AC Power Sources
The linear supply offers low noise, low distortion and fast transient response but it is less efficient due to its larger size as well as being much heavier.
Power Factor is the ratio of the actual power of the alternating current as measured by a wattmeter to the apparent power as indicated by an ammeter and voltmeter. It can also be defined as the cosine of the phase angle between the voltage applied to the load and the current passing through it. Inductive and Capacitive loads will cause a phase shift in the current. A perfect power factor is 1:1.
True Power is the amount of work performed by an energy source over time. In AC circuits it takes into account non-sinusoidal wave shapes and leading and lagging current which are caused by reactive loads.
The VA rating of the power supply pertains to the sizing of the power supply. The VA rating of the power source is the true RMS current multiplied by the true RMS voltage. It is also considered Apparent Power.
Agency Compliance Information
Safety standards do usually vary by country, especially between Europe and the United States. However, while many safety agencies are specifically founded and/or affiliated with certain countries, most are accepted by a variety of nations. For example, even though UL is the most popular electrical safety agency responsible for consumer products sold in the United States, many other countries have deemed UL listed products acceptable to sell within their own borders. Likewise, the United States accepts many products that are TÜV listed to be sold within our borders. Check with your local safety agency office for more information
Safety agencies are regulatory bodies that establish testing procedures called standards. They provide their seal of approval, known as an agency listing, to a product that meets their standards. In the United States, one of the most popular agencies is Underwriters Laboratories (UL), in Germany, TÜV Rheinland, in China, China Compulsory Certification (CCC).
A standard is a set of test procedures that applies to a specific electrical product or category of products. Standards are used to verify that products meet basic requirements for safety, construction and durability.
CE is the abbreviation of “European Communities” and symbolises to custom officials that the product marked complies with one or more relevant EC-Direction. The CE Marking applies to products regulated by certain European health, safety and environmental protection legislation.
This varies by product type and classification. You can call us here at +60-3-78429168 or your local safety agency office for information on the standards that apply to your product.
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