The elevator or escalator major alterations is a legal terms for some modifications in the existing elevators and escalators. To ensure the public safety, the elevator engineers need to arrange a examination after the major alterations.
For the escalator modernization, this applied for major alterations for just leave the truss in the current escalator site when replacing some critical parts, even replace the controller and the motor.
Common definitions of the elevator major alterations by countries
Notes and references
- hkill.hk - Hong Kong Ordinances (<Lifts and Escalators (Safety) Ordinance (Chapter 327)> Section 4: Lift major alterations)
- hkill.hk - Hong Kong Ordinances (<Lifts and Escalators Ordinance (Chapter 618)> Sched 1 Major Alterations) (Escalator major alterations definition added)
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Concept: Destination dispatch • Elevator algorithm • Elevator control system • Elevator machine room • Elevator maintenance • Elevator major alterations • Elevator modernization • Machine room less elevator
Elevator systems, controllers and equipments: Elevator fixtures • Elevator keys • Elevator special modes • Elevator doors • Door cam • Door interlocks (Interlock wiring communication system) • Door restrictor • Elevator Inspection Certificate • Emergency stop button • Floor designators • Gate switch • Old Deadman controls • Overspeed governor • Motor-generator set & Silicon-controlled rectifier (for DC-powered elevators) • Insulated-gate bipolar transistor (for AC-VVVF-powered elevators) • Regenerative converter (for AC-VVVF-powered elevators)
See also: List of elevator fixtures guide • List of elevator and escalator companies • Elevator door sill guide (Generic elevator component door sill guide) • Floor numbering (Unlucky floor numbers) • Elevator incidents and accidents
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