1. What are the six systems included in the basic equipment of diesel generator sets?

(1) Oil lubrication system;

(2) Fuel system;

(3) Control and protection system;

(4) Cooling and heat dissipation system;

(5) Exhaust system;

(6) Start the system.

2. Why does a new machine need to have its oil and oil filter replaced after a period of use?

During the running in period of the new engine, it is inevitable that impurities will enter the oil pan, causing physical or chemical changes in the oil and oil filter.

3. Why do we require customers to install the unit with the exhaust pipe tilted downwards by 5-10 degrees?

Mainly to prevent rainwater from entering the smoke exhaust pipe, leading to major accidents.

4. Generally, diesel engine sets are equipped with manual oil pumps and exhaust bolts. What are their functions?

Used to remove air from the fuel pipes before starting.

5. 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

6. Why is the standard output voltage of a generator 400V instead of 380V?

Because there is voltage drop loss in the outgoing line.

7. 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 intake, and the generator must have sufficient air for cooling. So the use of the venue must have smooth air flow.

8. 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 rotate them until there is no oil leakage?

Because if the rotation is too tight, the sealing ring will expand due to the action of oil bubbles and body heating, generating significant stress. Causing damage to the filter housing or separator housing itself. More seriously, it leads to damage to the body screws, making it impossible to repair.

9. 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 rated power and standby power. The method for determining the true useful power of a unit is to multiply the rated power of the diesel engine for 12 hours 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, this 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.

10. How large a generator set should be equipped for an elevator with a starting motor of 22KW?

22 * 7=154KW (The elevator is a direct load starting model, and the instantaneous starting current is generally 7 times the rated current to ensure uniform motion of the elevator). (i.e. at least 154KW generator set should be equipped)

11. 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).

12. How much higher should the engine power of a general generator set be than the generator power according to national regulations?

According to national regulations, the engine power of a general generator set should be 10% higher than the generator power.

13. How to convert the engine power of some generator sets expressed in horsepower to the international unit of kilowatts?

1 horsepower=0.735 kW, 1 kW=1.36 horsepower.

14. 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, measured in kilowatts, and 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 1 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, fuel is the most economical and the failure rate is the lowest.

15. 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 carbonization of diesel engines, increased failure rate, and shortened overhaul cycle.

16. 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.

17. What is the cause of generator demagnetization and how should it be handled?

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, magnetize it with an electric battery;

(3) Carry a light bulb load and run at overspeed for a few seconds.

Guangzhou Saiwei Energy Technology Co., Ltd. is a comprehensive enterprise specializing in design, production, and generator installation. Guangzhou Saiwei has many years of experience in engineering design and installation services. For many years, Guangzhou Saiwei has been committed to providing every customer with comprehensive products and energy solutions, including technical consulting, whole machine and generator supply, operation training, etc., with leading technology and first-class quality. The product range covers land diesel generator sets, marine generator sets, high-voltage generator sets, etc., and is widely used in industries such as power, communication, iron towers, healthcare, financial systems, data centers, etc. Welcome to inquire: 13302262088