Diesel Generator Parts and its Functions ¦ Major Parts of DG Set .

Hello guys, welcome to my channel. This is Uday Pandit and you are watching MAP Technical World. If you guys are not yet subscribed my channel, please subscribe my channel so you will get notification regarding my upcoming videos. In this video, we'll learn about major parts of diesel generator. Working of diesel generator we have already discussed in previous video. So, I have given a link in this video description box. So, let's discuss the major parts of the diesel generator. So, what are the major parts of diesel generator? These are DG canopy, base frame, diesel tank, fuel water separator filter, fuel filter, air filter, turbocharger, diesel engine, exhaust system, silencer, coolant tank, radiator and fan, lubricant oil full flow filter, live oil bypass filter, battery, battery charging alternator, DC starter motor, alternator, AVR, governor, control panel and finally circuit breaker. So, let's discuss each parts one by one. So, come to DG canopy. So, basically DG canopy is the enclosure of the alternator or diesel engine. Basically, it provides physical protection or mechanical protection and due to this also sound level of DG is reduced. Now, next is DG frame. So, this is the DG frame which supports the engine and alternators. Now, come to next which is diesel or fuel tank. So, this is the external tank where we can store the diesel and this is the horizontal diesel tank. So, this is DG itself diesel tank and this is the fuel indicator. We can monitor the fuel level of DG from this. In case fuel is at low level then we will transfer the fuel from external tank to DG fuel tank and some of DG have also vertical type fuel tanks. Now, come to next part which is water separator filter. So, this is the view of water separator filter. So, this water separator filter as you can see over here it's fitted inside the generator. So, actually what it does it separates the mixed water from the fuel then separated fuel from water is passed to the fuel filter and we can drain the separated or collected water with the help of this valve. In this way it increases the efficiency of engine or we can say also it increases the life span of diesel engine. Now, next is fuel filter. So, this is the view of fuel filter as you can see in this DG. So, this is the fuel filter as you can see in this DG. This filter removes the impurity from the fuel. It can supply pure fuel to the engine. Now, come to next which is air filter. So, this is the air filter. So, basically what it does it purifies the air. So, there are two air filters used in DG system. One for exhaust gas filter system and one for surrounding air filter system which air supply to the combustion chamber of diesel engine and this is the vacuum indicator which gives the signal in case of this filter stop which is fitted over here. Now, come to another part which is turbocharger. So, this is the basic view of turbocharger. This turbocharger actually fitted in here as you can see over here. If you talk about its function it helps to remove the exhaust gas by using exhaust system as you can see over here and another major function of the turbocharger is it sucks the surrounding air through the air filter and pressurized air is supplied to the combustion engine through the intake valve. In this way it increases the efficiency of the diesel engine. Now, next is diesel engine. So, this part is the diesel engine of the DG set. So, diesel engine actually produces the mechanical power which rotates the alternator shaft. Now, come to next silencer and exhaust system. So, this is the silencer which is at the top of the DG. So, this is the part of the exhaust system where the exhaust gases or burnt gases or smoke is also filtered by this silencer and DG can exhaust the smoke or burnt gases from the stack. So, this is the basic view of silencer and exhaust system. Now, come to next part which is cooling system of the DG. It consists of coolant expansion tank. So, this is the coolant expansion tank and heat exchanger or we can say radiator and this is the thermostatic valve and coolant pump, radiator fan. It is driven by the crankshaft of the engine as you can see over here. Actually, cooling system of the DG maintains the temperature of the engine at 80 degree Celsius. Now, come to next which is full flow lubricant oil filter and bypass oil filter. So, this is the full flow lube oil filter and this is the bypass oil filter. Actually, this full flow oil filter is filtered the lube oil or removes the impurity from the lube oil and it's applied to the engine. Hence, it maintains the frictionless engine parts. In case, full flow filter is stopped, at that time bypass valve will open and this lube oil is diverted towards the bypass filter and it is supplied to the engine well fan. In this way, we can prevent the engine from overheated and engine seize. So, this is the basic function of this filter. Now, come to next part which is DG battery and its charging systems. So, there are two batteries used in DG having its battery voltage is 12 volt and these two batteries are connected in series. Hence, output voltage will be 24 volt. So, this battery is charged through this charging alternator. So, this is the pulley, this alternator rotor is rotated through the main alternator by means of driven belt. So, in this way, it generates the voltage and this voltage is controlled by this charging controller and this charging controller is charged the battery. Now, come to next which is a starter DC motor. So, this is the view of a starter DC motor. We can also say DG starter. So, this motor helps to start the diesel engine and this motor is operated through the DG batteries. Its terminal is connected to here and whenever it starts the DG and DG attains approximately 90 percent RPM at that time, this starter DC motor automatically stops. Now, come to other part which is alternator. So, alternator, this is the alternator. Alternator is a device or equipment which produces mechanical energy into electrical energy. Now, come to next part which is AVR, automatic voltage regulator. So, actually AVR maintains the constant output voltage and also controls the DC excitation of the alternator. So, in this picture, we can see over here, this is the AVR controller. With the help of it, we can control the output voltage of the alternator and excitation of the alternator. Suppose, we have set the reference voltage 415 voltage and AVR is taking feedback voltage from the output terminal of the alternator. So, this controller will compare the output voltage with the reference voltage. According to the error signals, difference between reference voltage and feedback voltage, as per that, it controls the DC excitation of the field winding of the alternator. In this way, it maintains the constant output voltage. Now, come to other parts which is governor. Actually, governor controls the RPM of the alternator shaft and also frequency of the alternator according to the load requirements. So, in this picture, this is the governor controller and actuator. This is the fuel supply control valve and this is the diesel engine and this is the fuel supply hose. Now, we have two conditions over here. In case, DG is operating at 30% load, at that condition, this governor controller will sense the RPM of the rotor with the help of magneto speed sensor and according to that, it gives the signal to the actuator and this actuator operates the valves according to the load requirements. So, at this condition, fuel supply valve is partially open and diesel is allowed to enter the diesel engine. Another condition, in case, DG is operating at about 80% load, this governor will send the signal to actuator and this actuator fully opens the fuel supply valve and allows the fuel supply to the diesel engine. So, in this way, we can say governor helps to save the diesel in case DG is operating at low load. So, this is the basic operation of the governor. Now, come to another part, which is control panel. So, this is the basic view of control panel. As we can see over here, it is fitted over here. So, actually, with the help of this, we can monitor the diesel engine and alternator parameters like line-to-line voltage, phase currents, frequency, diesel engine RPM, etc. And with the help of this, we can also start and stop the DG. Now, come to another part, which is circuit breaker. So, circuit breaker. So, this is the MCCB actually fitted at output terminal of the DG and from the output terminal of the MCCB, cable is connected to synchronization panel or ATS panel and finally to the load. So, actually, this circuit breaker or MCCB protects the alternator from the overload condition, short circuit condition. So, these are the major parts of diesel generator or DG sets we have discussed. Hope you understand it. So, thank you for watching this video. Hope you like this video. Please like, share, comment and subscribe my channel and also hit the bell icon. So, you will get notification regarding my upcoming videos related to electrical, plumbing, HVAC as well as AutoCAD drafting. So, thank you very much. See you again in next video.