Experiment No. 1. Three Phase Transformers
|
|
- Erik Goodwin
- 7 years ago
- Views:
Transcription
1 Experiment o. 1 Objective: The objectives of this experiment are to find the approximate per phase equivalent circuit parameters of a -φ transformer bank using short circuit and open circuit tests and to determine the regulation and efficiency of the transformer bank through load test. The regulation and efficiency of the transformer bank determined through load test will be compared with those calculated using the transformer parameters. Apparatus: φ variac 2. 2 Test tables. 4 multimeters 4. 2 wattmeters kva - φ transformer Bank φ Resistive load bank with fan φ Capacitive Load Bank Procedure: 1. Short Circuit Test: a) Refer to Fig.1 for Short circuit test. Connect the high voltage windings of each 1-φ transformer in parallel and then connect them in STAR configuration. Connect the low voltage windings of each 1-φ transformer in parallel and then connect them in DELTA configuration. Make sure that the transformer is connected according to nameplate specifications. b) Connect the three phases of the low voltage windings to test table 2. Connect the three phases of the high voltage windings through the test table to the output terminals of the variac. Make sure that all test table line switches are open. Connect the input terminals of the variac to the 120V power panel. Do not turn on power. Have the lab instructor check your set up. c) With the test table's line switches still open, turn on power and adjust the variac until its output voltage is zero. 1/11
2 d) Calculate the rated current for the input windings. Check your value with the lab instructor. Make sure that your current transformer is set up to handle this current. e) Protecting the measuring instruments, close the test table line switches. Immediately after closing the line switches check the current in lines 1,2 and. The current should be close to zero. If the current is not close to zero de-energize your circuit and recheck it. f) Increase the output voltage of the variac until the ammeter in line 1 indicates rated current. Measure and record V H12, V H2, V H1, I H1, I H2, I H, I X1, I X2, I X, P HWM1 and P HWM2. Protect your measuring instruments and de-energize the circuit. should be taken with great precaution as you may see currents as high as 100A! 2. Open Circuit Test: a) Refer to Fig.2 for Open circuit test. Connect the high voltage windings of each 1-φ transformer in parallel and then connect them in STAR configuration. Connect the low voltage windings of each 1-φ transformer in parallel and then connect them in DELTA configuration. Make sure that the transformer is connected according to nameplate specifications. b) Connect the three phases of the high voltage windings to test table 1. Make sure that the output connections are open circuited! Connect the three phases of the low voltage windings through test table 2 to the output terminals of the 120V power panel. Make sure that all test table line switches are open. Do not turn on power. Have the lab instructor check your set up. g) Measure and record V X12, V X2, V X1, I X1, I X2, I X, P XWM1, P XWM2, V H12, V H2 and V H1. should be taken with great precaution as you may see voltages as high as 420V!. Transformer with R Load: a) Set up the circuit as shown in Fig.. b) Make sure that the resistance bank is connected to rated voltage. Open circuit the secondary; i.e., resistance set to infinity. Turn O the mains and then turn the switches on the test table to O position. c) ow adjust the resistive load until I H1 = I H2 = I H = rated current. Measure and record V X12, V X2, V X1, I X1, I X2, I X, P XWM1, P XWM2, V H12, V H2, V H1, I H1, I H2, I H, P HWM1, P HWM2 and P HWM for rated current. ote that a two-wattmeter method is used on LV side and a three-wattmeter method on HV side for measurement of three-phase power. So the selection switch on HV side should be used only between positions 1- and -. 2/11
3 d) ow vary the load resistance such that I H1 = I H2 = I H equals ½ of rated current. Measure and record the same quantities as in step c for each value of I H. 4. Transformer with RC Load: a) Set up the circuit as shown in Fig.4. b) Make sure that the resistance and capacitive bank are connected to rated voltage. Open circuit the secondary by setting the resistance bank and capacitance bank to infinity. Turn O the mains and then turn the switches on the test table O. ow adjust the resistive and capacitive loads such that they draw equal currents and the line currents I H1 = I H2 = I H = rated current. Measure and record V X12, V X2, V X1, I X1, I X2, I X, P XWM1, P XWM2, V H12, V H2, V H1, I H1, I H2, I H, P HWM1, P HWM2 and P HWM for rated current. ote that a two-wattmeter method is used on LV side and a threewattmeter method on HV side for measurement of three-phase power. The selection switch on HV side should be used only between positions 1- and -. c) ow vary the load resistance such that I H1 = I H2 = I H equals ½ of rated current. Measure and record the same quantities as in step c for each value of I H. Report: 1. Designate the parallel connected low voltage (X) windings the primary and the parallel connected high voltage (H) windings the secondary. 2. Using the data found in the open circuit test calculate R C,X1 and X M,X1. G CX1 is given by G MX P oc V oc 2 P oc V oc 2 B M,X is given by 2 2 B MX Y oc G MX Where Y oc I oc V oc /11
4 I oc V oc P oc I X1 + I X2 + I X CT V X1 + V X2 + V X12 PT WMR PT CT P XWM1 + P XWM2 ( ) Where WMR is the Wattmeter ratio, CT is the current transformer ratio and PT is the Potential Transformer ratio (Treat PT = 1 for the whole experiment).. Using the data found in the short circuit test calculate R eq,h and X eq,h. R eqh is given by V sc Z eqh I sc X eq,h is given by 2 2 X eqh Z eqh R eqh Where R eqh P sc I sc 2 Draw the approximate per phase transformer equivalent circuit with all parameters referred to the primary (LV side) as shown in Fig 5. Show the calculated values of each parameter. Remember to include units. Remember the short circuit test was performed with the voltage applied to the high voltage side! Also make a note of the transformation ratio a. 4. Efficiency from input and output power measurements: The efficiency of a transformer is given by: P out %η 100 P in a) Using the data gathered in Part, Transformer with R Load, calculate the efficiency (η) of the transformer for full, ½ and no load. b) Using the data gathered in Part 4, Transformer with RC Load, calculate the efficiency (η) of the transformer for full, ½ and no load. 4/11
5 5. Voltage regulation from the voltage measurements: Voltage regulation of a transformer is given by: %Reg V HLLnoload V HLLload V HLLload Where V HLL = the average Line to Line voltage on HV side. a) Using the data gathered in Part, Transformer with R Load, calculate the voltage regulation of the transformer for full, ½ and no load. b) Using the data gathered in Part 4, Transformer with RC Load, calculate the voltage regulation of the transformer for full, ½ and no load. 6. Efficiency from the transformer equivalent circuit parameters: a) Using the values of V XL (LV side average line to neutral voltage), I X (LV side average current), and PF (power factor), gathered in Part, Transformer with R Load, and the equivalent circuit of your transformer, calculate the efficiency of the transformer for full, ½ and no load. b) Using the values of V XL (LV side average line to neutral voltage), I X (LV side average current), and PF (power factor), gathered in Part 4, Transformer with RC Load, and the equivalent circuit of your transformer, calculate the efficiency for the transformer for full, ½ and no load. 7. Voltage Regulation from the transformer equivalent circuit and its parameters a) Using the values of V XL (LV side average line to neutral voltage), I X (LV side average current), and PF (power factor), gathered in Part, Transformer with R Load, and the equivalent circuit of your transformer, calculate the voltage regulation of the transformer for full, ½ and no load. b) Using the values of V XL (LV side average line to neutral voltage), I X (LV side average current), and PF (power factor), gathered in Part 4, Transformer with RC Load, and the equivalent circuit of your transformer, calculate the voltage regulation for the transformer for full, ½ and no load. 8. Compare the results found in step 4 with 6 and step 5 with 7 of the report section. Calculate percent differences. What conclusions can you draw? 5/11
6 Table1: Short Circuit Test: Quantity Measured reading HV Side P HWM1 P HWM2 V H12 V H2 V H1 I H1 I H2 I H LV Side I X1 I X2 I X Table 2: Open Circuit Test: Quantity Measured reading LV Side P XWM1 P XWM2 V X12 V X2 V X1 I X1 I X2 I X HV Side V H1 V H2 V H 6/11
7 Table : R Load: Quantity Full Load ½ Full Load LV Side P XWM1 P XWM2 V X12 V X2 V X1 I X1 I X2 I X HV Side P H1 P H2 P H V H1 V H2 V H I H1 I H2 I H 7/11
8 Table 4: RC Load: Quantity Full Load ½ Full Load LV Side P XWM1 P XWM2 V X12 V X2 V X1 I X1 I X2 I X HV Side P H1 P H2 P H V H1 V H2 V H I H1 I H2 I H I HR1 I HR2 I HR I HC1 I HC2 I HC 8/11
9 A VARI 1H TEST TABLE1 HV SIDE STAR LV SIDE DELTA TEST TABLE2 H1 H X1 X 1X C B 2H H1 H X1 X 2X H H1 H X1 X X Fig.1. Short Circuit Test, Part 1 LOW VOLTAGE SIDE SHORT CIRCUITED A 1X TEST TABLE 2 LV SIDE HV SIDE TEST TABLE 1 DELTA STAR H1 H 1H X1 X C B 2X X1 X H1 H 2H X X1 X H1 H H HIGH VOLTAGE SIDE OPE CIRCUITED Fig.2. Open Circuit Test, Part 2 9/11
10 A 1 TEST TABLE 2 TEST TABLE 1 LV SIDE HV SIDE DELTA STAR 1 H1 H X1 X I HR1 C B 2 X1 X H1 H 2 I HR2 R R R X1 X H1 H I HR Fig.. Transformer with resistive load, Part Fig.4. Transformer with resistive and capacitive load, Part 4 10/11
11 R eq,x X eq,x I X I H a a = X H V XL V X G M,X B M,X av H a 2 Z LOAD Fig. 5. Per Phase Equivalent Circuit referred to LV side for the φ Transformer. 11/11
Equipment: Power Supply, DAI, Variable resistance (8311), Variable inductance (8321)
Lab 4: 3-phase circuits. Objective: to study voltage-current relationships in 3-phase circuits; to learn to make delta and Y connections; to calculate and measure real, apparent, and reactive powers. Equipment:
More informationEquipment: Power Supply, DAI, Transformer (8341), Variable resistance (8311), Variable inductance (8321), Variable capacitance (8331)
Lab 5: Single-phase transformer operations. Objective: to examine the design of single-phase transformers; to study the voltage and current ratios of transformers; to study the voltage regulation of the
More informationThree phase circuits
Three phase circuits THREE PHASE CIRCUITS THREE-PHASE ADVANTAGES 1. The horsepower rating of three-phase motors and the kva rating of three-phase transformers are 150% greater than single-phase motors
More informationTHE PER-UNIT SYSTEM. (2) The per-unit values for various components lie within a narrow range regardless of the equipment rating.
THE PER-UNIT SYSTEM An interconnected power system typically consists of many different voltage levels given a system containing several transformers and/or rotating machines. The per-unit system simplifies
More informationPower measurement in balanced 3 phase circuits and power factor improvement. 1 Power in Single Phase Circuits. Experiment no 1
Experiment no 1 Power measurement in balanced 3 phase circuits and power factor improvement 1 Power in Single Phase Circuits Let v = m cos(ωt) = cos(ωt) is the voltage applied to a R-L circuit and i =
More informationChapter 24. Three-Phase Voltage Generation
Chapter 24 Three-Phase Systems Three-Phase Voltage Generation Three-phase generators Three sets of windings and produce three ac voltages Windings are placed 120 apart Voltages are three identical sinusoidal
More informationNO LOAD & BLOCK ROTOR TEST ON THREE PHASE INDUCTION MOTOR
INDEX NO. : M-142 TECHNICAL MANUAL FOR NO LOAD & BLOCK ROTOR TEST ON THREE PHASE INDUCTION MOTOR Manufactured by : PREMIER TRADING CORPORATION (An ISO 9001:2000 Certified Company) 212/1, Mansarover Civil
More informationFirst Year (Electrical & Electronics Engineering)
Z PRACTICAL WORK BOOK For The Course EE-113 Basic Electrical Engineering For First Year (Electrical & Electronics Engineering) Name of Student: Class: Batch : Discipline: Class Roll No.: Examination Seat
More informationTHREE PHASE CIRCUITS
THREE PHASE CIRCUITS A. PREPARATION 1. Three Phase Voltages and Systems 2. The Determination of Phase Sequence 3. Blondel's Theorem and Its Consequences 4. References B. EXPERIMENT 1. Equipment List 2.
More informationJEFFERSON ELECTRIC, INC. Buck-Boost Transformer Application Manual
JEFFERSON ELECTRIC, INC. Buck-Boost Transformer Application Manual Revised on February 15, 2012 Table of Contents I. Introduction... 2 II. Choosing the Proper Transformer... 2 III. Rapid Selector Charts...
More informationTRANSFORMER LOSS COMPENSATION FOR METERMEN PRESENTED BY: MICHAEL K. BEARDEN
TRANSFORMER LOSS COMPENSATION FOR METERMEN PRESENTED BY: MICHAEL K. BEARDEN WHAT are transformer losses? TRANSFORMER LOSS COMPENSATION THE WHAT, WHEN, WHO, WHERE AND HOW Transformer losses can be viewed
More informationFig. 1 Analogue Multimeter Fig.2 Digital Multimeter
ELECTRICAL INSTRUMENT AND MEASUREMENT Electrical measuring instruments are devices used to measure electrical quantities such as electric current, voltage, resistance, electrical power and energy. MULTIMETERS
More informationSolar Energy Discovery Lab
Solar Energy Discovery Lab Objective Set up circuits with solar cells in series and parallel and analyze the resulting characteristics. Introduction A photovoltaic solar cell converts radiant (solar) energy
More informationHow To Wire A Three Phase, Single Phase, Wye Transformer
Three-Phase Transformers When more power is needed - three transformers can be tied together. This is called three-phase. Here s a simple way of comparing single-phase to threephase power. Single-Phase
More informationECE 431. Experiment #1. Three-Phase ac Measurements. PERFORMED: 26 January 2005 WRITTEN: 28 January 2005. Jason Wells
ECE 41 Experiment #1 Three- ac Measurements PERFORMED: 6 January 005 WRTTEN: 8 January 005 Jason Wells LEADER: Jason Wells RECORDER: Nathaniel Hakes 1 ntroduction The primary objectives of the experiment
More informationEEL303: Power Engineering I - Tutorial 4
1. Determine the voltage at the generating station and the efficiency of the following system (Figure 1): Both transformers have ratio of 2kV/11kV. The resistance on LV side of both Figure 1: transformers
More informationThree-phase AC circuits
Three-phase AC circuits This worksheet and all related files are licensed under the Creative Commons Attribution License, version 1.0. To view a copy of this license, visit http://creativecommons.org/licenses/by/1.0/,
More informationFaculty of Engineering. 48572 Power Circuit Theory. Lab 2 Three-Phase Circuits
Faculty of Engineering Subject: 48572 ower ircuit Theory ssignment Number: 2 ssignment Title: Lab 2 Three-hase ircuits Tutorial Group: Students Name(s) and Number(s) Student Number Family Name First Name
More informationHPS Universal. Single and Three Phase Potted. Buck-Boost Transformers. Buck-Boost Applications & Standard Specification... 80
Buck-Boost Transformers Single and Three Phase Potted Buck-Boost Transformers Buck-Boost Applications & Standard Specification... 80 Selecting Buck-Boost Transformers... 81 Single Phase Selection Tables...
More informationModule Title: Electrotechnology for Mech L7
CORK INSTITUTE OF TECHNOLOGY INSTITIÚID TEICNEOLAÍOCHTA CHORCAÍ Autumn Examinations 2012 Module Title: Electrotechnology for Mech L7 Module Code: ELEC7007 School: School of Mechanical, Electrical and Process
More informationCurrent Transformers
Tyco Electronics Corporation Crompton Instruments 1610 Cobb International Parkway, Unit #4 Kennesaw, GA 30152 Tel. 770-425-8903 Fax. 770-423-7194 Current Transformers Current transformers (CT's) provide
More informationPHYSICS 111 LABORATORY Experiment #3 Current, Voltage and Resistance in Series and Parallel Circuits
PHYSCS 111 LABORATORY Experiment #3 Current, Voltage and Resistance in Series and Parallel Circuits This experiment is designed to investigate the relationship between current and potential in simple series
More informationPhysical Address: City: State: Zip Code:
Application for Small Generator Facility Interconnection Tier 2, Tier 3 or Tier 4 Interconnection (For Small Generator Facilities with Electric Nameplate Capacities of 10 MW and less) Applicant Contact
More informationSoftstart. Upgrade to Torque control PSTB370 1050. Contents. 1. ESD Warning...2. 2. Tools...2. 3. PCB information...2. 4. Step by step...
Softstart Upgrade to Torque control PST30 300 PSTB370 1050 1SFC132040M0201 RevA Dec-06 Contents 1. ESD Warning...2 2. Tools...2 3. PCB information...2 4. Step by step...3 5. Configuration of the LV board...7
More informationOccupational Profile: Electrical & Electronics Engineering Technician
Occupational Profile: Electrical & Electronics Engineering Technician A competent Electrical & Electronics Engineering Technician should be able to demonstrate the following skills and competences: 1.
More informationBSNL TTA Question Paper-Instruments and Measurement Specialization 2007
BSNL TTA Question Paper-Instruments and Measurement Specialization 2007 (1) Instrument is a device for determining (a) the magnitude of a quantity (b) the physics of a variable (c) either of the above
More informationThe Fundamentals of Three-Phase Power Measurements. Application Note
The Fundamentals of - Power Measurements pplication ote pplication ote 0 120 240 360 Figure 1. -phase voltage wavefm. Figure 2. -phase voltage vects. 100Ω 100Ω Figure 4. -phase supply, balanced load -
More informationSoftstart. Changing of Printed Circuit Board, Display, Keypad and upgrade to Torque control PSTB370 1050. Contents. 1. ESD Warning...2. 2. Tools...
Softstart Changing of Printed Circuit Board, Display, Keypad and upgrade to Torque control PST30 300 PSTB370 1050 1SFC132009M0201 Rev A Dec-06 Contents 1. ESD Warning...2 2. Tools...2 3. PCB information...2
More informationPower Voltage Transformers for Air Insulated Substations. THE PROVEN POWER.
Power Voltage Transformers for Air Insulated Substations THE PROVEN POWER. Introduction Trench Power Voltage Transformers (Power VTs) combine the attributes of an inductive voltage transformer with the
More informationHow To Use Multiisim On A Computer Or A Circuit Design Suite 10.0 (Aero)
MULTISIM TUTORIAL Start Click on Start All Programs National Instruments Circuit Design Suite 10.0 Multisim. Component Toolbar Ammeter/ Voltmeter Toolbar Virtual Component Toolbar Simulation Toolbar Instrument
More informationUSE OF A SINGLE ELEMENT WATTMETER OR WATT TRANSDUCER ON A BALANCED THREE-PHASE THREE-WIRE LOAD WILL NOT WORK. HERE'S WHY.
USE OF A SINGLE ELEMENT WATTMETER OR WATT TRANSDUCER ON A BALANCED THREE-PHASE THREE-WIRE LOAD WILL NOT WORK. HERE'S WHY. INTRODUCTION Frequently customers wish to save money by monitoring a three-phase,
More informationMeasurement of Power in single and 3-Phase Circuits. by : N.K.Bhati
Measurement of Power in single and 3-Phase Circuits by : N.K.Bhati A specifically designed programme for Da Afghanistan Breshna Sherkat (DABS) Afghanistan 1 Areas Covered Under this Module 1. Power in
More informationSECTION 26 09 13 - POWER MONITOR FOR ELECTRICAL, STEAM CONDENSATE, AND WATER PART I - GENERAL
SECTION 26 09 13 - POWER MONITOR FOR ELECTRICAL, STEAM CONDENSATE, AND WATER PART I - GENERAL 1.1 SUMMARY A. This section describes the requirements for the installation of Power Monitors and associated
More informationINDUCTION REGULATOR. Objective:
INDUCTION REGULATOR Objective: Using a wound rotor induction motor an Induction Regulator, study the effect of rotor position on the output voltage of the regulator. Also study its behaviour under load
More informationLab 3 Rectifier Circuits
ECET 242 Electronic Circuits Lab 3 Rectifier Circuits Page 1 of 5 Name: Objective: Students successfully completing this lab exercise will accomplish the following objectives: 1. Learn how to construct
More informationFigure. 1 - Split Phase 240/120V circuit (180 phase shift)
This technical note describes the option of connecting the 60Hz XW Inverter/Charger to a three-phase source by using a transformer to convert the AC source to split-phase 240/120V. INTRODUCTION: Split-phase
More informationApplication for Small Generator Facility Interconnection Tier 2, Tier 3 or Tier 4 Interconnection
Application for Small Generator Facility Interconnection Tier 2, Tier 3 or Tier 4 Interconnection (See ARSD chapter 20:10:36 for the requirements for a Tier 2, Tier 3, or Tier 4 Interconnection.) Applicant/Interconnection
More informationTESLA Recorder Power Metering Setup Configuration for 3 and 2 Element Watt/VAR Metering
TESLA Recorder Power Metering Setup Configuration for 3 and 2 Element Watt/VAR Metering Introduction This application note will assist the user to set up 3-phase metering to monitor Watt, VAR and VA power
More informationDigital Energy ITI. Instrument Transformer Basic Technical Information and Application
g Digital Energy ITI Instrument Transformer Basic Technical Information and Application Table of Contents DEFINITIONS AND FUNCTIONS CONSTRUCTION FEATURES MAGNETIC CIRCUITS RATING AND RATIO CURRENT TRANSFORMER
More informationET 332b Ac Electric Machines and Power Systems
Instructor: Dr. Carl Spezia, PE Office: Engr. D110 Phone: 453-7839 E-mail: powerguy@siu.edu ET 332b Ac Electric Machines and Power Systems Office Hours: 9:00 am - 10:00 am M-W-F 2:00 pm - 3:00 pm M-W-F
More informationUCI274C - Technical Data Sheet
- Technical Data Sheet SPECIFICATIONS & OPTIONS STANDARDS Newage Stamford industrial generators meet the requirements of BS EN 60034 and the relevant section of other international standards such as BS000,
More informationUCI274H - Technical Data Sheet
- Technical Data Sheet SPECIFICATIONS & OPTIONS STANDARDS Newage Stamford industrial generators meet the requirements of BS EN 60034 and the relevant section of other international standards such as BS000,
More informationATTACHMENT F. Electric Utility Contact Information Utility Name. For Office Use Only
ATTACHMENT F CATEGORY 2 GENERATOR INTERCONNECTION APPLICATION FOR ALL PROJECTS WITH AGGREGATE GENERATOR OUTPUT OF MORE THAN 20 KW BUT LESS THAN OR EQUAL TO 150 KW Also Serves as Application for Category
More informationleader in voltage regulators since 1946
Contents: Page REGULATORS - Introduction: Features - Applications... 3 - Construction - General specifications... 4 - s Available: Terminology... 5 - Single-phase variable autotransformers... 6-7 - Three-phase
More informationEffective: September 10, 2006 Vermont Attachment 1 to Rule 5.500 Public Service Board Page 1 of 6
Public Service Board Page 1 of 6 STANDARD APPLICATION FOR INTERCONNECTION OF GENERATION RESOURCES IN PARALLEL TO THE ELECTRIC SYSTEM OF: (Interconnecting Utility) Preamble and Instructions: An owner of
More informationANCILLARY EQUIPMENT AND ELECTRICAL EQUIPMENT Power Supply Systems and Electrical Equipment for Desalination Plants - Y.M. Hamud and A.H.
POWER SUPPLY SYSTEMS AND ELECTRICAL EQUIPMENT FOR DESALINATION PLANTS Y.M. Hamud and A.H. Anwar Abu Dhabi Water and Electricity Authority, Abu Dhabi, UAE Keywords : Electrical System, Network for Desalination,
More informationBCI184E - Technical Data Sheet
BCI184E - Technical Data Sheet BCI184E SPECIFICATIONS & OPTIONS STANDARDS Newage Stamford industrial generators meet the requirements of BS EN 60034 and the relevant section of other international standards
More information= (0.400 A) (4.80 V) = 1.92 W = (0.400 A) (7.20 V) = 2.88 W
Physics 2220 Module 06 Homework 0. What are the magnitude and direction of the current in the 8 Ω resister in the figure? Assume the current is moving clockwise. Then use Kirchhoff's second rule: 3.00
More informationNetwork Theory Question Bank
Network Theory Question Bank Unit-I JNTU SYLLABUS: Three Phase Circuits Three phase circuits: Phase sequence Star and delta connection Relation between line and phase voltages and currents in balanced
More informationUNIVERSITY OF NORTH CAROLINA AT CHARLOTTE. Department of Electrical and Computer Engineering
UNIVERSITY OF NORTH CAROLINA AT CHARLOTTE Department of Electrical and Computer Engineering Experiment No. 10 - Balanced Three-Phase Networks Overview: Three-phase networks can be connected either in a
More informationAlternating current three-phase circuits
Unit. C HEE-PHE CCU lternating current three-phase circuits Unit. C HEE-PHE CCU COE: hree-phase systems characteristics Generation of three-phase voltages hree-phase loads -Y and Y- transformation nstantaneous
More informationShort Circuit Current Calculations
Introduction Several sections of the National Electrical Code relate to proper overcurrent protection. Safe and reliable application of overcurrent protective devices based on these sections mandate that
More informationThevenin Equivalent Circuits
hevenin Equivalent Circuits Introduction In each of these problems, we are shown a circuit and its hevenin or Norton equivalent circuit. he hevenin and Norton equivalent circuits are described using three
More informationTHREE-PHASE POWER SYSTEMS ECE 454/554: Power Systems Laboratory
THREE-PHSE POER SYSTEMS ECE 5/55: Power Systems Laboratory Contributors: Dr... El-Keib Mr. Clifton Black Dr. Tim. Haskew Mr. Johnny Carlisle Mr. Neil Hutchins Objectives Learn how to perform measurements
More informationLecture Notes ELE A6
ecture Notes EE A6 Ramadan El-Shatshat Three Phase circuits 9/12/2006 EE A6 Three-phase Circuits 1 Three-phase Circuits 9/12/2006 EE A6 Three-phase Circuits 2 Advantages of Three-phase Circuits Smooth
More informationDiscussion on Class I & II Terminology. IEEE PES Transformers Committee Fall Meeting 2011 Boston, MA
Discussion on Class I & II Terminology IEEE PES Transformers Committee Fall Meeting 2011 Boston, MA What is Class I & II? C57.12.00 2010 is the only document we have that defined these terms. 5.10 Insulation
More informationApplying Basic Electricity Principles to Service Propane Appliances (Updated 11/2012) Performance-Based Skills Assessment Evaluation Packet
Applying Basic Electricity Principles to Service Propane Appliances (Updated 11/2012) 7.0 Performance-Based Skills Assessment Evaluation Packet Section One Task 1 Task 2 Task 3 Section Two Task 1 Task
More informationHCM434F - Winding 311 APPROVED DOCUMENT. Technical Data Sheet
HCM434F - Winding 311 Technical Data Sheet HCM434F SPECIFICATIONS & OPTIONS STANDARDS Marine generators may be certified to Lloyds, DnV, Bureau Veritas, ABS, Germanischer-Lloyd or RINA. Other standards
More informationSimple Methods for Calculating Short Circuit Current Without a Computer By Dennis McKeown, PE GE Senior System Application Engineer
Simple Methods for Calculating Short Circuit Current Without a Computer By Dennis McKeown, PE GE Senior System Application Engineer A Short Circuit analysis is used to determine the magnitude of short
More informationTRANSFORMER: THREE PHASE
CONTENTS Transformer : Three Phase 1211 C H A P T E R 33 Learning Objectives Three-phase Transformers Three-phase Transformer Connections Star/Star or Y/Y Connection Delta-Delta or Connection Wye/Delta
More informationEarthing Guidance Notes
Central Networks Earthing Manual Section E2 Earthing Guidance Notes Version: 2 Date of Issue: September 2007 Author: Nigel Johnson Job Title: Earthing Specialist Approver: John Simpson Job Title: Head
More informationFAULT FINDING MANUAL For Self Excited and Separately Excited Generators
FAULT FINDING MANUAL For Self Excited and Separately Excited Generators SAFETY PRECAUTIONS Before testing the generating set, read the generating set Installation Manual, and this Fault Finding Manual,
More informationProduct Guide. Low voltage grounding system. Answers for industry.
Product Guide Low voltage grounding system Answers for industry. Advanced switchgear solutions for process industries In today s high-tech manufacturing world, profitability can be greatly impacted by
More informationFull representation of the real transformer
TRASFORMERS EQVALET CRCT OF TWO-WDG TRASFORMER TR- Dots show the points of higher potential. There are applied following conventions of arrow directions: -for primary circuit -the passive sign convention
More informationBy Mark Coles. This article looks at the temporary use of portable generators in floating, earthed and reference-earthing scenarios.
16 Operation of portable generators Operation of portable generators By Mark Coles This article looks at the temporary use of portable generators in floating, earthed and reference-earthing scenarios.
More informationSERIES-PARALLEL DC CIRCUITS
Name: Date: Course and Section: Instructor: EXPERIMENT 1 SERIES-PARALLEL DC CIRCUITS OBJECTIVES 1. Test the theoretical analysis of series-parallel networks through direct measurements. 2. Improve skills
More informationPM734F - Technical Data Sheet Winding 28
- Technical Data Sheet Winding 28 SPECIFICATIONS & OPTIONS STANDARDS STAMFORD AC generators are designed to meet the performance requirements of IEC EN 60034-1. Other international standards, including
More informationWINDING RESISTANCE TESTING
WINDING RESISTANCE TESTING WINDING RESISTANCE TEST SET, MODEL WRT-100 ADWEL INTERNATIONAL LTD. 60 Ironside Crescent, Unit 9 Scarborough, Ontario, Canada M1X 1G4 Telephone: (416) 321-1988 Fax: (416) 321-1991
More informationAC Generators. Basic Generator
AC Generators Basic Generator A basic generator consists of a magnetic field, an armature, slip rings, brushes and a resistive load. The magnetic field is usually an electromagnet. An armature is any number
More informationTYPE TEST CERTIFICATE OF SHORT-CIRCUIT PERFORMANCE. A three-phase outdoor oil-immersed distribution transformer
168-08 TYPE TEST CERTIFICATE OF SHORT-CIRCUIT PERFORMANCE APPARATUS A three-phase outdoor oil-immersed distribution transformer DESIGNATION 1000 kva SERIAL No. 1-08-112-01-0001 Rated power Rated voltage
More informationCircuits with inductors and alternating currents. Chapter 20 #45, 46, 47, 49
Circuits with inductors and alternating currents Chapter 20 #45, 46, 47, 49 RL circuits Ch. 20 (last section) Symbol for inductor looks like a spring. An inductor is a circuit element that has a large
More informationRC Circuits and The Oscilloscope Physics Lab X
Objective RC Circuits and The Oscilloscope Physics Lab X In this series of experiments, the time constant of an RC circuit will be measured experimentally and compared with the theoretical expression for
More informationCurrent Electricity Lab Series/Parallel Circuits. Safety and Equipment Precautions!
Current Electricity Lab Series/Parallel Circuits Name Safety and Equipment Precautions! Plug in your power supply and use ONLY the D.C. terminals of the power source, NOT the A. C. terminals. DO NOT touch
More informationGE Multilin technical note
Digital Energy Multilin GE Multilin technical note eutral voltage unbalance function at grounded wye capacitor banks GE publication number: GET-8544 Copyright 00 GE Multilin eutral voltage unbalance function
More informationThe following table shows approximate percentage wise the
SHORT-CIRCUIT CALCULATION INTRODUCTION Designing an electrical system is easy and simple, if only the normal operation of the network is taken into consideration. However, abnormal conditions which are
More informationLab 7: Operational Amplifiers Part I
Lab 7: Operational Amplifiers Part I Objectives The objective of this lab is to study operational amplifier (op amp) and its applications. We will be simulating and building some basic op amp circuits,
More informationThe full wave rectifier consists of two diodes and a resister as shown in Figure
The Full-Wave Rectifier The full wave rectifier consists of two diodes and a resister as shown in Figure The transformer has a centre-tapped secondary winding. This secondary winding has a lead attached
More informationSAMPLE OF THE STUDY MATERIAL PART OF CHAPTER 3. Symmetrical Components & Faults Calculations
SAMPLE OF THE STUDY MATERIAL PART OF CHAPTER 3 3.0 Introduction Fortescue's work proves that an unbalanced system of 'n' related phasors can be resolved into 'n' systems of balanced phasors called the
More informationEXPERIMENT 7 OHM S LAW, RESISTORS IN SERIES AND PARALLEL
260 7- I. THEOY EXPEIMENT 7 OHM S LAW, ESISTOS IN SEIES AND PAALLEL The purposes of this experiment are to test Ohm's Law, to study resistors in series and parallel, and to learn the correct use of ammeters
More informationSchool of Engineering Department of Electrical and Computer Engineering
1 School of Engineering Department of Electrical and Computer Engineering 332:223 Principles of Electrical Engineering I Laboratory Experiment #4 Title: Operational Amplifiers 1 Introduction Objectives
More informationPRE COMMISSIONING TESTS ON EQUIPMENT AT 33/11 KV SUB STATIONS
PRE COMMISSIONING TESTS ON EQUIPMENT AT 33/11 KV SUB STATIONS TESTS ON TRANSFORMERS 1. IR Values a) For 33/11 KV Power Transformer 2500 V megger is to be need. b) Power Transformer neutral Earthing is
More informationRotary Phase Converters
FACTS from Ronk Electrical Industries, Inc. Bulletin 11981 Rotary Phase Converters ROTOVERTER Pat. No. 3,670,238 ROTO-CON Pat. No. 4,158,225 What are the ROTO-CON and ROTOVERTER power converters? The ROTO-CON
More informationHigh Frequency Modeling for Cable and Induction Motor Over-voltage Studies in Long Cable Drives
IEEE Industrial Application Society 36th Annual Meeting Page of 8 Chicago, Illinois, USA, September 3 October 5, High Frequency Modeling for Cable and Induction Motor Over-voltage Studies in Long Cable
More information11. MEASUREMENT OF POWER CONSUMPTION OF THE NONBALANCED THREE-PHASE LOAD
. MEASEMENT OF OE CONSMTION OF THE NONBALANCED THEE-HASE LOAD Task of the measurement. Measure the active power and the reactive power of the nonsymmetrical -phase load in Y-connection. Do not connect
More informationCreating a Usable Power Supply from a Solar Panel
Creating a Usable Power Supply from a Solar Panel An exploration in DC- DC converters By Kathleen Ellis Advised by Dr. Derin Sherman Department of Physics, Cornell College November 21, 2012 Introduction
More informationLab 1: DC Circuits. Student 1, student1@ufl.edu Partner : Student 2, student2@ufl.edu
Lab Date Lab 1: DC Circuits Student 1, student1@ufl.edu Partner : Student 2, student2@ufl.edu I. Introduction The purpose of this lab is to allow the students to become comfortable with the use of lab
More informationHow To Choose A Transformer
Consider open loop MV network as an example source 1 source 2 NC NC NC or NO main MV switchboard A B Detail design of substation NC NC NC NO NC NC switchboard 1 switchboard 2 switchboard 3 MV MV MV LV
More informationLow Voltage Transformers Sealed, General Purpose, Dry Type
Low Voltage Transformers Sealed, General Purpose, Dry Type Catalog 7400CT9601R4/08 08 Class 7400 CONTENTS Description..............................................Page Introduction.................................................
More informationPI734D - Technical Data Sheet
PI734D - Technical Data Sheet PI734D SPECIFICATIONS & OPTIONS STANDARDS Newage Stamford industrial generators meet the requirements of BS EN 60034 and the relevant sections of other national and international
More informationFAULT FINDING MANUAL. For Stamford AC Generators
FAULT FINDING MANUAL For Stamford AC Generators 1 SAFETY PRECAUTIONS Test procedures recommended in this manual assume that the reader is fully conversant with electrical safety principles, and is familiar
More informationPI734B - Technical Data Sheet
PI734B - Technical Data Sheet PI734B SPECIFICATIONS & OPTIONS STANDARDS Newage Stamford industrial generators meet the requirements of BS EN 60034 and the relevant sections of other national and international
More informationExperiment NO.3 Series and parallel connection
Experiment NO.3 Series and parallel connection Object To study the properties of series and parallel connection. Apparatus 1. DC circuit training system 2. Set of wires. 3. DC Power supply 4. Digital A.V.O.
More informationGUIDE FOR TESTING POWER TRANSFORMERS
GUIDE FOR TESTING POWER TRANSFORMERS Routine test 11/11/02 Pagina 1 di 10 INDEX Introduction... 3 1 Dielectric tests Separate-source voltage withstand test... 4 2 Induced voltage test... 5 3 Voltage ratio
More informationInductors in AC Circuits
Inductors in AC Circuits Name Section Resistors, inductors, and capacitors all have the effect of modifying the size of the current in an AC circuit and the time at which the current reaches its maximum
More informationInstrument Transformer Wiring Troubleshooting Guide Three Phase Meters Revision 0, Initial Issue, April 26, 1993
R Instrument Transformer Wiring Troubleshooting Guide Three Phase Meters Revision 0, Initial Issue, April 26, 1993 CONTENTS I. How to Use This Guide II. Common Problems for 3-Wire and 4-Wire Systems III.
More information100% Stator Ground Fault Detection Implementation at Hibbard Renewable Energy Center. 598 N. Buth Rd 3215 Arrowhead Rd
100% Stator Ground Fault Detection Implementation at Hibbard Renewable Energy Center Introduction Roger Hedding Steven Schoenherr, P.E. ABB Inc. Minnesota Power 598 N. Buth Rd 3215 Arrowhead Rd Dousman,
More informationDESCRIPTION DWG DESCRIPTION DWG
DESCRIPTION DWG DESCRIPTION DWG Ferroresonance 3451/1 3451/2 3451/3 Electro-magnetic Fields (EMF) 3462/1 HV & LV Insulators (Links) 3463/1 A ORIGINAL ISSUE B 14.07.09 APPROVED DATE J. Brooks 25.02.03 INDEX
More informationFIT TIER 2 Application
FIT TIER 2 Application Application Information The below information Auto-Fills from your registration information: Building Permit Application Date: Project Completion Date: Name: Address: City: State:
More informationPower Technology Issue 106. Modeling of Three-Winding Voltage Regulating Transformers for Positive Sequence Load Flow Analysis in PSS E
SIEMENS Siemens Energy, Inc. Power Technology Issue 106 Modeling of Three-Winding Voltage Regulating Transformers for Positive Sequence Load Flow Analysis in PSS E Carlos Grande-Moran, Ph.D. Principal
More information