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Mechanical and Electrical Installation NICE3000
new
User Manual
- 64 -
Table 3-17 Slow-down distances based on different rated elevator speeds
Rated Elevator Speed V ≤ 1.5 m/s 1.5 m/s < V ≤ 2.4 m/s 2.4 m/s < V ≤ 3.7 m/s
Distance of slow-down 1 1.3 m to H/2 1.3 m 1.3 m
Distance of slow-down 2 - 3.2 m 3.2 m
Distance of slow-down 3 - - 8.0 m
Note
• "H" in the table indicates the landing height. The slow-down 1 will reset the terminal floor
display, and the slow-down 1 switch needs to be installed within H/2.
• The slow-down distances above are calculated on the basis of the default values (special
deceleration rate 0.9 m/s
2
, and acceleration rate and deceleration rate 0.6 m/s
2
).
• Increasing the acceleration rate and deceleration rate or reducing the special deceleration rate
may bring safety hazard. If any change is need, re-calculate the slow-down distance by using
the above formula.
3.8.3 Installation of Limit Switches
The up limit switch and down limit switch is to protect the elevator from over travel top/
bottom terminal when the elevator does not stop at the leveling position of the terminal floor.
• The up limit switch needs to be installed 30−50 mm away from the top leveling position.
The limit switch acts when the car continues to run upward 30−50 mm from the top
leveling position.
• The down limit switch needs to be installed 30−50 mm away from the bottom leveling
position. The limit switch acts when the car continues to run downward 30−50 mm from
the bottom leveling position.
3.8.4 Installation of Final Limit Switches
The final limit switch is to protect the elevator from over travel top/bottom terminal when the
elevator does not stop completely upon passing the up/down limit switch.
• The up final limit switch is mounted above the up limit switch. It is usually 150 mm away
from the top leveling position.
• The down final limit switch is mounted below the down limit switch. It is usually 150 mm
away from the bottom leveling position.