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Question:

What is sun shade? If the design temp. is 55 deg.c in the un shaded area, what should be temp. in shaded area?

Actually in position, we have provided shade for an electrical equipment but sun is hitting during morning and evening. Can it be called as a shaded area?

Answer:

Outside ambient temperatures are always measured in the shade away from direct sunlight. If your equipment is seeing direct sunlight in normally convective air, then you should use an infared remote sensing thermometer to measure different points on the outside and the inside of the equipment (if possible) to determine the ambient temperature (when exposed to direct sunlight). Alternately, you could place a thermistor, thermocouple, RTD, or semiconductor temperature sensor inside the equipment (always in the shade) and run wire leads outside the equipment container, then measure ambient temperature inside the equipment with a meter on the outside. .

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