MI Elevator Mechanic case studies
MI Elevator Mechanic · Put your knowledge to work in context.
The Michigan Elevator Mechanic credential is a state-issued license that allows you to install, alter, maintain, and repair elevators, escalators, dumbwaiters, moving walks, and related conveying equipment in Michigan. It is intended for technicians who work under an elevator contractor and need to demonstrate competency to regulators, employers, and building owners. The MI Elevator Mechanic case studies are 5 cases and about 2,885 words.
1Controller and Door Operator Replacement in an Occupied 1968 Building
A 1968 six-story office building in Grand Rapids has a 2,500 lb, 350 fpm traction elevator with a relay controller and a motor-generator set. The owner wants to keep the existing car enclosure, 42-in car doors with a 36-in clear opening, and door tracks.
653 words, about 3 min2VVVF Drive Overvoltage on an Empty Car Traveling Up
A 12-story gearless traction elevator has a 2,500 lb capacity, a 3,500 lb car, a 4,750 lb counterweight, and a rated speed of 350 fpm. The motor is 40 hp, 480 V, three-phase, and the new VVVF drive has a nominal 650 V DC bus.
606 words, about 3 min3Governor Trip Speed After a Contract-Speed Increase
A 500 fpm, 2,500 lb passenger traction elevator is due for its annual test. The car governor nameplate reads 600 fpm.
542 words, about 3 min4Hydraulic Car Settling After Leveling
A four-stop hydraulic elevator in a Michigan medical office has a 40 ft rise, 2,500 lb capacity, an 8-in single-stage jack, and a 25 hp pump. The car settles about 3/8 in below the floor after 10 minutes at the top landing.
570 words, about 3 min5Michigan Licensing, Permit, and Rigging on a Buried Cylinder Job
A Michigan-licensed elevator contractor is replacing a buried submersible hydraulic cylinder at a four-story school. The crew includes one licensed elevator mechanic, two apprentices, and one laborer.
514 words, about 3 min