A sheave used to equalize tension in opposite parts of a rope. Because of its slight movement, it is not termed a running sheave.
Service classification covered by CMAA Specification No.70, “Specifications for Electric Overhead Traveling Cranes."
Used for lifting and/or moving loads intermittently over variable paths.
Four main categories:
- Hand trucks
- Riding trucks
- Automatic guided vehicles or AGVs (computer-guided and controlled riding trucks)
Motor winding insulation rating which indicates its ability to withstand heat and moisture.
A method of control by which the fixed line voltage and frequency is changed to a three-phase system with infinitely variable voltage and frequency.