RS Components 电工电料 PCB变压器 44200 使用说明.pdfVIP

S R O T C U D N I MY RRA S ...Of course ! R E M R O F S N A R T TECHNICAL INFORMATION RATED PRIMARY VOLTAGE (V) This is the supply voltage assigned to the t ransformer by the manufact urer. RATED SECONDARY VOLTAGE (V) This is the secondary out put voltage assigned to the t ransformer when supplied with the rated primary voltage, frequency range, rated secondary current, all assigned by the manufact urer for the specified operating conditions of the t ransformer. RATED POWER (VA) The specified power levels in this catalogue are the secondary power levels, in other words, those available when the t ransformer is loaded. It is the product of the RMS rated secondary voltage by the RMS rated current. If the t ransformer has more than one out put winding, the rated power denotes the maximum sum of the products of RMS rated secondary voltage by the RMS rated secondary current, respectively. This rated power is defined for rated ambient temperat ure conditions. example P = 3,2 VA ta 70/ B The t ransformer can deliver 3.2VA at maximum ambient (70°C), the load consisting of a resistor load defined by R(load) = U(sec)2/ P (assigned U sec P values), heating does not exceed the relevant limit for Class B components used in this const ruction. NOTE : When the t ransformer is intended to supply DC voltage and current in conjunction with rectifiers and smoothing capacitors, the VA power required from the t ransformer is far higher than the U(DC) and I(DC) product. To help you to determine the t rue t ransformer power, our Technical Department is at your disposal. AMBIENT TEMPERATURE (ta) The maximum temperat ure at which the t ransformer may be operated continuously under nominal conditions of use. It is the air temperat ure measu- red close to the t ransformer after therma