Capacitors

Details

Krish Engineers Is Manufacturer & Supplier Of Medium Frequency Water Cooled Capacitors In Ahmedabad, Gujarat. 

Scope

Medium Frequency Water Cooled Capacitors From 1 KV Up To Maximum 5000 Volts, To Maximum 7000 KVAr And Frequency Up To 50 Kilocycles For Indoor Use.

• with Dead Casing, Open Terminal (2 Bushings).
• with Live Casing, Open Terminal (1 Bushing).

Applicable Standards

• IEC 60110-1 Capacitors For Induction Heating & Melting Application.
• IS 9251 Capacitors For Inductive Heat Generating Plants Operating At Frequencies Between 40 And 24000 Hz
• DIN EN 60110-1 Power Capacitor For Induction Heating Installations.
• VDE 05650-9:1999-09

Ratings

• Voltage: Up To 5kV
• Output Capacity: Up To 7200 KVAr
• Frequency: Up To 50 KHz
• Mounting: Suitable For Both Horizontal / Vertical
• Container: Imported Embossed Aluminium Sheet.
• Construction: Live / Isolated (Dead) Container

Safety

Over Pressure Dis-connector Provided With NC Contact.

Tests

Each And Every Medium Frequency Water Cooled Capacitors Are subjected To Routine Tests In Accordance To IEC 60110-1.

• Measurement Of Capacitance.
• Measurement Of Dielectric Loss Angle @ 50Hz.
• Voltage Test Between Terminals
• Voltage Test Between Terminals & Container
• Sealing Test

Features:

Following Are The Saliet Features Of Our Offered Medium Frequency Water Cooled Capacitors

• Low Losses < 0.8 Watts Per KVAr
• World Class Raw Materials
• Manufactured In State Of Art Infrastructure
• Volume Optimized And Highly Reliable
• Trouble Free Long Life Performance
• Environmentally Friendly.

Quality Management System

ISO 9001 Accredited ByTUV.

Safety Regulations

When Installing The Equipment, Relevant IEC Or VDE Recommendations Shall Be Observed.

Quality Management System

ISO 9001, BS 5750 Qualifications EDF (HN 54-5-05), CSA

Altitude

Medium Frequency Water Cooled Capacitors are Designed To Operate At Altitudes Not Exceeding 1500 Mtrs.

Impregnant

The Medium Frequency Water Cooled Capacitors are Impregnated With A NON-PCB Based Fluid Which Is Jarylec C-1 01. This Dielectric Fluid Is Environmentally Acceptable, Eliminates Health And Environment Hazards.

Dielectric

An Imported All Film Dielectric Is Used And Consists Of Polypropylene In The Form Of Bi-axially Oriented Film, Hazy On Both Sides, And In 2 Or 3 Layers With End And Edge Folded Aluminum Foil As Electrodes.

Dielectric Losses

Dielectric Losses@ 50 Cis In Fresh Condition Are Approx. 0.2 To 0.3 Watts / Kvar Up To 5 KHz, And 0.5 Watts / Kvar Up To 50 KHz And Reduce After 500 Operating Hours To A Stable State. The Dielectric Losses, Depending On Capacitor Design, Shall Be Added To Losses Caused By:

• Internal Discharge Resistors
• Internal Connections

Permissible Overloads

Maximum Permissible Voltages Capacitors Are Designed For Operation At Voltage Levels According To The Following Table.

The Amplitudes Of The Over Voltages That Can Be Tolerated Without
significant Deterioration Of The Capacitor Depend Up On The Duration, The Total Number And The Capacitor Temperature.

Discharging

Each Capacitor Unit Shall Be Provided With Means Of Discharging To 75V Or Less.

Switching Over Voltages

The Residual Voltage On A Capacitor Prior To Energization Shall Not Exceed 1 0% Of The Rated Voltage.

Maximum Permissible Currents

Capacitor Units Will Be Suitable For Continuous Operation At An R. M. S Current Of 1.30 Times The Current That Occurs At Rated Sinusoidal Voltage And Rated Frequency, Excluding Transients.

Manufacturing And Quality Control

Imported Bi-axially Oriented Double Hazy Polypropylene Film And 99.9% Pure Aluminum Foil Are Used As Dielectric And Electrode. Wrinkle Free Winding Of The Elements Is Carried In An Class 100 Environment On A Semi Automatic Winding Machine With Edge And End Folding Of The Aluminum Foil. This Is To Eliminate Overvoltage Stress At The Edges Of The Buried Area Of The Foil.

Each Wound Element Is Tested For Dry DC Overvoltage With Stand For Pin Holes And Adequacy Of Margins Between AI Foils. Numbers Of Elements Are Interconnected In Series - Parallel To Achieve The Desired Capacitance And Designed Voltage Rating Of The Capacitor.

The Dry Pack Is Wrapped With Several Layers Of High Quality Insulating Paper Before Inserting It Into A Pre Treated / Degreased Aluminum Container And The Top Lid Is Welded By Semiautomatic Pulsed TIG Welding Machine.

The Aluminum Sheet Used For Fabricating Containers Is Imported, Manufactured Of A Special Alloy With Its Surface Embossed. All Metal Parts Copper And Brass Are Silver Brazed To Ensure Homogeneous Joint.

Porcelain Bushings Of Desired BIL Are Leak Proof Fitted On The Lid As Required. The Terminals Are Manufactured From Extruded Brass And The Water Cooling Pipe Is Of 99.99% Pure Electrolytic Grade Annealed Copper And Pressure Tested For Leaks Before Fitting On The Pack. On Specific Request Of Client, Imported Over Pressure Switches Are Also Fitted On The Capacitors.

All The Joints Are Tightened With Torque Wrench And Are Locked To Ensure They Remain Perfectly Tight Always. The Capacitors Are Then Loaded In A PLC Controlled Autoclave For Uniform Heating @85°C And Drying Under Vacuum Of 0.001 Torr For A Given Period. After Confirming The Quality Of Drying By Precision Online Monitoring Instruments, The Capacitors Are Then Impregnated Under Vacuum With Highly Purified And Degassed Jarylec C- 1O1. The Capacitors Are Then Subjected To All Routine Tests In Accordance To IEC-60110-1.

Life Expectancy

Based On The State Of Art Plant& Machinery, Quality Of Raw Materials Used, Manufacturing Under Strict Quality Control And Process Using Precision On Line Instruments, And Elevated Over Voltage Test Results Under Extreme Temperatures, Capacitors Are Assured Of Minimum 20 Years Life.

Electrical Tests

Each And Every Medium Frequency Water Cooled Capacitors Are subjected To Routine Tests In Accordance To IEC60110-1.

• Measurement Of Capacitance.
• Measurement Of Dielectric Loss Angle @ 50Hz.
• Voltage Test Between Terminals 4 Vn For 10 Secs.
• Voltage Test Between Terminals& Container 2.15 Vn.
• Sealing Test @ 80°C For 2hrs.

Details

Features

• Bi-axially Oriented Both Side Hazy(rough) Polypropylene Film To Ensure Good Oil Impregnation
• Capacitor Grade Aluminum Foil For High Current Carrying Capacity
• No Reduce In Output
• Low Losses < 0.3 Watts Per KVAr
• Suitable For Flexi Banking
• High Peak Inrush Current Withstand Capability
• Specially Vacuum Processed, Oil Impregnated Design
• Suitable For Frequent Switching Operation

Details

General Information

Magnewin Make Capacitors Are Manufactured To Comply IEC 60871 And BIS 13925 Standards Using Latest Technology, Materials And State Of Art Plant And Machinery.

Experienced And Skilled Workmanship Enable's To Manufacture Highly Reliable And Long Life Performance Capacitors In Line With International Standards.

Applications

• Fixed Power Factor Corrections Using Individual Capacitor
• Dynamic Automatic Power Factor Correction (APFC)
• Tuned And Detuned Passive Filters
• Harmonic Filter Applications With Loads Viz. UPS, VFD, Furnaces And Converters, Etc.

Standard Ratings

• 50,75,100,125,150,175,200,220,250,264, 275,300,350,400,500,750, 1000 KVAr In 10 /3Ø
• Voltage: 3.3, 3.6, 4.2, 6.6, 6.99, 7.2, 7.3, 8, 9.56, 10.56, 11, 11.55,22,24 KV
• Frequency: 50/60 Hz
• Other Ratings Can Be Supplied On Request.

De-tuned Harmonic Reactor

Air Cored, Aluminium Wound, Dry Type Reactors Are Used Along With Capacitors In De-tuned Harmonic Filter Applications.
Rating: Detuned Reactors Are Available In 6% And 13 % Ratings.

Features

• Compact Size And Convenient Mounting
• Low Losses
• Low Noise Level
• Tested As Per IS 5553 And IEC 60076 - 6
• Environmentally Friendly.
• Trouble Free Long Life Performance
• Volume Optimized And Highly Reliable
• Manufactured In State Of Art Infrastructure
• World Class Raw Materials

Testing

All The Capacitors Are Tested As Per IEC 60871 And IS 13925 Standards In Our Well-equipped In House Test Laboratory. Magnewin Capacitors Are Type Tested At Regular Intervals As Per IEC 60871 And IS 13925 Standards. Magnewin Capacitors Have Also Been Endurance Tested As Per IEC 60871-2 At NABL Accredited Independent National Laboratory.

Protection

Each Element Is Protected With An Individual Encapsulated Fuse Complying With IEC 60871-4. The Sizing Of Fuse Is Calculated Using Specially Developed Software. Internal Fuses Are Designed And Placed To Isolate Only The Faulty Element Without Affecting The Adjacent Healthy Element, Allowing Uninterrupted Operation Of The Capacitor Unit And The Bank. Magnewin Has Developed The In-House Test Facility To Conduct The Internal Fuse Test In Accordance To IEC 60871- 4. External Fused Capacitors Can Also Be Supplied On Specific Request.

Capacitor Banks / MV APFC Panels

Indoor Sheet Metal Cubicles Up To 33 KV For Switched Capacitors / Harmonic Filters / Automatic P F Control Panels And Structural Open Type Substation Banks Up To 145 KV Network Are In-house Fabricated And Assembled.