CATALOGUE POWER FACTOR CORRECTION INTERNATIONAL VERSION
80Pages

POWER FACTOR CORRECTION INTERNATIONAL VERSION

18-53 Low voltage range 54-68 Medium voltage range Power factor correction Determining the reactive energy compensation solution Selection guide Solutions for all applications Smart capacitor banks Energy quality audit, commissioning and maintaining capacitor banks Subtable of contents Alpivar 3 and Alpibloc capacitors Alpimatic and Alpistatic automatic capacitor banks Catalogue pages Subtable of contents Medium voltage capacitors Medium voltage capacitor banks General characteristics of MV components Faults and protection types of MV capacitor banks External protection devices used with MV...

POWER FACTOR CORRECTION An AC electrical installation incorporating receivers such as transformers, motors, fluorescent tube ballasts or any other receivers whose current is phase-shifted in relation to the voltage, consumes reactive energy. This reactive energy (expressed in kilovar-hours – kVArh) is billed in the same way as active energy by energy suppliers. Reactive energy therefore results in more power being used and thus contributes to higher electricity bills. POWER FACTOR By definition, the power factor of an electrical installation (PF) is equal to the active power P (kW) over the...

OPERATING PRINCIPLE Power diagram Capacitor banks can improve the power factor of an electrical installation by giving it a proportion of the reactive energy it consumes. The capacitor is a receiver made up of two conductive parts (electrodes) separated by an insulator. When this receiver is subjected to a sinusoidal voltage, it shifts its current, and hence its power (capacitive reactive), by 90° ahead of the voltage. Conversely, all other receivers (motors, transformers, etc) shift their reactive component (current or inductive reactive power) by 90° behind the voltage. P: Active power S1...

DETERMINING THE LV POWER FACTOR CORRECTION SOLUTION In a low voltage electrical installation, determining the reactive energy compensation solution requires several stages such as : Determining the capacitor power (kVAr) to compensate for the reactive energy required for the installation Determining the general configuration Global compensation for the whole installation Compensation by sector Individual compensation in high power loads Determining the compensation mode Fixed compensation for stable load Automatic compensation for variable or unstable load Dynamic compensation for very...

Initial power factor cos ø1 Capacitor power to be installed, in kVAr per kW of load, to read the power factor at cos ø2: cos ø2: The table opposite can be used to calculate the capacitor power in order to switch from an initial power factor to a desired power factor based on the receiver power in kW. It also gives the equivalence between cos ø and tg ø. For example: 200 kW motor - cos ø 1= 0.75 - desired cos ø 2 = 0.93 - Qc = 200 x 0.487 = 98 kVAr GENERAL INFORMATION WWW.ALPESTECHNOLOGIES.COM

DETERMINING THE LV POWER FACTOR CORRECTION SOLUTION (continued) STEP 2 STEP 3 Electricity supply Depending on the installation architecture, the location and power of the receivers consuming reactive energy, the following are possible: ADVANTAGES COMMENTS GC = Global compensation CS = Compensation by sector IC = Individual compensation M = Typical motor load Increased power available at the transformer secondary Reduction of losses along the line between transformer and mains secondary distribution boards Inexpensive solution No savings in terms of sizing electrical equipment VARIABLE LOAD...

STEP 4 DETERMINING THE CAPACITOR BANK TYPE ACCORDING TO THE LEVEL OF HARMONICS For supplies with a high level of harmonic pollution, Alpes Technologies recommends capacitor banks with SAH, reinforced SAH and extra-reinforced SAH type detuned reactors. Measurements THDU % Type of capacitor to be used The detuned reactor performs a threefold role: • Increasing the impedance of the capacitor in relation to the harmonic currents. • Shifting the parallel resonance frequency (Fr.p) of the source and the capacitor to below the main frequencies of the harmonic currents that are causing...

Selection guide determining the reactive energy compensation solution CAPACITOR BANK POWER/TRANSFORMER POWER RATIO (QC/ST) RAPIDLY CHANGING

ALPES TECHNOLOGIES RANGES HARMONIC POLLUTION LEVEL MEASUREMENTS THDU % WITH CIRCUIT BREAKER ALPIBLOC p. 25 WITH/WITHOUT CIRCUIT BREAKER ALPISTATIC(1) p. 33-34 TYPE OF CAPACITOR TO BE USED H type 189 Hz reactor ≤6 WITH/WITHOUT CIRCUIT BREAKER ALPIMATIC p. 27-29 Active filter (1) The Alpistatic range is only available in a version with detuned reactor. (2) SAH, reinforced SAH and extrareinforced SAH type capacitor banks are enclosures with a detuned reactor. Check compatibility with your local operator's centralised remote control frequency, for other tuning frequencies please consult us. (3)...

Alpes Technologies offers reactive energy compensation solutions that are perfectly suited to different types of application(1). HOSPITAL DATA CENTRE AUTOMOTIVE INDUSTRY (1) These equivalences are given for information purposes only. Reactive energy compensation solutions must be chosen according to the actual characteristics of the installation site.

Reinforced SAH and extra-reinforced SAH types SAH, reinforced SAH and extra-reinforced SAH types GENERAL INFORMATION WWW.ALPESTECHNOLOGIES.COM

Smart capacitor banks Supervision of capacitor banks: an efficient solution for managing your installation. Alpes Technologies now offers its customers smart capacitor banks which, in addition to the measurement function, are able to transfer information and control installations remotely. The offer consists of 2 efficient solutions that can optimise installation safety. SOLUTION 1 For a new capacitor bank installation, optional “smart capacitor bank” kits, factory-wired and assembled (order at the same time as the capacitor bank). Solution 1, with optional factory-wired and assembled kits...