Question

Мощность обогревателя 1,5 кВт, напряжение сети 220 В, предохранитель рассчитан на 5А . Можно ли пользоваться обогревателем ?

Answer 1

Нет. Нельзя.

Предохранитель должен выдерживать ток, чуть больший, чем тот, который протекает по нагревателю при его нормальной работе.

Так как  P = I*U, то:  I = P/U = 1500 : 220 = 6,82 (A),

то предохранитель, рассчитанный на ток 5А перегорит.

Answer 2

To determine whether you can use the heater safely, we need to check if the current drawn by the heater exceeds the capacity of the fuse (predохранитель).

Power (P) is given as 1.5 kW, and voltage (V) is 220 V. The formula to calculate current (I) is:

I = P / V

where: P = Power in watts (1.5 kW = 1500 watts) V = Voltage in volts (220 V)

Let's calculate the current drawn by the heater:

I = 1500 W / 220 V ≈ 6.82 A

The calculated current is approximately 6.82 Amperes. Since the calculated current is higher than the rated capacity of the fuse (5 Amperes), it means the heater will draw more current than the fuse can safely handle. In this situation, it is not safe to use the heater with the given fuse. You should use a higher-rated fuse or circuit breaker that can handle the current drawn by the heater, or consider using the heater with a lower power rating.