Diesel generator 56 technologies questions and answers

1, How to combine two power sets? Installs with what completes and machines?

Answer: The use condition is two machines instantaneous voltages, the frequency, the phase is same. The general suggestion uses the completely automatic and the cabinet. Does not use manual-automatic switch Because of the success or the defeat is decided by the artificial experience if by manual The author is engaged in the electric power work by more than 20 years the experience with great courage to talk wildly, the reliable success ratio is equal to 0. Can may use by the city TV University electrical power system manual and machine, the concept apply mechanically the small electrical power system in no way, because of two protection rank completely dissimilar.

2, how many is the three-phase generator power factor? Can add the power compensator to enhance the power factor?

Answer: The power factor is 0.8. No you can not.

3, why do we request the customer, after the unit to move every time for 200 hours, must carry on item of all electric appliances contact elements the fastening work?

Answer: The diesel oil power set is the vibration work. Moreover many products use the double nut uselessly. Once the electric appliance fastener is lax, can have the very big contact resistance, cause the unit movement not to be normal.

4th, why generates electricity the engine room to have to guarantee clean, the ground does not have the quicksand?

Answer: The diesel engine if inspiration dirty air can cause the power to drop; The generator inspiration sand can cause the insulation breakdown between the rotor gap, heavy causes to burn down.

5th, why our company not to suggest user when installment uses the neutral point earth?

Answer: 1)Nowadays the electrical machinery self- adjustment function big enhancement newly;

2) Practices discovered that neutral point earth unit the thunder and lightning failure rate is high.

3) The quality requirement to be high, the common user is unable to accomplish. The unsafe working was inferior to does not earth.

4) Neutral point earth unit can cover the load the leakage breakdown and the earth mistake, but these breakdowns and wrongly are unable in the city TV University electric current power supply situation to expose.

6, No earth to the neutral point the unit, what question when the use should pay attention to?

Answer: 0 possible charged, because between the firing line and the neutral point electric capacity voltage is unable to eliminate. The operator must regard 0 is a charged body.

7, How to combine UPS and diesel electric engine, can guarantee UPS outputs stably?

Answer: 1) UPS indicated generally with apparent power KVA that, rides first it 0.8 converts with generator active power consistent unit KW.

2) if uses the common generator, then by the UPS active power while by 2 determined allocates the electrical machinery power, is the generator power is UPS power two times.

3) if uses brings PMG (permanent magnetism machine excitation) the generator, then rides by the UPS power by 1.2 determined the generator power, is the generator power is the UPS power 1.2 times.

8, The electron marks pressure resistance 500V may use in the diesel electric engine control cabinet?

Answer: May not. Because on the diesel oil power set marks the 400/230V voltage is the active voltage. Its peak voltage is the active voltage 1.414 times. Namely the diesel electric engine peak voltage is Umax=566/325V.

9, All of the diesel oil power sets have protection function?

Answer: . At present in the market even the belt which has in the same brand unit, has does not bring. When purchase user must clarify. Best wrote the written material to take the contract appendix. The low price machine does not bring the protection function generally.

10, how distinguishes produced diesel engine?

Answer: Whether there is leaves the plant certificate and the product certificate, they are request of the diesel engine. Verifications in the Ming edition three big serial numbers 1) the data plate serial number; 2) organism serial number, 3) oil pump data plate serial number. Checkup these three big serial numbers and the diesel engine actual serial numbers, must be unmistakable. If has any questions contact with the factory.

11, Take over the diesel oil power set, which three main points first has to verify?

Answer: 1) verifies the real useful power of the unit. Then verifies the economy and standby power. The method of checked the unit real useful power is: The diesel engine 12 hours rated powers ride by 0.9 obtains a data (kw). If the generator rated power is smaller than or equal to this data, then this unit real useful power by the generator rated power. If the generator rated power is bigger than this data, then this data is the real useful power.

2) Verifies the unit has protection function.

3) Verifies the electric power wiring whether qualified, the protective whether reliable, three-phase shoulders whether basically balances.

12, The elevator starting motor is 22KW, should match the big power set?

Answer: 22*7=154KW (elevator for direct belt load start type, instantaneous starting current for nominal current 7 times, can guarantee elevator makes uniform motion generally). (Namely should match 154KW at least the power set)

13, How to calculate power set's best use power (economical power)?

Answer: P best=3/4*P fixed (namely 0.75 time of rated powers).

14, How many the general power set's engine power be bigger than the generator power?

 Answer: 10 %.