March 03 2017 0Comment
Electric Chain Hoist (8)

Electric Chain Hoist: Final Checks before Usage

You just got your new Electric Chain Hoist put in and wish to start out using it right away. However, check that you check for the subsequent tips for a secure environment at your organisation.

  • Preparations: Read carefully what has been stated in the instruction manual provided along with the Chain hoist,  making sure that each step is correctly completed and all parts are strongly fixed.
electric hoist test
Electric Chain Hoist Primary Checks

Such  as:  

  • Is electric chain hoist correctly installed to the trolley?
  • Is trolley stopper correctly located on the beam?
  • Are bolt, nut and split pin tightened?
  • Can push-button cord wire support the pulling force made on controller suspension?
  • Is cable support strongly fixed on cable support arm?

Danger: Do remember to cut off the power source or breaker switch before repairing any machinery or electrics.

  • Lifting  Test

conntion supply

Connect main switch power to the hoist and press down push-button switch. If the hook travels in the wrong direction, the power supply phase is not right. Therefore, cut off power source or breaker switch, exchange any two phases of the three-phase electric power at the power switch of the hoist,  and then hook will travel towards the push button direction.

  • Traversing  Test: Test whether the control over trolley keeps the same direction as it travels. Make sure that trolley stably travels.   Paste  E/W  or  N/S  on push buttons.
 
  • Limit   Switch  Test: Refer to nameplates  AB   or  AC  on which writes upper limit or upper/lower limit.   They are attached on the hoist to tell which type of limit switch is fixed. No nameplate means that there is no limit switch.
    1. Upper Limit Switch: Press UP push button until lifting hook touches upper limit switch. Check if the hoist stops at the upper limit.
    2. Lower Limit Switch: Press down push-button until the bottom hook reaches the lower limit and the reverse chain stopper touches limit switch.  Check if it stops at the lower limit.

In such two cases, you should check if chain spring has enough space when it is compressed.

  • Lifting & Falling Brake Test: Lift a moderate load. Press down push-button switches to lower and/or lift or descend hook several times. When the button is released, the brake should immediately stop the motor from running and the weight should stop at the very position.
 
  • Emergency  Stop  Button   Test  (optional): While pressing down push-button switches,  press down emergency stop button and then check whether the hook has stopped running and whether the hoist works in line with push-button switch. Finally,  turn the emergency stop button to the right,  release it after it pops out.   Then operate it again.  If anyone step fails,  check connection wire and self lock of emergency stop button.

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