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This document provides an overview of an electrical technology course, including: - A list of 9 chapter topics covering concepts like DC circuits, AC fundamentals, single and three phase AC circuits, transformers, DC motors, and more. - A section on electrical protection devices like fuses, MCBs, and MCCBs and their ratings and braking capacities. - Descriptions of different types of earthing methods including plate and pipe earthing, including materials used and installation details. - A brief definition of troubleshooting as the process of detecting faults in a circuit using instruments like megger, testers, and multimeters.
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This document discusses the MOSFET (metal-oxide-semiconductor field-effect transistor). It describes the basic construction of a MOSFET including its four terminals - source, gate, drain, and body. It also outlines the different types of MOSFETs including depletion and enhancement forms, as well as P-type and N-type. The document discusses the working, characteristics, configurations, advantages and disadvantages of MOSFETs.
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This document discusses the MOSFET (metal-oxide-semiconductor field-effect transistor). It describes the basic construction of a MOSFET including its four terminals - source, gate, drain, and body. It discusses different types of MOSFETs including depletion-mode and enhancement-mode. The working, characteristics, configurations, and advantages/disadvantages of MOSFETs are also summarized.
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Metal Oxide Semiconductor Field Effect Transistors
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1) Over current occurs when electric current exceeds intended levels, potentially causing equipment damage from excess heat. It can be caused by short circuits, overloading, design flaws, or ground faults.
2) Over current relays contain a current coil. During normal operation, the magnetic effect is insufficient to trigger the relay. During over currents, the increased magnetic effect overcomes the restraint, moving the contact to isolate the circuit.
3) Over current relays come in instantaneous, definite time, and inverse time variations depending on their time of operation. Inverse time relays isolate faults faster for more severe over currents.
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Protective relays are used to isolate faults in electrical systems and protect equipment from damage. There are different types of relays including electromagnetic, solid-state, and microprocessor-based relays. Relays are used for motor protection including overload protection, locked rotor protection, and single phase/unbalance protection. Transformer protection includes gas and temperature monitoring as well as differential and ground fault protection. Generator protection includes differential, ground fault, and negative sequence protection to prevent phase unbalancing.
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This document provides information on Series datar miniature circuit breakers (MCBs) and earth leakage circuit breakers (ELCBs). It discusses the features, technical specifications, applications, standards, ordering procedures and diagrams of MCBs and ELCBs. The key points covered are the salient features of MCBs including current limiting design, trip-free mechanism, and padlocking facility. It also describes the tripping characteristics of B, C and D type MCBs and their applications. For ELCBs, it highlights their current-operated mechanism, neutral advance mechanism, and protection from electric shocks.
Thông số MCB LS
This document provides information on miniature circuit breakers and residual current devices, including:
- Miniature circuit breakers of types BKP, BKN, and BKH with ratings from 1A to 125A and characteristics curves of B, C, and D.
- Residual current circuit breakers with overcurrent protection of types RKP, RKS, RKS-b, 32KGR, and 32GRh with ratings from 3A to 50A.
- Residual current circuit breakers of types RKN and RKN-b with ratings from 25A to 100A.
- Isolators of type BKD with ratings from 40A to 125A.
It provides specifications
220kv-switch-yard-ppt.pptx
This document summarizes a study of the 220kV switchyard at Dr. NTTPS power plant. It discusses the six batch members who conducted the study and provides an introduction to Dr. NTTPS and the switchyard. The switchyard receives power from various sources via transmission lines and distributes it to several substations. It contains various equipment like bus bars, isolators, circuit breakers, transformers, and insulators. The document describes the different types and components of insulators, bus bars, circuit breakers including SF6 circuit breakers, instrument transformers, and the power line carrier communication system used at the switchyard. It concludes with discussing the tasks and purpose of the switchyard.
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The document outlines the supply, erection, testing and commissioning of various electrical equipment items at BHEL Haridwar for a 2.8 MW resistance furnace. The items include:
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2. An LT distribution panel with incomers, feeders and a bus coupler.
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4. Additional works like earthing pits are also specified. The scope of work, terms, project schedule and responsibilities of both parties are defined.
Circuit Breakers for Low Voltage Applications
Features, Working principles, and differences of Miniature Circuit Breaker(MCB), Moulded Case Circuit Breaker(MCCB) and Residual Current Circuit Breaker (RCCB) are explained in basic terms.
UNIT 2 THERMAL AND ELECTRICAL ENERGY BASED PROCESSES.pptx
This document discusses various unconventional machining processes involving thermal and electrical energy. It focuses on electric discharge machining (EDM) and wire cut EDM, describing their working principles, process parameters, equipment and applications. Key topics covered include the use of dielectric fluids, power circuits and electrode materials in EDM. Thermal energy based processes of laser beam machining, electron beam machining and plasma arc machining are also introduced, outlining their principles, beam control techniques and typical applications in industry.
Tiga Earth Mat Presentation
The document discusses the grounding design of the Kano Hydro Power Station in Nigeria. It provides background on the authors and Skipper Electrical. It then summarizes the key aspects of designing the grounding system, including measuring soil resistivity, calculating touch and step potentials, and following relevant safety standards and codes. The results of the initial grounding design are presented, but the final design had to be re-evaluated after excavation revealed much higher soil resistivity in some areas than initially measured. The final design ensures touch and step potentials are within safe limits across the power house and switchyard.
IEEE Blue Book
This document provides an overview of IEEE Standard 1015-1997, which recommends practices for applying low-voltage circuit breakers used in industrial and commercial power systems. It discusses classifications and types of circuit breakers, standards, ratings and testing procedures. The key types are molded case circuit breakers, insulated case circuit breakers, and low voltage power circuit breakers. It provides details on interrupting ratings, voltage ratings, temperature considerations, and other factors involved in properly applying circuit breakers.
C.S.P.D.C.L.AMBIKAPUR (TOWN)
The document summarizes a presentation on vocational training provided by CSPDCL. It discusses the training location and dates, supervisor, and topics covered including substation equipment, types of transformers, circuit breakers, busbars, fuses, and protection schemes. It also reviews maintenance procedures for transformers, circuit breakers, isolators, and discusses capacitor banks for power factor improvement.
c4interc
This document summarizes reliability testing performed on multilayer ceramic (MLC) decoupling capacitors with C4 interconnects. It discusses three types of capacitors - DCAP, LICA, and LP-LICA - which differ in size, capacitance, and number of plates. Extensive reliability stress tests were conducted, including thermal shock, moisture resistance, thermal cycling, high temperature bias, and temperature humidity bias. No failures were observed for any capacitors during the tests, and all electrical parameters remained stable, demonstrating the reliability of the C4 interconnect technology for MLC decoupling capacitors.
Fuse characteristics
The document describes an experiment conducted to determine the time-current characteristics of fuse wires with different ampere ratings (5A, 10A, 15A). The experiment involved measuring the time taken for fuses to melt when subjected to increasing current levels. Graphs of time versus current were plotted for each fuse rating, showing that fuses with higher ratings took less time to melt at a given current. The graphs exhibited an inverse relationship between time and current.
Case study sterlite deadend grip
The document discusses a solution to strengthen a transmission line conductor where the original dead end sleeve failed due to being the wrong material. The proposed solution involves applying a helical reinforcing layer and dead end grip directly to the conductor to provide sufficient mechanical strength without needing a sleeve. Experimental tests showed this design passed load tests and corona/RIV testing, providing an effective fix for the transmission line issue.
What is the Difference Between MCB, MCCB, ELCB and RCCB?
This document explains the key differences between various types of circuit protection devices:
- MCB (Miniature Circuit Breaker) is rated up to 100A and has non-adjustable thermal or magnetothermal operation.
- MCCB (Molded Case Circuit Breaker) is rated up to 1000A and has adjustable trigger characteristics and thermal or magnetothermal operation.
- Air and vacuum circuit breakers are for larger industrial systems, rated up to 10,000A and 3000A respectively, with fully adjustable settings.
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Catalog hitachi hitachi switch&breaders ctlg eng-dienhathe.org
This document provides information on low voltage magnetic contactors, circuit breakers, earth leakage breakers and relays. It describes the types and models of these devices, their ratings and specifications. The document discusses magnetic starters and contactors, molded case circuit breakers, earth leakage breakers, earth leakage relays and air circuit breakers. It provides details on their components, configurations, capacities and technical specifications.
Bus duct fabrication
Bus ducts are used to carry high currents between generators and transformers in power stations. They use thick aluminum conductors that are enclosed in aluminum to safely carry large currents up to 20,000 amps. Aluminum is used as the conducting material due to its lower cost compared to copper. There are two main types of bus ducts: isolated phase and segregated phase. Isolated phase ducts have each phase conductor enclosed separately while segregated phase ducts house the three phases together with insulating barriers between them.
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Để nhận báo giá sản phẩm LS vui lòng gọi: 0907.764.966
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The document discusses polyphase circuits, including:
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Dielectric heating occurs when a non-conducting material is subjected to an alternating electric field, causing dielectric losses that generate heat within the material. The heat generated is proportional to frequency and voltage. Common applications include heating plastics, food processing, and industrial uses like curing and drying. Induction heating uses electromagnetic induction to generate eddy currents within a conductive material, heating it through resistive losses. It can be applied directly by inducing currents in the target material or indirectly by first heating a container that then transfers heat through radiation or convection. Proper selection of frequency allows controlling the heating depth and uniformity.
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Installation
- 1. ELECTRICAL TECHNOLOGY Electricity is not a fun but easy to learn.
- 2. Prepared by, Mr. Vijay Balu Raskar CHAPTER NUMBER NAME OF CHAPTER (Polytechnic) 1 D.C. CIRCUITS 2 A.C. FUNDAMENTALS 3 SINGLE PHASE AC CIRCUITS 4 THREE PHASE AC CIRCUITS 5 SINGLE PHASE TRANSFORMERS 6 D.C.MOTORS 7 FRACTIONAL HORSE POWER MOTORS 8 INSTALLATIONS,EARTHING AND TROUBLE SHOOTING 9 DIFFERENT TYPES OF MOTORS
- 3. PROTECTION Fuse HRC-Fuse MCB MCCB ELCB
- 4. FUSE •There are two types. 1. Rewirable / semi- enclosed type 2. HRC type fuse
- 6. HRC FUSE
- 7. Operation of Circuit Breaker (See the Circuit Diagram on Black Board)
- 8. Rating of MCB Up to 100A Braking Capacity:- 3KA Rating of MCCB Up to 1600A Braking capacity:- 85KA Rating of ELCB 30mA for Domestic 100mA for Industrial 300mA for Higher Leakage
- 9. EARTHING 1.Plate Earthing 2.Pipe Earthing
- 10. PLATE EARTHING Material :- Any metal Earth Plate:- 60CM X 60CM X 3.18mm Galvanized Plate:- 90CM X 90CM X 6.35mm. With Layer of salt & coke (Alternate). Layer thickness will be 15CM in deep
- 11. PIPE EARTHING Galvanized iron pipe is used. Diameter is not less than 38.1mm and 2m in length for ordinery soil and 2.75m for dry. At top funnel fill with salty water.
- 12. TROUBLE SHOOTING It is the process of detecting faults in the circuit. Instruments:- Megger, Tester, Multimeters, test lamp etc.
- 13. THANKS YOU