A transformer’s rated temperature rise (degrees Celsius) is the average temperature of the transformer’s windings over an ambient temperature of 40°C. In other words, the average winding temperature = ambient temperature rise. See similar questions...

First of all, you might consider whether it might not be better to wait until getting to the UK to buy transformers. There's not much of a market in the US for converters, since there is only one electrical standard in the US and Canada. Europe seems to be a little more aware of the existence of different electrical standards in the world, and thus stores probably have better availability and wider selection. See similar questions...

Besides destruction, the lifetime of a transformer is determined by its highest temperature (so-called hot-spot temperature). For an oil-cooled transformer according to IEC 60354, lifetime is reduced by a factor 2 for every 6 degrees increase in hot-spot temperature. For dry transformers, according to IEC 60905, the increase is 10 degrees. In particular for transformers serving harmonic loads, the hot-spot location is difficult to determine. top See similar questions...

Acoustic foams, which are thermally insulating - may act to insulate components so that heat is not so easily transmitted to the case sides and top and bottom for dissipation to the outside. This may cause slight increases in temperature. The configuration of the materials around the case interior and components may also be such that airflow pathways become more tortuous. This is only likely where materials have been fitted incorrectly so that they obstruct airflow - which is NOT recommended. See similar questions...

Temperature-rise limits means that the MV-fuse link and MV-fuse base shall be able to carry their rated current continuously without exceeding the limits of temperature rise given in table 6 of IEC 60282-1. See similar questions...

Touch is a poor indicator of proper transformer operating temperature. Properly designed transformers can reach 50°C (122°F) above ambient temperature. In an ambient temperature of 20°C (60°F), the total temperature can reach 70°C (190°F), which is too hot to touch. Thermometers are the best way to determine the temperature. See similar questions...

A fire door that by code, meets a maximum unexposed surface temperature requirement at a specified time interval during the fire test. (i.e. 250 deg @ 30 minutes) See similar questions...

Answer: Temperature rise doors are used in stairwells. In the case of fire on one side of the door, the unexposed side of the door must remain below 450 degrees F for 30 minutes. This type of door is required on all fire rated stairwell doors (SBC 705.1.3.4). The reason for this requirement is to protect escaping occupants. A standard metal door exposed to fire can reach 1200 degrees F on the unexposed side, and this amount of heat could cause clothes on an exiting occupant to catch on fire. See similar questions...

The Kelvin (K) is the unit of color temperature. 4100K is the brightest, most natural white light similar to that of daytime sunlight, and therefore the HID color temperature used most in the OEM automotive industry. When you look at the light coming directly out of an HID headlight, it possesses a bit of a blue or purple hue which most people recognize as the expensive, elegant look characteristic of HID's. For this reason, some HID kit manufacturers produce 5400K, 6500K, 8000K, etc. See similar questions...

Yes. Transformers are tools which transform the raw XML produced by Dapper to various useful formats. Soon, we will release the code of the existing transformers and an API that will allow you to build new transformers and add them to the current existing list. See similar questions...

Transformers generate heat! They all do. There is no way of getting around it. Heat is a by-product of the transformation process and heat is due to losses in both the core and coils of the transformer. For most applications, the heat generated is of little concern. But it becomes a concern when determining how much cooling must be provided to compensate for the heat or when the temperature of the enclosure could become a problem. Transformer losses are dependent on loading. See similar questions...

Other conditions that need be considered when sizing a transformer to a motor load are ambient temperature (derate the transformer nameplate rating by 8% for ever 10?C above 40?C), altitude (derate nameplate rating by 3% for every 300 feet above 3300 feet), and motor loads that frequently start and stop. If a motor starts several times an hour (such as an air conditioner), the calculated transformer size required should be increased by 20% to offset the effects of inrush heating. See similar questions...

Answer: It is the industry's highest rating for this type of space heating equipment and allows us to deliver the maximum amount of heat with the minimum amount of outside air. The maximum 160°F temperature rise/discharge temperature rating is crucial because it translates into lower horsepower motors, less outside air and reduced energy costs. See similar questions...

Minimal. At > 1000 watts, < 20C temp rise. At 15-50 watts, < 15C temp rise. At < 15 watts, < 10C temp rise. There may need to be some shielding for the AM band requirements within a vehicle. Present production design at 38 watts meets FCC and CISPER 22, so lower power levels may provide additional opportunity to meet this requirement. There are many tools and much modeling to refine the design as needed. Participation will be negotiated with third parties to define and implement these changes. See similar questions...

The long-term service temperature is defined as being the maximum temperature at which plastics can be kept in hot air for 10,000 and 20,000 hours without losing more than 50% of the initial values for their typical properties. See similar questions...

The short-term service temperatures are the short-term peak temperature values that the plastic can withstand for a period of minutes or sometimes even hours without the plastic being damaged, taking into account the load and its duration. See similar questions...