Let X be a set and Ï a Ï-algebra over X. 1  A function Î¼ from Ï to the extended real number line is called a measure if it satisfies the following properties: 2  Non-negativity: For all E in Ï: Î¼(E) â¥ 0. 3  Null empty set: Î¼(â) = 0.
Contact wipe is an action designed into a contact so that the contact motion exceeds the initial electrical contact touch point. Using a flexible contact arm causes the contact surface to wipe against its counterpart as the arm bends slightly.
1 Starter panel routines mean inspection and cleaning of contactorâs (the switch inside the starter panel box controlling the on and off of the motors) contacts. 2  Checking of connections in the starter panel. 3  Cleaning of the complete starter panel.  Checks in the terminal box on the motor for loose connections.