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Vasai East Vasai Thane 401208
Mon-Fri 08:00 AM - 05:00 PM
Vasai East Vasai Thane 401208
Mon-Fri 08:00 AM - 05:00 PM

HT APFC Panel

INTRODUCTION:

Cospower Engineering Limited are in manufacturing ofHT Automatic Power Factor Correction Panels.Along with supply of this product we also undertake the services of installation, commissioning, and maintenance of this product. The decision of use of HT APFC panels must be taken carefully as frequent switching of HT capacitors is not desirable. While the basic function of HT capacitors is to improve PF the task becomes tricky the loads vary frequently. As an expert in the field of capacitors, we take a judicious decision of by studying the load pattern and for periodically changing of loads we recommend HT APFC with optimum no of steps and with a switching pattern that will not cause any harm the capacitors. For the dynamic changes in load pattern, we suggest either LT APFC/RTPC panels and CosVar Manager Panel (Static Var Compensator). HT APFC panels have today become an integral part of PF improvement system in modern industries and power utilities. The designs and performance of HT APFC have been well established and proved.

RATINGS AND CONSTRUCTION :

HT APFC panels are available upto 11 kV voltage levels. For cubicle mounted indoor/outdoor HT APFC panels Power Contactors are used for switching of capacitors. In case of outdoor open type installation in place of Power Contactor, Automatic Capacitor Switch is used as Power Contactor cannot be installed in outdoor open-air installations. The no of steps is restricted to minimum and generally its upto 4 steps. More of steps can be considered after proper study. At typical Bill of Materials and SLD for HT APFC panel is as under ;

HT APFC PANEL

LIMITS OF HARMONIC LEVELS :

Sl. No. Description Qty
I INCOMING COMPRISING THE FOLLOWING:-
1 200 A, 11 kV, Indoor, single break with earth switch enclosed type Isolator. 1
Instrument Transformers :-
2 200/1-1 A, 11 KV, Indoor epoxy dry type Current Transformer. 3
3 11 kV/110 V, Indoor epoxy moulded resin cast dry type Potential Transformer. 1
4 9.0 kV, 10 kA, Metal Oxide type Lightning Arresters. 3
5 Control Cubicle comprising of relays, meters and accessories. 1
II OUTGOING STEPS COMPRISING THE FOLLOWING:-
II OUTGOING STEPS COMPRISING THE FOLLOWING:-
A 1 No., 360 KVAr, 12.1 kV, Capacitor step comprising the following equipment:-
1 200 A, 11 kV, Vacuum Contactor. 1
2 Control cubicle having protection, metering and accessories 1
3 40 Amps, 11 kV, HRC type Fuses 3
4 120 kVAr, 6.99 kV, 1 phase capacitor unit. 3
5 0.24 kVAr, 11 kV, 1 phase, for indoor enclosed panel, Air Cored Dry Type Series Reactor. 3
6 11 kV/110 V/190 V, 3 Phase, Indoor Dry Type type Residual Voltage Transformer (RVT). 1
7 MS sheet steel enclosures fabricated out of 2 mm thick CRCA sheets with base channel with IP-4X degree of protection. The panel shall have provision for terminating HT power cable. Name plates and danger plates will be provided at appropriate locations 1
B 2 Nos, 720 kVAr, 12.1 kV, Capacitor step comprising the following equipment:-
1 200 A, 11 kV, Vacuum Contactor 2
2 Control cubicle having protection, metering and accessories. 2
3 80 Amps, 11 kV, HRC type Fuses 6
4 120 kVAr, 6.99 kV, 1 phase capacitor unit 12
5 0.48 KVAr, 11 kV, 1 phase, for indoor enclosed panel, Air CoredDryType Series Reactor. 6
6 11 kV/110 V/190 V, 3 Phase, Indoor Dry Type type Residual Voltage Transformer (RVT). 2
7 MS sheet steel enclosures fabricated out of 2 mm thick CRCA sheets with base channel with IP-4X degree of protection. The panel shall have provision for terminating HT power cable. Name plates and danger plates will be provided at appropriate locations 2

PURPOSE :

Many Power Utilities have adopted power tariff that penalizes both for lead and lag Power Factor. Hence while fixed capacitors can be applied for constant and steady loads, for fluctuating loads switched capacitor are necessary and hence the option of providing HT APFC panels is considered. Also, in the substation of power utility the variation in reactive power is prevalent as the usage of power varies throughout the day. Fixed capacitor in power distribution centres can cause too much overcompensation of reactive power which can have adverse effect in quality of power, losses etc. In such case to HT APFC panels are recommended.

FEATURES :

1) Maintain Power Factor close to unity under any load conditions.
2) The reactors provided with capacitors limits in rush current.
3) Improves system voltage.
4) Reduces power losses as PF is maintained close to unity.
5) Maximum Demand of the consumer is reduced.
6) As load current reduces the life of electrical equipment and cables gets enhanced.
7) It is an economical option.