LEADING TEST & MEASURMENT POWER SUPPLY PROVIDER
Preen is a leader in power supply system and has been developing products based on the core technology of power conversion. Preen (AC Power Corp.) has three major product line, AC Power Source, DC Power Supply, and UPS & Voltage Regulator for defense industry, renewable energy, simulators, line conditioners and UPS. We also developed products that serves to specific applications and market's needs.
Advantages of Preen Ac Source
Advanced Power Electronic Technology:
Preen has been developing products based on power electronic technology, and has one of the broadest product line in the industries.
Capability of High Power Source:
Preen has biggest market share and quantity on high power supply, with capability of delivering 2,000kVA power source per unit.
Preen has sales and service office across Asia. We are also expanding to our reach to the US to provide most timely service to customers.
High Performace Programable AC Power Source for Renewable Energy
Preen's AFV-P Series is a programmable AC power source with DC output and precision measurements. This compact power source comes in four power levels, 600VA, 1250VA, 2500VA and 5000VA, providing clean power with distortion less than 0.3% at 50/60Hz. The AFV-P series can deliver output voltage from 0 to 310VAC and frequency from 40 to 500Hz (Opt. 15 to 1000Hz). It is ideal for commercial, defense and aerospace test applications from design verification, quality assurance, ATE to mass production.
Automatic Voltage Regulators and AC power source for Research & Compliance Institute
Different research & compliance Institutes may have different power requirements, such as power conversion or power conditioning. As the demands of automatic test steadily grow, requirements for power supply with programmable function are increasing rapidly as well.
For facility power in laboratory application, the surge protection and how to improve the power quality and harmonic distortion are foremost important, especially for electromagnetic compatibility (EMC) testing chambers. Preen’s APS series of solid state automatic voltage regulators and AFC series AC power source can help improving power condition from fluctuation. The AFC Series AC power source has a very low output conductive noise, and it rebuilds the waveform after double conversion to provide pure sine waveform AC source.
For life cycle test, burn-in test, or R & D verification, users will need a power supply with fast response programmable function to run a more sophisticated test sequence. The AFV and PWF series equips with standard RS485 and RS232 communication interfaces and optional GPIB interface. Users can use the built-in programmable function to edit test sequence of voltage and frequency. PWF series has a wide output frequency range of 45-500Hz and 300 -800Hz, suitable for aviation, aerospace, defense and military type applications.
AC power sources for Home Appliance
AC power sources or frequency converters are widely used in home appliance industry to provide quality power source and simulate different voltage and frequency for export or compliance test purposes. They have become an indispensable instrument in R&D and production phases.
Before being exported, home appliances need to be tested under voltage and frequency that are different from the grid. Preen’s AC power sources provide a pure sine wave power with great voltage regulation, high frequency stability and low harmonic distortion. Users can convert utility power to a power with desired voltage and frequency, and runs verification process in a variable voltage and frequency to ensure home appliance’s performance and reliability in abnormal power environment. Preen’s AC power sources also have reverse energy protection to handle inductive type loads.
In laboratory use and performance test, remote control and programmable function are critical. The AFV Series power sources have built- in programming sequence function allowing easy test setting. Users can also do the programming according to test plan and shorten the testing time.
Preen also provides voltage regulators products to protect equipments from fluctuation of the grid and improve power quality. It will prevent equipment from grid abnormality to ensure precision and accuracy.
AC and DC power supply for Aerospace & Defense
For the aerospace and military type applications, 400Hz AC and 28VDC are common specifications, but due to the ever-changing technology, 800Hz AC and 270V DC are now the new standards for aerospace markets. Different from commercial applications, power supply for military and aerospace not only need to provide quality power, but also have to follow MIL-STD-704F standard and handle harsh working environment.
The ground power units supply aircrafts power converted from the utility power to 400HZ or 800Hz for inspection and maintenance purposes. The traditional motor generator type ground power has down side on size, noise issue, fuel consumption and stability, which make many users gradually replace it with solid state frequency converter or ground power unit. Preen’s AMV / AMF series can provide a stable 400Hz or 800Hz power source with IP54 protection and 200% overload. There are outdoor and indoor models that have been applied in aircraft hangar, repair center, or military facility. For DC power applications, the ADS and ADG series can provide 28VDC or 270V DC power supply with robust design and high overload capability. It has been widely used for powering inductive type equipments.
An aircraft is made out of 3~5 million components. When it comes to performance and characteristic test, AC and DC power supplies are one of the most important devices. The applications require high accuracy and reliability from power supplies. Preen’s PWF series is a wide frequency range AC power source with programmable function to remote control and monitor the working status. The PWF series also has built-in programming sequence function, which allows users to program the unit easily. Applications include R&D lab, life cycle test, verification test and etc.
AC power source and solid state voltage regulator for Railway System
Automatic voltage regulators (AVR) and uninterruptable power supplies (UPS) that ensure operation of railway system are one of the foremost important equipment. They provide continuous power supply for control center and improve power quality from utility grid for mission critical applications.
Preen’s APS series is a solid state voltage regulator with high precision and fast response features. It converts utility gird power to a stable and regulated power, and prevent equipment from abnormal conditions such as surge from the grid. Therefore the loads will not be affected by grid’s fluctuation. The APH series is an inductive voltage regulator with easy maintenance. Due to its no-brush feature, APH can lower the ownership cost and down time for maintenance. The overload drive capability allows it to handle motor type loads with inrush current, and makes it ideal for railway related applications.
The ABU series is a true on-line UPS specially designed for industrial applications with overload capability and reverse energy protection feature. The unit ensures that railway system’s continuous operation even when the utility grid is down. ABU is optionally equipped with remote control function allowing centralized monitoring and control.
Preen’s line of AC power source is also an ideal product for railway system’s R&D and testing applications. With communication interfaces and programming functions, AC source can increase the efficiency and accuracy of test, such as voltage and frequency abnormality test. It also offers great advantages as facility power due to it robust circuit design and reliability.
Power supply, voltage regulators and UPS for Medical Equipment
In medical equipment research and development, manufacturing, or usage phase, power supply is one of the indispensable devices. Preen’s product line has a wide reach to different applications, such as power supplies for verification in research and development, voltage regulators and UPS for power conditioning , and facility power for power conversion and stable input to equipment.
Voltage regulators and UPS for Electronics Manufacturing
In the manufacturing sector of IT industry, the power quality of production line determines equipment’s precision and accuracy. Unstable voltage or frequency outage often results in higher failures on assembly process and further causes great losses to whole plant. With years of experience and endeavor, Preen’s voltage regulators and UPS have been widely used in major electronics manufacturers. They eliminate abnormality caused by the grid and offer good quality of power input, which can significantly improve power condition and yield rate in facility.
High performance shore power supply for Shipbuilding &Cold Ironing
Instead of using diesel-burning engines, many ports nowadays started to install shore power connections at berth to provide electricity to ships’ lights, pumps, communication and other devices. This greatly reduces pollution from vessels, lowers emissions of CO2, and eliminates noise from engines. The shore power converter utility power to 440V or 6600V, and needs to have outstanding level of protection bear the harsh outdoor environment.
The BPS series is a family of high performance Shore Power Supply developed to be used at shipbuilding, berths and ships. Installed in a customized container, it provides reliable output voltage of 440V or 6600V and output frequency of 50 or 60Hz with overload capability. With protection level up to IP54, the BPS series can operate under environment with high level of humidity, heat and corrosion.