Overspeed Governor | Lift Safety Rules 81-20

Overspeed Governor | Lift Safety Rules 81-20

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 ]} for instantaneous safety gears except for the captive roller type;

 \boxed{1.0 \quad \left [ \frac{m}{s} \right ]} for instantaneous gears of captive roller type;

 \boxed{1.5 \quad \left [ \frac{m}{s} \right ]} 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 ]} for progressive safety gear for rated speed exceeding 1.0 m/s.

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