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1.Why does the engine oil and oil filter need to be replaced after a period of use?
During the running-in period of a new engine, it is inevitable that impurities will enter the oil pan, causing physical or chemical changes to the oil and oil filter. During the after-sales customer service process of the units sold by Guangda Smart Energy, we will have professional personnel carry out relevant maintenance for you.
2.Why do we require customers to tilt the smoke exhaust pipe down 5-10 degrees when installing the unit?
Mainly to prevent rainwater from entering the smoke exhaust pipe, leading to major accidents.
3.Generally, diesel engines are equipped with manual oil pumps and exhaust bolts. What are their functions?
Used to remove air from the fuel pipe before starting.
4.How to classify the automation level of diesel generator sets?
Manual, self start, self start with automatic mains power conversion cabinet, remote control, telemetry, and remote monitoring.
5.Why is the standard output voltage of the generator 400V instead of 380V?
Because there is voltage drop loss in the outgoing line.
6.What is the requirement that the use site of diesel generator sets must have smooth air flow?
The output of a diesel engine is directly affected by the amount and quality of air sucked in, and the generator must have sufficient air for cooling.So the use site must have smooth air flow.
7.Why is it not advisable to use tools to tighten the oil filter, diesel filter, and oil-water separator too tightly when installing them, and only need to manually screw them until there is no oil leakage?
Because if the sealing ring is tightened too tightly, under the action of oil bubbles and body heating, it will expand thermally and generate significant stress. Causing damage to the filter housing or separator housing itself. Even more serious is the damage to the body screws that cannot be repaired.
8.After purchasing a diesel generator set, which three key points should be verified first?
1) Verify the true useful power of the unit. Then determine the economic power and backup power. The method for verifying the true useful power of a unit is to multiply the 12 hour rated power of a diesel engine by 0.9 to obtain a data (kW). If the rated power of the generator is less than or equal to this data, the rated power of the generator is determined as the true useful power of the unit. If the rated power of the generator is greater than this data, the data must be used as the true useful power of the unit.
2) Verify which self-protection functions the unit has.
3) Verify whether the power wiring of the unit is qualified, whether the protective grounding is reliable, and whether the three-phase load is basically balanced.
9.There is an elevator with a starting motor of 22KW, how large should it be equipped with a generator set?
22 * 7=154KW (elevators are direct load starting models, and the instantaneous starting current is generally 7 times the rated current to ensure uniform movement of the elevator). (i.e. at least 154KW generator set should be equipped)
10.How to calculate the optimal operating power (economic power) of a generator set?
P optimal=3/4 * P rated (i.e. 0.75 times rated power).
11. How to convert the engine power of some generator sets expressed in horsepower to the international unit of kilowatt?
1 horsepower=0.735 kW, 1 kW=1.36 horsepower.
12.What is the relationship between apparent power, active power, rated power, maximum power, and economic power?
1) The unit of apparent power is KVA, which is commonly used in China to express the capacity of transformers and UPS.
2) The active power is 0.8 times the apparent power, in kilowatts. It is commonly used in power generation and consumption equipment in China.
3) The rated power of a diesel generator set refers to the power that can operate continuously for 12 hours.
4) The maximum power is 1.1 times the rated power, but only one hour of use is allowed within 12 hours.
5) The economic power is 0.75 times the rated power, which is the output power of a diesel generator set that can operate for a long time without time constraints. At this power, the fuel is the most economical and the failure rate is the lowest.
13.Why is it not allowed for diesel generator sets to operate for a long time below 50% of the rated power.
Increased oil consumption, easy coking of diesel engines, increased failure rate, and shortened overhaul cycle.
14.Is the actual output power of the generator during operation based on the power meter or the ammeter?
Based on the ammeter, the power meter is for reference only.
15.What is the cause of generator loss of excitation and how should we handle it?
The generator is not used for a long time, resulting in the loss of residual magnetism contained in the iron core before leaving the factory, and the excitation coil cannot establish the necessary magnetic field. At this time, the engine runs normally but cannot generate electricity.
Handling method:
1) Press the excitation button if there is an excitation button;
2) If there is no excitation button, use an electric battery to magnetize it;
3) Carry a light bulb load and operate at overspeed for a few seconds.
Is the actual output power of the generator during operation based on the power meter or the ammeter?
Based on the ammeter, the power meter is for reference only.
Why is it not allowed for diesel generator sets to operate for a long time below 50% of the rated power.
Increased oil consumption, easy coking of diesel engines, increased failure rate, and shortened overhaul cycle.
There is an elevator with a starting motor of 22KW, how large should it be equipped with a generator set?
22 * 7=154KW (elevators are direct load starting models, and the instantaneous starting current is generally 7 times the rated current to ensure uniform movement of the elevator). (i.e. at least 154KW generator set should be equipped)
After purchasing a diesel generator set, which three key points should be verified first?
1) Verify the true useful power of the unit. Then determine the economic power and backup power. The method for verifying the true useful power of a unit is to multiply the 12 hour rated power of a diesel engine by 0.9 to obtain a data (kW). If the rated power of the generator is less than or equal to this data, the rated power of the generator is determined as the true useful power of the unit. If the rated power of the generator is greater than this data, the data must be used as the true useful power of the unit.
2) Verify which self-protection functions the unit has.
3) Verify whether the power wiring of the unit is qualified, whether the protective grounding is reliable, and whether the three-phase load is basically balanced.
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