With the increasing number of enterprises producing group hoist electric hoists, the same lifting group hoist electric hoist models have been diversified, which brings great difficulty to customers who buy equipment. How do we detect whether the group hoist electric hoist Achieving standards is something we must know. Explain in detail for everyone:
1. The lifting chain of the group hoist electric hoist should not be lower than the provisions of GB/T10051.1. 2. The hoisting chain of the group hoist electric hoist should be equipped with a guide device to assist the normal engagement of the chain with the hoisting sprocket and cruise ship. The unstressed end of the lifting chain shall be provided with a restricting device to prevent the lifting chain from overcoiling and pulling away from the lifting sprocket. 3. The motor of the group hoist electric hoist should use AC asynchronous motor. The thermal classification of the motor insulation mechanism is not less than Class B. Motor protection, etc. are not less than the IP level specified in GB/T4942.1. 4. The mechanical performance test of group hoist electric hoist hooks shall comply with national regulations. 5. The group hoist electric hoist should indicate the rated lifting weight of the chain hoist in a prominent position of the lower hook, and there should be a locking device to avoid the accidental slipping of the rigging. The lower hook must be able to rotate 360 ​​degrees in a universal direction, and the steering is flexible. 6. The motor winding of the group hoist electric hoist should be able to withstand the withstand voltage test for 1 minute without insulation breakdown for the metal of the casing. 7. The group hoist electric hoist For motors with a rated power not greater than 1.1 KW, the leakage current should not be greater than 10 mA during the test, and for motors with a rated power greater than 1.1 KW, the leakage current should not be greater than 20 mA during the test. 8. Under the conditions of rated voltage, rated frequency and no-load state, the deviation of any one of the three-phase currents of the three-phase motor from the average value of the three-phase motors shall not be greater than the average value of the three-phase motors.