Passenger elevators revised publication effective jun. Mitsubishi electric manufactures highprecision motors by making use of our unique motor and wire winding technologies. Elevator cars are pulled up by means of rolling steel ropes over a deeply grooved pulley, commonly called a sheave in the industry. Relies on a pulley system drive sheave controlled by an electric motor to move the car using hoist ropes. The elevators can be broadly classified as either electric traction type or hydraulic type. It is used in electric trains, tramcars, trolley buses and diesel electric vehicles etc. In addition to the wmcp forms, a logs and procedures supplement is provided at no additional cost. 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. Most commonly seen in hotels, apartments, mixeduse buildings and commercial offices, mrl elevators can handle 2 to 25 stops with a. The sheaves have a counterweight attached at their end to balance the load of the elevator car. You are purchasing a wmcp for compliance with the asme a17. The traction machine is the most important component of an elevator.
Traction elevators mostly require more space and are bulkier. Residential elevators exclusive auto lowering emergency exit feature allows the luxury lift traction llt to lower automatically to the next landing, allowing passengers to exit safely in the event of a power outage. Coordinate shaft dimensions with specified manufacturer and. Section 14210 electric traction elevators uc davis health. The weight of the car is balanced by a counterweight since 1900. Sometimes two elevators are built so that their cars always move synchronously in opposite directions, and are each others counterweight. Oct 16, 2018 traction lifts are faster compared to their hydraulic counterparts. Traction elevators are lifted by ropes, which pass over a wheel attached to an electric motor above the elevator shaft. Controller closets self supported and building supported. The corresponding well sizes, pit depth, headroom, machineroom details and type of car and landing doors are also.
Edit or delete subparagraphs c, d and e to suit the project. Machineroomless elevators utilize a gearless traction machine located in the hoistway. This makes the traction units much more suitable for higherrising, modern buildings. Items listed in the singular apply to each and every elevator in this specification except where noted. Only one elevator may be removed from service at a time, all other elevators must. They are used for mid and highrise applications and have much higher travel speeds than hydraulic elevators. The complete conventional motor, including drive gears, must be large enough to match. Kone monospace 500 is a flexible elevator solution for low to midrise buildings both new and existing. The use of a counterweight assists the machine in turning the elevator sheave, which moves the cab through the hoistway. The supplement contains multiple templates for creating the many other documents that are required as part of a code.
Modernization of eleven 11 gearless overhead traction passenger elevators. Machineroomless elevator mitsubishi electric elevators. Imperial electric gearless ac machines use rugged cast iron frames protecting a totally enclosed, selfcooling motor. 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, including. But new traction system called machine room less lifts require much lesser space. So eliminating the machine room can save an average of 120 square feet per elevator. The unified facilities criteria ufc system is prescribed by milstd 3007 and provides planning, design, construction, sustainment, restoration, and modernization criteria, and applies to the military departments, the defense agencies, and the dod field activities in accordance with.
The extent of the work is indicated on the drawings. Manufacturers of electric traction elevators 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. When geared traction elevators are required the machineroomless type is not acceptable. It offers a spacesaving application, distinct design options, integrated green technology and smooth, quiet performance. Also, traction mrls eliminate problems associated with hydraulic equipment i. The revolutionary gen2 elevator is transforming the industry we created more than 160 years ago. The renewed kone monospace 500 machine roomless elevator combines our proven ecoefficient technology with ridecomfort and design innovations. Traction lifts is essentially a box on steel ropes that are looped around sheaves connected to an electric motor. The major difference between traction and hydraulic elevators is in the way the systems transport the cab. The feature may be installed in the elevator which is currently in use. Actual model specified may be influenced by single or dual door access, number of stops, travel height, etc.
Traditional geared traction elevator systems consist of cables connected to the top of the cab operated by an electric motor located in a penthouse above the elevator shaft, as shown in figure 3. With traction elevators, the cab is raised and lowered by traction steel ropes or belts on a pulley system. Learn more about the schindler 3100, a costeffective, commercial mrl traction elevator for two to threestory buildings. Our suspension traction media enables the schindler 3300 to glide peacefully through your building. The safety of these elevators is an ongoing concern of reclamation. Association national electrical code nfpa 70 and the international. The elevator equipment shall be quiet and smooth running and shall not exceed the following maximum noise output levels during all phases of operation. Provide at least one passenger elevator for each new and renewed texas state university building of more than a single story, except as otherwise approved by the director of facilities planning, design and construction. The typical traction elevator machine requires about, on average, 120 sq feet for the machine.
The gen2 family of elevators blends convenience, style and performance to deliver a new passenger experience that adds value to any residential, commercial, hospitality, medical or industrial building. Schumachers mrl elevators are ideal when space for a machine room is not available. A piston within a cylinder at the base of the elevator pushes the car up and down. By electric traction is meant locomotion in which the driving or tractive force is obtained from electric motors. Removal of existing hydraulic elevator machine, motor, controller, plunger and cylinder, roller guide assemblies, buffers and pit equipment, car platform, sling and box, car doors, and hall control stations. Conduits from the closest elevator hoistway of each elevator group or single elevator to fire command room elevator control console.
Coordinate basis of specification with drawing requirements. Manufacturers of electric traction elevators arcat. So make sure to consider all these factors before choosing the right elevator between hydraulic and traction systems. Traction on the ropes raises and lowers the elevator. Specifications are subject to change without notice. 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. Electric traction and mrl transit elevatorescalator consortium 6. And you dont have to sacrifice building space or sustainability. Traction lifts are faster compared to their hydraulic counterparts.
Geared traction elevators are typically used for small lowrise structures. Electric traction has many advantages as compared to other nonelectrical systems of traction including steam traction. Imperial electric elevator traction machines motion control. Traction elevators shall be standard available machine room less mrl elevators except where special project requirements require conventional geared. Looking down on a traction elevator system that sustained. An electric traction passenger elevators, complete with electrically operated geared traction machine, overspeed safety, overspeed governor, brakes, buffers. Learn about schindlers 3300 mrl elevator for low to midrise buildings. 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. A counter weight makes the elevators more efficient by.
Machine roomless mrl traction elevators schumacher. For general electrical requirements, refer to division 16. 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. Maintenance, inspection, and testing of electric and. Compared to the same type of elevator without a regenerative converter, this. It can fit into the footprint of a hydraulic elevator while delivering larger cabs and more usable building space. In addition, mrls are economical because they require less power, when compared to traditional geared traction equipment. Geared and gearless traction elevators with machine room. Copyright 1999 aia masterspec 299 section 14210 electric.
Introduction to elevator introduction to elevator technology mass. Traction elevators have an elevator car and counterweight attached to opposite ends of hoist ropes. Traction elevators are the most common type of elevators. A traction elevator is as quiet and smooth as compared to most conventional hydraulic systems on the market. Coordinate locations and dimensions of other work relating to electric traction elevators including pit ladders and sumps in pits. Traction elevators may be geared or gearless based on building height, speed requirements, and cost considerations.
Wiring and connections under part 2 of this section. The mrl application utilizes a drive sheave, motor, counterweight, and ropes which are the same components used by the geared and gearless traction elevator. Our hydraulic elevators use environmentallysafe fluids and we even make an innovative elevator that fits entirely in the hoistway. Lighting and convenience outlets in elevator pit and machine room. Elevator movements go virtually unnoticed which will certainly be appreciated by guests in your building. Schindler 3100 lowrise machine room less mrl elevator.
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