LIFT, ESCALATOR & BUILDING MANAGEMENT SYSTEM

LIFT, ESCALATOR & BUILDING MANAGEMENT SYSTEM

1. LIFTS

   • Lift performance
     • Acceleration
     • Retardation
     • Car speed
     • Door operation speed
     • Stability of speed

2. ELECTRONIC/ROPED LIFT

   • MAIN COMPONENTS
     • Control system
     • Electronic Motor
     • Sheave
     • Counterweight
     • Guide Rails

3. ROPING

   • High tensile steel ropes driven through traction sheaves attached to the motor shelf, system of pulleys and counterweight
     • SINGLE WRAP 1:1
       • Simplest but prone to slippage if subject heavy loads
     • SINGLE WRAP 2:1
       • Number of pulleys and wrapping ratios increase
     • SINGLE WRAP 3:1
       • More pulleys used

4. ACTIVE ROLLER GUIDE

   • Detect vibration during operation and cancel the vibration with optimal control electromagnetic force

5. LIFT DOOR

   • Fitted to lift car
   • Fitted to landing
   • MULTI BEAM SENSOR DOOR
     • Prevent passengers from caught by doors using multiple infrared light beams

6. MACHINE AND MOTOR ROOM

   • Located above well contains : winding gear, traction sheave, control panel overspeed governor
     • Noise must contain with adequate insulation and absorbent bedding for machinery
       • Fan assisted ventilation to remove heat

7. PIT

   • Located below lowest landing level, contains buffer
     • Slower lifts - spring-type buffers
     • Higher lifts - oil loaded buffers

8. BRAKE

   • Traction sheave drive shaft fitted with electromechanical brake
   • When lift is moving, electrically operated brakes are lifted clear of the brake drum, but when electricity off to disengage the motor, spring retainers activate the brake

9. HYDRAULIC LIFTS

   • Fluid driven piston mounted inside a cylinder. For low rise buildings
   • ADVANTAGES
     • Accuracy in floor leveling
     • Smooth ride characteristics
     • Low level plant room
     • Capacity for heavy loads

10. FIRE FIGHTING LIFT

    • Rapid emergency access
    • Contain priority break glass key switch
    • Required:
      • Two-way intercom
      • Dual power supplies
      • Manufactured from non-combustible material

11. PATERNOSTER

    • Lifts that consist chain of open compartments
      • Suited to single occupancy buildings

12. STAIR LIFT

    • Vertical transport for elderly and disabled
      • Chair moves up an inclined rail parallel with stair gradient

13. ESCALATORS

    • Conveyer transport device for transporting people, consists of staircase whose steps move up or down on tracks that keep the surfaces of individual steps horizontal
      • Angle inclination normally 30 degrees but may increase to 35 degrees
    • STEP
      • SPEED
        • The speed vary from 90 ft per mins to 180 ft per mins. An escalator move 145 ft per mins can carry more than 10,000 people an hour

14. TRAVELATORS

    • Slow conveyor belt that transports people horizontally
      • Riders can walk or stand on it. Often supplied in pairs one for each direction
        • Useful in large railways and airport terminals

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