Microbuzzer.com » Rated Current http://www.microbuzzer.com Buzzer, SMT/SMD buzzer, Magnetic buzzer, Piezo Buzzer, Sound Transducers Sun, 19 Sep 2010 14:04:53 +0000 http://wordpress.org/?v=2.9.1 en hourly 1 Rated Current http://www.microbuzzer.com/rated-current.shtml http://www.microbuzzer.com/rated-current.shtml#comments Mon, 29 Dec 2008 09:16:53 +0000 microbuzzer http://www.microbuzzer.com/?p=741 Electrical equipment rated current is defined as the baseline ambient temperature in the working conditions of rated voltage, the heat does not exceed the long-term temperature by allowing heat to allow the greatest long-term through the current. Ambient temperature for long-term allows the maximum current has a great impact , as the equipment installation location of the ambient temperature and benchmarks are not necessarily the same as the ambient temperature is generally a requirement: When the electrical equipment working in the environmental temperature is higher than +40 ° C (but not more than +60 degrees Celsius), the ambient temperature increased by 1 degree , recommended reducing the rated current 1.8 percent; when the work of the ambient temperature is lower than 40 degrees when the ambient temperature reduced by 1 each, the proposal to increase the rated current 0.5 percent, but shall not exceed the maximum rated current of 20%.

Such as: 1mm2 section of the copper wire, rated current carrying capacity of about 11A, (30 degrees).

Heading: Re: 1mm2 copper 2 1.5P can install air-conditioning

BV-1mm2 lines used in the ambient temperature around 35 degrees when the carrying capacity of 11A, 1.5P air-conditioning by 1.25KW calculated current of 1.25 / (0.22X0.9) = 6.3A, the calculation can be used, but because of design requirements for the smallest cable cross-section not less than 2.5mm2, so we have adopted the design of the smallest line BV-3X2.5 and regulatory requirements are now at least socket loop of copper wire used 2.5mm.

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