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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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Mar 23,2020
Overview of Active Power Filter APF-1000 APF-1000 Active power filter has various compensation modes (harmonic, reactive power, three-phase unbalance and capacitor switching control), which can simultaneously make the said various compensation, and the proportion of compensation capacity by harmonic, reactive power, and three-phase unbalance can also be set, comprehensively solving the problem of ...
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Apr 03,2020
Power factor correction Connected equipment (transformers, motors, air-conditioning, refrigerators, etc.) cause a phase angle between current and voltage.When the current is phase-shifted, it takes more current to deliver the same amount of active power. Impact of reactive power • Transmission equipment has to be sized for the apparent power, yet only active power is useful • Increased losses in t...
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Apr 13,2020
Voltage Sag Voltage sag is the main problem to cause the losses of industrial production. Unpredictable outage rarely happen in many high automated process control industries. who have the good power supplies. Voltage Sag is mostly caused by thunder,but it also has other reasons. Power system cause: starting of heavy machine and short circuit fault. Unpredictable accident:traffic accident,construc...
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Apr 18,2020
Power quality problems and Industry background Dynamic reactive power, lower power factors, and higher harmonic content are common power quality problems in the CNC industry. Major contamination sources of power quality include the punching machines,welding machines. When harmonics occur, dynamic reactive current and 3-phase imbalance are produced. During the CNC period, the power factor of arc fu...
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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 08,2020
How to calculate Harmonic Filter In power supply systems based on alternating current (AC) -- such as the main power distribution network from electric utilities -- non-linear loads can feed some amount of power back into the wiring. This feedback typically occurs in the form of harmonics: multiples of the frequency of the original AC wave. Harmonics need to be eliminated from a power circuit by a...
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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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Sep 08,2020
Leading Provider of Technology One of the Leading Static Var Generator manufacturing base in China Exclusive to +/-100Mvar Statcom R&D manufacture Advanced and strong R&D center Patents Owner Based on IGBT National Industry standards drafters CE Certificate 101 national patens 1 national science and technology invention award Advanced Technologies Perfect Auto-diagnosis at Starting Stage D...
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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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Sep 24,2020
480V power quality solutions has the best compatibility for low voltage grid(3 phase 4 wire).ZDDQ has full series 480V devices for power quality improvement and power factor correction. 480V Active Power Filter Active Power Filter has various compensation modes (harmonic, reactive power, three-phase unbalance and capacitor switching control), which can simultaneously make the said various compensa...
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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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Dec 18,2020
Introduction From ZDDQ professional engineers: Power systems are designed to operate at frequencies of 50 or 60Hz. However, certain types of loads produce currents and voltages with frequencies that are integer multiples of the 50 or 60 Hz fundamental frequency. These higher frequencies are a form of electrical pollution known as power system harmonics. Solution ZD-APF(Active Power Filter). This i...
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Jan 05,2021
Power factor correction capacitor banks and harmonic filters. Power factor correction capacitors and harmonic filters are an essential part of modern electric power systems. Power factor correction capacitors are the simplest and most economical means of increasing the capacity of any power system, minimizing energy losses and correcting load power factor. In addition, power factor penalties can b...
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Jan 21,2021
ZDDQ Engineers give an example for reference, An Alternator is supplying a load of 650 kW at Power factor 0.65. What size of Capacitor banks (kVAR) is required to raise the Power Factor to unity (1 or >0.95)? And how many more kW can the alternator supply for the same kVA loading when P.F improved. Supplying kW = 650 kW Original P.F = Cosθ1 = 0.65 Final P.F = Cosθ2 = 1 θ1 = Cos-1 = (0.65) = 49°...
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Jan 27,2021
Overview ZDDQ Active Power Filter have exported to many countries all over the world. These filters are widely used in a number of industries such as oil & gas, manufacturing, water/wastewater, metal and mining, and paper and pulp. A harmonic filter is used to mitigate harmonics created by non-linear loads in electrical equipment. Classification Ⅰ. Product Insights Based on product type, ...
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