Abstract :
BASICALLY, outdoor switches must operate successfully under all circuit and atmospheric conditions. A new side-break type of switch has been designed incorporating novel contact construction in order to be comparable with modern vertical break switches without flexible braids, assuring long trouble-free life, easy operation, and maintenance. Important design specifications are 1. Moving parts should be protected from the entrance of dirt or foreign matter. 2. Suitability for operation under ice conditions. 3. The switch should have silver contact surfaces and use pressures which serve to eliminate galling of the silver. 4. No flexible braids should be used in the switch. 5. The switch should conform with National Electrical Manufacturers Association (NEMA) test requirements.
