MAGNEWIN ENERGY PVT. LTD.
Capacitors, AC Capacitors, DC Capacitors, Electro Lytic Capacitors, Furnace Duty Capacitors, H.T.Capacitors, Improvement Capacitors, L.T.Capacitors, Metalised Capacitors, MFD Capacitors, MPP Capacitors, Paper Condenser Capacitors, PFC Capacitors, Plastic Film Capacitors, Poly Carbonate Capacitors, Polyester Capacitors, Polypropylene Capacitors, Power Capacitors, Power Electronic Capacitors, Power Factor Capacitors, Power Factor Correction Capacitors, Surge Capacitors, Water Cooled Capacitors
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Medium & High Voltage Surge Capacitors up to 50 Kv.
 

Surge Capacitors ( Medium and High Voltage )


 

Medium & High Voltage Surge Capacitors up to 50 Kv.

Surge capacitors are designed taking into consideration its application to operate under severe stringent system conditions.
Lightning arrestor takes no current from the line during normal operation. When a surge occurs, the arrestor turns on to provide a discharge path. When the surge is gone, the arrestor turns off. The arrestor will handle unlimited amount of current, although amounts exceeding 100 Kilo amps will generally damage the arrestor.
The main advantage of a capacitor is that there is no time delay in turning on as it always conducts. The disadvantage is that the amount of current it can handle is limited to a few amps, depending on the surge voltage. For this reason, an arrestor should always be installed with a capacitor to protect it from intense surges.
Surge capacitors offer the user high transient voltage withstand, long design life, low dielectric loss and rugged construction.
Steep fronted waves (lightning or switching) can cause inter turn insulation failure of rotary machines and transformers. These capacitors provide premium surge protection to high voltage motors, transformers and generators.
Connecting surge capacitors line to ground at the motor terminals prevents this damage. For a more comprehensive protection scheme, surge capacitors may be used in conjunction with surge arrester. This surge pack modifies both the wave shape and magnitude.
These capacitors are virtually maintenance free, needing only occasional cleaning of bushings and paint surface and ensuring adequate tightening of electrical connections.
Surge Capacitors are never protected with any type of fuse or any protection as it self is a protective device.
 
Surge Capacitors ( Medium and High Voltage )
Surge Capacitors Surge Capacitors
Scope
Single Phase capacitors units from 1.1 kV up to maximum 40 kV, 50 or 60 Hz. for indoor or outdoor use.
• with dead casing, open terminal (2 bushings).
• with live casing, open terminal (1 bushing).
The standard microfarad ranges from 0.1 to 0.5
 
Standards
BIS 11548 (Indian Standards).
When installing the equipment, relevant IEC or VDE recommendations shall be observed.
 
Safety Regulations: Quality management system ISO 9001, BS 5750
 
Qualifications : EDF (HN 54-S-05), CSA.
 
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.
 
Impregnant
The capacitors are impregnated with a NON-PCB based fluid is Jarylec C-1 01. This dielectric fluid is environmentally acceptable, eliminates health and environment hazards.
 
Temperature Range
Capacitors are designed for operation between -40°C to +55°C.
 
Dielectric Loss
Dielectric losses in fresh. condition are approx. 0.00005 which reduces after 500 operating hours to a stable state of approx.O.00003.
The dielectric losses, depending on capacitor design, shall be added to losses caused by:
• internal discharge resistors (if fitted).
• internal connections
 
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 a 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 DC Overvoltage with stand and adequacy of margins between AI foils and pin holes.
Numbers of elements are interconnected in series - parallel to achieve the desired capacitance and designed voltage rating of the Capacitor.

 
Standard Preferred Ratings
Capacitors, AC Capacitors, DC Capacitors, Electro Lytic Capacitors, Furnace Duty Capacitors, H.T.Capacitors, Improvement Capacitors, L.T.Capacitors, Metalised Capacitors, MFD Capacitors, MPP Capacitors, Paper Condenser Capacitors, PFC Capacitors, Plastic Film Capacitors, Poly Carbonate Capacitors, Polyester Capacitors, Polypropylene Capacitors, Power Capacitors, Power Electronic Capacitors, Power Factor Capacitors, Power Factor Correction Capacitors, Surge Capacitors, Water Cooled Capacitors
Standard Preferred Ratings
 
The dry pack is wrapped with several layers of high quality insulating paper before inserting it into a pretreated / sheet metal container grade SS 409 L and the top lid is welded by semi- automatic Pulsed TIG welding machine.
Porcelain bushings of desired BIL are leak proof fitted on the lid as required.
The capacitors are then processed in a PLC controlled autoclave for drying and under heat @ 85°C and 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-101.
Then the capacitors are subjected to all electrical tests.
 
Electrical Tests
Each and every capacitor is subjected to Routine tests in accordance to BIS 11548. (Indian Standards).Surge Capacitors have also been type tested successfully. "Magnewin" MV & HV Shunt capacitors have been subjected to Endurance tests in accordance to IEC 60871-2 at
Govt. of India Laboratory, CPRI Bangalore and the same has passed the test successfully.
 

Painting
After completion of electrical tests, the capacitors are then loaded on a overhead conveyorised painting system. The capacitors are first subjected to sand blasting which ensure removal of welding burrs, minor scratches etc. making the surface perfect compatible for painting.

Thermal spray is also done against specific orders. The capacitors are then painted in a painting booth with semi- automatic painting gun with two coats of epoxy primer followed by two coats of epoxy air drying paint. The paint layers are tested at random for adhesion to the surface of the capacitor.

 
Mounting
Surge Capacitors may be mounted vertically or horizontally as required.
 
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
 
We are Leading Manufacturers of Power & Special application Capacitors and our set up is situated at Sangli, Maharashtra INDIA