Description: Required procedures for performing design tests for high-voltage distribution class and power-class fuses, as well as for fuse-disconnecting switches and enclosed single-pole air switches, are specified. These design tests, as appropriate to a particular device, include the following test types: dielectric, interrupting, load-break, making-current, radio-influence, short-time current, temperature-rise, time-current, manual operation, thermal-cycle, bolt torque, and liquid-tightness.
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