1. How to calculate the optimal power (economic power) of the generator set?
Answer: P is best = 3/4*P rated (that is, 0.75 times the rated power).
2. The state stipulates that the engine power of a general generator set should be greater than the generator power?
Answer: 10℅.
3. The engine power of some generator sets is expressed in horsepower. How to convert horsepower to international unit kilowatts?
Answer: 1 horsepower = 0.735 kilowatts, 1 kilowatt = 1.36 horsepower.
4. How to calculate the current of the three-phase generator?
Answer: I=P/(√3 Ucos φ), that is, current=power (watt)/(√3 *400(volt)*0.8). The simplified formula is: I(A)=unit rated power (KW)*1.8
5. What is the relationship between apparent power, active power, rated power, maximum power, and economic power?
Answer: 1) The unit of apparent power is KVA, which is used to express the capacity of transformers and UPS in our country; 2) The active power is 0.8 times of apparent power, and the unit is KW. Our country is used to power generation equipment and electrical equipment; 3) The rated power of a diesel generator set refers to the power that can be operated continuously for 12 hours; 4) The maximum power is 1.1 times the rated power, but only 1 hour is allowed within 12 hours; 5) The economic power is 0.75 times the rated power, It is the output power that the diesel generator set can run for a long time without time limit. When running at this power, the fuel is the least and the failure rate is the lowest.
6.Why is it not allowed for diesel generator sets to run for a long time when the power is less than 50% of the rated power?
Answer: Increased oil consumption makes diesel engines prone to carbon formation, which increases the failure rate and shortens the overhaul period.
7. The actual output power of the generator during operation is based on the wattmeter or the ammeter?
Answer: The ammeter shall prevail, the power meter is for reference only.
Post time: Jun-10-2021