard which define its physical characteristics such as freedom from scale, degree of waviness, brittleness, tolerance on thickness, the inherent loss due to hysteretic and eddy currents, the permeability, and the methods to be employed to ensure compliance with lhe specification. Each lamination is coated with both sides with insulation which is unaffected by continuous operation in oil at temperatures normally experienced in Transformer service. The core, which is of interleaved construction, with mitered joint to reduce iron loss and magnetizing current, is designed to have a uniform flux distribution throughout the magnetic circuit. Winding Transformer winding are designed to meet three fundamental Requirements: mechanical, thermal and electrical. They are cylindrical in shape and are assembled concentrically. Paper insulated conductors of high conductivity soft drawn copper used, comply with the latest Indian Standard, both HV & LV winding are wound with adequate bracing and securing tapes in order to accieve a strong, self support structure. Insulation between layers and turns is based upon the impulse test level of the voltage class of winding as specified in IS 2026. Tappings Tapping are brought away from the winding by means of flexible conductors, heavily insulated with paper, and supported by insulated tubes or cleats to prevent movement under service conditions. Tank Construction All tank are fabricated from mild steel which is electrically welded, cooling radiators are welded or detachable depending on the size of the transformers. The cooling radiators are of pressed steel, electrically welded. AII tanks are pressure tested before leaving the fabrication shop of factory. Ovening The ovening of the transformer is carried out in well ventilated, electrically heated ovens for a period determined by electrical testes. The transformer is then fitted with dehydration oil confirming to I S 335. Tests Before dispatch, all transformers are subjected to routine tests in accordance with IS: 2026, or to such tests as the customers specification requires. Benefits Energy Saving under non-liner loads: Pollution of power systems is due to injection of harmonics under non-liner condition. These condition are found in case of pumping application, industrial application like thyrister drives, are furnaces etc. Under such environment will have 5 time greater energy saving than CRGO core transformer. Energy Saving The no load loss is a continuous loss taking place after energisation during the period of operation. In case of amorphous core transformer, no load losses are reduced by 75% when compared with conventional transformer. If we compared the marginally higher initial one pays with saving in the electricity bills, the pay beck in majority of the cases will not exceed 2/3 years. Annual energy savings (Rs) = (NLL of CRGO – NLL of AMT) in Kw x 24(hrs) x 365 (days) x 4.5 per Khw

Vertical Rolling Contact Voltage Regulator

Roller Contact Type Servo Voltage Stabilizer is similar in function as dimmer stat type servo stabilizer.It has essentially auto wound single layer helical coil with rectangular copper strip of appropriate size wound on the laminated core. The spring loaded carbon roller travels the vertical length of the coil track with the help of servo AC motor.The control circuitry sense the output and error signal in norminal output voltage is amplified and controls the servo motor which drives the roller mechanism which in turn sets the nominal output voltage to with an 1% stability. Referred figure. Accessories : (a) Step down transformer,double wound star / delta connected (b) Buck boost,double,wound transformer (c) Auto wound delta connected "ON" Load step less rolling contact type voltage regulator (d) Automotive Control unit consisting of: (i) One elecric voltage relay. (ii) One reversing gerared motor unit . (iii) Two limit switches in order to avoid overrunning highest and lower positions. (iv) chain drive,coupling device and all electrical connection.

Dry Type Transformer

Fire safety and environmental aspects are of increasing importance especially in respect of enerrgy supply.The substitution of oil filled transformers by dry type transformers is one of the most urgent thing to do. These transformers are used when it has to be located near load center and in a fire hazardous place.As there is no oil used in the transformer and special type of fire resistant insulation are used for the windings the fire risk is considerably reduced in this type of transformers. Dry Type Transformers are designed and tested to comply with National and International Standards IS/BIS/ANSI/IEC & IEEE. Salient Features : • High impulse & dyanmic short circuit strength • Good overload capacity • Low partial discharges • Low Losses • No fire hazards • Well suited for populated areas and high rise buildings • High performance Specifications : • Range : 630KVA-5000KVA upto 33KV class • Frequency : 50/60 Hz or as per requirement • Insulation : Class 'F'/Class 'H' • Tab Type : Off circuit tap links/On load tap changer • Enclosure : IP21/IP23/IP33/IP43/IP00 Advantages : • Less space and civil work needed • Maintenance Free • Low cost of installation • Longer life due to low thermal and dielectric ageing

FurnaceTransformers

Rating Upto 5MVA,upto 33kV on Primary side Standards: IS 2026 Types: • Resistance furnace transformers • Arc furnace transformers OFWF • Induction furnace transformers • Submrged are furnace transformers Temperature Class : • 105/220 deg.C • Either oil filled or dry type (upto 11kV) Features • Special arrangement of tappings to get a wide range of secondary voltages and LT Winding for large LT currents. • Either with on-load/motorised off circuit tab changers • Cooling arrangements lik ONAN/ONAF Applications: • Silicon carbide manufacturer • Steel Melting • Heat treatment • Alumina manufacturer

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Tuesday 24 January 2012

Distribution Transfomers

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