Automatic power factor correction with capacitor banks

Medium voltage automatic power factor correction/reactive power compensation systems using capacitor banks are used everywhere that motors are still directly operated without power electronics, or other consumers with a low inductive cosφ place strain on the grid with reactive power in addition to their active-power requirements. Local supply of this reactive power by means of compensation systems relieves the burden on the supply grid and reduces losses.



Overview of MV APFC capacitor banks

Automatic power factor correction with capacitor banks aims to improve power factor and enhance power quality, utilising capacitors to offset usually inductive loads(motors).APFC system  increase the efficiency of power supply, delivering immediate cost savings on electricity.

ZD-GWJ Series medium voltage automatic capacitor banks can detect the reactive power needed by the system in real time,compare it with the set value, carry on the automatic intelligent capacitor-switching on/off, make the reactive power of the system achieve dynamic balance, in order to improve the power factor of the system, stabilize the system voltage. 


MV/HV automatic capacitor banks

Power capacitors and reactors


Technical specifications of MV Capacitor banks

Name

Medium voltage Automatic power factor correction with capacitor banks

Model                                          

ZD-GWJ-H/6-                                                                          

Rated Voltage 6Kv~35Kv      
Connection Type     Three phase There wire, Three phase four wire
Rated Frequency
50/60HZ
Step Capacity 100,200,300kVAr
Rated Capacity/panel
1200kVAr
Power Factor 
>0.9
Switch
Vacuum Contactors
Capacitance Tolerance
-5%, +10%
Reactance ratio
6% 12% or customerized
Switching
Automatic switching Capacitors
Storage temperature
-40~85 °C
Working temperature
-25~55 °C
Humidity
≤95%,non-condensate
Dimension (mm)
800(1200)*800(1200)*2200(2400)
Installation
Indoor, free standing
Altitude 
 <1500m without de-rating
Certification
ISO9001,CCC, Type Test Report


Benefits of MV APFC with Capacitor banks


  1. Save money on electricity costs

           The Electricity Authorities, force companies distributing electricity to apply financial penalties to utilities that have a substantial contractual power and low energy cosφ (generally 0,9). ZDDQ capacitor banks allow you to avoid penalties, which often are not reflected in the bill, and then are paid by the final user without even realizing it.Meanwhile,capacitor banks is widely convenient, both in the case of central and individual compensation, with Pay-Back less than or equal to 1 year.

  2. Reduce investment costs
    ZDDQ APFC Capacitor banks makes it possible to start out with a smaller system and, if necessary, expand the system by adding further modules later on.
  3. Improve Power Quality
    In many industrial electric plants supplied by MT there is a tension considerably distorted, due often to excessive load of MV/LV transformer. ZDDQ APFC Capacitor banks with a consequent load reduction by the transformer allow to bring it back to the operating conditions within the linearity limits, substantially reducing the voltage distortion. Furthermore the proper Power Factor reduces the presence of harmonic currents, and reduce heat, resulting in greater longevity and lower maintenance costs.
  4. Maximizing equipment utilization
    ZDDQ APFC Capacitor banks reduces the burden on transformers by providing the required reactive power locally, so that more consumers can be supplied by the same transformer.


Application fields of APFC with capacitor banks

ZDDQ APFC panel with capacitor banks are widely used for fluctuating loads such as motors, variable frequency drives, melting furnace from Steel Rolling mills,Chemical industry,Cement plant, Suger plant, Textile, Hospitals, Hotels, Building segment,Automobile industry,Oil and gas industry,public grid etc.










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