For a 100kw generator, only 50kw of load is connected. Will the generator generate only 50kw or 100kw? If it generate 100kw what happens to rest of the 50kw. What happens if we connect more than 100kw of load?

Editorial / Best Answer

Answered by: joe

  • Dec 23rd, 2006


100 kw is the full load rating of the generator..... ..that means it can supply 100 kw without exceeding in specified temperature limits .that doesnt mean that it wont be able to supply a load more than 100 kw,it can but not for a longer period of time.after sometime the generator will burn out.if a load of 50 kw is connected to generator the generator will generate only 50 kw& not more than that.the generator will generate power only according to the requirement.

Showing Answers 1 - 6 of 6 Answers

Vicken

  • Dec 6th, 2006
 

The generator provides only what the load requres. Therefore For a 50Kw load, the generator supplies 50KW (plus minor losses) to the load. There is no additional 50kw left over.

When the generator load exceedes its capacity of 100KW, the alternator winding ends up in flames because the wires making up the alternator winding overheat and lose their insulation causing serious short circuit.

suresh

  • Dec 9th, 2006
 

Generator generathing power is constant, but output is dependig on load that we are connecting. suppose we connect 50kw for 100kw, output voltage is same for any type of load,let that is 250v power =p, resistace=rfor 50kwr=v2/r=250*250/50=1250 ohm, for100kwr=250*250/100=625so i conclude that we increasing load means indirectly we decreasing load resistance because we connecting across the suppply means resistance in parellel,so current will increase power automatically increses and vice-versa.

ashvin

  • Dec 9th, 2006
 

Generator will generate 100KW because generator should run always its full load capacity otherwise generator efficiency will be reduce.so extra 50KW power will be give to the another load or it may be in form of loos or otherwise give power to the beside state who require it........ 

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Hitesh

  • Dec 16th, 2006
 

If we have 100KW generator and load is 50Kw, generator generate only 50kw.

If we have 100KW generator and connected more then 100KW, the generator tripped at overload.

dipen k patel

  • Dec 19th, 2006
 

If the generator is 100kw and the load is 50kw the gen. will operate at 100kw and when more than 150kw load it will operate at 100kw but the line losses increases.

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joe

  • Dec 23rd, 2006
 

100 kw is the full load rating of the generator..... ..that means it can supply 100 kw without exceeding in specified temperature limits .that doesnt mean that it wont be able to supply a load more than 100 kw,it can but not for a longer period of time.after sometime the generator will burn out.if a load of 50 kw is connected to generator the generator will generate only 50 kw& not more than that.the generator will generate power only according to the requirement.

Gourav Kundu

  • Jan 31st, 2007
 

The Generator will have to run at a particular speed. The power produced will depend on the current produced that is p=vi .The current will say how much the is produced as the voltage is constant. As the current increase the field current increase(Hoping the reader knows the cause).So no extra 50kw is generated

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cvk

  • Oct 5th, 2007
 

The generator is capable of generating 100KW. But since the load requirement is only 50KW, it generates 50KW in addition to the losses.

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andyarok

  • Apr 11th, 2008
 

Hello........

In both cases Generator may pull out of synchronism as running a machine underloaded or overloaded too much for long time is undesirable as machine parameters change & rotor angle  varies  significantly.  Rotor shaft may damage as well
 

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saisln

  • Dec 14th, 2008
 

If 100KW capacity generator connected with 50kw load ,Then that generator loaded to 50% of its capacity. The excitation current varies according to the load that had been added to DG sets.

Loading of dg sets also depends upon the power factor. If we load high inductive load may cause increase in current which will trip the genset in over current trip.

Gen. dg sets capacity are mentioned only in KVA rating.

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Generator maximum power output rating is 100kw. If you obtain 50kw from it autonatically using governer control the steam injection to primemover will decrease and hence 50 kw will be produced automatically. It is feedback control system model.  But if you overload it may not move governor to that much higher steam pressure and hence  the  supply frequency will  decrease.  Continuing this practise for a  long time may  burnout  generator windings.

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The generator will generate 100kw, and the rest of the 50kw will be dissipated, because power can not be preserved. with more than 100kw of load, the generator will run below it's efficiency; ie, it will be overloaded and will give a lower output.

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Rhombus

  • Jun 11th, 2011
 

Let me explain it to u...what happens that in a power plant when generator generates power the engineers at the control and instrumentation have a constant look on the varying load..as u know the electrical energy cannot b stored we produce exactly 50kw energy..........and that can be done by adjusting the amount of coal through the feeders in the boiler..!! And while talking about that if the generator is over loaded in that case till some amount of load the frequency of generator will drop down and when the load is further more increased in that case the generator will TRIP..!!

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cfanez

  • Jul 14th, 2011
 

Generator operating at 50Kw of rated value of 100kW will work however,it not appropriate operating a generator below optimal capacity. It is better to load generator at about 80% of its rated capacity for optimal performance. If it is operated 50kW for a long time,the generator may start smoking due mechanical reasons I will not dwell with here. However, some generators it can be loaded to full capacity and about 20% percent above capacity for a limited time say 1hr and allowed to cool before loading again.

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AJAI VAIDYANATHAN H

  • Mar 21st, 2017
 

The generator is designed to generate power at 50Hz frequency. If you are going to load your 100Kw generator with only 50Kw, then the input should be a little more than 50KW based on the generator efficiency. If you give a 100KW input then the output will change accordingly. 2*pi*N*T is the input for generator. Due to reduced load, torque produced is not enough hence to maintain the equation of power N increases. So, the generator runs at a higher speed, resulting in a higher frequency. But the problem that will arise with this high speed is that your generator is designed to run at a particular speed. Hence the generator reaches instability and ultimately mechanical breakdown occurs.

If you are going to load your 100KW generator with say 50KW. The speed of the generator reduces to maintain the output power as the torque of the generator increases due to increase in loading. This will lead to drop in the frequency of the output power. Again when the output is going to vary in large quantity from the design value the same problem occurs. Windings get heated and burn out leading to collapse in the power system due to instability.

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Mayilsamy Kasipandi

  • Jul 11th, 2017
 

The Generator produce the power is exactly what we withdraw as load. 100 kw genset can produce 1 kw to 115kw power depending upon the connected/withdrawing load. Normally the generator can produce 115% of designed rating.

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Dharmender

  • Feb 7th, 2018
 

Connected Load is 96kw &125kvaDG set will have run stand by unit for Hotel is suitable plz give your technical supporting answer

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