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TROUBLE-SHOOTER’S GUIDE TO MOTOR OVERLOAD Use a clamp on the meter to check the amps when the motor is running to identify if there is an overload occurring. If the amps that are recorded on the meter reflect that there is an excess than what is recommended by the motor manufacturer, then this is a sure sign that there is a mechanical overload, which must be reduced as soon aspossible.
CHARACTERISTICS OF DC MOTORS Characteristics of DC motors. Generally, three characteristic curves are considered important for DC motors which are, (i) Torque vs. armature current, (ii) Speed vs. armature current and (iii) Speed vs. torque. These are explained below for each type of DC motor. These characteristics are determined by keeping the following two relationsin mind.
BASIC CONSTRUCTION AND WORKING OF A DC GENERATOR A dc generator is an electrical machine which converts mechanical energy into direct current electricity.Above figure shows the constructional details of a simple 4-pole DC generator. A DC generator consists two basic parts, stator and rotor. Basic constructional parts of a DC generator are described below. TYPES OF UNDERGROUND CABLES Classification based upon number of conductors in the cable. Single core cable. Three core cable. Typically, an Underground cable has either one, three or four cores. These cables are of course, constructed accordingly. Underground cables are usually employed to deliver 3 phase power. A 3 cored cable is preferred up to 66 kV. SYNCHRONOUS GENERATOR VS. INDUCTION Difference between synchronous generator and induction generator. In a synchronous generator, the waveform of generated voltage is synchronized with (directly corresponds to) the rotor speed. The frequency of output can be given as f = N * P / 120 Hz. where N is speed of the rotor in rpm and P is number of poles. SPEED CONTROL METHODS OF DC MOTOR Speed control of Shunt motor. 1. Flux control method. It is already explained above that the speed of a dc motor is inversely proportional to the flux per pole. Thus by decreasing the flux, speed can be increased and vice versa. To control the flux, a rheostat is added in series with the field winding, as shown in ELECTRICALEASY.COMELECTRICAL MACHINESPOWER SYSTEMASK A QUESTIONCONTACTWRITE FOR USMISCELLANEOUS The working of the inverter generator ensures the constant frequency. The engine runs the alternator to generate the AC electricity, which is converted to DC and then again AC.The whole process is controlled with the help of a microprocessor.. When the load is less, the microcontroller will reduce the speed of the engine, and so the noise is also reduced, while the frequency remains the same. HOW TO FIX A POWER INVERTER? It will help you get the new part in its place correctly. 6. Test the inverter. Once you have the new parts installed to the old faulty parts and shouldered on the places if necessary, now is the testing time. Connect the inverter to your battery and plug it in a controlled and limited power like a low voltage lamp. CHARACTERISTICS OF DC GENERATORS The above figure shows a typical no-load saturation curve or open circuit characteristics for all types of DC generators. 2. Internal or Total Characteristic (E/I a) An internal characteristic curve shows the relation between the on-load generated emf (Eg) and the armature current (I a).The on-load generated emf Eg is always less than E 0 due to the armature reaction. CAPACITANCE OF UNDERGROUND CABLES Hence capacitance of underground cables is much more than that of Overhead lines. The most important factor that is affected by this is the Ferranti effect. It is more pronounced in cables than in lines. This induces several limitations. Also, with increased capacitance,the
CHARACTERISTICS OF DC MOTORS Characteristics of DC motors. Generally, three characteristic curves are considered important for DC motors which are, (i) Torque vs. armature current, (ii) Speed vs. armature current and (iii) Speed vs. torque. These are explained below for each type of DC motor. These characteristics are determined by keeping the following two relationsin mind.
TROUBLE-SHOOTER’S GUIDE TO MOTOR OVERLOAD Use a clamp on the meter to check the amps when the motor is running to identify if there is an overload occurring. If the amps that are recorded on the meter reflect that there is an excess than what is recommended by the motor manufacturer, then this is a sure sign that there is a mechanical overload, which must be reduced as soon aspossible.
BASIC CONSTRUCTION AND WORKING OF A DC GENERATOR A dc generator is an electrical machine which converts mechanical energy into direct current electricity.Above figure shows the constructional details of a simple 4-pole DC generator. A DC generator consists two basic parts, stator and rotor. Basic constructional parts of a DC generator are described below. TYPES OF UNDERGROUND CABLES Classification based upon number of conductors in the cable. Single core cable. Three core cable. Typically, an Underground cable has either one, three or four cores. These cables are of course, constructed accordingly. Underground cables are usually employed to deliver 3 phase power. A 3 cored cable is preferred up to 66 kV. SYNCHRONOUS GENERATOR VS. INDUCTION Difference between synchronous generator and induction generator. In a synchronous generator, the waveform of generated voltage is synchronized with (directly corresponds to) the rotor speed. The frequency of output can be given as f = N * P / 120 Hz. where N is speed of the rotor in rpm and P is number of poles. SPEED CONTROL METHODS OF DC MOTOR Speed control of Shunt motor. 1. Flux control method. It is already explained above that the speed of a dc motor is inversely proportional to the flux per pole. Thus by decreasing the flux, speed can be increased and vice versa. To control the flux, a rheostat is added in series with the field winding, as shown inELECTRICALEASY.COM
The working of the inverter generator ensures the constant frequency. The engine runs the alternator to generate the AC electricity, which is converted to DC and then again AC.The whole process is controlled with the help of a microprocessor.. When the load is less, the microcontroller will reduce the speed of the engine, and so the noise is also reduced, while the frequency remains the same. CHARACTERISTICS OF DC GENERATORS The above figure shows a typical no-load saturation curve or open circuit characteristics for all types of DC generators. 2. Internal or Total Characteristic (E/I a) An internal characteristic curve shows the relation between the on-load generated emf (Eg) and the armature current (I a).The on-load generated emf Eg is always less than E 0 due to the armature reaction. ELECTRICAL SAFETY INSPECTION: IMPORTANCE AND CHECKLIST A proper electrical safety inspection will: Identify electrical wiring and components that may have degraded over time. Reveal if any electrical circuits are overloaded. Reveal if any lack of earthing. Identify any defective wiring or other mistakes made by non-certified electricians or DIY home-owners. Spot oversized fuses or breakers thatmay
THREE PHASE TRANSFORMER CONNECTIONS Three phase transformer connections Windings of a three phase transformer can be connected in various configurations as (i) star-star, (ii) delta-delta, (iii) star-delta, (iv) delta-star, (v) open delta and (vi) Scott connection. These configurations are explained below. Star-star (Y-Y) Star-star connection is generally used for small, high-voltage transformers. HOW UNDERGROUND CABLE LOCATOR WORKS? This article will explain the types of underground cable locators and how they work. Active Location: This method involves locating a specific line/cable by means of injecting specific frequency signal using a transmitter and the tracing it with a receiver. Passive Location: This method involves looking for unknown lines by detecting COOLING METHODS OF A TRANSFORMER No transformer is truly an 'ideal transformer' and hence each will incur some losses, most of which get converted into heat. If this heat is not dissipated properly, the excess temperature in transformer may cause serious problems like insulation failure. It is obvious that transformer needs a cooling system. Different cooling methods of transformers are - Air Natural , Air Blast, Oil Natural WHAT IS A TERMINAL BLOCK? A terminal block (also called as connection terminal or terminal connector) is a modular block with an insulated frame that secures two or more wires together. It consists of a clamping component and a conducting strip. A typical simplest terminal block is as shown in the image below. The insulating body of a terminal block houses a current SALIENT POLE ROTOR VS. NON-SALIENT POLE ROTOR In salient pole type of rotor consist of large number of projected poles (salient poles) mounted on a magnetic wheel.Construction of a salient pole rotor is as shown in the figure at left. The projected poles are made up from laminations of steel. The rotor winding is provided on these poles and it SUMPNER'S TEST OR BACK-TO-BACK TEST ON TRANSFORMER Sumpner's test or back to back test on transformer is another method for determining transformer efficiency, voltage regulation and heating under loaded conditions. Short circuit and open circuit tests on transformer can give us parameters of equivalent circuit of transformer, but they can not help us in finding the heating information. Sumpner's test give more accurate results of regulation TYPES OF CONDUCTORS USED IN OVERHEAD POWER LINES Therefore, aluminium is being widely used for overhead conductors. Cadmium-copper: Cadmium-copper alloys contain approximately 98 to 99% of copper and up to 1.5% of cadmium. Addition of about 1% of cadmium to copper increases the tensile strength by up to ELECTRICALEASY.COMELECTRICAL MACHINESPOWER SYSTEMASK A QUESTIONCONTACTWRITE FOR USMISCELLANEOUS The working of the inverter generator ensures the constant frequency. The engine runs the alternator to generate the AC electricity, which is converted to DC and then again AC.The whole process is controlled with the help of a microprocessor.. When the load is less, the microcontroller will reduce the speed of the engine, and so the noise is also reduced, while the frequency remains the same. HOW TO FIX A POWER INVERTER? It will help you get the new part in its place correctly. 6. Test the inverter. Once you have the new parts installed to the old faulty parts and shouldered on the places if necessary, now is the testing time. Connect the inverter to your battery and plug it in a controlled and limited power like a low voltage lamp. CHARACTERISTICS OF DC GENERATORS The above figure shows a typical no-load saturation curve or open circuit characteristics for all types of DC generators. 2. Internal or Total Characteristic (E/I a) An internal characteristic curve shows the relation between the on-load generated emf (Eg) and the armature current (I a).The on-load generated emf Eg is always less than E 0 due to the armature reaction. CAPACITANCE OF UNDERGROUND CABLES Hence capacitance of underground cables is much more than that of Overhead lines. The most important factor that is affected by this is the Ferranti effect. It is more pronounced in cables than in lines. This induces several limitations. Also, with increased capacitance,the
TROUBLE-SHOOTER’S GUIDE TO MOTOR OVERLOAD Use a clamp on the meter to check the amps when the motor is running to identify if there is an overload occurring. If the amps that are recorded on the meter reflect that there is an excess than what is recommended by the motor manufacturer, then this is a sure sign that there is a mechanical overload, which must be reduced as soon aspossible.
CHARACTERISTICS OF DC MOTORS Characteristics of DC motors. Generally, three characteristic curves are considered important for DC motors which are, (i) Torque vs. armature current, (ii) Speed vs. armature current and (iii) Speed vs. torque. These are explained below for each type of DC motor. These characteristics are determined by keeping the following two relationsin mind.
BASIC CONSTRUCTION AND WORKING OF A DC GENERATOR A dc generator is an electrical machine which converts mechanical energy into direct current electricity.Above figure shows the constructional details of a simple 4-pole DC generator. A DC generator consists two basic parts, stator and rotor. Basic constructional parts of a DC generator are described below. TYPES OF UNDERGROUND CABLES Classification based upon number of conductors in the cable. Single core cable. Three core cable. Typically, an Underground cable has either one, three or four cores. These cables are of course, constructed accordingly. Underground cables are usually employed to deliver 3 phase power. A 3 cored cable is preferred up to 66 kV. SYNCHRONOUS GENERATOR VS. INDUCTION Difference between synchronous generator and induction generator. In a synchronous generator, the waveform of generated voltage is synchronized with (directly corresponds to) the rotor speed. The frequency of output can be given as f = N * P / 120 Hz. where N is speed of the rotor in rpm and P is number of poles. SPEED CONTROL METHODS OF DC MOTOR Speed control of Shunt motor. 1. Flux control method. It is already explained above that the speed of a dc motor is inversely proportional to the flux per pole. Thus by decreasing the flux, speed can be increased and vice versa. To control the flux, a rheostat is added in series with the field winding, as shown in ELECTRICALEASY.COMELECTRICAL MACHINESPOWER SYSTEMASK A QUESTIONCONTACTWRITE FOR USMISCELLANEOUS The working of the inverter generator ensures the constant frequency. The engine runs the alternator to generate the AC electricity, which is converted to DC and then again AC.The whole process is controlled with the help of a microprocessor.. When the load is less, the microcontroller will reduce the speed of the engine, and so the noise is also reduced, while the frequency remains the same. HOW TO FIX A POWER INVERTER? It will help you get the new part in its place correctly. 6. Test the inverter. Once you have the new parts installed to the old faulty parts and shouldered on the places if necessary, now is the testing time. Connect the inverter to your battery and plug it in a controlled and limited power like a low voltage lamp. CHARACTERISTICS OF DC GENERATORS The above figure shows a typical no-load saturation curve or open circuit characteristics for all types of DC generators. 2. Internal or Total Characteristic (E/I a) An internal characteristic curve shows the relation between the on-load generated emf (Eg) and the armature current (I a).The on-load generated emf Eg is always less than E 0 due to the armature reaction. CAPACITANCE OF UNDERGROUND CABLES Hence capacitance of underground cables is much more than that of Overhead lines. The most important factor that is affected by this is the Ferranti effect. It is more pronounced in cables than in lines. This induces several limitations. Also, with increased capacitance,the
TROUBLE-SHOOTER’S GUIDE TO MOTOR OVERLOAD Use a clamp on the meter to check the amps when the motor is running to identify if there is an overload occurring. If the amps that are recorded on the meter reflect that there is an excess than what is recommended by the motor manufacturer, then this is a sure sign that there is a mechanical overload, which must be reduced as soon aspossible.
CHARACTERISTICS OF DC MOTORS Characteristics of DC motors. Generally, three characteristic curves are considered important for DC motors which are, (i) Torque vs. armature current, (ii) Speed vs. armature current and (iii) Speed vs. torque. These are explained below for each type of DC motor. These characteristics are determined by keeping the following two relationsin mind.
BASIC CONSTRUCTION AND WORKING OF A DC GENERATOR A dc generator is an electrical machine which converts mechanical energy into direct current electricity.Above figure shows the constructional details of a simple 4-pole DC generator. A DC generator consists two basic parts, stator and rotor. Basic constructional parts of a DC generator are described below. TYPES OF UNDERGROUND CABLES Classification based upon number of conductors in the cable. Single core cable. Three core cable. Typically, an Underground cable has either one, three or four cores. These cables are of course, constructed accordingly. Underground cables are usually employed to deliver 3 phase power. A 3 cored cable is preferred up to 66 kV. SYNCHRONOUS GENERATOR VS. INDUCTION Difference between synchronous generator and induction generator. In a synchronous generator, the waveform of generated voltage is synchronized with (directly corresponds to) the rotor speed. The frequency of output can be given as f = N * P / 120 Hz. where N is speed of the rotor in rpm and P is number of poles. SPEED CONTROL METHODS OF DC MOTOR Speed control of Shunt motor. 1. Flux control method. It is already explained above that the speed of a dc motor is inversely proportional to the flux per pole. Thus by decreasing the flux, speed can be increased and vice versa. To control the flux, a rheostat is added in series with the field winding, as shown inELECTRICALEASY.COM
The working of the inverter generator ensures the constant frequency. The engine runs the alternator to generate the AC electricity, which is converted to DC and then again AC.The whole process is controlled with the help of a microprocessor.. When the load is less, the microcontroller will reduce the speed of the engine, and so the noise is also reduced, while the frequency remains the same. CHARACTERISTICS OF DC GENERATORS The above figure shows a typical no-load saturation curve or open circuit characteristics for all types of DC generators. 2. Internal or Total Characteristic (E/I a) An internal characteristic curve shows the relation between the on-load generated emf (Eg) and the armature current (I a).The on-load generated emf Eg is always less than E 0 due to the armature reaction. ELECTRICAL SAFETY INSPECTION: IMPORTANCE AND CHECKLIST A proper electrical safety inspection will: Identify electrical wiring and components that may have degraded over time. Reveal if any electrical circuits are overloaded. Reveal if any lack of earthing. Identify any defective wiring or other mistakes made by non-certified electricians or DIY home-owners. Spot oversized fuses or breakers thatmay
THREE PHASE TRANSFORMER CONNECTIONS Three phase transformer connections Windings of a three phase transformer can be connected in various configurations as (i) star-star, (ii) delta-delta, (iii) star-delta, (iv) delta-star, (v) open delta and (vi) Scott connection. These configurations are explained below. Star-star (Y-Y) Star-star connection is generally used for small, high-voltage transformers. HOW UNDERGROUND CABLE LOCATOR WORKS? This article will explain the types of underground cable locators and how they work. Active Location: This method involves locating a specific line/cable by means of injecting specific frequency signal using a transmitter and the tracing it with a receiver. Passive Location: This method involves looking for unknown lines by detecting COOLING METHODS OF A TRANSFORMER No transformer is truly an 'ideal transformer' and hence each will incur some losses, most of which get converted into heat. If this heat is not dissipated properly, the excess temperature in transformer may cause serious problems like insulation failure. It is obvious that transformer needs a cooling system. Different cooling methods of transformers are - Air Natural , Air Blast, Oil Natural WHAT IS A TERMINAL BLOCK? A terminal block (also called as connection terminal or terminal connector) is a modular block with an insulated frame that secures two or more wires together. It consists of a clamping component and a conducting strip. A typical simplest terminal block is as shown in the image below. The insulating body of a terminal block houses a current SALIENT POLE ROTOR VS. NON-SALIENT POLE ROTOR In salient pole type of rotor consist of large number of projected poles (salient poles) mounted on a magnetic wheel.Construction of a salient pole rotor is as shown in the figure at left. The projected poles are made up from laminations of steel. The rotor winding is provided on these poles and it SUMPNER'S TEST OR BACK-TO-BACK TEST ON TRANSFORMER Sumpner's test or back to back test on transformer is another method for determining transformer efficiency, voltage regulation and heating under loaded conditions. Short circuit and open circuit tests on transformer can give us parameters of equivalent circuit of transformer, but they can not help us in finding the heating information. Sumpner's test give more accurate results of regulation TYPES OF CONDUCTORS USED IN OVERHEAD POWER LINES Therefore, aluminium is being widely used for overhead conductors. Cadmium-copper: Cadmium-copper alloys contain approximately 98 to 99% of copper and up to 1.5% of cadmium. Addition of about 1% of cadmium to copper increases the tensile strength by up to ELECTRICALEASY.COMELECTRICAL MACHINESPOWER SYSTEMASK A QUESTIONCONTACTWRITE FOR USMISCELLANEOUS The working of the inverter generator ensures the constant frequency. The engine runs the alternator to generate the AC electricity, which is converted to DC and then again AC.The whole process is controlled with the help of a microprocessor.. When the load is less, the microcontroller will reduce the speed of the engine, and so the noise is also reduced, while the frequency remains the same. THE ROLE OF AN ELECTRICAL ENGINEER IN THE CONSTRUCTIONSEE MORE ONELECTRICALEASY.COM
BASICS OF STEPPER MOTOR Basics of Stepper Motor. Stepper motor (also called as step motor) is basically a brushless DC motor, whose rotor rotates through a fixed angular step in response to input current pulse. That means, the full rotation of the rotor is divided into equal number of steps, CHARACTERISTICS OF DC GENERATORS The above figure shows a typical no-load saturation curve or open circuit characteristics for all types of DC generators. 2. Internal or Total Characteristic (E/I a) An internal characteristic curve shows the relation between the on-load generated emf (Eg) and the armature current (I a).The on-load generated emf Eg is always less than E 0 due to the armature reaction. HOW TO FIX A POWER INVERTER? It will help you get the new part in its place correctly. 6. Test the inverter. Once you have the new parts installed to the old faulty parts and shouldered on the places if necessary, now is the testing time. Connect the inverter to your battery and plug it in a controlled and limited power like a low voltage lamp. COOLING METHODS OF A TRANSFORMER No transformer is truly an 'ideal transformer' and hence each will incur some losses, most of which get converted into heat. If this heat is not dissipated properly, the excess temperature in transformer may cause serious problems like insulation failure. It is obvious that transformer needs a cooling system. Different cooling methods of transformers are - Air Natural , Air Blast, Oil Natural TROUBLE-SHOOTER’S GUIDE TO MOTOR OVERLOAD Use a clamp on the meter to check the amps when the motor is running to identify if there is an overload occurring. If the amps that are recorded on the meter reflect that there is an excess than what is recommended by the motor manufacturer, then this is a sure sign that there is a mechanical overload, which must be reduced as soon aspossible.
CORONA RINGS AND GRADING RINGS Corona rings are toroidal shaped metallic rings which are fixed at the end of bushings and insulator strings. They are also called as anti-corona rings.Corona rings are used to prevent corona discharge that occurs in high-voltage power lines.Corona discharge or corona loss is a significant issue with very high voltage power lines whichcauses power loss.
CAPACITANCE OF UNDERGROUND CABLES Hence capacitance of underground cables is much more than that of Overhead lines. The most important factor that is affected by this is the Ferranti effect. It is more pronounced in cables than in lines. This induces several limitations. Also, with increased capacitance,the
SYNCHRONOUS GENERATOR VS. INDUCTION Difference between synchronous generator and induction generator. In a synchronous generator, the waveform of generated voltage is synchronized with (directly corresponds to) the rotor speed. The frequency of output can be given as f = N * P / 120 Hz. where N is speed of the rotor in rpm and P is number of poles. ELECTRICALEASY.COMELECTRICAL MACHINESPOWER SYSTEMASK A QUESTIONCONTACTWRITE FOR USMISCELLANEOUS The working of the inverter generator ensures the constant frequency. The engine runs the alternator to generate the AC electricity, which is converted to DC and then again AC.The whole process is controlled with the help of a microprocessor.. When the load is less, the microcontroller will reduce the speed of the engine, and so the noise is also reduced, while the frequency remains the same. THE ROLE OF AN ELECTRICAL ENGINEER IN THE CONSTRUCTIONSEE MORE ONELECTRICALEASY.COM
BASICS OF STEPPER MOTOR Basics of Stepper Motor. Stepper motor (also called as step motor) is basically a brushless DC motor, whose rotor rotates through a fixed angular step in response to input current pulse. That means, the full rotation of the rotor is divided into equal number of steps, CHARACTERISTICS OF DC GENERATORS The above figure shows a typical no-load saturation curve or open circuit characteristics for all types of DC generators. 2. Internal or Total Characteristic (E/I a) An internal characteristic curve shows the relation between the on-load generated emf (Eg) and the armature current (I a).The on-load generated emf Eg is always less than E 0 due to the armature reaction. HOW TO FIX A POWER INVERTER? It will help you get the new part in its place correctly. 6. Test the inverter. Once you have the new parts installed to the old faulty parts and shouldered on the places if necessary, now is the testing time. Connect the inverter to your battery and plug it in a controlled and limited power like a low voltage lamp. COOLING METHODS OF A TRANSFORMER No transformer is truly an 'ideal transformer' and hence each will incur some losses, most of which get converted into heat. If this heat is not dissipated properly, the excess temperature in transformer may cause serious problems like insulation failure. It is obvious that transformer needs a cooling system. Different cooling methods of transformers are - Air Natural , Air Blast, Oil Natural TROUBLE-SHOOTER’S GUIDE TO MOTOR OVERLOAD Use a clamp on the meter to check the amps when the motor is running to identify if there is an overload occurring. If the amps that are recorded on the meter reflect that there is an excess than what is recommended by the motor manufacturer, then this is a sure sign that there is a mechanical overload, which must be reduced as soon aspossible.
CORONA RINGS AND GRADING RINGS Corona rings are toroidal shaped metallic rings which are fixed at the end of bushings and insulator strings. They are also called as anti-corona rings.Corona rings are used to prevent corona discharge that occurs in high-voltage power lines.Corona discharge or corona loss is a significant issue with very high voltage power lines whichcauses power loss.
CAPACITANCE OF UNDERGROUND CABLES Hence capacitance of underground cables is much more than that of Overhead lines. The most important factor that is affected by this is the Ferranti effect. It is more pronounced in cables than in lines. This induces several limitations. Also, with increased capacitance,the
SYNCHRONOUS GENERATOR VS. INDUCTION Difference between synchronous generator and induction generator. In a synchronous generator, the waveform of generated voltage is synchronized with (directly corresponds to) the rotor speed. The frequency of output can be given as f = N * P / 120 Hz. where N is speed of the rotor in rpm and P is number of poles. CHARACTERISTICS OF DC GENERATORS The above figure shows a typical no-load saturation curve or open circuit characteristics for all types of DC generators. 2. Internal or Total Characteristic (E/I a) An internal characteristic curve shows the relation between the on-load generated emf (Eg) and the armature current (I a).The on-load generated emf Eg is always less than E 0 due to the armature reaction. CORONA RINGS AND GRADING RINGS Corona rings are toroidal shaped metallic rings which are fixed at the end of bushings and insulator strings. They are also called as anti-corona rings.Corona rings are used to prevent corona discharge that occurs in high-voltage power lines.Corona discharge or corona loss is a significant issue with very high voltage power lines whichcauses power loss.
LOAD FREQUENCY CONTROL: WHY IS IT NEEDED? If the frequency decreases, it leads to an increase in flux that may result in saturation of the core. Thus, change in frequency leads to a lot of problems to the network. Hence, we adopt the method called the LOAD FREQUENCY CONTROL to maintain the frequency of the system at its rated value (as required by the Country’s Electricity Rules). HOW DO SOLAR PANELS WORK ON A VAN? The solar panel is a system that works to run the electronic device through its power system. It means this device has the capability to capture the heat or rays from the sun. And, then this heat is converted into energy for use on the device. This solar system helpsto
THREE PHASE TRANSFORMER CONNECTIONS Three phase transformer connections Windings of a three phase transformer can be connected in various configurations as (i) star-star, (ii) delta-delta, (iii) star-delta, (iv) delta-star, (v) open delta and (vi) Scott connection. These configurations are explained below. Star-star (Y-Y) Star-star connection is generally used for small, high-voltage transformers. SKIN EFFECT AND PROXIMITY EFFECT What is skin effect? When an Alternating Current flows through a conductor, it is not distributed uniformly throughout the conductor cross-section.AC current has a tendency to concentrate near the surface of the conductor. This phenomenon in alternating currents is called as the skin effect.Due to the skin effect, current is concentrated between the outer surface of the conductor and a level HOW UNDERGROUND CABLE LOCATOR WORKS? This article will explain the types of underground cable locators and how they work. Active Location: This method involves locating a specific line/cable by means of injecting specific frequency signal using a transmitter and the tracing it with a receiver. Passive Location: This method involves looking for unknown lines by detecting SPEED CONTROL METHODS OF DC MOTOR Speed control of Shunt motor. 1. Flux control method. It is already explained above that the speed of a dc motor is inversely proportional to the flux per pole. Thus by decreasing the flux, speed can be increased and vice versa. To control the flux, a rheostat is added in series with the field winding, as shown in SALIENT POLE ROTOR VS. NON-SALIENT POLE ROTOR In salient pole type of rotor consist of large number of projected poles (salient poles) mounted on a magnetic wheel.Construction of a salient pole rotor is as shown in the figure at left. The projected poles are made up from laminations of steel. The rotor winding is provided on these poles and it HVDC VS. HVAC TRANSMISSION Electrical power needs to be transmitted over longer distances from generating stations to electrical substations to be distributed to the consumers. Though DC transmission system was the first to born, soon it was replaced by AC transmission system.Earlier DC systems developed by the Edison's company could not transmit the power more than a couple of kilometers. ELECTRICALEASY.COMELECTRICAL MACHINESPOWER SYSTEMASK A QUESTIONCONTACTWRITE FOR USMISCELLANEOUS The working of the inverter generator ensures the constant frequency. The engine runs the alternator to generate the AC electricity, which is converted to DC and then again AC.The whole process is controlled with the help of a microprocessor.. When the load is less, the microcontroller will reduce the speed of the engine, and so the noise is also reduced, while the frequency remains the same. CHARACTERISTICS OF DC GENERATORS The above figure shows a typical no-load saturation curve or open circuit characteristics for all types of DC generators. 2. Internal or Total Characteristic (E/I a) An internal characteristic curve shows the relation between the on-load generated emf (Eg) and the armature current (I a).The on-load generated emf Eg is always less than E 0 due to the armature reaction. THE ROLE OF AN ELECTRICAL ENGINEER IN THE CONSTRUCTIONSEE MORE ON ELECTRICALEASY.COMJOURNAL OF ELECTRICAL ENGINEERINGROLE OF ENGINEERINGMANAGER
BASICS OF STEPPER MOTOR Basics of Stepper Motor. Stepper motor (also called as step motor) is basically a brushless DC motor, whose rotor rotates through a fixed angular step in response to input current pulse. That means, the full rotation of the rotor is divided into equal number of steps, SPEED CONTROL METHODS OF DC MOTOR Speed control of Shunt motor. 1. Flux control method. It is already explained above that the speed of a dc motor is inversely proportional to the flux per pole. Thus by decreasing the flux, speed can be increased and vice versa. To control the flux, a rheostat is added in series with the field winding, as shown in UNDERSTANDING THE POWER FACTOR Power Factor. Defined as ' the cosine of the angle between the voltage and current '. In AC circuit, the voltage and current are ideally in phase. But practically, there exists a phase difference between them. The cosine of this phase difference is termed as power factor. It can be defined and mathematically represented as follows: From the fig COOLING METHODS OF A TRANSFORMER No transformer is truly an 'ideal transformer' and hence each will incur some losses, most of which get converted into heat. If this heat is not dissipated properly, the excess temperature in transformer may cause serious problems like insulation failure. It is obvious that transformer needs a cooling system. Different cooling methods of transformers are - Air Natural , Air Blast, Oil Natural THREE PHASE TRANSFORMER CONNECTIONS CAPACITANCE OF UNDERGROUND CABLES Hence capacitance of underground cables is much more than that of Overhead lines. The most important factor that is affected by this is the Ferranti effect. It is more pronounced in cables than in lines. This induces several limitations. Also, with increased capacitance,the
TYPES OF UNDERGROUND CABLES Classification based upon number of conductors in the cable. Single core cable. Three core cable. Typically, an Underground cable has either one, three or four cores. These cables are of course, constructed accordingly. Underground cables are usually employed to deliver 3 phase power. A 3 cored cable is preferred up to 66 kV. ELECTRICALEASY.COMELECTRICAL MACHINESPOWER SYSTEMASK A QUESTIONCONTACTWRITE FOR USMISCELLANEOUS The working of the inverter generator ensures the constant frequency. The engine runs the alternator to generate the AC electricity, which is converted to DC and then again AC.The whole process is controlled with the help of a microprocessor.. When the load is less, the microcontroller will reduce the speed of the engine, and so the noise is also reduced, while the frequency remains the same. CHARACTERISTICS OF DC GENERATORS The above figure shows a typical no-load saturation curve or open circuit characteristics for all types of DC generators. 2. Internal or Total Characteristic (E/I a) An internal characteristic curve shows the relation between the on-load generated emf (Eg) and the armature current (I a).The on-load generated emf Eg is always less than E 0 due to the armature reaction. THE ROLE OF AN ELECTRICAL ENGINEER IN THE CONSTRUCTIONSEE MORE ON ELECTRICALEASY.COMJOURNAL OF ELECTRICAL ENGINEERINGROLE OF ENGINEERINGMANAGER
BASICS OF STEPPER MOTOR Basics of Stepper Motor. Stepper motor (also called as step motor) is basically a brushless DC motor, whose rotor rotates through a fixed angular step in response to input current pulse. That means, the full rotation of the rotor is divided into equal number of steps, SPEED CONTROL METHODS OF DC MOTOR Speed control of Shunt motor. 1. Flux control method. It is already explained above that the speed of a dc motor is inversely proportional to the flux per pole. Thus by decreasing the flux, speed can be increased and vice versa. To control the flux, a rheostat is added in series with the field winding, as shown in UNDERSTANDING THE POWER FACTOR Power Factor. Defined as ' the cosine of the angle between the voltage and current '. In AC circuit, the voltage and current are ideally in phase. But practically, there exists a phase difference between them. The cosine of this phase difference is termed as power factor. It can be defined and mathematically represented as follows: From the fig COOLING METHODS OF A TRANSFORMER No transformer is truly an 'ideal transformer' and hence each will incur some losses, most of which get converted into heat. If this heat is not dissipated properly, the excess temperature in transformer may cause serious problems like insulation failure. It is obvious that transformer needs a cooling system. Different cooling methods of transformers are - Air Natural , Air Blast, Oil Natural THREE PHASE TRANSFORMER CONNECTIONS CAPACITANCE OF UNDERGROUND CABLES Hence capacitance of underground cables is much more than that of Overhead lines. The most important factor that is affected by this is the Ferranti effect. It is more pronounced in cables than in lines. This induces several limitations. Also, with increased capacitance,the
TYPES OF UNDERGROUND CABLES Classification based upon number of conductors in the cable. Single core cable. Three core cable. Typically, an Underground cable has either one, three or four cores. These cables are of course, constructed accordingly. Underground cables are usually employed to deliver 3 phase power. A 3 cored cable is preferred up to 66 kV.ELECTRICALEASY.COM
The working of the inverter generator ensures the constant frequency. The engine runs the alternator to generate the AC electricity, which is converted to DC and then again AC.The whole process is controlled with the help of a microprocessor.. When the load is less, the microcontroller will reduce the speed of the engine, and so the noise is also reduced, while the frequency remains the same. DC POWER DISTRIBUTION SYSTEMS Unipolar DC distribution system (2-wire DC system) As the name suggests, this system uses two conductors, one is positive conductor and the other one is negative conductor. The energy is transmitted at only one voltage level to all the consumers using this system. A typical unipolar dc power distribution system is as shown in thefollowing figure.
THREE PHASE TRANSFORMER CONNECTIONS Three phase transformer connections Windings of a three phase transformer can be connected in various configurations as (i) star-star, (ii) delta-delta, (iii) star-delta, (iv) delta-star, (v) open delta and (vi) Scott connection. These configurations are explained below. Star-star (Y-Y) Star-star connection is generally used for small, high-voltage transformers. BASIC CONSTRUCTION AND WORKING OF A DC GENERATOR A dc generator is an electrical machine which converts mechanical energy into direct current electricity.Above figure shows the constructional details of a simple 4-pole DC generator. A DC generator consists two basic parts, stator and rotor. Basic constructional parts of a DC generator are described below. TROUBLE-SHOOTER’S GUIDE TO MOTOR OVERLOAD Use a clamp on the meter to check the amps when the motor is running to identify if there is an overload occurring. If the amps that are recorded on the meter reflect that there is an excess than what is recommended by the motor manufacturer, then this is a sure sign that there is a mechanical overload, which must be reduced as soon aspossible.
HOW UNDERGROUND CABLE LOCATOR WORKS? This article will explain the types of underground cable locators and how they work. Active Location: This method involves locating a specific line/cable by means of injecting specific frequency signal using a transmitter and the tracing it with a receiver. Passive Location: This method involves looking for unknown lines by detecting WHAT IS A TERMINAL BLOCK? A terminal block (also called as connection terminal or terminal connector) is a modular block with an insulated frame that secures two or more wires together. It consists of a clamping component and a conducting strip. A typical simplest terminal block is as shown in the image below. The insulating body of a terminal block houses a current TYPES OF UNDERGROUND CABLES Classification based upon number of conductors in the cable. Single core cable. Three core cable. Typically, an Underground cable has either one, three or four cores. These cables are of course, constructed accordingly. Underground cables are usually employed to deliver 3 phase power. A 3 cored cable is preferred up to 66 kV. SKIN EFFECT AND PROXIMITY EFFECT What is skin effect? When an Alternating Current flows through a conductor, it is not distributed uniformly throughout the conductor cross-section.AC current has a tendency to concentrate near the surface of the conductor. This phenomenon in alternating currents is called as the skin effect.Due to the skin effect, current is concentrated between the outer surface of the conductor and a level SYNCHRONOUS GENERATOR VS. INDUCTION Difference between synchronous generator and induction generator. In a synchronous generator, the waveform of generated voltage is synchronized with (directly corresponds to) the rotor speed. The frequency of output can be given as f = N * P / 120 Hz. where N is speed of the rotor in rpm and P is number of poles. ELECTRICALEASY.COMELECTRICAL MACHINESPOWER SYSTEMASK A QUESTIONCONTACTWRITE FOR USMISCELLANEOUS The working of the inverter generator ensures the constant frequency. The engine runs the alternator to generate the AC electricity, which is converted to DC and then again AC.The whole process is controlled with the help of a microprocessor.. When the load is less, the microcontroller will reduce the speed of the engine, and so the noise is also reduced, while the frequency remains the same. CHARACTERISTICS OF DC GENERATORS The above figure shows a typical no-load saturation curve or open circuit characteristics for all types of DC generators. 2. Internal or Total Characteristic (E/I a) An internal characteristic curve shows the relation between the on-load generated emf (Eg) and the armature current (I a).The on-load generated emf Eg is always less than E 0 due to the armature reaction. THE ROLE OF AN ELECTRICAL ENGINEER IN THE CONSTRUCTIONSEE MORE ON ELECTRICALEASY.COMJOURNAL OF ELECTRICAL ENGINEERINGROLE OF ENGINEERINGMANAGER
BASICS OF STEPPER MOTOR Basics of Stepper Motor. Stepper motor (also called as step motor) is basically a brushless DC motor, whose rotor rotates through a fixed angular step in response to input current pulse. That means, the full rotation of the rotor is divided into equal number of steps, SPEED CONTROL METHODS OF DC MOTOR Speed control of Shunt motor. 1. Flux control method. It is already explained above that the speed of a dc motor is inversely proportional to the flux per pole. Thus by decreasing the flux, speed can be increased and vice versa. To control the flux, a rheostat is added in series with the field winding, as shown in UNDERSTANDING THE POWER FACTOR Power Factor. Defined as ' the cosine of the angle between the voltage and current '. In AC circuit, the voltage and current are ideally in phase. But practically, there exists a phase difference between them. The cosine of this phase difference is termed as power factor. It can be defined and mathematically represented as follows: From the fig COOLING METHODS OF A TRANSFORMER No transformer is truly an 'ideal transformer' and hence each will incur some losses, most of which get converted into heat. If this heat is not dissipated properly, the excess temperature in transformer may cause serious problems like insulation failure. It is obvious that transformer needs a cooling system. Different cooling methods of transformers are - Air Natural , Air Blast, Oil Natural THREE PHASE TRANSFORMER CONNECTIONS CAPACITANCE OF UNDERGROUND CABLES Hence capacitance of underground cables is much more than that of Overhead lines. The most important factor that is affected by this is the Ferranti effect. It is more pronounced in cables than in lines. This induces several limitations. Also, with increased capacitance,the
TYPES OF UNDERGROUND CABLES Classification based upon number of conductors in the cable. Single core cable. Three core cable. Typically, an Underground cable has either one, three or four cores. These cables are of course, constructed accordingly. Underground cables are usually employed to deliver 3 phase power. A 3 cored cable is preferred up to 66 kV. ELECTRICALEASY.COMELECTRICAL MACHINESPOWER SYSTEMASK A QUESTIONCONTACTWRITE FOR USMISCELLANEOUS The working of the inverter generator ensures the constant frequency. The engine runs the alternator to generate the AC electricity, which is converted to DC and then again AC.The whole process is controlled with the help of a microprocessor.. When the load is less, the microcontroller will reduce the speed of the engine, and so the noise is also reduced, while the frequency remains the same. CHARACTERISTICS OF DC GENERATORS The above figure shows a typical no-load saturation curve or open circuit characteristics for all types of DC generators. 2. Internal or Total Characteristic (E/I a) An internal characteristic curve shows the relation between the on-load generated emf (Eg) and the armature current (I a).The on-load generated emf Eg is always less than E 0 due to the armature reaction. THE ROLE OF AN ELECTRICAL ENGINEER IN THE CONSTRUCTIONSEE MORE ON ELECTRICALEASY.COMJOURNAL OF ELECTRICAL ENGINEERINGROLE OF ENGINEERINGMANAGER
BASICS OF STEPPER MOTOR Basics of Stepper Motor. Stepper motor (also called as step motor) is basically a brushless DC motor, whose rotor rotates through a fixed angular step in response to input current pulse. That means, the full rotation of the rotor is divided into equal number of steps, SPEED CONTROL METHODS OF DC MOTOR Speed control of Shunt motor. 1. Flux control method. It is already explained above that the speed of a dc motor is inversely proportional to the flux per pole. Thus by decreasing the flux, speed can be increased and vice versa. To control the flux, a rheostat is added in series with the field winding, as shown in UNDERSTANDING THE POWER FACTOR Power Factor. Defined as ' the cosine of the angle between the voltage and current '. In AC circuit, the voltage and current are ideally in phase. But practically, there exists a phase difference between them. The cosine of this phase difference is termed as power factor. It can be defined and mathematically represented as follows: From the fig COOLING METHODS OF A TRANSFORMER No transformer is truly an 'ideal transformer' and hence each will incur some losses, most of which get converted into heat. If this heat is not dissipated properly, the excess temperature in transformer may cause serious problems like insulation failure. It is obvious that transformer needs a cooling system. Different cooling methods of transformers are - Air Natural , Air Blast, Oil Natural THREE PHASE TRANSFORMER CONNECTIONS CAPACITANCE OF UNDERGROUND CABLES Hence capacitance of underground cables is much more than that of Overhead lines. The most important factor that is affected by this is the Ferranti effect. It is more pronounced in cables than in lines. This induces several limitations. Also, with increased capacitance,the
TYPES OF UNDERGROUND CABLES Classification based upon number of conductors in the cable. Single core cable. Three core cable. Typically, an Underground cable has either one, three or four cores. These cables are of course, constructed accordingly. Underground cables are usually employed to deliver 3 phase power. A 3 cored cable is preferred up to 66 kV.ELECTRICALEASY.COM
The working of the inverter generator ensures the constant frequency. The engine runs the alternator to generate the AC electricity, which is converted to DC and then again AC.The whole process is controlled with the help of a microprocessor.. When the load is less, the microcontroller will reduce the speed of the engine, and so the noise is also reduced, while the frequency remains the same. DC POWER DISTRIBUTION SYSTEMS Unipolar DC distribution system (2-wire DC system) As the name suggests, this system uses two conductors, one is positive conductor and the other one is negative conductor. The energy is transmitted at only one voltage level to all the consumers using this system. A typical unipolar dc power distribution system is as shown in thefollowing figure.
THREE PHASE TRANSFORMER CONNECTIONS Three phase transformer connections Windings of a three phase transformer can be connected in various configurations as (i) star-star, (ii) delta-delta, (iii) star-delta, (iv) delta-star, (v) open delta and (vi) Scott connection. These configurations are explained below. Star-star (Y-Y) Star-star connection is generally used for small, high-voltage transformers. BASIC CONSTRUCTION AND WORKING OF A DC GENERATOR A dc generator is an electrical machine which converts mechanical energy into direct current electricity.Above figure shows the constructional details of a simple 4-pole DC generator. A DC generator consists two basic parts, stator and rotor. Basic constructional parts of a DC generator are described below. TROUBLE-SHOOTER’S GUIDE TO MOTOR OVERLOAD Use a clamp on the meter to check the amps when the motor is running to identify if there is an overload occurring. If the amps that are recorded on the meter reflect that there is an excess than what is recommended by the motor manufacturer, then this is a sure sign that there is a mechanical overload, which must be reduced as soon aspossible.
HOW UNDERGROUND CABLE LOCATOR WORKS? This article will explain the types of underground cable locators and how they work. Active Location: This method involves locating a specific line/cable by means of injecting specific frequency signal using a transmitter and the tracing it with a receiver. Passive Location: This method involves looking for unknown lines by detecting WHAT IS A TERMINAL BLOCK? A terminal block (also called as connection terminal or terminal connector) is a modular block with an insulated frame that secures two or more wires together. It consists of a clamping component and a conducting strip. A typical simplest terminal block is as shown in the image below. The insulating body of a terminal block houses a current TYPES OF UNDERGROUND CABLES Classification based upon number of conductors in the cable. Single core cable. Three core cable. Typically, an Underground cable has either one, three or four cores. These cables are of course, constructed accordingly. Underground cables are usually employed to deliver 3 phase power. A 3 cored cable is preferred up to 66 kV. SKIN EFFECT AND PROXIMITY EFFECT What is skin effect? When an Alternating Current flows through a conductor, it is not distributed uniformly throughout the conductor cross-section.AC current has a tendency to concentrate near the surface of the conductor. This phenomenon in alternating currents is called as the skin effect.Due to the skin effect, current is concentrated between the outer surface of the conductor and a level SYNCHRONOUS GENERATOR VS. INDUCTION Difference between synchronous generator and induction generator. In a synchronous generator, the waveform of generated voltage is synchronized with (directly corresponds to) the rotor speed. The frequency of output can be given as f = N * P / 120 Hz. where N is speed of the rotor in rpm and P is number of poles.* Follow:
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WHAT IS INVERTER GENERATOR? AND HOW IT IS DIFFERENT FROM CONVENTIONALGENERATOR?
by Kiran Daware AC Machines Many times you may have heard that the inverter generators are fuel-efficient and quieter than conventional generators. Have you wondered why is that so? Well, today we are going to answer all your queries regarding inverter generators, so keep reading. But before this you need to understand how alternator works. The alternator is almost the same as generator however there is one big difference. In alternator, the rotor is excited with... Read More... WHAT IS COMMUNITY SOLAR? - EVERYTHING YOU NEED TO KNOW by Kiran Daware Renewable Energy Community Solar Solar energy and especially community solar is something that we are starting to hear very often. If you are confused about what community solar is then let’s try to help you understand what it is. Consider a community garden, where anyone can come to grow vegetables, fruits or even flowers and plants. Basically, a shared local space that provides the people within the community organically produced food. Now just imagine... Read More... HOW DO SOLAR AND HYDROPOWER DRIVE ELECTRICITY? by Kiran Daware Power System Solar power and hydroelectric power have been under man’s use for a decade to produce electricity. With the growing need of time for smart production of electricity, these processes have become very reliable. Solar power is debatably the cleanest and the most dependable form of energy. As for the benefits of hydroelectric power, it drives 20% of the world’s energy requirements already. Below is the description of how both of these sources... Read More... INFORMATION ON SOLAR PHOTOVOLTAIC STREET LIGHTING SYSTEM & WORKINGPRINCIPLE
by Kiran Daware Miscellaneous Solar Photovoltaic street lighting system works on photovoltaic cells or batteries, that convert sunlight or solar energy into electricity. If you come across a solar lighting system, note the dark panel on top of the light. That is the panel of the photovoltaic cells, which will convert sunlight into electricity. This electricity will then be stored in the batteries. This power can be used as and when needed. The batteries being connected... Read More... ELECTRICAL SAFETY INSPECTION: IMPORTANCE AND CHECKLIST by Kiran Daware Miscellaneous No one hesitates to call an electrician whenever a fault is seen. However, most people will take their electrical wiring safety for granted. Importance of home electrical safety inspection All electrical installations/wiring will deteriorate with age and use. However, most home owners often overlook the wiring condition. At the most, an electrical safety inspection will only be called when a breaker has already been tripped or a fuse... Read More...Page 1 of 2712327»
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* Working of induction motors * 3 phase induction motor * Starting of 3 phase IM * Speed control of IM * Induction generator * Synchronous generator* More...
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