A pickup arm clutch, vane, bayonet, or cam contacts rollers on the hoistway door which releases the door latch on the hoistway door. This section specifies the engineering, furnishing and installation of the complete electric traction elevator system as described herein and as indicated on the contract drawings. If you continue browsing the site, you agree to the use of cookies on this website. Its difficult to know what kind of elevator youre riding unless youre able to see the mechanics going on behind the scenes. Review of characteristics of different types of dc and ac motors used traction and their suitability moduleiv 10 hours rating and heating of electric drives, power loss, heating and cooling of motors, classes and duty and selection of motors, drives for specific application like steel, paper, textile mills. The seminar report explains the electric traction system which is the most efficient of all other traction systems. For example, thyssenkrupp has a variety of elevator types including traction and hydraulic systems, but its not likely that riders would even notice a difference there are different types of elevators for a reason. Now a day, magnetic traction is also used for bullet trains.
The uncomplicated design of the hydraulic elevator uses fewer moving parts to lift heavy loads and keeps maintenance costs low. This section specifies the furnishing and installation of complete and ready for operation electric traction elevator systems described herein and as indicated on the contract drawings. You can see how this system works in the diagram below. The permissible range of voltages allowed for the standardised voltages is as stated in standards bs en 50163 and iec 60850.
Torque due to the force of gravity, hoists, lifts or elevators and locomotive. Elevator car, type, elevators, traction, cables, electric. Most of these elevators are with electric traction drive with worm gear and drive sheave, manufactured in our country before more than 30 years. Electric traction is part of subject utilization of electrical energy.
The most popular elevator design is the traction elevator, which raises and lowers the car by traction steel ropes, which are attached to the elevator car and looped around a sheave. Elevator manufacturer or an experienced installer approved by elevator manufacturer who has completed elevator installations similar in material, design, and extent to that indicated for this project and with a record of successful inservice performance. When the car approaches the correct floor, the control system sends a signal to the electric motor to gradually shut off the pump. It can fit into the footprint of a hydraulic elevator while delivering larger cabs and more usable building space. By electric traction is meant locomotion in which the driving or tractive force is obtained from electric motors. Figure 1 shows in diagram the usual arrangement of car, counter balance cables, etc. Nptel provides elearning through online web and video courses various streams. But when the valve is closed, the pressurized fluid has nowhere to go except into the cylinder. Traction elevator s are complex mechanical systems that have many moving parts and electronic components and failure of any of the components could disable the functionality of the entire system. Electric traction has many advantages as compared to other nonelectrical systems of traction including steam traction. There are two major elevator designs in common use today. This ppt helps to understand the concept of electric traction slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Schumacher traction elevators are engineered for low to highrise buildings having up to 2,000 feet of travel.
Traction elevator s are complex mechanical systems that have many moving parts and electronic components and failure of any of the components could disable the functionality of. System of electric traction mechanics of train movement. Sep 21, 2017 an electric elevator uses sheaves and cables to take an elevator up and down. Changes made to masterspec by thyssenkrupp elevator are indicated using underlinestrikeout text. The companys objective is to offer the best people flow. Traction elevators often need to be modernized to improve performance, enhance safety, and to integrate more uptodate technology. Dynamic braking is the use of an electric traction motor as a generator when slowing a vehicle such as an electric or dieselelectric locomotive. This product masterspec section is licensed by arcom february, 2005 for distribution by thyssenkrupp elevator.
As the fluid collects in the cylinder, it pushes the piston up, lifting the elevator car. And you dont have to sacrifice building space or sustainability. Relies on a pulley system drive sheave controlled by an electric motor to move the car using hoist ropes. Electric traction the system which use electrical power for traction system i. In geared machines, the electric traction motor drives a reduction gearbox whose. Electric drive system will operate in steady state at this speed, provided it is. The electric traction system ppt briefly discusses the types, supply system, traction motors, braking system, advantages and disadvantages and recent trends. Our hydraulic elevators use environmentallysafe fluids and we even make an innovative elevator that fits entirely in the hoistway. When an elevator car is level with a floor landing, the power unit moves the car door open or closed. Provide materials, labor, and services necessary for the complete and safe modernization of two 2 existing elevators, the demolition and complete removal of one 1 existing freight elevator and the renovation of the elevator interior of one elevator.
All features shall be of latest international standards such as en81. All schumacher elevator company geared traction elevators meet or exceed all requirements set by the american society of mechanical engineeers asme a17. In laymans terms, traction is the gripping force along the surface. Modernization of eleven 11 gearless overhead traction passenger elevators. Download electric traction systems seminar report with ppt. On the other side hydraulic elevator converts electricity into movement. Identify different types of elevators hydraulic pneumatic. All elevator equipment shall be installed in an elevator machine room dedicated specifically for the elevator equipment. Starting with the elevator basics, the elevator system first consists of the car, which carries the passengers to the destination floor. Which of the following is an advantage of electric traction over other methods of traction. General contractor provide adequate, rollable access for delivery and. System such a diesel electric drive, electric drive etc. Review of characteristics of different types of dc and ac motors used traction and their suitability moduleiv 10 hours rating and heating of electric drives, power loss, heating and cooling of motors, classes and duty and selection of motors, drives for.
Schindler 3300 traction elevator installation checklist. Pdf decision to install and commission a modern lift or an elevator in. Hydraulic elevator systems lift a car using a hydraulic ram, a fluiddriven piston mounted inside a cylinder. Electric traction means using the electric power for traction system i.
Ppt electric traction system powerpoint presentation. Its a very important topic for various recruitment exams like state electricity board exams etc. Pdf decision factors in the selection of elevator researchgate. An electric elevator uses sheaves and cables to take an elevator up and down. Upgrading critical parts of a traction elevator can make a world of difference for you and your elevator riders, while also potentially increasing the value of your building. These illustrations are intended to be helpful for attorneys and adjusters to understand the technical aspects of this equipment and to facilitate a meaningful discussion with our technical experts. Objectives at the end of this lesson, the transit elevatorescalator trainee will. Electric traction mcqs answers pdf electrical engineering. Each year there are a few accidents with these equipments, some of them are fatal for one or more persons. Kone, one of the global leaders in the elevator and escalator industry, was founded in 1910 and celebrated its centennial anniversary in 2010.
A counter weight makes the elevators more efficient by offsetting the weight of the car and occupants so that the motor doesnt have to move as much weight. Electric traction elevators, in aec online, your source of building material and supplier information in the middle east. Items listed in the singular apply to each elevator in this specification except where noted. May 22, 2018 download electric traction systems seminar report with ppt. Licensed elevator contractors shall not leave any elevator in service if an unsafe condition exists as a result of these or any other tests. Schumacher traction elevators meet and exceed all requirements set by the american society of mechanical engineers. Traction elevators are lifted by ropes, which pass over a wheel attached to an electric motor above the elevator shaft.
Or electric traction means a locomotion in which the driving force is obtained from electric motors. There are many other voltage systems used for railway electrification systems around the world, and the list of current systems for electric rail traction covers both standard voltage and nonstandard voltage systems. Elevator doors are normally opened by a power unit that is located on top of the elevator car. Difference between hydraulic and electric elevators. Review and accept changes according to project requirements and specifiers practice. Geared electric traction elevators gearless electric traction elevators governor roped hydraulic safeties sheaves traction 5 electric traction and mrl elevators thinking back to course 200, what are some things you remember about electric traction elevators. They are used for mid and highrise applications and have much higher travel speeds than hydraulic elevators. Electric traction 1701 however, the steam locomotive suffers from the following disadvantages. Passenger cab, interior finishes, control panel and facings including cab doors. It is used in electric trains, tramcars, trolley buses and diesel electric vehicles etc. Schindler 3100 lowrise machine room less mrl elevator. All work shall be performed in a professional manner and is to include. Antony wood, 2014, a professor of architecture at the illinois institute of technology iit and. In the last lecture, we were discussing about the traction drives, and more specifically the speed time curve of a traction drive.
Most of these elevators are with electric traction. Schindler 3300 traction elevator installation checklist delivery of equipment prior to elevator equipment delivery, an enclosed dry hoistway, a ready machinery space and temporary or permanent threephase power must be available. Hydraulic elevators how elevators work howstuffworks. Ppt electric traction system powerpoint presentation free. Jan 05, 2014 in this document our elevator experts have provided generalized schematics of a hydraulic and a traction elevator. Geared traction elevators schumacher elevator company. If electric supply is used for driving a locomotive, the system is known as electric traction.
Act of drawing or being drawn is known as traction. Work under this section shall include all materials and installation for traction elevators including gearless pedestrian elevators, gearless patient elevators, and geared service elevators, as shown and detailed on the drawings and specified herein. The locomotion in which the driving force is obtained from electric motor is called the electric traction system. Research on the safety level of the existing electric traction elevators tihomir dimitrov, georgi iliev, kalin chuchuganov, pavel davidov. Traction elevators utilize an electric motor and gearbox located at the top of the hoistway to provide lifting power. Browse companies that make electric traction passenger elevators and view and download their free cad details, revit bim files, specifications and other content relating to electric traction passenger elevators as well as other product information formated for the architectural community. In ohe, or overhead electrification systems, the supply of electricity is through an overhead system of suspended cables known as. In bulgaria there are more than 80 000 elevator installations in operation. Elevator electric traction machine room instructors guide overview purpose the purpose of this module is to. With the hydraulic type driving system, the hydraulic power unit forces oil into the hydraulic jack a combined plunger and cylinder and the plunger pushes the car upwards using energy stored in the oil under pressure.
Machine roomless mrls lula elevators and holeless equipment shall not be considered. Sep 29, 2009 this ppt helps to understand the concept of electric traction slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Electrical elevator inspector are met with and the equipment. There are four basic positions in which manual arc welding is done. Electric traction mcqs answers pdf electrical engineering multiple choice questions answers. So, lifting the pantograph is the indication that is now you can lift your.
Electric traction elevator 14210, in, your source of north american building product and supplier information, including brochures, specs and cad details, since 1995. Ng p insert number to identify comment on back of this. May 22, 2016 electric traction means using the electric power for traction system i. Browse companies that make electric traction elevators and view and download their free cad details, revit bim files, specifications and other content relating to electric traction elevators as well as other product information formated for the architectural community. Unit 1 characteristics of electrical drives speed torque characteristics of various types of loads and drives motors. And to list the different components of the elevators, we must note the following. Specification for traction passenger elevators part 1 general. Traction elevators traction elevator system schumacher. Basic elevator components part one electrical knowhow. Electric traction and mrl transit elevatorescalator consortium 6.
The typical drive system for a rope type elevator has the car connected to a counterweight by a rope and pulley, and traction between the traction sheave and rope is used to pull the car up and down. Learn more about the schindler 3100, a costeffective, commercial mrl traction elevator for two to threestory buildings. There are various system of electric traction existing such as electric train, trolley buses, dieselelectric vehicles and gas turbine electric vehicles. Elevator electric traction machine room instructors guide.
In technical terms, traction is the frictional force. Jun 27, 20 electric traction the system which use electrical power for traction system i. A traction motor is an electric motor used for propulsion of a vehicle, such as locomotives, electric or hydrogen vehicles, elevators or electric multiple unit traction motors are used in electrically powered rail vehicles electric multiple units and other electric vehicles including electric milk floats, elevators, roller coasters, conveyors, and trolleybuses, as well as vehicles with. Electric traction will continue to play a dominant role in the railway since it is an. Electric traction elevators, in, your source of north american building product and supplier information, including brochures, specs and cad details, since 1995. Hydraulic elevators have a metal piston underneath the car and electric elevator have moving cables. A free powerpoint ppt presentation displayed as a flash slide show on id. It is termed rheostatic if the generated electrical power is dissipated as heat in brake grid resistors, and regenerative if the power is returned to the supply line.
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