"SARDA" heavy duty power capacitors are specially designed to meet the requirements of varying loads in industries having higher over currents/voltages and also harmonics. In this design the out put of KVAr value remains the same however there is phenomenal reduction in stress per module as these modules are doubled and connected in series.

Heavy-duty power capacitors are meant to replace conveniently & cost effectively the conventional mixed dielectric/film-foil capacitors.
These Capacitors have been designed to suit fluctuating load conditions and withstand over-voltage and over-currents within permissible limits. These Capacitors are stronger than standard type to withstand required dielectric stress which varies non-linearly.

APPLICATIONS:

• Rolling Mills
• Cement & Sugar Plants
• Induction Furnaces (Power Frequency)
• Welding Systems
• Rectifier Loads
• Power Industries Etc.

SPECIAL FEATURES:

• Higher dielectric thickness
  
• Over voltage and current carrying capacity
  
• Modular design
  
• Very low temperature rise
  
• Longer life

IMPORTANT FACTORS WHICH INFLUENCE QUALITY AND RELIABILITY OF POWER FACTOR CORRECTION CAPACITORS AT END USERS PLACE:

1. Immediately after receipt please check the capacitor and ensure that they are in good condition without any external damages during transit.
   
2. Please ensure that the capacitor terminals are tight & proper while connecting to the load. Any loose contact at the terminals may result in heating and premature failure of capacitors.
   
3. Ensure proper grounding of capacitor before energising it.
   
4. Check discharge resistors connected across the terminals are intact, capacitors must be discharged fully before handling it. Do not charge capacitor without discharge resistor.
   
5. Energise the capacitor and measure voltage & current using a clamp meter in all the phases.
   
6. Proper current rating MCB is recommended in order to avoid over current to the capacitor which may cause fire risk.
   
7. Automatic switching of power capacitor in sequence shall be such that already energised capacitor shall have sufficient time delay circuit for discharge before it is subjected to another re-striking operation. This is an important aspect, which if proper care is not taken may result in over-voltage condition, increasing the risk of capacitor being subjected to high voltage stress level and there by the dielectric insulation breakdown.
   
8. Harmonic distortions in electrical systems are commonly present in loads like thyristor controlled DC drives, rectifiers, arc welding machines, etc. Harmonic filters reduces harmonic distortion to avoid higher current across the capacitor terminals resulting in over heating the capacitor.
   
9. Switch ‘off’ capacitors when inductive loads are not in use. Care must be taken to see that the capacitors shall not draw any current from the source which results in leading power factor which is not recommended since the reactive power compensation exceeds more than what is needed.
   
10. When star delta starters for higher rating inductive motors are switched on, take care so that capacitors are switched on when motors are running in delta connection only. This can be done by making use of delay timer which can switch on the contactor and capacitor.

INSTRUCTIONS FOR INSTALLATION & MAINTENANCE OF L.T POWER CAPACITORS:

• Ensure proper rating of required KVAr is connected at load points.
  
• Adequate fuse ratings / cables switch gears shall be used.
  
• Firm fixing of capacitors along with cable lugs of appropriate size shall be used.
  
• Earthing should be done properly to avoid accidental leakage current.
  
• Repeated switching without sufficient time delay shall be avoided.
  
• Discharge resistors needs periodic checking in order to avoid shock hazards.
  
• Periodic checking of current in each phase is essential to keep track of capacitor condition.
  
• Switch off power capacitors under light load or no load conditions.
  
• All capacitors must be discharged before handling.

MULTIPLYING FACTOR FOR CALCULATING THE SIZES OF CAPACITOR FOR POWER FACTOR IMPROVEMENT:

RECOMMENDED CAPACITOR RATING FOR DIRECT CONNECTION TO INDUCTION MOTORS:

" We request you to please fill the below Questionnaire Form in order to assist you in selecting the required ratings of Power Capacitor along with design choice of 'Standard' or 'Heavy Duty' ".