标准摘要
[中文适用范围]： 包括两种类型的测试：冲击测试（在通电和未通电样本上）、碰撞测试（在未通电样本上），通常基于 IEC 68-2-27 和 68-2-29。规定的试验为型式试验。状态：所用术语的定义（在 [外文原描述]： This standard includes two types of tests: -the shock test (on energized and non-energized specimen), -the bump test (on non-energized specimen). These requirements are applicable only to measuring relays and protection equipment in a new condition.
英文名称Electrical relays - Part 21: Vibration, shock, bump and seismic tests on measuring relays and protection equipment - Section Two: Shock and bump tests