Electric Hoist Protection Device

Electric hoists are generally equipped with multi-directional protective devices to ensure the safety of personnel and work, but the protective devices should also meet some basic requirements.
1. It has the function of preventing danger, is suitable for the operating conditions of electric hoists, and does not hinder production and operation.
2. It is firmly installed, reliable in performance, has sufficient strength and rigidity, accurate in movement, and stable in performance.
3. It is durable and does not affect the adjustment, repair, lubrication and inspection of the hoist.
4. The protective device itself should not cause harm to the operator.
Check work before using the electric hoist
Before using the electric hoist, a simple safety check is necessary to avoid abnormal problems of some parts and do a good job of danger prevention in advance.
1. The buttons of the operating handle control the direction and the brakes and limiters are sensitive and accurate.
2. The wire rope has no defects, is well lubricated, and is neatly arranged.
3. There is no abnormal sound when the motor and reducer rotate.
4. There are no obstacles on the electric hoist track and the walking area of ​​​​people.
5. The hook and pulley can rotate flexibly.
Precautions for installing electric hoists
The installation of electric hoists is a very important job. Not only should we make good preparations before installation, but we should also pay attention to the matters that need to be paid attention to during specific installation.
A. In order to ensure that the electric hoist does not derail or collide with the body when it runs to both ends of the track, elastic buffers should be installed at both ends of the track.
B. When installing the electric hoist, check whether the plugs used to fix the wire rope are loose.
C. A grounding wire should be installed on the track or the frame connected to it. The grounding wire can be a bare copper wire of φ4-φ5mm or a metal wire with a cross-section of not less than 25mm².
D. The resistance to ground of all power circuits and control circuits of the electrical device shall not be less than 10000Ω per volt of working voltage.
Comprehensive inspection after the installation of the electric hoist
A comprehensive safety inspection is required after the installation of the electric hoist, which is very necessary from a safety perspective:
1. Whether the electrical equipment of the electric hoist is suitable for the current type and working voltage of the installation site.
2. Whether the electrical circuit connection is correct and reliable.
3. Whether the limit device action is correct, flexible and reliable.
4. Are all lubricating parts filled with sufficient lubricating oil?
5. Are the wheels and rails connected reliably?
6. When selecting the power supply cable, ensure that the power supply voltage at the hoist motor input end is not lower than the rated voltage [1].