Article 5.6.2.2.1.1 of EN 81-20:2014 requires that the tripping of the overspeed governor for safety gear shall occur at a speed equal to 115% of the rated speed and less than the following conditions:
![\boxed{0.8 \quad \left [ \frac{m}{s} \right ]}](https://www.idrostech.com/wp-content/ql-cache/quicklatex.com-251e1ffb271a0e33076a5299ddcbd00a_l3.png "Rendered by QuickLaTeX.com")
for instantaneous safety gears except for the captive roller type;
![\boxed{1.0 \quad \left [ \frac{m}{s} \right ]}](https://www.idrostech.com/wp-content/ql-cache/quicklatex.com-4503bb3e2af188ee41682a4aa4b53e9b_l3.png "Rendered by QuickLaTeX.com")
for instantaneous gears of captive roller type;
![\boxed{1.5 \quad \left [ \frac{m}{s} \right ]}](https://www.idrostech.com/wp-content/ql-cache/quicklatex.com-0689ec16082ee73a5b0035ddae2299f0_l3.png "Rendered by QuickLaTeX.com")
for instantaneous safety gears with buffered effect and for progressive safety used for rated speed not exceeding 1.0 m/s;
![\boxed{1.25 \cdot v + \frac{0.25}{v} \quad \left [ \frac{m}{s} \right ]}](https://www.idrostech.com/wp-content/ql-cache/quicklatex.com-ffe2da5287ca08d16c523886e689d5da_l3.png "Rendered by QuickLaTeX.com")
for progressive safety gear for rated speed exceeding 1.0 m/s.