Usha Capacitors Limited - Welcome to Usha Group of · PDF file · 2016-04-21Usha...

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Excellence for more than Innovation and Two Decades www.ushapower.com +91 88260 18055 [email protected] Usha Capacitors Limited The Next Generation Engineering for Power Efficiency

Transcript of Usha Capacitors Limited - Welcome to Usha Group of · PDF file · 2016-04-21Usha...

Excellencefor more than

Innovation and

Two Decades

www.ushapower.com +91 88260 [email protected]

Usha Capacitors LimitedThe Next Generation Engineering for Power Efficiency

Welcome to the world of “Usha Power” make Industrial Capacitors for

Power Factor Improvement

PreludeWe at Usha Power want everyone to have scale. In addition, in power distribution with

access to Reliable, Efficient and Quality Low and Medium Voltage Networks, PFC

Energy, which is Sustainable. We are focuses on the Power Flow (CosФ) and the

committed to innovate ways and means to optimization of Voltage stability by address these needs and consequently, We generating reactive power – to improve as the Leader in Energy Saving Technology, voltage quality and reliability at distribution. provide the most relevant, state-of-the-art This will ensure not only enhancing Power technology solution of Power Factor Quality but also Improvement of Power Improvement through our wide range of Factor thus saving energy cost and fast Products. “Return On Investment” and Usha Power is

available at your back and call to provide The availability of Uninterruptable Quality you this service round the clock. Electrical Power and saving of Energy is the

need of the hour. Simultaneously,

awareness for the same is also increasing

globally.

To achieve these set goals, Power Factor

Correction Capacitors (PFC) and Harmonic

Filters are to be installed on an accelerating

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Usha PowerShunt Capacitor

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Usha PowerShunt Capacitor

Incorporated as Usha Sales Corporation in 1992 UCL is a leading manufacturer of LV/HV Power

to undertake marketing of Electrical Capacitors Capacitors under the commercial brand name

in Eastern Part of India, based in Kolkata (then of “USHA POWER”. Our Broad portfolio

Calcutta). The company changed its includes Capacitors, Series reactors, APFC

constitution in the year of 2003 and formed as Relays, APFC Harmonic Filter, Thyristor

Usha Capacitors Pvt Ltd. Later, in the year 2004 Switched Harmonic Panel. As an innovative

Usha ventured into Electrical Turnkey Project technology- driven company, Usha focus

Execution Business with the name of, Usha technologically on demanding growth markets

Techno Power Pvt. Ltd. under the flagship of in the areas of Steel,

USHA GROUP. Power, Cement and

o t h e r H e a v y

Usha Group, the first generation business Industries. We offer

entrepreneur with over two decades of our partners both

experience in Electrical Capacitors and standard Capacitors

Electrical Turnkey Projects has achieved an as well as application-

exponential growth and success in the span of a specific solution.

very few years. With this success story behind,

USHA has designed, engineered, manufactured Usha became a coveted Usha Capacitors Ltd.

and marketed products in India and abroad. We in 2014.

are continuously strengthening our global

research and development network by The group has completed and successfully

expanding R & D activities at our Plant locations.delivered more than 120 Electrical Turnkey

Projects across India and abroad. To achieve

The Capacitor Division of Usha Group is such a feat, Usha Group has been backed by a

engaged in manufacturing of Capacitors team of over 125 competent professionals

according to national/ international standards. including highly qualified Engineers, MBAs etc.

“Usha Power” Make Capacitors are tested by Additional strength of Usha Group is its strong

CPRI (Bengaluru), ERDA (Vadodara), NTH infrastructure and high growth potential. Usha

(Kolkata). We are manufacturing products as per Capacitors Ltd (UCL) is an ISO:9001-2008 /

BIS/IEC standards and got ISI and CE 14001-2004 Certified Company.

certifications as well.

Introducing the CompanyProfile of a Leader

ISO:9001-200814001-2004Certified Company

The GroupComprises of the following 4 Companies

USHACAPACITORSLIMITED

UshaTechnoPowerPvt. Ltd.

Usha CapacitorsIndustrialCorporation

UshaElectricalLimited

Usha Capacitors Limitedinvolved in Designing, Engineering, Manufacturing of LV Shunt Capacitors, HV Capacitors, Surge Capacitors, Series Reactors (HV & LV), Furnace Duty Water Cooled Capacitors, Thyristor Switch, Vacuum Contactor.

Usha Techno Power Pvt. Ltd.engaged in Designing, Engineering, Manufacturing and Supplying of Electrical Panel Boards like, LDB, PDB, Control Desk, Bus Duct up to 33 kV, Drives Panel, VVFD Soft Starter Panel, AMF & Capacitor Control Panel, DG Synchronization Panel, PCC Panel, PLC Automation Drive Panel, Junction Box, Harmonic Analysis.

Meter Division, an Independent Strategic Business Unit, operates within the framework of this Company

Usha Electrical Limitedengaged in Electrical Turnkey Projects for High Rise Buildings, Hotels, Textiles Industries, Cement Industries, Power Generation Plants, Steel Industries, Chemical Industries, Mines, Agro-based Industries, Cold Storage, Bottling Plant and Utilities etc.

Usha Capacitors Industrial Corporation engaged in Electrical Consultancy, Energy Audit, Power Factor Management Service, AMC, etc.

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Usha PowerShunt Capacitor

TM

Our Vision:

Our Mission:

Our Objectives:

To be the World-Leader in Capacitor, Reactor, Panel and Breaker Products.

To be the Doyen in Quality and Services for our Valued Customers.

To create Value for all our Stakeholders.

To supply Zero-defect Products and Services to the delight

of the Customers.

To attain all our defined Goals through a Highly Effective, Lean but strong and Fast-Pacing Organization.

To Provide Uninterrupted, Affordable Quality as well as Reliable Products and Services.

To become the most Customer Caring Company worldwide.

To be a Thousand Crore Company in less than 5 years time.

To be the Most Preferred Vendor (MPV) for all our Customers, however small or big.

To ensure growth through innovation by encouraging Ideas, Talent and Value system.

To spearhead excellence in all our Manufacturing/ Business Activities through sincerity and diligent effort of our Employees at all levels.

Our Vision,Mission & Our Values

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Usha PowerShunt Capacitor

Guided byStrong Values

At Usha Group, our entire operation revolves around because our people are a treasured resource and that one objective which is: h a s w o r k e d

wonders with our Exceeding all Logical Expectations & Customers as Meeting Diverse Needs of our Customers and well as other Stakeholders. this focused approach influences every facet of the I hope our portal way we Develop, Manufacture and Install the extensive c r e a t e s a n range of products sought by our customers;opportunity for o u r v a l u e d to make our service impressive and memorable for visitors around our clients we, continuously innovate with practical the world to learn solutions that breathe new vitality into daily more about our interactions. l e a d i n g - e d g e operations, electrifying performances, strategies, There are exciting, yet challenging times at Usha Power services, sustainability, initiatives and values. This to which we ponder substantially and we continue to expression is part of the external manifestation of our set benchmarks in the field of innovation, technology commitment to servicing the Electrical Industry as; and engineering on real time basis. Usha has been Usha is One Stop Shop for all your Electrical needs. playing a major role in nation building since inception.

In the first place, by conducting Energy Audit in the I take this opportunity to express my gratitude and nook and corner of the country, bringing out clearly appreciation to all the stakeholders of Usha Power, drastic improvement needed in the Quality of Power who have always been demonstrating their solidarity in supply. We do these by improving the Power Factor of their association with us.the electricity supply at Consumers' end as well as

reducing the Transmission and Distribution losses on My sincere thanks to all our Global Associates, the Supply side. Financing Partners, Vendors, Customers, Departments In addition to this, we have also been handling our of Governments, Local Authorities, and most Corporate Social Responsibility (CSR) as one of our importantly, my dear Colleagues of Usha Power.prime responsibilities towards the society as a

business principle and as a matter of humility.

At Usha Power we strongly believe in “team-playing”

I feel privileged in penning this message as the CEO of Usha Group of Companies, an

organization whose seeds were sown in the early nineties. Over 2 decades, Usha has

grown significantly through a combination of technical excellence and strategic

acumen ship and today, we are one of the leading Industry-ready Electrical

Equipment Manufacturers in the country.

Whilst Capacitors and Panel remain at the heart of what we do, we have also

developed and expanded the range of services like Electrical Installation as well as

Design, Engineering and Turnkey Project Management along with Annual

Maintenance Contract and Energy Audit.

Focus on Being the BestCEO’s Message

M PandeyCEO

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Usha PowerShunt Capacitor

Our employees are specialists in their fields. They bring a strong service ethos to everything they do. They take pride

and ownership in the jobs they do. At Usha, we bring passion, pride and experience together.

We pull together the right people, processes and expertise to take service from “good enough” to “great”. We apply

the best-in-class practices, domain knowledge and expertise, proven technologies, and innovation to assist our

clients in responding to new mandates and expanded missions. Usha's clients come back repeatedly with

confidence that we have the expertise to take service delivery to the next level of performance. We know how to

make services run smoother, smarter and more efficiently.

We have earned a reputation for collaborating with government and non-government agencies and have been

entrusted with delivering vital services for the Government, Leading Private and Public sector Organizations across

the world. The key to that success has been the trust of our customers. We have a history of designing and deploying

long-term solutions that has been generating meaningful outcomes since inception.

Our Employees

Our Structure

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Usha PowerShunt Capacitor

FINANCECOLLABORATION& ACQUISITION LRP CRM

VP:WORKS

VP:NEW DELHI

CMDBOARD OFDIRECTORS

COO

One Stop SolutionWide Range of Products

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Water Cooled Capacitors

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HT Power Factor C

ontroller

APFC Relay

ProductsLow Voltage CapacitorsMPP Standard Design CapacitorsMKP Gas Filled Heavy Duty TypeHeavy Duty Hexl Jelly Filled TypeSuper Heavy Duty Hexl Type [Oil Filled/Jelly Filled/Gas Filled]App Capacitors [BOPP Film +Foil Design] OilFilled Single/Double Layer TypeMixed Dielectric Capcitors

FILM + FOIL DESIGN from 2.2 kV to 24 kV in single unit

Automatic Pad Mounted MV Capacitors Bank upto 11 kV

Medium Voltage Capacitors

6% / 7% / 14% Tuned and Detuned Reactors

MV Current Limiting Reactors of 0.2%

MV Harmonic Filter Reactors Alumunium

Wound Dry Air Core Type of 6%

LV/MV Series Reactors Copper wound /Aluminum Wound

Micro Processer Based APFC RelaysFrom 4 Step to 6, 8, 10, 12, 14, 16 Stage

HT APFC Relay

Water Cooled CapacitorsMV High Frequency Upto 1000 Hz

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Usha PowerShunt Capacitor

High Voltage CapacitorsSVC Upto 700 kV

How Reactive Power is Generated?

Reducing Power Factor Cost

Factor approaches 1 the reactive (nonworking) Power

approaches 0.Every Electric Load that works with magnetic fields

(motors, chokes, transformers, inductive heating, arc

welding, and generators) produces a varying degree of

electrical lag, which is called inductance. This lag of

inductive loads maintains the current senses (e.g.

positive) for a time even though the negative-going

voltage tries to reserve it. This phase shift between

current and voltage is maintained, current and voltage

having opposite signs. During this time, negative Power

or Energy is produced and fed back into the network.

When current and voltage have the same sign again, the

same amount of energy is again needed to build up the To understand Power Factor, visualize a horse pulling a magnetic fields in inductive loads. This magnetic reversal railroad car down a rail road track. Because the rail road energy is called Reactive Power. track are uneven, the horse must pull the car from the In AC networks (50/60 Hz) such a process is repeated 50 side of the track. The horse is pulling the rail road car at or 60 times a second. So an obvious solution is to briefly an angle to the direction of the car's travel. The Power store the magnetic reversal energy in Capacitors and required to move the car down the track is the working relieve the network (Supply Line) of this Reactive Energy. (real) Power. The effort of the horse is the total (apparent) For this reason, Automatic Reactive Power Power.compensation systems (Detuned/Conventional) are

installed for large loads like industrial machinery. Such Because of the angle of the horse's pull, not all of the systems consist of a group of Capacitor units that can be horse's effort is used to move the car down the track. The cut in and cut out and which are driven and switched by a car will not move side ways; therefore, the side wards pull Power Factor Controller. of the horse is wasted effort on working (reactive) Power.

Low Power Factor is expensive and inefficient. Many For example, using the Power triangle illustrated below, ifutility companies charge you an additional fee if your Power Factor =Power Factor is less than 0.85. Low Power Factor also

reduces your electrical system's distribution capacity by

increasing current flow and causing voltage drops. This

fact sheet describes Power Factor and explains how you

can improve your Power Factor to reduce electric bills

and enhance your electrical system's capacity.

The angle of the horse's pull is related to Power Factor,

which is defined as the ratio of real (working) Power to

Apparent (total) Power. If the horse is led closer to the

center of the track, the angle of sidepull decreases and

the real Power approaches the value of the Apparent

Power. Therefore, the ratio of real Power to Apparent This indicates that only 70% of the current provided by

Power (the Power Factor) approaches 1. As the Power the electrical utility is being used to produce useful work.

A Few Words Behind High QualityCost Effective Power

Real Power = 100kW

Power Factor=

ReactivePower=100kVAR

ApparentPower=142kVA

Real Power=100kW andApparent Power=142kVA thenPower Factor=100/142=0.70 or 70%

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Usha PowerShunt Capacitor

Working (real) Power

Total(apparent)Power

Cause of Low Power Factor

Real Power (Measured in Kilowatts, kW)Reactive Power, the non working Power caused by the magnetizing current, required to operate the device (measured in kilovars, kVAr)

Why Improve Your Power Factor?

Low Power Factor is caused by inductive loads (such as transformers, electric motors, and high-intensity discharge

lighting) which are a major portion of the power consumed in industrial complexes. Unlike resistive loads that create

heat by consuming kilowatts, inductive loads require the current to create a magnetic field, and the magnetic field

produces the desired work. The total or apparent power required by an inductive device is a composite of the

following:

Reactive Power required by inductive loads increases the amount of Apparent Power (measured in kiloVoltamps,

kVA) in your distribution system. The increase in reactive and apparent Power causes the Power Factor to decrease.

Some of the benefits of improving Power Factor are as follow:The utility bill will be lower. Low Power Factor requires an increase in the Electric Utility's Generation and

Transmission capacity to handle the Reactive Power component caused by inductive loads. Utilities usually

charge a penalty fee to customers with Power Factors less than 0.85. The penalty can be avoided and

rebate can be earned instead by increasing Power Factor to 0.999 LAG.

Electrical system's capacity will increase.

Reduction in kVA demands resulting in saving in power bill.

Reduction in current drawn, thereby ensuring lower load on electrical installation like transformers, cables,

switchgears and captive generating sets.

Enables connection of additional loads within the existing sanctioned load.

Reduction of voltage drop, thereby improving performance of electrical equipment/machinery.

No attention required for Operating & Maintenance.

Payback period normally within 6 months.

Improvement can be made from the smallest to the largest equipment.

Installation cost is nominal and simple, without disturbing normal production and plant operation.

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Usha PowerShunt Capacitor

What is Harmonic?Harmonics are produced in the operation of electric loads with non-linear voltage/current characteristics (e.g.

rectifiers and inverters for drives, welding apparatus and uninterruptible power supplies). Harmonics are sinusoidal

voltages and current with higher frequencies of a multiple of the 50 or 60 Hz line frequency. In low-voltage three-

phase systems the 5th and 7th harmonics are especially troublesome. Detuned PFC should be used in systems

subject to harmonics. This represents a series resonant circuit of Power Capacitor and reactor. The circuit is tuned

so that the series resonant frequency is below the lowest harmonics appearing in the system. This produces an

inductive response to all frequencies above the series resonant frequency, avoiding resonances with system

inductances. Depending on the selected series resonant frequency, part of the harmonic current is taken up by the

detuned PFC system. The remainder of the harmonic current flows into the super ordinate system. The use of

detuned PFC thus contributes to reducing voltage distortion through harmonics and lessens the disturbing effect on

proper operation of other electric loads.

Most international standards limit THD-V on LV side to 5%. However it has to be noted that in many grids these

levels are exceeded and even lower distortion, e.g. 3-4% THD-V can generate extreme over currents in case of

resonance condition.

Maximum over currents as specified under technical data of each series must not be exceeded.

Resonance must be avoided by appropriate panel design. Resonance may cause very high over currents which can lead to Capacitor failures and worst case to explosion and fire.

Harmonics

Harmonicallydistorted waveform

Equals

3rd Harmonic

Plus

FundamentalPure Sinewave

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Usha PowerShunt Capacitor

These filters are used when the main objective is not the reactive power compensation at the fundamental

frequency, but to reduce the harmonic distortion in the supply system.

Interferences in telecommunications

Distortion on the mains voltage

Disturbances in Electronic Systems

Erratic operation of control and protection relays

Failures in transformers and motors, due to overheating caused by losses on the core.

Overheating of protective fuses to the point where a minor spike on the line causes them to blow.

It should be pointed out that the impedance of all the filters is capacitive below its tuning frequency, whereby

they also contribute, even if in a small scale, to the reactive power compensation at the fundamental frequency.

Installation of filters produces a modification on the topology of the electrical supply system. For this reason, the

design of filters must be done with regard to an accurate analysis and study of the whole system.

3rd Harmonic Filter HBF-T

Isolation Filter

Absorption Filter HAF

High pass Filter HPF

Active Filter SINAF

PFC focuses on the Power Flow (Cos φ) and the optimization of voltage stability by generating reactive Power-

to improve voltage quality and reliability of distribution level.

Among the problems caused by Harmonics and which may make their suppression necessary,are the following:

According to the application, there are different types of filters:

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Usha PowerShunt Capacitor

ms151050

0

-50

-100

50

100R S T

20

L.V. CapacitorsAPP BOPP [FILM + FOIL]

The use of double sided hazy film, vacuum drawing and impregnation

with non toxic non- PCB bio degradable oil under very high vacuum

ensures an electrically stable Capacitor with excellent partial

discharge characteristics Film + Foil design with high grade steel

tank.

Non Self Healing Type, IS 13585/1994/1998

5 to 50 kVAr in single unit and above in Bank

415/440/575/690/850/950 VAC. 50 Hz.

3 Ph, Delta Connected

Hazy all Polypropylene Film +Foil Type

Non self healing Type

Operated at high temperature

Static Indoor type and oil filled, box type,

(CRCA Enclosure)Mild Steel

100% Oil filled Non P.C.B Non Toxic Oil

Highest inrush current withstanding capacity

Strongly recommended to use at extreme

high temperature environment.

99.99% Pure Aluminum Foil

Suitable for odd Harmonics load

Weather Proof Powder coating

Maintenance Free

Explosion Proof

Expected Life of Capacitors12- 15 Years

Losses < 0.2 /5 watts kVAr

No drifting in kVAr value upto limited period

No Oil Leakage and Maintenance free

Fixed & Automatic P.F. Correction with Tuned & Detuned Filters

Indoor use filter applications

It is recommended to use at extreme high temperature

environment like Foundries & Steel Industries, Cement Industries,

Textile Industries.

Specification:

Range:

Features

Application

Note for Harmonic Loads ,525 V Capacitors with Series Reactors are recommended.

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Usha PowerShunt Capacitor

Technical Details:Three Phase 50Hz APP Type CapacitorStandard Non Self healing Type ,IS 13585/1994/CPU

Capacitance tolerance ± 5 %

Out put kVAr 5 to 25 kVAr

Rated Current 6.17 Amp to 32.5 Amp

Operating Voltage 415 VAC

Rated Voltage 440 VAC (Other Voltages as request)

Frequency 50Hz

Temperature Range-Ambient temp category -25/D

Dielectric Losses <0.2 W/kVAr

Total Losses <0.50W/kVAr (inclusive discharge resitors)

Maximium Over Voltage in accordance with above standards

Ucn+10%(upto 8hrs daily) Ucn+15%(upto 30mints daily), Ucn+20%(upto5mints), Ucn+30%(upto 1mint)

Maximium over current 1.5 X IN

Peak Inrush Current 250 X In

Tolerance on Capacitance -5/+10%

Max THD in Voltage Voltage should not excceds above over voltage value

Max THD IN Current Cureent should not excceds above over current value

Discharge resistance As per IS 13585/1994/CPU

Connection Delta

Casing Box Type CRCA ENCLOSURE (Mild Steel)

Disconnection System All Phase - overpressure disconnector fuses

Dielectric 100 % oil filled Non PCB , Non toxic Oil

Voltage test between Terminals 2.15xUcn,AC,2 seconds

Voltage test between terminals to Case 3000VAC,2 seconds

Protection IP20

Permissible relative Humidity Max 95%

Expected Life 12-15 years

Altitude 2000 m above sea level

Impregnation Hazy All Polypropylene film + Foil Type

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Usha PowerShunt Capacitor

Heavy Duty Double Dielectric[MKP Capacitor]

Self Healing Capacitors with low losses Metalized Polypropylene

Dielectric without liquid impregnates. They have an over pressure

disconnection system that discounts the Capacitor in case of any

internal failure.

Self Healing Type, IS 13340/13341/IEC : 60831-1

5 To 25 kVAr For 415/440V/525V/650 V Ac, 50Hz, 3Ph

Fixed PF. Correction

Automatic P.F. Correction

Harmonic Filter System

Dynamic PFC systems

Metalized Polypropylene (MKP) Film Design.

Heavy Edge Metallised Multi layer MPP Film.

Box Type [Mild Steel]

Pressure Disconnector to Internal Elements

Better heat dissipation

Explosion proof design (Over pressure Disconnector)

Low losses due to advanced winding and zinc spray equipments.

Weather Proof

Powder Coating Design

Jelly impregnate for proper cooling

Low weight and compact volume

Working Expectancy Life 150,000 hrs

Specification:

Voltage Range:

Application

Features:

Applications: Inductive Loads, Steel Plants, Textiles,Cement Industries, Building Complexes, APFC Panels,Harmonic Filter Panels etc.Cement Industries

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Usha PowerShunt Capacitor

Standard Self healing Type ,IS 13340/13341/IEC : 60831-1

Capacitance tolerance ± 5 % As per Standards

Out put kVAr 5 to 25 kVAr

Rated Current 6.2 A to 32.75 Amp

Rated Voltage 415/440 Vac ( other ratings on Request)

Frequency 50Hz

Temperature Range-Ambient temp category -25/D

Dielectric Losses <0.2 W/kVAr (Without Discharge Resistors)

Total Losses <0.50W/kVAr (inclusive discharge resitors)

Maximium Over Voltage in accordance with above standards

Ucn+10%(upto 8hrs daily) Ucn+15%(upto 30mints daily), Ucn+20%(upto5mints), Ucn+30%(upto 1mint)

Maximium over current 1.5 X IN

Peak Inrush Current 250 X In

Tolerance on Capacitance -5/+10%

Max THD in Voltage Voltage should not excceds above over voltage value

Max THD IN Current Cureent should not excceds above over current value

Discharge resistance External ,1 minutes,50 V

Connection Delta

Casing CRCA Square BOX Casing

Disconnection System Pressure Disconnector to interal elements.

Dielectric Jelly Field Type

Voltage test between Terminals 2.15xUcn, AC, 2 seconds

Voltage test between terminals to Case 3000VAC,2 seconds

Protection IP20

Permissible relative Humidity Max 95%

Expected Life 150000 operating hours

Altitude 2000 m above sea level

Impregnation Jelly/Oil Impregrnant

Enclosure Indoor Mounting

Mounting Position Vertical

Mounting & Earthing Vertical or Wall mounting

Technical Details:Three Phase 50Hz Double Dielectric Capacitor

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Usha PowerShunt Capacitor

Super Heavy Duty Type Capacitor

Self-Healing Capacitors fitted in a rectangular sheet steel plate

enclosure having discharge resistors connected to the terminals,

which are protected by the cover.

They are suitable for the individual compensation of inductive

loads and in the construction of small Automatic Capacitor Banks.

Fixed PF. Correction

Automatic P.F. Correction

Filter Application System

Dynamic PFC

Tuned and Detuned Harmonic Filter

Self Healing Type, IS 13340/13341/IEC : 60831-1

5 to 25 kVAr For 440V/525V/650 V Ac, 50Hz, 3Ph

Metalized Polypropylene (MKP) Film Design

Heavy Edge Metalized Multilayer MPP

CRCA enclosure Cylindrical Casing Design

Jelly/Oil impregnation given cooling effect

Explosion Proof Design

Low losses due to advanced winding and zinc spray

equipments.

Working Expectancy life 150,000 hours

Backed by German Technology

Application

Specification:

Voltage Range:

Features:

Applications: Inductive Loads, Steel Plants, Textiles,Cement Industries, Building Complexes, APFC Panels,

Harmonic Filter Panels etc.Cement Industries

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Usha PowerShunt Capacitor

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Usha PowerShunt CapacitorTechnical Details:

Three Phase 50Hz Super Heavy Duty Type CapacitorStandard Self healing Type ,IS 13340/13341/IEC : 60831-1

Capacitance tolerance ± 5 %

Out put kVAr 5 to 25 kVAr

Rated Current 65.5 Amp6.2 A to 32.75 Amp

Rated Voltage 415 / 440 Vac( other ratings on Request)

Frequency 50Hz

Temperature Range-Ambient temp category -25/D

Dielectric Losses <0.2 W/kVAr (Without Discharge Resistors)

Total Losses <0.50W/kVAr (inclusive discharge resitors)

Maximium Over Voltage in accordance with above standards

Ucn+10% (upto 8 hrs daily) Ucn+15% (upto 30 mints daily),Ucn+20% (upto 5 mints), Ucn+30% (upto 1mint)

Maximium over current 1.5 X IN

Peak Inrush Current 250 X In

Tolerance on Capacitance -5/+10%

Max THD in Voltage Voltage should not excceds above over voltage value

Max THD IN Current Cureent should not excceds above over current value

Discharge resistance External 1 minutes,50 v/ 3 minutes 75 V

Connection Delta

Casing Cylindrical (Aluminium Can Type)

Disconnection System All Phase - Over pressure Disconnector Fuses

Dielectric MPP Gas filled with Heavy Edge metalized multilayer MPP

Voltage test between Terminals 2.15 x Ucn, AC, 2 seconds

Voltage test between terminals to Case 3000VAC,2 seconds

Inrush Current 200 X IN

Protection IP20

Permissible relative Humidity Max 95%

Expected Life 150,000 Operating Hours

Altitude 2000 m above sea level

Impregnation Dry Gas filled

Enclosure IP00, On request IP54

Cooling Natural Air Cooled Casing temp max 60 c permitted on top of the Can.

Saftey Features Over Pressure Sensitive 3 Phase disconnector.

Mounting Position Random

Mounting & Earthing M12 X 16 mm threaded stud at bottom of the case with nut & Washer

Heavy Duty HEXL Type Capacitor

Application

Specification:

Voltage Range:

Features:

Fixed PF. Correction

Automatic P.F. Correction

Harmonic Filter System

Self Healing Type ,IS 13340/13341/IEC : 60831-1

5 To 25 KVAr For 440v/525VAC, 50Hz, 3PH

Cylindrical (Aluminium Can Type)

MPP, MKP, Gas, Oil, Jelly Filled Type

Heavy Edge Metalized Multilayer MPP/MKP, Losses <0.2 Watts/kVAr

Working Expectancy Life 50,000 Hours

Backed By German Technology

Metalized polypropylene (MKP) film design

Compact Cylindrical Al. can design

Jelly impregnation given cooling effect

Better heat dissipation

Explosion proof design (internal fuse protection)

Low losses due to advanced winding and zinc spray equipments.

Finger-touch proof terminal connectors.

Applications: All Industrial Loads, Rice Mills, Cold Storage

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Usha PowerShunt Capacitor

Standard Self healing Type ,IS 13340/13341/IEC : 60831-1

Capacitance tolerance ± 5 % As per Standards

Out put kVAr 5 to 25 kVAr

Rated Current 6.2 A to 32.75 Amp

Rated Voltage 415 / 440 Vac( other ratings on Request)

Frequency 50Hz

Temperature Range-Ambient temp category -25/D

Dielectric Losses <0.2 W/kVAr (Without Discharge Resistors)

Total Losses <0.50W/kVAr (inclusive discharge resitors)

Maximium Over Voltage in accordance with above standards

Ucn+10%(upto 8hrs daily) Ucn+15%(upto 30mints daily), Ucn+20%(upto5mints), Ucn+30%(upto 1mint)

Maximium over current 1.8 X IN

Peak Inrush Current 250 X In

Tolerance on Capacitance -5/+10%

Max THD in Voltage Voltage should not excceds above over voltage value

Max THD IN Current Cureent should not excceds above over current value

Discharge resistance External 1 minutes,50 v/ 3 minutes 75 V

Connection Delta

Casing Cylindrical Aluminium Can

Disconnection System All Phase - overpressure disconnector fuses

Dielectric System MPP Gas filled

Voltage test between Terminals 2.15xUcn,AC,2 seconds

Voltage test between terminals to Case 3000VAC,2 seconds

Protection IP20

Permissible relative Humidity Max 95%

Expected Life 50,000 hours

Altitude 2000 m above sea level

Impregnation Inert Dry Gas

Enclosure IP00 ,On request IP54

Cooling Natural Air Cooled Casing temp max 60 c permitted on top of the Can.

Saftey Features Over Pressure Sensitive 3 Phase disconnector.

Mounting Position Random

Mounting & Earthing M12 X 16 mm threaded stud at bottom of the case with nut & Washer

Technical Details: Three Phase 50Hz Heavy Duty HEXL Type Capacitor

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Usha PowerShunt Capacitor

Standard Design Cylindrical Type CapacitorSelf-healing Capacitors fitted in a Cylindrical Aluminum

can having discharge resistors connected to the terminals

which are protected by the cover. They are suitable for

the individual compensation of inductive loads and in the

construction of small Automatic Capacitor Banks.

Self Healing Type, IS 13340/13341/IEC : 60831-1

5 To 25 kVAr For 440V, 50Hz, 3Ph

Fixed PF. Correction

Automatic P.F. Correction

Filter Application System

Dynamic PFC

Tuned and Detuned Harmonic Filter

Cylindrical (Aluminium Can Type)

Working Expectancy Life:- 100,000 Hours.

Explosion Proof Design

Gas Filled

Pressure Disconnector

Heavy Edge Metalized Multi Layer MPP Film/ MKP

Expectancy Life 50,000 hours

Backed by German Technology

Low losses due to advanced winding and Zinc Spray

Equipments.

Specification:

Voltage Range:

Application:

Features:

Applications: Inductive Loads, Steel Plants, Textiles,Cement Industries, Building Complexes, APFC Panels,Harmonic Filter Panels etc.Cement Industries

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Usha PowerShunt Capacitor

Technical Details: Three Phase 50Hz StandardDesign Cylindrical Type Capacitor

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Usha PowerShunt Capacitor

Standard Self healing Type ,IS 13340/13341/IEC : 60831-1

Capacitance tolerance ± 5 % As per Standards

Out put kVAr 50 kVAr

Rated Current 65.5 Amp

Operating Voltage 415 Volt AC

Rated Voltage 525 Volt AC

Frequency 50Hz

Temperature Range-Ambient temp category -25/D

Dielectric Losses <0.2 W/kVAr (Without Discharge Resistors)

Total Losses <0.50W/kVAr (inclusive discharge resitors)

Maximium Over Voltage in accordance with above standards

Ucn+10%(upto 8hrs daily) Ucn+15%(upto 30mints daily), Ucn+20%(upto5mints), Ucn+30%(upto 1mint)

Maximium over current 1.5 X IN

Peak Inrush Current 250 X In

Tolerance on Capacitance -5/+10%

Max THD in Voltage Voltage should not excceds above over voltage value

Max THD IN Current Cureent should not excceds above over current value

Discharge resistance As per IS 13340

Connection Delta

Casing Cylindrical Aluminium Can

Disconnection System Pressure Disconnector

Dielectric Jelly Field Type

Voltage test between Terminals 2.15xUcn,AC,2 seconds

Voltage test between terminals to Case 3000VAC,2 seconds

Protection IP20

Permissible relative Humidity Max 95%

Expected Life 50000 hours

Altitude 2000 m above sea level

Impregnation MPP/MKP Gas, Oil, Jelly filled Type

Enclosure IP00 ,On request IP54

Cooling Natural Air Cooled Casing temp max 60 c permitted on top of the Can.

Saftey Features Over Pressure Sensitive 3 Phase disconnector.

Mounting Position Random

Mounting & Earthing M12 X 16 mm threaded stud at bottom of the case with nut & Washer

H.V. Capacitors

Application:

Features:

Specification:Voltage Range:

Individual PF Correction

Dynamic PFC

Individual PF Correction on three Phase Motor

Individual PF Correction of Power Transformers

Individual PF Correction of group Power Factor correction

Central Power Factor Correction of all Industrial /Inductive Loads

Fixed Type Capacitors Bank

Filter Application System

SVC Application

All film Dielectric is used and consist of Polypropylene in the form of

biaxial oriented film, hazy on both sides, and in two or three layers

with laser cut Aluminum Foil for the electrodes.

The Capacitors are impregnated with a NON –PCB base fluid.

Dielectric Loss approx 0.1W/kVAr

Capacitors are designed ,manufactured and tested to meet the

requirements of IS: 13925-1994,IEC-60871,

Voltage Range – 2.4 kV- 24kV

Frequency - 50 Hz /60 Hz

Corrosion Protection

Maximum Permissible Current [Capacitors unit shall be switched for

continuous operation at an RMS current of 1.30 times the current that

occurs at rated sinusoidal voltage and rated frequency, excluding

transients].

Temp range: 5° C – 55 ° C

Decreasing Voltage drop

Reduces network losses.

Increase Voltage Stability.

Improved Power Quality.

Welded bushing and solid terminal stud prevents fluid leaks.

Folded foil electrodes reduce partial discharge generation.

Extended foils are soldered, providing superior internal connections.

Superior paint system with oven cured process.

Impregnation process under vacuum to ensure lowest possible

humidity content.

Maximum output 1000 kVAr Single phase

Suitable for Indoor/Outdoor applications.

Superior electrical performance

IS: Non Self Healing Type, ISI 13925-1994, IEC-60871,

2.2 kV- 24 kVApplications: All Working Loads, HarmonicFilter, APFC Wind Mill, Solar Power,Steel Plants etc.

23www.ushapower.com

Usha PowerShunt Capacitor

Range 50kVAr to 1000 kVAr in single unit and Banking up to as per requirements.

Standards IS 13925 (part 1-1998/ IEC-60871 (Part-1-1997)

Rated Voltage 1.9kv-24kv

Rated Frequency 50/60 Hz

Maximum Permissible VOLTAGE 110%for 8/12 H in every 24 H

Over Current 130% of rated current

Capacitance Tolerance -5% to +15%

Temperature rise Less than 10 C above ambient

Casing. C.R.C.A/Mild steel square box casing.

ENCL Indoor mounting

Expected Life >2,00,000 Hrs

Ambient Temperature -25 C to +25 C

Cooling Natural air cooled / PXE Oil Cooled.

Dielectric All film+ Foil (APP Type)

Impregnation Non-toxic, Non-Chlorinated, Bio-Degradable Oil

Safety Internal/External Fuses

Technical Details:Three Phase 50Hz HV Capacitors

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Usha PowerShunt Capacitor

Series Reactor LV

For harmonic loads 525 V capacitors with series reactor are

recommended, which also are available in USHA POWER.

Output up to 100 kVAr

Filter factor 5.67 %, 7%, 14 %

Rated Voltage - 440 V, 525 V, 690 V

Tuned & Detuned, Aluminum / Copper wound- Iron Core Dry

Type.

Limiting inrush current during switching

Limiting resonance and protection of Capacitor Banks

Harmonic Banks

Harmonic Filtration

Low losses & low noise level

For Triplen and Non-Triplen Harmonic suppression though

PF Capacitors.

Operating ambient temperature -10 to +50 Deg C

Storage temperature -10 to +75 Deg C

Supply frequency: 47Hz to 53Hz

Current : Continuous RMS value: 150% of the rated current

Range

Type

Features

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Usha PowerShunt Capacitor

SeriesReactor LV

Series Reactor MV/HV

Cast Resin Insulation Technology is sometimes necessary for

Medium Voltage (MV) Reactors, Vacuum Pressure Impregnation

(VPI) technology for the common medium- and low Voltage

applications. Dry-type reactors are fundamental components in

the power quality management, losses reduction, cost alignment

and signal shaping could be translated in an overall cost reduction

for the equipped applications.

Wide Range of Power Ratings, from 1 kVAr to several MVAr

Single-Phase or Three-Phase

Voltages up to 36 kV

Special designs for high frequency applications (up to 25 kHz)

Different types of cooling:AN (air natural), AF (air forced) or WF (water forced)

Any type of enclosure

Features

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Usha PowerShunt Capacitor

Water Cooled Capacitors

Medium and high frequency Water Cooled Capacitors are

specially designed and manufactured for designed for

inductive heat generating plants operating at frequencies

as per the furnace design. These Capacitors are designed

to comply with the specific requirements of each customer.

Most of these Capacitors provide for step changes in kVAr

by virtue of terminated sections within each unit. This

allows for the tuning of the circuit for changing inductive

loads.

- Specially designed to accommodate high

capacity to be easily used for matching circuit of high

frequency induction furnace device.

Output: Up to 6000kVAr

Voltage: Up to 4000V

Frequency: 50 Hz – 1000 Hz

Construction: Dead/ Life Case

Cooling Media: D.M.water

Tapping: As desired by Customers

Application:

Guaranteed Technical Particulars

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Usha PowerShunt Capacitor

Thyristor Switch

We provide our clients with an array of high performance

Thyristor Switch. These are semi conducting device with 4

layers of alternating n and p material. Our range acts as a

switch carrying out the current pulse constantly for as long as

they are forward biased. Thyristor Switches broadly find its

usage wherever high voltage and current are concerned.

These are also used to manage alternating currents to change

its polarity that causes automatic switch off of the device.

High Voltage and Ampere ratings

Unidirectional and Bidirectional transient Voltage

protection

Automatically triggered "off" for specified period of time

RoHS compliant

Glass-Passivated Junctions

High voltage capability up to 1000 V

High surge capability up to 950V

Home appliances - lighting, heating, temperature

control, alarm activation, fan speed

Electrical tools - for controlled actions such as motor

speed, stapling event, battery charging

Outdoor equipment - water sprinklers, gas engine

ignition, electronic displays, area lighting, sports

equipment, physical fitness.

Features

Application

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Usha PowerShunt Capacitor

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Usha PowerShunt Capacitor

PFC SizingCapacitor (kVAr) Selection Chart

Coefficient K

Initial Value

Cosφ

(PF Obtainable)

tgφ

cosφ

0.85

0.86

0.87

0.88

0.89

0.90

0.91

0.92

0.93

0.94

0.95

0.96 0.97 0.98 0.99 1.00

3.18

0.30

2.560

2.586

2.613

2.640

2.667

2.695

2.724

2.754

2.785

2.817

2.851

2.888 2.929 2.977 3.037 3.180

3.07

0.31

2.447

2.474

2.500

2.527

2.555

2.583

2.611

2.641

2.672

2.704

2.738

2.775 2.816 2.864 2.924 3.067

2.96

0.32

2.341

2.367

2.394

2.421

2.448

2.476

2.505

2.535

2.565

2.598

2.632

2.669 2.710 2.758 2.818 2.961

2.86

0.33

2.241

2.267

2.294

2.321

2.348

2.376

2.405

2.435

2.465

2.498

2.532

2.569 2.610 2.657 2.718 2.861

2.77

0.34

2.146

2.173

2.199

2.226

2.254

2.282

2.310

2.340

2.371

2.403

2.437

2.474 2.515 2.563 2.623 2.766

2.68

0.35

2.057

2.083

2.110

2.137

2.164

2.192

2.221

2.250

2.281

2.313

2.348

2.385 2.426 2.473 2.534 2.676

2.59

0.36

1.972

1.998

2.025

2.052

2.079

2.107

2.136

2.166

2.196

2.229

2.263

2.300 2.341 2.388 2.449 2.592

2.51

0.37

1.891

1.918

1.944

1.971

1.999

2.027

2.055

2.085

2.116

2.148

2.182

2.219 2.260 2.308 2.368 2.511

2.43

0.38

1.814

1.841

1.867

1.894

1.922

1.950

1.979

2.008

2.039

2.071

2.105

2.143 2.184 2.231 2.292 2.434

2.36

0.39

1.741

1.768

1.794

1.821

1.849

1.877

1.905

1.935

1.966

1.998

2.032

2.069 2.110 2.158 2.219 2.361

2.29

0.40

1.672

1.698

1.725

1.752

1.779

1.807

1.836

1.865

1.896

1.928

1.963

2.000 2.041 2.088 2.149 2.291

2.22

0.41

1.605

1.631

1.658

1.685

1.712

1.740

1.769

1.799

1.829

1.862

1.896

1.933 1.974 2.022 2.082 2.225

2.16

0.42

1.541

1.567

1.594

1.621

1.648

1.676

1.705

1.735

1.766

1.798

1.832

1.869 1.910 1.958 2.018 2.161

2.10

0.43

1.480

1.506

1.533

1.560

1.587

1.615

1.644

1.674

1.704

1.737

1.771

1.808 1.849 1.897 1.957 2.100

2.04

0.44

1.421

1.448

1.474

1.501

1.529

1.557

1.585

1.615

1.646

1.678

1.712

1.749 1.790 1.838 1.898 2.041

1.98

0.45

1.365

1.391

1.418

1.445

1.472

1.500

1.529

1.559

1.589

1.622

1.656

1.693 1.734 1.781 1.842 1.985

1.93

0.46

1.311

1.337

1.364

1.391

1.418

1.446

1.475

1.504

1.535

1.567

1.602

1.639 1.680 1.727 1.788 1.930

1.88

0.47

1.258

1.285

1.311

1.338

1.366

1.394

1.422

1.452

1.483

1.515

1.549

1.586 1.627 1.675 1.736 1.878

1.83

0.48

1.208

1.234

1.261

1.288

1.315

1.343

1.372

1.402

1.432

1.465

1.499

1.536 1.577 1.625 1.685 1.828

1.78

0.49

1.159

1.186

1.212

1.239

1.267

1.295

1.323

1.353

1.384

1.416

1.450

1.487 1.528 1.576 1.637 1.779

1.73

0.50

1.112

1.139

1.165

1.192

1.220

1.248

1.276

1.306

1.337

1.369

1.403

1.440 1.481 1.529 1.590 1.732

1.69

0.51

1.067

1.093

1.120

1.147

1.174

1.202

1.231

1.261

1.291

1.324

1.358

1.395 1.436 1.484 1.544 1.687

1.64

0.52

1.023

1.049

1.076

1.103

1.130

1.158

1.187

1.217

1.247

1.280

1.314

1.351 1.392 1.440 1.500 1.643

1.60

0.53

0.980

1.007

1.033

1.060

1.088

1.116

1.144

1.174

1.205

1.237

1.271

1.308 1.349 1.397 1.458 1.600

1.56

0.54

0.939

0.965

0.992

1.019

1.046

1.074

1.103

1.133

1.163

1.196

1.230

1.267 1.308 1.356 1.416 1.559

1.52

0.55

0.899

0.925

0.952

0.979

1.006

1.034

1.063

1.092

1.123

1.156

1.190

1.227 1.268 1.315 1.376 1.518

1.48

0.56

0.860

0.886

0.913

0.940

0.967

0.995

1.024

1.053

1.084

1.116

1.151

1.188 1.229 1.276 1.337 1.479

1.44

0.57

0.822

0.848

0.875

0.902

0.929

0.957

0.986

1.015

1.046

1.079

1.113

1.150 1.191 1.238 1.299 1.441

1.40

0.58

0.785

0.811

0.838

0.865

0.892

0.920

0.949

0.979

1.009

1.042

1.076

1.113 1.154 1.201 1.262 1.405

1.37

0.59

0.749

0.775

0.802

0.829

0.856

0.884

0.913

0.942

0.973

1.006

1.040

1.077 1.118 1.165 1.226 1.368

1.33

0.60

0.714

0.740

0.767

0.794

0.821

0.849

0.878

0.907

0.938

0.970

1.005

1.042 1.083 1.130 1.191 1.333

1.30

0.61

0.679

0.706

0.732

0.759

0.787

0.815

0.843

0.873

0.904

0.936

0.970

1.007 1.048 1.096 1.157 1.299

1.27

0.62

0.646

0.672

0.699

0.726

0.753

0.781

0.810

0.839

0.870

0.903

0.937

0.974 1.015 1.062 1.123 1.265

1.23

0.63

0.613

0.639

0.666

0.693

0.720

0.748

0.777

0.807

0.837

0.870

0.904

0.941 0.982 1.030 1.090 1.233

1.20

0.64

0.581

0.607

0.634

0.661

0.688

0.716

0.745

0.775

0.805

0.838

0.872

0.909 0.950 0.998 1.058 1.201

1.17

0.65

0.549

0.576

0.602

0.629

0.657

0.685

0.714

0.743

0.774

0.806

0.840

0.877 0.919 0.966 1.027 1.169

1.14

0.66

0.519

0.545

0.572

0.599

0.626

0.654

0.683

0.712

0.743

0.775

0.810

0.847 0.888 0.935 0.996 1.138

1.11

0.67

0.488

0.515

0.541

0.568

0.596

0.624

0.652

0.682

0.713

0.745

0.779

0.816 0.857 0.905 0.966 1.108

1.08

0.68

0.459

0.485

0.512

0.539

0.566

0.594

0.623

0.652

0.683

0.715

0.750

0.787 0.828 0.875 0.936 1.078

1.05

0.69

0.429

0.456

0.482

0.509

0.537

0.565

0.593

0.623

0.654

0.686

0.720

0.757 0.798 0.846 0.907 1.049

1.02

0.70

0.400

0.427

0.453

0.48

0.508

0.536

0.565

0.594

0.625

0.657

0.692

0.729 0.770 0.817 0.878 1.020

0.99

0.71

0.372

0.398

0.425

0.452

0.480

0.508

0.536

0.566

0.597

0.629

0.663

0.700 0.741 0.789 0.849 0.992

0.96

0.72

0.344

0.370

0.397

0.424

0.452

0.480

0.508

0.538

0.569

0.601

0.635

0.672 0.713 0.761 0.821 0.964

0.94

0.73

0.316

0.343

0.370

0.396

0.424

0.452

0.481

0.510

0.541

0.573

0.608

0.645 0.686 0.733 0.794 0.936

0.91

0.74

0.289

0.316

0.342

0.369

0.397

0.425

0.453

0.483

0.514

0.546

0.580

0.617 0.658 0.706 0.766 0.909

0.88 0.75 0.262 0.289 0.315 0.342 0.370 0.398 0.426 0.456 0.487 0.519 0.553 0.590 0.631 0.679 0.739 0.882

0.86 0.76 0.235 0.262 0.288 0.315 0.343 0.371 0.400 0.429 0.460 0.492 0.526 0.563 0.605 0.652 0.713 0.855

0.83 0.77 0.209 0.235 0.262 0.289 0.316 0.344 0.373 0.403 0.433 0.466 0.500 0.537 0.578 0.626 0.686 0.829

0.80 0.78 0.183 0.209 0.236 0.263 0.290 0.318 0.347 0.376 0.407 0.439 0.474 0.511 0.552 0.599 0.660 0.802

0.78 0.79 0.156 0.183 0.209 0.236 0.264 0.292 0.320 0.350 0.381 0.413 0.447 0.484 0.525 0.573 0.634 0.776

0.75 0.80 0.130 0.157 0.183 0.210 0.238 0.266 0.294 0.324 0.355 0.387 0.421 0.458 0.499 0.547 0.608 0.750

0.72 0.81 0.104 0.131 0.157 0.184 0.212 0.240 0.268 0.298 0.329 0.361 0.395 0.432 0.473 0.521 0.581 0.724

0.70 0.82 0.078 0.105 0.131 0.158 0.186 0.214 0.242 0.272 0.303 0.335 0.369 0.406 0.447 0.495 0.556 0.698

0.67 0.83 0.052 0.079 0.105 0.132 0.160 0.188 0.216 0.246 0.277 0.309 0.343 0.380 0.421 0.469 0.530 0.672

0.65 0.84 0.026 0.053 0.079 0.106 0.134 0.162 0.190 0.220 0.251 0.283 0.317 0.354 0.395 0.443 0.503 0.646

0.62 0.85 0.026 0.053 0.080 0.107 0.135 0.164 0.194 0.225 0.257 0.291 0.328 0.369 0.417 0.477 0.620

0.59 0.86 0.027 0.054 0.081 0.109 0.138 0.167 0.198 0.230 0.265 0.302 0.343 0.390 0.451 0.593

0.57 0.87 0.027 0.054 0.082 0.111 0.141 0.172 0.204 0.238 0.275 0.316 0.364 0.424 0.567

0.54 0.88 0.027 0.055 0.084 0.114 0.145 0.177 0.211 0.248 0.289 0.337 0.397 0.540

0.51 0.89 0.028 0.057 0.086 0.117 0.149 0.184 0.221 0.262 0.309 0.370 0.512

0.48 0.90 0.029 0.058 0.089 0.121 0.156 0.193 0.234 0.281 0.342 0.484

0.46 0.91 0.030 0.060 0.093 0.127 0.164 0.205 0.253 0.313 0.456

0.43 0.92 0.031 0.063 0.097 0.134 0.175 0.223 0.284 0.426

Coefficient K by which to multiply the active energy consumed in kW in order to determine the kVAr necessary for correcting the Power Factor (cosφ0is the initial PF, cosφ1, is the PF obtainable with correction). Recommended final cosφ= 0.95 (greyed column below).

Example:If in an Electricity Bill,

Contract Demand (CD) = 250 kVAMaximum Demand (MD) = 220 kVA

Consider the Power Factor (PF) = 0.92Then,

Required kVAr (Qc) = CD/MD x Existing Pf x Multiplying Factor (from table)= 250 x 0.92 x 0.426= 97.98 (assume 100 kVAr)

For the Improvement of the Power Factor from 0.92 to Unity. We read the factor 0.426 from the table

NOTE: The greater amount of kVA should be taken into consideration for calculation, i.e. If MD > CD then, kVA of MD should be calculated or vice versa.

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Correcting the Power Factor of MV/ LV TransformerIt is always a good idea to ensure a Power Factor correction for MV/ LV transformers, since even when they are operating load less (e.g. during the night) they absorb reactive power, which must be compensated.The exact Capacitor Power necessary may be calculated using the formula below:

Q= l0%.Pn / 100

L0 = load less current(Specified by the transformer manufacturer)Pn = rated power of the transformerAlternatively, if the required data is not available, you can refer to the table below, which differentiates among types of transformers with NORMAL losses.

Power Transformer kVa

Oil Transformer kVAr

Resin Transformer kVAr

10 1 1,5

20 2 1,7

50 4 2

75 5 2,5

100 5 2,5

160 7 4

200 7,5 5

250 8 7,5

315 10 7,5

400 12,5 8

Power Transformer kVa

Oil Transformer kVAr

Resin Transformer kVAr

500 15 10

630 17,5 12,5

800 20 15

1000 25 17,5

1250 30 20

1600 35 22

2000 40 25

2500 50 35

3150 60 50

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