Incandescent bulb consumes 6 / 25 kwh per hour, while energy-saving bulb only consumes 1 / 40 kwh per hour. How many kwh can be saved by using energy-saving bulb for 10 hours compared with incandescent bulb?

10X(6/25 -1/40)
=10X43/200
=2.15 kWh

50 kW three-phase motor hour how much electricity, current is how much, how to calculate

The 50 kW on the motor name brand refers to the rated output power of the motor shaft, not the power consumption. The rated current of this motor is about 100 a. the power consumption per hour is related to the load at that time. Generally, the design of machinery is about 80% of the motor power, that is to say, the power consumption of a 50 kW motor is about 40 degrees when it works normally, which is even lower in textile equipment

How many kilowatt hours does a motor use
It's not ideal. It's practical. How many kilowatts of electricity do you need?

When the motor is at full load, the power consumption per hour is 1 kWh (kWh, kwh, 1 kW electrical appliances consume 1 kwh per hour)

The price of type a refrigerator sold in shopping malls is 2190 yuan per unit, and the daily power consumption is 1 degree, while the price of type B energy-saving refrigerator is 10% higher than that of type a refrigerator, but the daily power consumption is 0.55 degree? (calculated according to the service life of 10 years, 365 days per year and 0.40 yuan per kilowatt hour)

If a supermarket sells a refrigerator at a discount of X, it will be cost-effective for consumers to buy it. According to the question, it is 2190 × 10 + 365 × 10 × 1 × 0.4 ≤ 2190 × (1 + 10%) + 365 × 10 × 0.55 × 0.4, that is 219x + 1460 ≤ 2409 + 803. Solving this inequality, it is cost-effective for consumers to buy a refrigerator at least at a discount of 20%

Incandescent bulb consumes 6 / 25 kwh per hour, while energy-saving bulb only consumes 1 / 40 kwh per hour. How many kwh can be saved by using energy-saving bulb for 10 hours compared with incandescent bulb?