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Nov 22,2019
Based on the power of a receiver in kW, this table can be used to calculate the power of the capacitors to change from an initial power factor to a required power factor. It also gives the equivalence between cosΦ tanΦ，
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Nov 22,2019
In an L.V/M.V/H.V electrical installation, capacitor banks (or Static var generator/Active harmonic filter)can be installed at 3 different levels. 1.Global installation Advantages: - No reactive energy bill. - Represents the most economical solution since all the power is concentrated at one point and the expansion coefficient makes it possible to optimize banks - Relieves the transformer. Remark:...
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Nov 23,2019
Rated insulation level The combination of voltage values that characterizes the insulation of the equipment with regard to its capability to withstand dielectric stresses. These values are selected based on the rated voltage of the bank/system. Standard insulation values are given for altitudes <1000 m above sea level. For higher altitudes, a correction factor must be used. Lightning impulse te...
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Nov 23,2019
Capacitor element Device consisting essentially of two electrodes separated by a dielectric (IEV 436-01-03). Capacitor unit Assembly of one or more capacitor elements in the same container with external terminals (IEV 436-01-04). Capacitor bank Multiple capacitor units connected so as to act together (IEV 436-01-06). Capacitor The word “capacitor” is used when it is not necessary to put particular...
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Nov 23,2019
Fundamental (component) The component of order 1 of the Fourier series of a periodic quantity. (IEV 161-02-17) Harmonic The component of the Fourier-series decomposition of a volt- age or current periodic wave. (IEV 161-02-18 modified) Harmonic order (h) The ratio of the frequency of a harmonic (fh) to the fundamen- tal (rated) network frequency (f1). (IEV 161-02-19 modified) Odd harmonics Harmoni...
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Nov 28,2019
Standard Features Enclosure ZDDQ Capacitor banks,free standing, compartmentalized, all welded, galvanneal steel construction with 3 point pad-lockable latching handles and stainless steel hinges. The enclosure is painted with a corrosion resistant ANSI gray-61 epoxy paint. NEMA 3R construction is standard; NEMA 12 and 4X are available as an option. Base of enclosure as well as capacitor supports a...
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Dec 05,2019
What's the Definition of Power Factor? Power Factor Definition: Power factor(PF for short) is the ratio between KW and KVA drawn by an electrical load where the KW is the actual load power and the KVA is the apparent load power. It is a measure of how effectively the current is being converted into useful work output and more particularly is a good indicator of the effect of the load current on th...
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Dec 18,2019
Single busbar compensation Overview An installation with a single LV busbar is that most often encountered. This type of installation requires that the reactive power can change with respect to the methods defined previously. Compensation uses all the receiving devices of the installation and the amperage of the current transformer is determined according to the total current conducted through the...
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Feb 07,2020
Power Factor Correction The active power produced by the active current can alone be turned into an effective use for the consumer; while the reactive power produced by the reactive current does not yield usable power, and consequently, is not registered on the active performance meter. The reactive power has, however, a negative effect on generators, transformers, and conductor lines, while causi...
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Mar 11,2020
Product Description ZDDQ Medium Voltage Metal Enclosed Capacitor and Harmonic Filter Banks are designed for industrial, commercial, and utility power systems requiring medium voltage automatic power factor correction. Standard designs are available for placement in outdoor or indoor substations (an enclosure integrity option can be added to allow for placement in publicly accessible areas) for pow...
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Mar 17,2020
China's economy According to China Daily China's economy is gradually returning back to normal, as major industrial companies outside of Hubei province have resumed work at a rate of more than 90 percent, China's top economic regulator said on Tuesday. The nonferrous metal industry's electricity consumption has reached normal level last year, and power consumption in the medical, chemical and elec...
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Apr 24,2020
Following are simple contrast list, Product Static Var Generator(SVG) Multifunctional electricity controller & optimizer （MEC） Mechanical switch capacitor （MSC） Thyristor-switched capacitor （TSC） Response speed ≤5ms ≤5ms 300ms 20ms Reactive power compensation ability Rated capacitive reactive power to rated inductive reactive power, 0.1kVar precision, and up to 1 power factor Rated capacitive ...
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Jun 29,2020
The nature of transformer inductive reactances All previous references have been to shunt connected devices such as those used in normal loads, and power factor correction capacitor banks etc. The reason for this is that shunt connected equipment requires (by far) the largest quantities of reactive energy in power systems; however, series-connected reactances, such as the inductive reactances of p...
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Jul 17,2020
Problem High Electricity Bills in Steel Factory. Analysis To analyze the power quality at Steels Factory and to understand the Voltage, Current, Power Factor, Active power,Reactive power, Apparent power, THD profile and to suggest the required solution to improve Power Factor, to qualify for Utility PF incentive. Towards fulfilling the need, fixed Capacitor bank of 2400KVAr has been installed at 1...
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Jul 27,2020
Overview ZD-MCJB Medium voltage automatic power factor controller and protection Unit Our R&D has developed MV automatic power factor controller and protection unit since May 2019, and has intalled in many sites an d has a very good running. Now we introduce our MV auto PF controller and protection unit officially. ZD-MCJB PF controller and protection unit is suitable for automatically adjusti...
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Aug 03,2020
Low Power Factor Operation of Induction Motor Induction Motors finds various applications in industries and household equipments. Such machine requires magnetic fields for its functioning hence, it draws magnetizing current from the source. The magnetizing current is the current that establishes the flux in the air gap of an Induction motor and this is independent of the load on the motor. It is t...
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Sep 15,2020
Leaders in Power Quality Solutions ZDDQ is one of leading manufacturers of power quality solutions from China. Here at ZDDQ we believe in creating and maintaining the highest quality power possible for our customers through an indepth understanding of power usage and electrical efficiencies. We source world’s best components to manufacture custom solutions to reduce maintenance and energy costs. N...
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Oct 04,2020
During 1st quarter in 2020, for the reason of Covid-19, Medium Voltage STATCOM projects are delayed or stopped in China. But from March, the conditions has been better and the projects status has been normal from the 2nd quarter. From the 2nd quarter to now,we have finished installatlion and commissioning of some Medium voltage Stacom projects, such as 10kv/4Mvar, 10kv/2Mvar, 35kv/12Mvar, 10k...
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