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  • Theoretical introduction to Switch mode converters

    Theoretical introduction to Switch mode converters

    Jul , 18 2022
    Switch mode power conversion technology dominates nearly every segment of the economy, including demanding aerospace and military power systems that impose requirements more demanding than those imposed by power utilities or industry. Switch mode converters are, for example, successfully hardened against the effects of frequent lightning strikes on aircraft, against the effects of nuclear electrom...
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  • Effect of input capacitors between UPS and Generator

    Effect of input capacitors between UPS and Generator

    Jul , 18 2022
    Input capacitors used for filtering purpose cause pure apparent power to flow between the supply and the UPS. Such power is referred to as leading or capacitive power. Gensets can manage limited amount of pure leading power, as it interferes with the excitation circuit in the AC generator, leading to voltage oscillations and genset’s shutdown. Safe operating area charts show the allowed gensets’ l...
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  • How to have UPS and generators getting along?

    How to have UPS and generators getting along?

    Jul , 18 2022
    As a rule of thumb, a genset continuous power rating should not be less than 1.5 times the UPS nominal power. The oversizing factor accounts for UPS efficiency, typically 96%, UPS power factor, typically 0.99, input harmonic distortion, typically 3% and adds up a power safety margin to prevent load steps from triggering a non-stable response in the genset’s output voltage. As mentioned above, thou...
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  • Relation between UPS and Generators

    Relation between UPS and Generators

    Jul , 18 2022
    UPS and generators should be best friends, smoothly cooperating to improve site’s resiliency. Often this might not be the case, due to mutual misunderstandings and lack of information. This article is a comprehensive guide and essential knowledge base about UPS input performance and its impact on generators’ operation. The UPS point of view： In real operation, whenever a mains failure occurs, the ...
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  • Efficiency of DC power system

    Efficiency of DC power system

    Jun , 27 2022
    In this article we will explain the efficiency of DC systems and progress to AC systems on the next article. In very basic terms, efficiency is the measure of how much power is not being wasted by a system. More waste is less efficient. In electrical systems, we measure the power entering a system in watts; the unit of measure for work performed. Efficiency is the ratio of (Power-In) -vs. - (Power...
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  • How to choose UPS power supply for the computer room? (Part-2)

    How to choose UPS power supply for the computer room? (Part-2)

    Jun , 27 2022
    Enterprise data centers are becoming more and more important nowadays. How to ensure the stable operation of enterprise data centers has become a very critical factor. UPS is a standard accessory for many enterprises in data centers, so how to choose a UPS power supply suitable for enterprise applications? In our last article we discussed about some options, now we are going to discuss in details....
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  • How to choose UPS power supply for the computer room? (Part-1)

    How to choose UPS power supply for the computer room? (Part-1)

    Jun , 27 2022
    Enterprise data centers are becoming more and more important nowadays. How to ensure the stable operation of enterprise data centers has become a very critical factor. UPS is a standard accessory for many enterprises in data centers, so how to choose a UPS power supply suitable for enterprise applications? UPS classification: In general, UPS systems are divided into three categories, backup (or of...
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  • What types of monitoring and recording devices are suited for high rate charging?

    What types of monitoring and recording devices are suited for high rate charging?

    Jun , 20 2022
    The higher the charging rate, the more critical it is to monitor the charging process to prevent permanent capacity loss. In efforts to preserve battery life, Fast and Opportunity charging incorporates a method of monitoring battery electrolyte temperature and/or internal resistance and adjusting charging current as necessary. Although these monitoring devices can have a very positive impact on ba...
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  • What are some key practices for a Fast or Opportunity charge operation?

    What are some key practices for a Fast or Opportunity charge operation?

    Jun , 20 2022
    What are the operational implications of charging at a higher rate? Initial Cost: Initial charger investments may cost up to 5 times more than a conventional charger operation, especially if the charging system utilizes a dedicated charger for every battery. Infrastructure Change: Once committed to the Fast or Opportunity charge process, it can be very difficult to transition back to Conventional ...
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