Article 188.8.131.52.1.1 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:
for instantaneous safety gears except for the captive roller type;
for instantaneous gears of captive roller type;
for instantaneous safety gears with buffered effect and for progressive safety used for rated speed not exceeding 1.0 m/s;
for progressive safety gear for rated speed exceeding 1.0 m/s.