Parallel Operation Of Alternators Pdf





Parallel Operation Of Alternators. com Distributed by: EXTEND-A-TROLL CUSTOMER INFORMATION About Your Charger Controller Your MBCM-24 charger senses when your main engine alternator is charging, measures the starting battery voltag e. The incoming generator voltage is almost equal to the bus bar voltage. The purpose of this article is to explain how motors affect genset performance and how sizing software, such as Kohler Power System’s QuickSize ™, deals with motor loads. This app covers entire aspects of the subject, from basic engineering to advanced and modern topics related to Electrical Engineering and Technology. Should the governor speed reference be less than the utility frequency, power in the utility bus will flow to the alternator and motor the unit. MAGNETIC FIELD MAGNETIC FIELD SYSTEMS METHOD OF STATEMENT FOR TRANSFORMER STABILITY TEST METHODS OF REDUCING CORONA EFFECT MULTIPLY-EXCITED MULTIPLY-EXCITED MAGNETIC FIELD SYSTEMS Mesh Current Mesh Current-1 Moving Iron Instruments Multiplexing Network Theorems Node Voltage Method On-No Load And On Load Condition PLC PORT EXTENDER POTIER & ASA. Voltage regulators find their applications in computers, alternators, power generator plants where the circuit is used to control the output of the plant. ‏In this system tripping is generally delayed for discrimination purposes. AGN 045 - Alternators for Parallel Operation MAINS GRID SYSTEMS - SUPPLY NETWORKS Over the last fifteen years or so, market trends, often encouraged by government policies, have created a proliferation of privately owned generating plants connected to the Mains Grid System - Supply Network. Operating Dissimilar Alternators in Parallel Although it is a relatively uncommon occurrence, every so often the question arises as to the feasibility of adding new generation equipment to an existing generator or generator system. The alternators are connected in parallel to each other only if the required conditions are satisfied. 13-5 Parallel operation of alternators. An alternator has three main components, each playing a specific role to keep the car's battery fully charged. The output of the alternator section supplies alternating voltage to the load. Four 12-volt batteries are. Type of operation (e. The main parts of a generators are: carbon brushes, slip-rings, rotor and stator. Most alternators use a rotating magnetic field with stationary armature The alternator works with the battery to generate power for the electrical components of a vehicle, like the interior and exterior lights, and the instrument panel. com Distributed by: FEATURES v Charges 12V house battery bank from up to two separate engine alternators. Table of contents: part-i: dc machines magnetic circuits and induction principles of electromechanical energy conversion basic concepts of rotating electrical machines construction of dc machines armature reaction and commutation in dc machines operating characteristics and application of dc generators parallel operation of dc generators operating characteristics and applications of dc motors. PARALLEL OPERATION OF ALTERNATORS Citharthan D Assistant Professor Christ the King Engineering College Coimbatore, India 2. this leads to an alternator power increase of max. We can not control the load(KW or MW) and power factor but the terminal voltage and frequency can be controlled. Individual learner activities: investigate operation of three-phase supply systems. Parallel operation of alternators Published in: Journal of the Institution of Electrical Engineers ( Volume: 42 , Issue: 195 , June 1909) Article #: Page(s. starting methods of synchronous motors. Heavy Duty Diagnostics Procedures Data 5-3 CONTENTS new diagnostic manual 4/5/05 9:47 AM Page v. Alternators provide power to a vehicle’s electrical system and charge its battery. Most utility systems which supply service for commercial and industrial systems are solidly grounded. Describe the purpose and function of single and three phase alternators. The first step of understanding paralleling, is to understand the basic generator control functions. LEROY-SOMER Installation and maintenance 3742 en - 2011. All STAMFORD alternators and some AvK alternators are wound with a 2/3rd winding pitch with minimal triplen harmonics. An AC generator (alternator) is based on the rotation of a magnet inside a fixed-loop conductor. We will go on adding questions, till we reach 100 and may be we will add more than 100. alternators in parallel: 1. • B is the alternator output wire that supplies current to the battery. ADVANTAGES OF PARALLEL OPERATION OF ALTERNATOR OR GENERATORS Advantages of Parallel Operation of Alternator or Generators. Lesson 21: Alternator Capabilities and Parallel Operation PPT. Two identical alternators having impedances Z 1 and Z 2 are connected in parallel produces E 1 and E 2 as their induced emf's. Go to Parallel Operation of Generator Sets for benefits and details on of operating generators in parallel. The parallel operation and load sharing between two alternators are possible because of alternator internal reactance which limits the short circuit current and allows angular displacement between two stations. Through electromagnetic induction,. Here two open-delta transformers are used. Alternator Manfacturers and Alternator Suppliers worldwide. Synchronous operation of two or more generator sets connected together Alternator Shaft Position (Degrees) One Wave Cycle Deg v. When a large number of alternators or synchronous generators are connected in parallel to an infinite bus bar system having a constant terminal voltage, constant bus bar frequency and very small synchronous impedance, then this kind of connection is known as parallel operation of alternators. Unit-4: SYNCHRONOUS MOTORS,Principle of operation,Methods of starting synchronous motor,Behaviour of a synchronous motor,Equivalent circuit model and phasor diagram. Test alternator operation. txt) or view presentation slides online. Alternators with capacities in the order of 200,000 kVA may have efficiency ratings as high as 96% at the full-load output. An AC motor has two basic electrical parts: a "stator" and a "rotor" as shown in Figure 8. In short two transformers are said to bein in parallel if their primary winding is connected to the common supply and both secondary windings connected to the load. 471] Power plants whether in DC or AC station, will be generally found to have several smaller generators running in parallel rather than large single units capable of supplying the maximum peak load. When the demand of power increases, new alternators can be installed to operate in parallel. Group Charging on Voltage-Limited or Parallel Chargers 5-2 5-5. Specifications: Features: • Lightweight, easy to carry design – Compact lightweight alternator reduces weight to 27. Parallel Operation of Alternators Synchronizing of Alternators Alternators Connected to Infinite Bus-bars Synchronizing Torque Tsy Alternative Expression for Synchronizing Power Effect of Unequal Voltages Distribution of Load Maximum Power Output Questions and Answers on Alternators Learning Objectives. ELECTRICAL SYSTEMS 1 HEAVY-DUTY ELECTRICAL SYSTEMS BASICS Todays basic heavy-duty electrical system consists of batteries, a starting motor, an alternator, and the control circuit. Adjust the Volts Setting or Adjust the Alternator Voltage to make sure the No load voltage of each alternator is the same value, within 1 or 2 volts. A field current of 70A produces a short – circuit current equal to fuel load current of 376A in each line. DELCO AD Series Alternators The purpose of this modification is to allow the MOBI-ARC’s PWM regulator to control the alternator. The newer designs of alternators can produce a lot more current at low RPM, even when the gross output rating is nearly the same with the old model. 6 Turbo Alternator Switchboard 33 2. The prime-mover of an alternator is rotating at a constant power basis, i. Download Area. Re: How to Adjust Power Factor When Two Generators Are Running Parallel 06/26/2013 2:06 PM You haven't told us if you're operating in "Island" or "Grid connected" mode, the size of the machines, and the nature of the load. One circuit is the external load, and the other is the local internal circuit, i. (ii) Phase sequence of each alternator should. Modern ¥ long life operation DESIGN The alternator is a three-phase, 12-pole. 4 - Connection checks Electrical installations must comply with The machine can only be started up and the current legislation in force in the used if the installation is in accordance country of use. Introduction to Alternators and Principles. Parallel operation of alternators 1 1. Individual learner activities: investigate operation of three-phase supply systems. An alternator gets its name from the term alternating current (AC) 3. Synchronising of Alternators 3. a) Couple the dc motor to the alternator with the timing belt. An analytical thermal model for Lun- dell alternators is proposed, and. current during parallel operation of two starters) 50d Input at starting relay for starter I (Starting relay for sequential control of the engagement current during parallel operation of two starters) 50e Input, Start-locking relay 50f Output, Start-locking relay 50g Input, Start-repeating relay 50h Output, Start-repeating relay ----- ALTERNATOR. However, the new Digital High Performance model is good for at least 24 volt 300 amp by itself if required. Alternator Voltage Regulator. The incoming generator frequency is equal to or slightly higher than the bus bar frequency. • S is used by the regulator to monitor charging voltage at the battery. Perrone2 and J. system grounding is the ratio of the available ground-fault current to the available three-phase fault current. Shunt generators are most suited for stable parallel operation because of their (a) rising voltage characteristics (b) identical voltage characteristics (c) drooping voltage characteristics (d) linear voltage characteristics Ans: c 123. An alternator that uses a permanent magnet for its magnetic field is called a magneto. 2 - 4 POLES ALTERNATORS 3. A 3-phase, 1500 kvA, star-connected, 50-Hz, 2300v alternator has a resistance of 0. alternating current (AC) generators. even in the failure or out off service of one transformer half of the bus load can be driven using signal transformer in emergency cases. Discuss the operation of a stepping motor. Alternator - Principle – Construction – Types. In this section of the web site you will be able to find all the information of technical character relative to our products. Introduction to Alternators and Principles. In order to facilitate the search, the contents have been subdivided in categories and each category will introduce more files that you will be able to download on your computer. The proposed system captures important characteristics of alternator that include excitation of alternator as well as voltage control method. Figure (ii) shows the wrong method of connecting two single-phase transformers in parallel. Parallel Generators With Load Management in Controller Parallel Generators With Load Management in Switchgear Key: Motor-Operated B reake Generator Controller Control Paralleling Switchgear Parallel Generators with Load Management System (LMS) Parallel Generators with Building Management System (BMS) C Ge M Gen C M M M M M M M M C C C Gen C r. Power Systems: Basic power generation concepts; transmission line models and. A voltage regulator provides this constant DC output voltage and contains circuitry that continuously holds the output voltage at the design value regardless of changes in load current or input voltage (this assumes that the load current and input voltage are within the specified operating range for the part). regulation and parallel operation of generators, motor starting, characteristics and applications. its power and speed remain constant, now if you make variations in the exciting coils, then the output power from the alternator will vary in accordance. To enable parallel operation between machines, and in. 1288 ˜ fax 916. (b) voltage rating. It is always difficult to meet the extra load demand by a single generator, or it is not possible to give supply when one generator is out of order. the alternator can be overhauled periodically, so life is more. DG Set System Bureau of Energy Efficiency 170 Capacity Combinations From the point of view of space, operation, maintenance and initial capital investment, it is certainly economical to go in for one large DG set than two or more DG sets in parallel. Procedure. general test on alternator, Emf equation of the alternator, Characteristic and voltage regulation of the alternator, Parallel operation and synchronisation of three phase alternators, Synchroscope method, Brushless alternator, Synchronous motor, MG set and rotary converter and inverter. • S is used by the regulator to monitor charging voltage at the battery. field winding on the rotor. The case must withstand extreme vibration, temperature change, and the corrosive action of the electrolyte. GENERATOR 280-430 Frame Installation, Operation, and Maintenance Manual Marathon Electric Mfg. > Consider modifying system sequence of operation. Effect of Increasing the Driving Torque 9. characteristics and limitations, single-phase and polyphase alternators, controls, regulation, and parallel operation. Furthermore it can absorb power (active and reactive) and can provide power (active and reactive) as needed. ) The process of connecting an alternator in parallel with another alternator or with common bus-bar is called synchronizing. Following conditions to be satisfied during the parallel operation of transformers Same polarities should be connected. the alternators can be run in parallel according to the requirement of the load. Inventors: Download PDF 3185857 PDF help. Parallel operation of alternators with dissimilar winding pitches can result in circulating currents. Describe the purpose and function of single and three phase alternators. a period of 1 hour within a 12-hour period of operation. The on and off of any of the alternator will not affect the working of the power system. The conditions to checked for synchronization of alternator are given below:-. which will improve your skill. For parallel operation of alternators on same busbars, it is necessary to have voltage regulators with feedback of lagging current to cause voltage "droop" proportional to lagging current [usually about 3% droop for rated current lagging] or interconnection of AVRs to provide a reactive load-sharing feedback. The parallel configuration of several units will provide you over 100 amperes. Voltage regulators find their applications in computers, alternators, power generator plants where the circuit is used to control the output of the plant. Kamble4 1,2,3,4Department of Electrical Engineering 1,2,3,4AISSMS's IOIT, Pune, India. This results in a marked increase in the efficiency. effects on generated voltage of variations in load. This will restore the magnetism in the rotor and the alternator will begin operating correctly. field winding on the rotor. View and Download PowerPoint Presentations on For Parallel Operation Of Alternator PPT. The meaning of the term “Alternators” is defined in each settlement agreement, but generally includes electromechanical devices that generate an electric current while an engine is in operation. The Mac Plus provides constant power to the service battery, even when the alternator is inactive. ALTERNATOR Mechanical energy is transferred from the engine to the alternator by a grooved drive belt on a pulley arrangement. KVAR Control of Parallel Synchronous Generators: For the given total load and equal sharing of real load, let the excitation of G 1 be now increased and that of G 2 simultaneously reduced in such a manner as to keep the terminal voltage unchanged. Continuous Operation 11. List and describe the functional and economic limitations of "Traditional" generator paralleling. the alternator can be overhauled periodically, so life is more. (ii) Phase sequence of each alternator should. parallel operation of ac generators In most generator applications, there is more than one generator operating in parallel to supply power to various loads. T9 Alternators and generators encompassing: effects on the generated voltage of variations in excitation. This app covers entire aspects of the subject, from basic engineering to advanced and modern topics related to Electrical Engineering and Technology. An AC generator (alternator) is based on the rotation of a magnet inside a fixed-loop conductor. Let us see how the effect of distributed and short pitch type of winding on the emf equation of Synchronous Generator or Alternator. advantages gained by the parallel operation of alternators. 232 ratings • 28 reviews. Click to expand I am running a 10SI alternator, and have a 1amp 400volt diode that will be going in line, so I guess my little LED light will be fine if it's not needed to excite the alternator. Walantus 2, H. Stamford Newage alternators are well known for their enhanced performance and rugged reliability. Gen Parallel Operation - Free download as Powerpoint Presentation (. In the droop speed control mode the speed will decrease by a fixed percentage when the generator is loaded from no-load to full load. PRINCIPLES OF OPERATION OF SYNCHRONOUS MACHINES The synchronous electrical generator (also called alternator) belongs to the family of electric rotating machines. We can not control the load(KW or MW) and power factor but the terminal voltage and frequency can be controlled. pptx LEARNING OBJECTIVES Lesson 20_et332b. 12 volt 12 volt 12 volt 12 volt 12 volt Shown here are three additional. (ii) Frequency of EMF generated should be equal. In Electrical Machine Lab - 2, one number of code EE-592 are performed. The rotor is an electromagnet made by coiling wires around two or more poles of metal core. Parallel Operation of Two Alternators - MCQs with answers Q1. Internal generated voltage of a synchronous generator The magnitude of internal generated voltage induced in a given stator is E N f AC 2 K where K is a constant representing the construction of the machine, is flux in it. A field current of 70A produces a short – circuit current equal to fuel load current of 376A in each line. 625 leading (C) 0. phase sequence 3. com Generator Design and Operation The design of the rotary piston generator is well adapted for use in vehicles, robots, unmanned. 65 Viva - voce Questions. With the generator running only a few RPM above synchronous speed, the cycle time for the bulbs to lighten and darken should be five to ten seconds. Rotor BlockedRotor FreeLoad is osborne an introduction to game theory pdf download. 8 Volts, the connected relay will open separating the batteries. It's 11:45 p. Acquaintance with the generator nameplate data and circuit assembling. Study of Power (Load) sharing between two Three Phase alternators in parallel operation condition 7. 1288 ˜ fax 916. Putting alternators in parallel is generally a bad idea, because unless you can get the output voltages identical, one of the alternators will supply most or all of the power. docx 2 Course Description and Prerequisites This course introduces the theory and operation of DC and AC machines with an emphasis on the testing and measurement of machine characteristics and parameters. 232 ratings • 28 reviews. This is economical and improves the efficiency of the generating station. Type of operation (e. The stator is in the stationary electrical component. This ac is removed from the loop by means of slip rings and applied to an external load. The hatched links that connect the alternator (generator), battery pack, electric motor and the electronic interface represents the electric ßow in the system whereas the non-hatched links represents. GENERATOR 280-430 Frame Installation, Operation, and Maintenance Manual Marathon Electric Mfg. Explain in brief of the following : (i) Merz-price system of protection (ii) Short-circuit current for symmetrical faults (iii) Electric welding How is the rating of a cable determined ? What are the different configurations Of BJT ? Explain each with suitable circuit diagram. With air-cooled alternators, the cooling output is a function of speed, which results in. AUTOMOTIVE ELECTRICAL CIRCUITS AND WIRING 7/ 101. reactive current will produce a voltage that adds to the voltage from the alternator output; ie the CT acts to reduce VAr output by increasing the signal fed into the AVR. For two or more generators to operate in parallel, the following conditions usually must be met and maintained:. com Distributed by: FEATURES v Charges 12V house battery bank from up to two separate engine alternators. For Parallel operation The AS440 AVR also incorporates circuits which, when used in conjunction with accessories, can provide for parallel operation with 'droop' control. The operation of connecting an alternator in parallel with another alternator or with common busbars is known as synchronizing. Presentation Summary : ET 332b. 65 Viva - voce Questions. Since the bus chassis alternator is 24 volts, and since the batteries are wired to provide both 12 and 24 volts there must be a means of insuring the batteries are charged in such a way as to insure a 12 volt load will not pull down some of the batteries in the set and not others. Models not specifically designed for Dual (parallel) operation should only be used as a single alternator. Lesson 21: Alternator Capabilities and Parallel Operation PPT. The main parts of a generators are: carbon brushes, slip-rings, rotor and stator. Batteries In Parallel To increase the total amperage available while maintaining the same voltage, you would place 2 or more batteries in parallel, as shown below. Here are some Best Recommended Electrical Machines Books. FUNCTIONS OF ALTERNATOR COMPONENTS A typical rotating-field ac generator consists of an alternator and a smaller dc generator built into a single unit. download 1 file. specifically for parallel operation with another EU2200i or EU2000i. 655997) and ES-7024-14 (CMI P/N 657199) alternators. It is possible to handle load growth by adding alternators without disturbing the original installation. , the lightest in its class. The prime-mover of an alternator is rotating at a constant power basis, i. An alternator that uses a permanent magnet for its magnetic field is called a magneto. specifi cations. 3 Overcurrent 224 4. • B is the alternator output wire that supplies current to the battery. It does however adjust the internal power factor at which a particular machine operates. Alternators Parallel Operation of Alternators [3/21. In order to put a generator onto a live bus bar or in other words, for the parallel operation generators in ships, the following conditions must be fulfilled. single phase synchronous motor pdf. Alternators generate a high level of current even at low speeds. 9 hr at 1/4 Rated Load Noise Level 47 – 57 dBA Limited Warranty 3 year limited warranty* *Except commercial/rental use, 2 year Limited Warranty. 2 The six-phase PM alternator The alternator that will be used for excitation is a six-phased permanent magnet machine. Alternators in power stations driven by steam turbines are called turbo-alternators. Pratap, “Comparison of a single pulsed alternator with two or more in parallel for driving a railgun,” IEEE Transactions on Magnetics, vol. The Electrical Machines 3 Notes pdf - EM III Notes Pdf book starts with the topics covering Constructional Features of round rotor and salient pole machines, suppression of harmonics, Regulation by synchronous impedance method, Parallel Operation of Synchronous Generator Synchronizing alternators with infinite bus bars, Theory of operation. Synchronisation is carried out in order to parallel a Generator onto a live Bus-bar, either in Island mode ( with multiple Generator sets as the only supply), or to the Utility. SEMI-SOLID LINK SOLENOID INSTALLATION INSTRUCTIONS 37MT, 41MT and 42MT STARTERS 12V and 24V. Ac Electric Machines and Power Systems Spring 2016 et332b16. The speed of the incoming alternator must be such that its frequency equals to the bus-bar frequency. com Distributed by: EXTEND-A-TROLL CUSTOMER INFORMATION About Your Charger Controller Your MBCM-24 charger senses when your main engine alternator is charging, measures the starting battery voltag e. Synchronising Current 4. undercharged batteries resulting from poor load balance. 8 kw 220 v 40 A load is 5. Note that all AVRs help regulating the output in a steady state operation, but are generally slow to respond to fast transient loads. An AC motor has two basic electrical parts: a "stator" and a "rotor" as shown in Figure 8. Alternator Manfacturers and Alternator Suppliers worldwide. > Consider modifying system sequence of operation. Parallel kit sold separately. Charging System Operation 149 Figure 8-3. However, the new Digital High Performance model is good for at least 24 volt 300 amp by itself if required. starting methods of synchronous motors. To enable parallel operation between machines, and in. It also replenishes the energy which is used to start the vehicle. 2 ALTERNATOR 6. 03/ g LSA 47. Design and Fabrication of Synchronizing Panel for Parallel Operation of Alternators Udayraj Patil1 Mayuri More2 Vaibhav Magar3 Mr. Alternator Explanation of alternator, types of prime mover, efficiency, regulations, phase sequence, Parallel operation. 11 Regulation of Alternator by EMF and MMF Method. a period of 1 hour within a 12-hour period of operation. Here the two secondaries are so connected that their e. Alternator Operation The rotor winding is energized from the DC exciter and alternate N and S poles are developed on the rotor. This current is given by a. Provides manual adjustment capability for time delay start, stop, transfer and retransfer, as well as time delays for program transition (when used) and power transfer overlap time. By Daniel Cleveland Faber and Herbert Edward Kahlert. 471] Power plants whether in DC or AC station, will be generally found to have several smaller generators running in parallel rather than large single units capable of supplying the maximum peak load. Book Overview. Infinite Bus Definition: The bus whose voltage and frequency remains constant even after the variation in the load is known as the infinite bus. Under Voltage Protection. Describe the construction of alternators. Sudden Short Circuit of a Synchronous Generator, Transient and Subtransient reactance- s. what are different types of alternator and discuss about the methods of cooling. Since apprentices are likely to be required to parallel alternators driven by dc motors sometime in their instruction, the following steps outline the procedure for paralleling these machines. They are available in a single phase voltage of 120 VAC. Power Plant VS: This model’s automatic operation is the same as the VoltSeeker, with one difference. Type of operation (e. (c) kVA rating. US Patent References: 2986647: Regulator control apparatus for plural generators: 1961-05-30: 2972058. synchronous impedance of the two alternators. Selection between either of two batteries or banks of batteries, operation of both batteries or banks of batteries in parallel, or complete disconnect of both batteries or banks of batteries. This is called synchronization of alternator. Here are some Best Recommended Electrical Machines Books. • IG is the ignition input that turns on the alternator/regulator assembly. It consists of a group of individual electro-magnets arranged in such a way that they form a hollow cylinder, with one pole of each magnet facing toward the center of the group. This condition, the machine is said to be overexcited,. Parallel Operation of Alternator The alternators are operated parallelly to supply power to meet large load demand. the alternator can be overhauled periodically, so life is more. (ii) Frequency of EMF generated should be equal. Internal control functions General functions System control voltage - The control operates on 24. If alternator or AC Generator is Star Connected as usually the case, then the Line Voltage is √3 times the phase voltage. Intheinvestigationof"TheParallelOperationofDistant Alternators", ithasbeentheaimoftheauthorsofthisthesisto. generator b. LESSON 20 ALTERNATOR OPERATION OF SYNCHRONOUS MACHINES ET 332b Ac Motors, Generators and Power Systems 1 Lesson 20_et332b. Synchronous operation of two or more generator sets connected together Alternator Shaft Position (Degrees) One Wave Cycle Deg v. Standby Power Rating (ESP): The standby power rating is applicable for supplying emergency power for the duration of a utility power interruption. 2 - 4 POLES ALTERNATORS 3. Describe the procedures for operating single and parallel units. The magnetic field is. , the lightest in its class. The reliability is increased with parallel operation than to have…. 1-3, built into Series-Parallel 3. Q:What happens in all dark lamp method ? If frequency and phase difference of incoming alternator and busbar are not same then lamps connected across incoming alternator will flicker. The PMG provides power via the AVR to the main exciter, giving a source of constant excitation power independent of generator output. Two or more DG sets running in parallel can be a advantage as only the short-fall in. A built in rectifier converts the electrical output to DC, ready to connect to a battery. We have planned to give you 100 Interview Questions on Power Transformer. Parallel with a Utility. For specific data contact Marathon Electric. (DaimlerChrysler Corporation) battery produces about 2. This app covers entire aspects of the subject, from basic engineering to advanced and modern topics related to Electrical Engineering and Technology. Alternators: Construction, Operation, EMF equation, regulation, testing and parallel operation. The incoming generator voltage is almost equal to the bus bar voltage. Controlling circulating currents when paralleling generators in a power system that shares a common neutral can be difficult. When the alternator is operating normally, any number of batteries can be hard connected to the bus. Fail-safe common control of multiple alternators electrically connected in tandem parallel for producing high current CA 2262878 CA2262878A1 (en) 1996-07-15: 1997-07-14: Fail-safe common control of multiple alternators connected in tandem parallel PCT/IB1997/001039 WO1998002961A1 (en) 1996-07-15. E 2 - E 1 / Z 1 + Z 2. The working principle of an alternator is very simple. Connecting a group of alternators parallel to a bus bar and the alternators should have same voltage and frequency as that of bus-bar. The parallel operation of distant alternators. Parallel operation of alternators Published in: Journal of the Institution of Electrical Engineers ( Volume: 42 , Issue: 195 , June 1909) Article #: Page(s. Stator It is the stationary part of the machine and is built up of silicon steel laminations having slots on its inner periphery. a) Couple the dc motor to the alternator with the timing belt. So don't be surprised to find your alternator going bad or the system developing problems after a few years of trouble-free operation, even if you have maintained your car well. Parallel operation of alternators with dissimilar winding pitches can result in circulating currents. MULTIPLE BATTERY CHARGING MODULE (FOR MARINE APPLICATIONS) MBCM-12 ATKINSON ELECTRONICS, INC. Load test on a wound rotor Induction Motor and deriving its performance characteristic. 13 Download PDF Download Citation View References Email Request Permissions. (DaimlerChrysler Corporation) battery produces about 2. Some high-end models, such as Honda EB10000 use more accurate digital DAVR. For parallel operation of alternators on same busbars, it is necessary to have voltage regulators with feedback of lagging current to cause voltage "droop" proportional to lagging current [usually about 3% droop for rated current lagging] or interconnection of AVRs to provide a reactive load-sharing feedback. 4 The alternator shall work in conjunction with rectifier-cum-regulator unit. Controlling Speed, Phase and Voltage Voltage Sensor + +-Speed -Parallel with each other -Synchronize with the grid (single genset) - Base Load/Peak Shave. docx 2 Course Description and Prerequisites This course introduces the theory and operation of DC and AC machines with an emphasis on the testing and measurement of machine characteristics and parameters. If two segments of a grid are disconnected, they cannot exchange AC power again until they are brought back. I thought I had a defective alternator tachometer interface or an alternator that did not deliver a clean stator signal. battery is charged with the combined charge of both alternators. Page 9 Alternator Operating Areas WARNING Flying debris In the event of catastrophic failure, debris may be ejected from the alternator air inlet/outlet and may cause severe injury or death. Three lamps (each of which is rated for alternator terminal voltage) are connected across the switches of the alternator-2. In alternators, the distribution factor is defined as the ratio of emfs of. This line of generator ends is recognized for their quality and versatility around the world. Normally, two or more generators are operated in parallel in order to increase the available power. Electrical Machines is one of the most important chapter in electrical engineering. Synchronization of alternator means connecting an alternator into grid in parallel with many other alternators, that is in a live system of constant voltage and constant frequency. 1 Construction of Alternator Synchronous machine is consists of two parts, one is stator and another is rotor. Kamble4 1,2,3,4Department of Electrical Engineering 1,2,3,4AISSMS's IOIT, Pune, India. A paper on the parallel operation of alternators would hardly be complete without some discussion of the methods and apparatus used for throwing alternators in parallel. machines Slot structure in a. Machines-I, Indore Univ. The incoming machine must have its voltage and frequency equal to that of the bus bars and, should be in same phase with bus bar voltage. The incoming generator frequency is equal to or slightly higher than the bus bar frequency. The alternator is controlled by the pilot through the alternator master switch. Get Answer B 47. BATTERY CASE, COYER, AND CAPS. In parallel to the electrical system, with the air compressor at marginal. Will disturb generated e. Synchronising of Alternators 3. Connecting a group of alternators parallel to a bus bar and the alternators should have same voltage and frequency as that of bus-bar. The continuity of service is one of the important requirements of any electrical apparatus. Requirements for Successful Parallel Operation 2. Parallel Operation of Alternators • Synchronizing – it is the operation of connecting an alternator in parallel with another alternator or with common bus-bar. Small wind turbines need low speed alternators. 1 Voltage and Frequency Variation 214 4. the alternators can be run in parallel according to the requirement of the load. The replacement interface arrived first, so I swapped units and continued to receive the bouncy tachometer dial. 1 volts per cell; this means the open-circuit voltage of a fully charged 12-volt battery, which has six cells, is approximately 12. An alternator gets its name from the term alternating current (AC) 3. Since the inception of the automobile, the electrical system has been. Automatic mains failure operation incl. As the sheave (most people call it a "pulley") is rotated by a belt connected to the automobile engine's crankshaft, a magnet is spun past a stationary set of three-phase windings (called the stator ), usually connected in a Y. regulation and parallel operation of generators, motor starting, characteristics and applications. 33 / b - 07. Describe the purpose and function of single and three phase alternators. The combined system is operational if either is available. Connecting a group of alternators parallel to a bus bar and the alternators should have same voltage and frequency as that of bus-bar. I ordered replacements for both the alternator and the interface. (ii) Frequency of EMF generated should be equal. Charging System Operation 149 Figure 8-3. The simplest excitation system consists of a shunt wound machine as exciter. How does an AC generator work? The working principle of an alternator or AC generator is similar to the basic working principle of a DC generator. Pratap, “Comparison of a single pulsed alternator with two or more in parallel for driving a railgun,” IEEE Transactions on Magnetics, vol. 375 leading. Running machine is the machine which carries the load. Note: alternator performance is significantly affected by vehicle RPM and temperature. The field excitation is provided by a standard brushless excitation system which consist of rotating armature diode, diode bridge and stationary field. for Parallel Operation A correctly fitted and adjusted droop current transformer (CT) allows the alternator to share reactive current for stable parallel operation. txt) or view presentation slides online. Voltage regulators find their applications in computers, alternators, power generator plants where the circuit is used to control the output of the plant. Synchronization of alternator means connecting an alternator into grid in parallel with many other alternators, that is in a live system of constant voltage and constant frequency. 1 Voltage and Frequency Variation 214 4. voltage, of course alternator output at engine idle speed had to get better. The power output of an alternator is 40 kW and KVAR component is – 25. The DMC can either be installed separately at a. (Power Factor=Cos φ) of the load. com email: [email protected] 60 Question bank. 1288 ˜ fax 916. The parallel operation and load sharing between two alternators are possible because of alternator internal reactance which limits the short circuit current and allows angular displacement between two stations. my electro alternators must be s PRODUCT MODULES DOUBLE VOLTMETER CODE 190-001 MOVING COIL. 8 Synchronization 34 2. 3 Procedure to Parallel a Turbo Alternator 36. operation and up to 20A, field current and terminal voltage are linearly dependent. SERVICING PMGR STARTERS. An automotive alternator is a three-phase generator with a built-in rectifier circuit consisting of six diodes. DOUBLE YOUR POWER PARALLEL KIT (#7668) *Increases electrical current upon demand; above rated output when starting electric motors. Existing system may not be. Since apprentices are likely to be required to parallel alternators driven by dc motors sometime in their instruction, the following steps outline the procedure for paralleling these machines. Lesson 21: Alternator Capabilities and Parallel Operation PPT. Parallel Operation Of Alternators. MX341 AVR This sophisticated AVR is incorporated into the Stamford Permanent Magnet Generator (PMG) control system. 3219 GB - 4. Table of contents: part-i: dc machines magnetic circuits and induction principles of electromechanical energy conversion basic concepts of rotating electrical machines construction of dc machines armature reaction and commutation in dc machines operating characteristics and application of dc generators parallel operation of dc generators operating characteristics and applications of dc motors. An AC generator (alternator) is based on the rotation of a magnet inside a fixed-loop conductor. As the ratings of the alternator continues to increase, it is getting difficult to supply excitation for the large alternators by d. See diagram to the right. Above figure helps you understanding how an. 60 Question bank. backup, Cogen, islanding or market pool price) Operating Regime (intended for parallel operation hours per year) Rating Generator fuel type Yes No Yes No Yes No Yes No Generator type (Synchronous/ Induction /Asynchronous/Wind/Fuel cells) Rated KVA. It consists of a group of individual electro-magnets arranged in such a way that they form a hollow cylinder, with one pole of each magnet facing toward the center of the group. Alternator c. Synchronization of two Three Phase Alternators, by a) Synchroscope Method b) Three dark lamp Method c) Two bright one dark lamp Method 6. The Mac Plus provides constant power to the service battery, even when the alternator is inactive. 625 leading (C) 0. Type of operation (e. Get PDF (4 MB) Abstract. Parallel Operation of Alternators. Requirements for Successful Parallel Operation 2. speed and frequency of synchronous generator April 15, 2017 Tags: Synchronous Generator The frequency of the generated voltage depends upon the number of field poles and on the speed at which the field poles are rotated. 2 - 4 POLES ALTERNATORS 3. The transformers are connected in parallel on both primary and secondary side. Batteries charge based on the voltage applied to their terminals. The DMC also provides power transfer control functions in some applications. When power is applied to the alternator, the output relay contacts change state each time the control voltage is disconnected. of the alternator. The rotor and stator of an alternator are a belt-driven group of magnets inside copper wiring that creates a magnetic field. PARALLEL OPERATION OF ALTERNATORS Alternators are connected in parallel to (1) increase the output capacity of a system beyond that of a single unit, (2) serve as additional reserve power for expected demands, or (3) permit shutting down one machine and cutting in a standby machine without interrupting power distribution. Abstract—Thermal analysis of Lundell alternators used in automobiles is presented. AC GENERATOR OPERATION AC Generators Paralleling AC Generators Most electrical power grids and distribution systems have more than one AC generator operating at one time. To enable parallel operation between machines, and in. polyphase alternators must have the same. Applies when pairing two inverter generators with the same output. For two or more generators to operate in parallel, the following conditions usually must be met and maintained:. Explain the infinite bus concept and compute power. An alternator is an electrical machine which converts mechanical energy into alternating electric energy. , the lightest in its class. 1 Procedure for Manually Synchronizing the Diesel Alternator 35 2. REV 5/14 Web Site: www. engine should develop rated horse power to drive 250kVA alternator. Toyota Charging Systems Typical charging system components include: IGNITION SWITCH When the ignition switch is in the ON position, battery current energizes the alternator. SINGLE PAGE ORIGINAL JP2 TAR download. Synchronous Motor 1534 Alternator—voltage Regulation eterminalion 01 voltage Regulation—Synchronous Impedence Method—Rothert's. An automotive alternator is a three-phase generator with a built-in rectifier circuit consisting of six diodes. If the input to the prime mover of an alternator is kept constant but the excitation is changed then the. atkinsonelectronics. Parallel kit sold separately. Laboratory exercises will demonstrate the theoretical concepts and give experience. To properly parallel a generator using the three-bulb method, the generator should be brought up to a few RPM over synchronous speed and the excitation should be adjusted so that the voltages on the two sides of the switch are approximately equal. Parallel operation of transformers is used for load sharing. Such transients are caused by operation of breaker and isolator in the primary circuits of current transformer and potential transformer, severe over voltage are also caused by breaking of control circuit relay contact etc. A Resumé of the Conditions for Parallel Operation of Alternators 3S2. • Coordination of the two inputs, allowing parallel operation. Explanation: The power √3 V L I L Cos φ delivered by the alternator for the same value of current, depends upon p. Some high-end models, such as Honda EB10000 use more accurate digital DAVR. In Electrical Machine Lab - 2, one number of code EE-592 are performed. Unit-4: SYNCHRONOUS MOTORS,Principle of operation,Methods of starting synchronous motor,Behaviour of a synchronous motor,Equivalent circuit model and phasor diagram. EMF equation and Phase sequence in alternators. Particularly is this true, in the present ease, where the writer's device for synchronizing alternators is directly re- sponsible for the presentation of this paper. Rotor BlockedRotor FreeLoad is osborne an introduction to game theory pdf download. The load sharing between two steam-driven alternators operating in parallel may be adjusted by varying the (a) field strengths of the alternators (b) power factors of the alternators. Noise CAUTION Alternators in operation emit noise. Alternators Parallel Operation of Alternators [3/21. Synchronising Current 4. ALTERNATOR & PARALLEL OPERATION EXPERIMENT SYSTEM Model Number : GOTT-APOE-01 YOUR SOLUTION TO EDUCATION TRAINING SYSTEM E-20 www. system grounding is the ratio of the available ground-fault current to the available three-phase fault current. power equations, parallel operation of alternators. The speed of the incoming alternator must be such that its frequency equals to the bus-bar frequency. MX341 AVR This sophisticated AVR is incorporated into the Stamford Permanent Magnet Generator (PMG) control system. Will get short-circuited. Generator Synchronization A stationary generator must not be connected to live Busbars because the induced EMF is zero at standstill resulting in a short circuit. Electrical Machines is designed for the students of electrical and allied engineering programs to explain the principle, construction, and working mechanism of various AC and DC Machines. 13 Download PDF Download Citation View References Email Request Permissions. The parallel configuration of several units will provide you over 100 amperes. Regulation of 3-phase alternator by ZPF and ASA methods 9. Specification of alternators and Brushless alternator. Principle of operation and application, Its load and p. The irradiation from the. what are different types of alternator and discuss about the methods of cooling. US Patent References: 2986647: Regulator control apparatus for plural generators: 1961-05-30: 2972058. Controlling circulating currents when paralleling generators in a power system that shares a common neutral can be difficult. • Built in battery guard for the starter battery. SEMI-SOLID LINK SOLENOID INSTALLATION INSTRUCTIONS 50MT MOTOR 12V AND 24V. 5 Parallel Operation of Generators 203 4. From the figure it is clear that the moment when all the conditions of parallel operation are satisfied, the lamps should be more or less dark. Answer / deepikawalde Alternator as the name itself says, it is a machine that converts mechanical energy to AC electric power at particular current and voltage. Parallel Operation Of Alternators or Synchronous Generators: It has already been seen that in the case of interconnected systems at power stations the parallel operation of two alternators. ALTERNATOR & PARALLEL OPERATION EXPERIMENT SYSTEM Model Number : GOTT-APOE-01 YOUR SOLUTION TO EDUCATION TRAINING SYSTEM E-20 www. Parallel operation. In order to put a generator onto a live bus bar or in other words, for the parallel operation generators in ships, the following conditions must be fulfilled. Sahdev | Free Download, free download ebook of electrical machines, free download book of electrical machines, free download electrical machine book. United States Patent 3185857. SEMI-SOLID LINK SOLENOID INSTALLATION INSTRUCTIONS 37MT, 41MT and 42MT STARTERS 12V and 24V. Many alternators and loads are connected into a grid, and all the alternators in grid are having same output voltage and frequency (whatever may be the power). alternating current (AC) generators. 5 kw brushless alternators. The book begins with introductory chapters on electromechanical conversion theory, which forms the underlying principle of machines. The battery case is made of hard rubber or a high- quality plastic. Armed with this understanding, power system specifiers will be able to select the most cost-effective and reliable genset for motor- starting applications. Acquaintance with the generator nameplate data and circuit assembling. They also consist of an armature winding & a magnetic field. It divides the reactive load between the alternators operating in parallel. This app covers entire aspects of the subject, from basic engineering to advanced and modern topics related to Electrical Engineering and Technology. For parallel operation of alternators on same busbars, it is necessary to have voltage regulators with feedback of lagging current to cause voltage "droop" proportional to lagging current [usually about 3% droop for rated current lagging] or interconnection of AVRs to provide a reactive load-sharing feedback. A single alternator may not meet the total power demand of the consumers. Presentation Summary : ET 332b. [/ezcol_2third_end] Conditions for parallel operation of Transformers. Starting relay for sequential control of engagement current for dual starters in parallel operation Starter I input at starter relay Starter II input at starter relay 50e 50f Start-locking relay Input Output 50g 50h Start repeating relay Input Output 51 51e AC generator (alternator) DC voltage at rectifier. Noise CAUTION Alternators in operation emit noise. usually operate together (or in parallel), forming a large power system supplying electrical energy to the loads or consumers. the load on the synchronized alternators will be divided automatically. Synchronization of alternator means connecting an alternator into grid in parallel with many other alternators, that is in a live system of constant voltage and constant frequency. Regulation of 3-phase alternator by ZPF and ASA methods 9. PARALLEL OPERATION OF ALTERNATORS Alternators are connected in parallel to (1) increase the output capacity of a system beyond that of a single unit, (2) serve as additional reserve power for expected demands, or (3) permit shutting down one machine and cutting in a standby machine without interrupting power distribution. This can occur during peak lopping operation or in CHP stations (Combined Heat and Power) where the power flow between power station and the public grid may be very low. an alternator (1) (2) (3) DC component of armature current Second harmonic component of armature current Fundamental frequency component of armature current Fundamental frequency component of field current (1) (2) Synchronous impedance method Potier triangle method M. specifically for parallel operation with another EU2200i or EU2000i. Alternators; DC Motors 100 Interview Questions on Power Transformer. explain principles of operation and characteristics of synchronous generators and production of three-phase emfs explain the construction of alternators and the parallel operation of generators. You May also like to read: SCR Series Operation Tutorial SCR Parallel Connection Diode Power Loss Calculation Power Diode – An Introduction Thanks for reading about the series and parallel connection of Power Diodes… Please leave your comments below which is highly appreciated…. (b) demagnetizing. Parallel operation of Three Phase Alternator. The large machine. Load test on a wound rotor Induction Motor and deriving its performance characteristic. Box 8003 Wausau, WI 54402-8003. Eccleshall and S. For parallel operation of alternators on same busbars, it is necessary to have voltage regulators with feedback of lagging current to cause voltage "droop" proportional to lagging current [usually about 3% droop for rated current lagging] or interconnection of AVRs to provide a reactive load-sharing feedback. clarianlabs. com email: [email protected] The reasons to combine starter and alternator in a single machine of increased power rating are: • A desire to eliminate the starter which is only a passive component during engine operation. The on and off of any of the alternator will not affect the working of the power system. > Synchronous alternators have limited ability to absorb kVAR from load devices, and exceeding this limit will result in generator set shutdown. Parallel operation. Transformer View Answer / Hide Answer. GENERATOR 280–430 Frame Installation, Operation, and Maintenance Manual Marathon Electric Mfg. Parallel 2. > Consider modifying system sequence of operation. Parallel Operation of Generators The easiest way to setup a parallel system is to use generators that are exactly alike, or at least have the same output rating and alternator pitch. Paralleling of alternators is required to share total load that exceeds the capacity of the single machine, to reduce operating cost and cost of energy generation, to ensure greater security of supply. 1 General At manufacture, the 12 pole stator assembly was wound with 2 circuits in parallel. cadmium and alkaline types; series and parallel connection of cells eg terminal voltage, internal resistance and its effect on terminal voltage and load current supplied by a battery 2 Understand the theory, construction and operation of resistive and capacitive devices. The output of the alternator section supplies alternating voltage to the load. Impedance of a Alternator 5. )--University of Illinois. An alternator that uses a permanent magnet for its magnetic field is called a magneto. Collection of delco alternator wiring diagram. For specific data contact Marathon Electric. The proposed system captures important characteristics of alternator that include excitation of alternator as well as voltage control method. In order to evaluate the performance of the alternator under variable load conditions, both the machine and rectifier systems shall be modeled with appropriate magnetic and electrical models. Low speed usually also means low power. Book Overview. Click to expand I am running a 10SI alternator, and have a 1amp 400volt diode that will be going in line, so I guess my little LED light will be fine if it's not needed to excite the alternator. Reasons of Parallel Operation. Existing system may not be. Parallel connection of alternator with heater core When building in the liquid-cooled alternators, it is necessary to ensure the appropriate flow of the coolant through optimal alternator operation is ensured, regardless the conditions in which the alternator operates. Parallel Operation of Generators The easiest way to setup a parallel system is to use generators that are exactly alike, or at least have the same output rating and alternator pitch. It is always difficult to meet the extra load demand by a single generator, or it is not possible to give supply when one generator is out of order. AC, DC Motors and Generator Operations EXPLAIN the purpose, function, operation, maintenance, and troubleshooting techniques of DC and AC (1 and 3) motors and generators and their major components. In the droop speed control mode the speed will decrease by a fixed percentage when the generator is loaded from no-load to full load. 60 Question bank. generators. batterytender. Reversat 1 Electrical Engineering Department UFRGS, Federal University of Rio Grande do Sul 103 Osvaldo Aranha Avenue, Porto Alegre-RS (Brazil). What will be the value of tanφ (φ being the power factor angle) ? (A) 0. • B is the alternator output wire that supplies current to the battery. An alternator or AC generator (dynamo) is a device which convert mechanical energy to electrical energy. Continuous Operation 11. With air-cooled alternators, the cooling output is a function of speed, which results in. When the alternator is operating normally, any number of batteries can be hard connected to the bus. (b) voltage rating. Consider identical machines 1 and 2, Fig. the alternator and start motor for the engine is replace with the integrated starter generator (ISG) which is coupled with the high voltage main battery through the inverter. ‏In this system tripping is generally delayed for discrimination purposes. • IG is the ignition input that turns on the alternator/regulator assembly. An alternator has three main components, each playing a specific role to keep the car's battery fully charged. Alternators Parallel Operation of Alternators [3/21. When using an external power Source, do not turn on battery or alternator switches until power is disconnected, to avoid damage to the ternators a weak battery draining off part of the current being supplied by the external source. There are two control methods for the generator AVRs to achieve this:. 375 leading. Synchronous Generator (Alternator) 2. Sales Promises. Rotor and Stator The rotor and stator of an alternator are a belt-driven group of magnets inside copper wiring that creates a magnetic field. Three lamps (each of which is rated for alternator terminal voltage) are connected across the switches of the alternator-2. Test alternator operation. Basics of Paralleling Synchronous operation of two or more generator sets connected together excitation to the alternators. See diagram to the right. Power—parallel Operation of two Alternators—Effect of un- "Qua I Voltages—Distribution of Load—Time-Period of Oscil- lation—Maun1LJm power Output—Questions and Answers On Alternators. Synchronous Machines: GATE (EE) 4. Parallel Operation Of Alternators. 1 - application The R 449 voltage regulator is of a shunt type. sets can be prevented from operation, discon-necting means are often different. Parallel Operation of Two Generators of Same Size a) Synchronization 1. parallel operation of generator gives more reliability to the system,they prevent outages if one alternator fails,also they follow the synchronism and work together with high efficiency. Parallel operation of alternators free pdf Shubert it pdf browser plugin linux deb Case study on tata nano pdf Regra de tres simples e composta em pdf Dd form 1351 2c continuation pdf Sol y viento en breve pdf Microsoft sql server 2008 beginners guide pdf. Another flexible approach to backing up your power requirements is to have two or more generators of variable output. 65 Viva - voce Questions. All STAMFORD alternators and some AvK alternators are wound with a 2/3rd winding pitch with minimal triplen harmonics. nz and we can help and order it in. general test on alternator, Emf equation of the alternator, Characteristic and voltage regulation of the alternator, Parallel operation and synchronisation of three phase alternators, Synchroscope method, Brushless alternator, Synchronous motor, MG set and rotary converter and inverter. Parallel operation of alternators Published in: Journal of the Institution of Electrical Engineers ( Volume: 42 , Issue: 195 , June 1909) Article #: Page(s. Synchronisation is carried out in order to parallel a Generator onto a live Bus-bar, either in Island mode ( with multiple Generator sets as the only supply), or to the Utility. The main parts of a generators are: carbon brushes, slip-rings, rotor and stator. • Synchronizing current - it is the current generated by one machine which sets. > Synchronous alternators have limited ability to absorb kVAR from load devices, and exceeding this limit will result in generator set shutdown. The power output of an alternator is 40 kW and KVAR component is - 25. To find the percentage regulation of 3-phase alternator by synchronous impedance method at various power factor and load. Use the quick connect terminal provided. This product is extensively used in various places for managing the power supply in industrial operations, building and other places. Table of contents: part-i: dc machines magnetic circuits and induction principles of electromechanical energy conversion basic concepts of rotating electrical machines construction of dc machines armature reaction and commutation in dc machines operating characteristics and application of dc generators parallel operation of dc generators operating characteristics and applications of dc motors. García , L. With only two units operating, the spinning units each oper - ated at rated capacity (~1400 kW each) to dispatch approximately 65% of the entire power system load. Power Systems: Basic power generation concepts; transmission line models and. The easy answer, and in most cases the best solution due to lack of maintenance,. 4 - Commissioning 3. PARALLEL OPERATION OF ALTERNATORS Alternators are connected in parallel to (1) increase the output capacity of a system beyond that of a single unit, (2) serve as additional reserve power for expected demands, or (3) permit shutting down one machine and cutting in a standby machine without interrupting power distribution. One circuit is the external load, and the other is the local internal circuit, i. This can occur during peak lopping operation or in CHP stations (Combined Heat and Power) where the power flow between power station and the public grid may be very low.
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