ASME HST-1-2017 pdf free
ASME HST-1-2017 pdf free.Performance Standard for Electric Chain Hoists.
brake, mechanical load: an automatic type of friction brake used for controlling loads in a lowering direction. This unidirectional device requires torque from the motor to lower a load but does not impose any additional load on the motor when lifting a load. This type of brake may also be used as a holding brake if designed as such by the manufacturer.
braking, control: a method of controlling speed by removing energy from the moving body or by Imparting energy in the opposite direction.
braking, dynamic: a method of controlling speed by using the motor as a generator, with the energy being dissipated in resistors.
braking, mechanical: a method of controlling or reducing speed by friction.
braking. regenerative: a method of controlling speed in which the electrical energy generated by the motor is fed back into the power system.
chain, load: the load-bearing chain in a hoist.
chain, roller: a series of alternately assembled roller links and pin links in which pins articulate inside the bushings. and the rollers are free to turn on the bushings. Pins and bushings are press-lit In their respective link plates.
chain, welded link: a chain consisting of a series of interwoven links formed and welded.
NOTE: Load chain properties do not conform to those shown in
ASME B29.1 or ASME B30.9.
contactor: an electromechanical device for opening and closing an electric power circuit.
control actuator: a manual means at the operating station by which hoist controls are energized.
control enclosure: the housing containing the electrical control components.
cushioned start: an electrical or mechanical method for reducing the rate of acceleration of trolley motion.
hazardous (classified) locations: locations where fire or explosion hazards may exist. Locations are classified depending on the properties of the flammable vapors. liquids or gases, or combustible dusts or fibers that may be present. and the likelihood that a flammable or combustible concentration or quantity is present. Refer to NFPA 70.ASME HST-1 pdf free download.
