1, the two generators weaver use condition is what? What kind of device to complete the weaver to work?

Answer: weaver use condition is two machine moment at the same voltage, frequency and phase. Commonly known as the "three" at the same time. To complete and with specialized designer

Machine work. General advice using automatic and cabinets. As far as possible need not manual weaver. Because manual weaver's success or failure depends on human experience. Based on more than 20 years experience working in the field of electric power, dared to diesel generator manual weaver reliable success rate is zero. Never to mains Power system available manual designer to apply the concept of small power supply system, because of the two completely different protection level.

2, how much is the power factor of three-phase generator? Power can be added to improve the power factor compensator?

Answer: the power factor of 0.8. Can't, because the capacitor charge and discharge can cause small power fluctuations. And the oscillation unit.

3, why we ask customer, each running 200 hours, want to undertake a all electrical contact member fastening work?

A: diesel generating set is a work unit vibration. And many of the domestic production or assembly unit should use double nut doesn't work. The use of spring washers Use, once the electrical fasteners, lax, can produce a lot of contact resistance, led to the unit operation is not normal.

4, why generator room must ensure that clean, the ground has done?

A: diesel engine if inhaled dirty air can reduce power; Impurities such as generator if the suction sand will make the insulation of the stator gap between damage, the person that weigh Cause fire.

5 why, since 2002 our company generally does not suggest user to adopt neutral point grounding when installation?

Answer: 1) a new generation of generator self adjusting function greatly enhanced;

2) found in the practice of neutral point grounding lightning high failure rate of the unit.

3) the ground higher quality requirements, general users can't do it. Grounding worse than no unsafe work.

4) neutral point grounding will hide the unit's load of leakage fault and grounding errors, and these failures and mistakes in the mains no large current supply situation Method exposure.

6, the neutral point grounding unit, what problems should be paid attention to when using?

A: 0 line may be charged, because the capacitance between the wire and the neutral point voltage cannot eliminate. The operator must see 0 line as a charged body. Not according to the city

Electricity used to handle.

7, how UPS and diesel generator power facilities, in order to guarantee the stability of UPS output?

Answer: 1) the apparent power is commonly used in KVA UPS said it first in the conversion by 0.8 KW consistent with generator active power units.

2) if the general generator, the active power UPS multiplied by 2 to determine the distribution of motor power, namely power generator for UPS power two times .

3) if the PMG (permanent magnet machine excitation) generator, with UPS power multiplied by 1.2 to determine the generator power, namely the power generator for UPS

The power of 1.2 times.

8, indicate the withstand voltage of 500 v electronic or electrical components, can be used for diesel generator control cabinet?

A: can't. As shown on the diesel generating set 400/230 v voltage for effective voltage. The peak voltage for effective voltage of 1.414 times. The diesel generator peak voltage for Umax =566/325 v.

9, all diesel generator set with self-protection function?

A: no. Even in the same brand of units on the market at present some belt, some without. When buying a unit users must understand yourself. The best written written materials as attachment. Generally low price machine belt in self protection function.

10, how to identify fake fake domestic diesel engine?

A: check whether the factory certification and product certificate, they are the "identity" diesel engine factory, is a must. Check the certificate of On the three large number 1) nameplate number; The body number (2) general mechanical machining on the flywheel end lead on the physical plane, font for convex body ); Oil pump nameplate number 3). Will the three number with diesel engine on the actual number check, must be accurate and correct. If found to have doubt to this

The three Numbers reported to the factory to verify.

11, taking control of the diesel generator set operating electricians, verify which three points in the first place?

Answer: 1) to verify the real useful power of the unit. And then determine the economic power, and the standby power. Verification unit of real useful power of the method is: Diesel engine 12 hours reach by 0.9 rated power (kw), a data generator rated power is less than or equal to the data, the generator Real useful power power rating for the unit, if the generator power rating is more than the data, you must use the data as a real useful of the unit Power.

2) verify unit with what kind of self protection function.

3) electrical wiring of the unit to verify whether qualified, protective grounding is reliable, the three-phase load is basic balance. 12 of 22 kw, there is a elevator starting motor, generator set should match?

A: 22 * 7 = 154 kw (elevator for direct loading start models, instant starting current is rated current commonly 7 times, to ensure that the elevator as well The speed of movement). (i.e., should be at least 154 kw generator set)

13, generating set the best use of power, economic power) how to calculate?

A: P = 3/4 * P best rated (i.e., 0.75 times the rated power).

14, the provisions of the state general the engine power of the generator set should be larger than the generator power?

A: 10 ℅.

15, said some generator engine power with HP, HP and how the conversion between the international unit kw?

Answer: 1 HP = 0.735 kw and 1 mw = 1.36 horsepower.

16, three-phase generator current how to calculate?

A: I = P / 3 Ucos phi) ()

The current = power (watts) / 3 * 400 () (v) * 0.8).

Jane calculate formula is: (A) = I unit rated power (KW) * 1.8

17, apparent power, active power, rated power, the relationship between the maximum power, economic power?

A: 1) the apparent power unit for KVA, habit for expressing transformer and the capacity of UPS in our country.

2) 0.8 times that of active power to apparent power unit is the KW, used for power generation equipment and electric equipment in our country.

3) the rated power of the diesel generating set is refers to the power of 12 hours can run continuously.

4) maximum power is 1.1 times the rated power, but 12 hours allowed use only 1 hour.

5) economic power is 0.75 times the rated power, diesel generating set is not restricted by time can be long running power output. In the power operation

When fuel most provinces, low failure rate.

18, why not allow diesel generating set in the case of less than 50% rated power to run for a long time.

A: consumption engine oil, diesel engine easily carbon, and increased failure rate, shorten the repair cycle.

19, the operation of the generator when the actual output power will be subject to power meter or the ampere meter shall prevail?

A: will be subject to current meter, power meter for your reference only.

20, a generating set frequency, the voltage instability their problem is the motor or generator?

A: is that the engine.

21, a generator frequency stability, voltage instability problem is the motor or generator?

A: is that a generator.

22, how be to return a responsibility, magnetism loss should be how to deal with?

A: generating the captain time need not, cause before delivery contains the remanent magnetization in core, lose excitation coil can't afford to build its magnetic field, then the engine

Functioning but not sent out, this kind of phenomenon, new. Or long-term unused units more.

Processing methods: 1) there are excitation excitation button button, 2), without excitation button with a battery of magnetization, the load 3) with a light bulb

Overdrive, a few seconds.

23, generating set in a period of time and found the rest everything is ok but the power decrease, the main reason is what?

Answer: a, air filter is too dirty, inhalation of air is not enough, then must clean or replace air filters.

B, fuel filter is too dirty, fuel injection quantity is not enough, must be replaced or cleaned.

C, ignition timing is not straight, must adjust.

After 24, there is a generator load its voltage and frequency stability, but the current is not stable, where is the problem?

Answer: the problem is that customer load is not stable, and the quality is absolutely no problem.

25, a generator of frequency is not stable, the main problem in where?

A: the main problem is that the generator speed is not stable.

26, diesel generating sets in use critical must pay attention to what time is it?

Answer: 1) the water in the tank must be sufficient, and keep working in the allowed temperature range.

2) the lubricating oil must be in place, but not too much, and keep the allowed pressure within the scope of work.

3) stable at around 50 hz frequency, voltage stability at about 400 v.

4) three phase current within the rated range.

27, diesel generating sets often need to change or wash the parts of which a few are there?

A: diesel oil filter, oil filter, air filter. (the individual units and water filter)

28, the main advantage of the brushless generator is what?

Answer: (1) the carbon brush of maintenance;

(2) radio interference;

(3) reduce the excitation-loss fault.

29, domestic generator insulation class is generally?

A: MTK B; Marathon name-brand computer and leroy somer name-brand computer and institutes of name-brand computer for class H.

30, what gasoline engine fuel to gasoline engines, oil mixed?

A: two stroke gasoline engine.

31, diesel generating sets which six basic equipment, including the system?

Answer: (1) the oil lubrication system;

(2) the fuel system;

(3) control protection system;

(4) cooling cooling system;

(5) exhaust system;

(6) starting system,

32, why do we try to suggest customers to use in sales job I recommended by the oil company?

Answer: the oil is the blood of the engine, if customers to use unqualified oil will cause the engine bearing shell killed, the gear teeth, the crankshaft deformation

Fracture and other serious accidents, until the entire machine scrap.

33, why phone use after a period of time need to change the engine oil and oil filter?

A: have impurities in new period into the oil sump, oil and oil filter or chemical qualitative physical qualitative changes.

34, why do we ask the customer to install units, the exhaust pipe to tip down 5-10 degrees?

A: in case of the rain into the exhaust pipe lead to major accidents.

35, generally are equipped with manual oil pump and diesel engine exhaust bolt, what is its function? A: is used to eliminate air in the fuel pipe before launch

Gas.

36, diesel generating sets automation level how cent?

A: since the launch of manual, since the launch, and automatic mains switch cabinets, three away over a long distance (remote control, remote sensing, remote prison.)

37 and why generator outlet voltage standard is rather than 380 v, 400 v?

Answer: because the qualification after the line voltage drop loss.

38, why must require the use of the diesel generator set field air flow?

Answer: the output of the diesel engine is directly affected by inhalation of air quantity and air quality, generators and must have a plenty of air for cooling. so

Using field must be air flow.

39, why in the installation of the oil filter, diesel filter, oil-water separator is unfavorable use tools to the above three overwind, just by hand

Spin to no oil can?

Answer: because if overwind its sealing ring through the body under the action of temperature and the oil bubble, thermal expansion, will produce a lot of stress. Lead to filter shell

The damage of the shell itself or separator. More serious is the body the self-contained mother of damaged beyond repair.

40, customer purchase since the launch, but not buy automatic switch cabinet also can have what good?

Answer: 1) once the power enterprise, the unit will start automatically, to speed up the artificial transmission time.

2) if, in the front of the air switch from the flare path can also ensure room lighting is not affected by power cuts, with convenient operating personnel work;

41, generator set, meet what condition before switching power?

A: water chilling unit, water temperature reached 56 degrees Celsius.

Air cooling unit, the body heat.

No-load voltage when frequency is normal. Oil pressure is normal. Before switching power.

What is 42, boot loading after sending order?

A: load from big to small in turn.

43, shutdown before discharge load sequence is what?

A: load from small to large, in turn off the last power off.

44, why can't load shutdown, boot?

Answer: load off emergency stop, the larger impact to unit. Loading boot belong to illegal operation of power generation equipment will bring damage electrical equipment

.

45, winter use diesel generators should pay attention to?

Answer: 1) pay attention to the water tank must not be frozen, special methods to prevent its long-term rust and antifreeze or use electric heating equipment assurance at room temperature in the freezing point

On.

2) it is forbidden to open fire.

3) light preheat time slightly longer, before sending.

46, the three phase four wire system is going on?

Answer: the generator outlet there are four, including 3 root for wire, 1 zero thread. Between the wire and wire voltage of 380 v. For between wire and the zero line

220 v.

47, three phase short circuit is going on? What consequence can you produce?

Answer: the line of fire between without any load, short circuit is the three-phase short circuit directly. The consequences is very terrible, serious can lead to a machine apart.

48, the so-called power is how to return a responsibility? Which two will produce serious consequences?

A: self-provided power pattern to the enterprise of sending call either. There are two serious consequences:

A) enterprise is not a power outage, the enterprise power supply with self-provided generator power to produce the weaver during this period, the unit shall be destroyed. If the self-provided generator capacity is larger,

Still can make enterprise oscillate.

B) enterprise has been a power outage is overhaul, the self-provided generator power. Power supply departments will make the maintenance staff to electrocution.

49, why debugging personnel must check it again before debugging unit all fixed bolt is fixed in good condition? Whether all line interface

In good condition?

A: the unit go a long way, sometimes hard to avoid has the self-contained bolts and line interface loose or falls off, light person affect debugging, or damage to the machine.

What energy level 50, power belong to? What is the characteristics of alternating current (ac)?

A: power belongs to the secondary energy, alternating current (ac) by the mechanical energy conversion, dc by the transformation of chemical energy, the characteristics of alternating current (ac) cannot be stored

, we are in.

Universal symbol of 51, domestic generators GF stand for?

A: on behalf of the double meaning:

A) work frequency electrical unit that is suitable for our country general 50 hz power generating set.

B) domestic generator sets.

52, generator with the load in use must be a balance of three phase?

A: yes. Maximum deviation shall not be more than 25%, no lack of phase operation.

53, four stroke diesel engines is refers to the four stroke?

A: suction, compression, power, and exhaust.

The biggest difference between 54, diesel engine from a gasoline engine in where?

Answer: 1) different pressure in cylinder.

Diesel engine in the compression stroke phase is to compress the air;

Gasoline engine in the compression stroke phase is to compress gas and air mixture.

2) the ignition in a different way.

Diesel engine on atomizing diesel spray to the high pressure gas combustion;

Rely on gasoline engine spark plug ignition.

55, electric power system of "two ticket SanZhi" specific what be to point to?

A: two votes refers to the working ticket and operation. Any work on the electrical equipment and operation. Must first get issued by shift leader

Working ticket and operation. The parties shall be implemented according to the ticket.

SanZhi refers to the handing-over system, inspection tour system, equipment periodically switch system.

56, the world's first practical engine was born in when, where, who is the inventor? The current status?

Answer: the world's first diesel engine was born in 1897 in Germany of Augsburg (Augsburg), was the founder of the by MAN Rudolf

The invention of the Diesel. The Diesel engine's English name is the name of the founder of Diesel.

MAN is the most professional diesel engine manufacturing company in the world today, up to a maximum of 15000 kw capacity. The main is the ocean shipping industry

Power suppliers. China's large diesel power plant also depend on MAN, such as guangdong huizhou dongjiang power plant (100000 KW). Foshan power plant (80000

KW) unit for MAN.

   At present, the world's first diesel engine were kept in the German national museum of the exhibition hall.