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Solutions for Power factor Correction at Medium Voltage

Solutions for Power factor Correction at Medium Voltage
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Solutions for Power factor Correction at Medium Voltage

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CIRCUTOR, SA Headquarters in Viladecavalls.

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Leaders by experience CIRCUTOR has over 40 years experience and 6 production centres in Spain and the Czech Republic working on the design and manufacture of units for improving energy efficiency: Units for measurement and control of electrical energy and supply quality, industrial electrical protection, reactive compensation and harmonic filtering. Providing solutions with over 3,000 products in over 100 countries worldwide. Renewable energies Two of 6 CIRCUTOR production centres. Quality & Metering Power Factor Correction and Harmonic Filtering Smart Charging of Electric Vehicles Medium...

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Technical information Why does the power factor need to be corrected? Reactive power compensation is essential for the correct technical and economical management of an MV electric system. Its benefits are: Technical optimisation — Helping to control voltage throughout the transmission and distribution system — Discharging power lines and power transformers — Reducing level of system losses Economic optimisation — Reduced billable reactive energy costs (surcharges by country and tariff) — Reduced hidden economic cost from the Joule effect in transport lines — Enables a better use ratio...

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Technical information Individual Reactive compensation may be carried out at any point of an installation. A different strategy must be followed for each method and position to obtain power factor improvement. Individual compensation Direct compensation to the machine being compensated is the optimum technical solution for directly reducing reactive consumption in the load. This is commonly used for pumps, motors and transformers. Compensation for load groups in installations that have a sectored and extensive distribution. This serves as an ancillary support for a global centralised...

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Technical information Controlling the voltage level in the lines One of the critical points during electrical energy distribution is maintaining the voltages at the different points of the distribution lines. This applies to ring networks in the different distribution centres and radial networks at line terminals. There are two methods available for controlling voltage at the MV distribution line terminals, which depend on the configuration of the distribution lines: — Control at the line origin, generally for lines with a radial configuration. — Control at the network points in a ring or...

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Technical information Example of a reduction of Joule effect losses in an overhead distribution line system In this case, the evolution of the level of losses of the line and voltage drops is analysed in a distribution system rated at 20 kV with and without capacitor banks connected. The effect of the capacitor banks in an MV overhead distribution network in a rural area in which there are two distribution centres A and B, fed by lines A and B with resistances RlA = 0.344 mΩ/km y RlB = 0.444 mΩ/km. Status of loads with no capacitor banks connected At origin, the system's power status is as...

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Capacitors Full range of MV capacitors CIRCUTOR's range of MV capacitors comprises a complete series of single and three phase capacitors in full compliance with International Standard IEC 60871. The design and production of the capacitors is carried out with the guarantee and reliability of the finest raw materials and sufficient flexibility to provide a personalised solution for each application. R+D behind the reliability CIRCUTOR has a department made up of R+D experts who form a highly experienced team that cares for and ensures that the entire design and production process provides...

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Capacitors Full range of MV capacitors Capacitor protection with an internal fuse Modern high-voltage capacitors are subject to very high insulation requirements. A capacitor comprises several capacitor units or capacitor elements. Thus, the purpose of suitable internal protection for capacitors is to disconnect a defective unit before dangerous consequences occur, thus reducing any possible secondary effects of the fault. Example of a capacitor with an internal fuse Standard IEC 60871-4 is applicable to internal fuses that are designed to isolate faulty capacitor elements in order to...

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Capacitors Full range of MV capacitors Table of general technical features for CIRCUTOR Medium Voltage capacitors Nominal power Rated voltage Insulation level See table of insulation levels Maximum overvoltage See table of overvoltage levels, as per IEC Capacity tolerance Total losses Statistical mean lifetime >130,000 hours (normal conditions) Discharge resistors Current limits Ambient temperature category -40°C/”C” (optional class D) (table 3) Protection degree Maximum service altitude 1000 m above sea level (consult other conditions) Assembly position Vertical / Horizontal Assembly...

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Capacitors Full range of MV capacitors References for CHV-M Medium voltage single-phase capacitors Interior use with internal fuses and discharge resistance (*) No internal fuses. Other power ratings, please ask kvar Weight 11 Solutions for power factor correction at medium voltage @2013 CIRCUTOR, S.A. - circutor.com - reactiva@circutor.com

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Solutions for Power factor Correction at Medium Voltage - 12

Capacitors Full range of MV capacitors References for CHV-T Medium voltage three-phase capacitors Interior use with internal fuses and discharge resistance kvar Weight Dimensions CHV-M Dimensions CHV-T CHV-T 600/11 (*) No internal fuses Other power ratings, please consult 12 Solutions for power factor correction at medium voltage @2013 CIRCUTOR, S.A. - circutor.com - reactiva@circutor.com

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Capacitors Full range of MV capacitors Capacitor selection Example 1 Three-phase MV capacitor selection We need 300 kvar at 6 kV, and so we will choose a capacitor at 6.6 kV (Us+10%), for When selecting MV power capacitors it is important to know the conditions under which the capacitors are going to operate, basically: assigned voltage, insulation level, working temperature and special conditions. which we would need a capacitor of 363 kvar Assigned voltage It is best to ensure that the assigned or rated voltage of the capacitors is not lower than the maximum working voltage where they are...

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