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10-6-3 Installation Position of Upward and Downward Forced Deceleration Sensors
Lx: The furthest distance between forced deceleration sensor and top and bottom floor.
Lx = (rated speed (m/s) × 0.75)
L1: Distance between the first one forced deceleration sensor and top and bottom floor.
L2: Distance between the second one forced deceleration sensor and top and bottom floor.
L3: Distance between the third one forced deceleration sensor and top and bottom floor.
L4: Distance between the fourth one forced deceleration sensor and top and bottom floor.
CAM: The effective length of forced deceleration sensor cam
Lm: The furthest installation distance for the first one forced deceleration sensor.
Lm = 0.45 × floor height of the top/bottom floor and sub-top/sub-bottom floor.
1. If Lx ≤ Lm, install the first one forced deceleration sensor at Lx. L1 = Lx
2. If Lx > Lm, install the second one forced deceleration sensor at Lx and install the first one
forced deceleration sensor at Lm. L1 = Lm, L2 = Lx.
3. If L2 - L1 > CAM, install the third one forced deceleration sensor at Lx. L1 = Lm, L3 = Lx, L1 +
CAM ≥ L2 ≥ L3-CAM
4. If L3 - L1 > 2 CAM, install the fourth one forced deceleration sensor at Lx. L1 = Lm, L2 = L1 +
CAM, L4 = Lx, L2 + CAM ≥ L3 ≥ L4-CAM.
5. If L4- L1 > 3 CAM, install an auxiliary sensor for the fourth one forced deceleration sensor
between the fourth one forced deceleration sensor and the third one forced deceleration
sensor. The auxiliary sensor should be connected with the circuits of the fourth one forced
deceleration sensor to make sure that the third one forced deceleration sensor has been
activated before the fourth one forced deceleration sensor signal deactivates.
6. If Lx – Lm is zero or a negative value, install the first one forced deceleration sensor.
If Lx – Lm is a positive value and ≤ CAM, install the second one forced deceleration sensor.
If Lx – Lm is a positive value, and larger than one times of CAM but smaller than or equal to
two times of CAM, install the third one forced deceleration sensor.
If Lx – Lm is a positive value, and larger than two times of CAM but smaller than or equal to
three times of CAM, install the fourth one forced deceleration sensor.
If Lx – Lm is a positive value, and larger than three times of CAM but smaller than or equal to
four times of CAM, install the fourth one forced deceleration auxiliary sensor.
If Lx – Lm is a positive value, and larger than four times of CAM but smaller than or equal to
five times of CAM, install two fourth one forced deceleration auxiliary sensors.
2
÷ (2 x Pr.04-08)
10-19
Chapter 10 Auto-tuning Process | IED-S
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