At present, with the increasing number of small and medium-sized enterprises that produce electric hoists in the market, there are various types of the same lifting hoist models, which brings great difficulty to customers and friends who purchase equipment products, so how do we check Whether the newly purchased electric hoist meets the standard is the standard we must know. Let’s talk for everyone. You can check whether your electric chain hoist meets the standard according to the following conditions: (1) The electric hoist motor adopts an AC asynchronous motor. The thermal classification of the motor insulation mechanism should not be lower than Class B. Motor protection, etc. shall not be lower than the IP level specified in GB/T4942.1. (2) The motor windings should be able to withstand the withstand voltage test for 1 minute without insulation breakdown on the metal of the shell. (3) For motors with rated power not greater than 1.1KW, the leakage current during the test should not be greater than 10 mA, and for motors with rated power greater than 1.1 KW, the leakage current during the test should not exceed 20 mA. (4) Under the rated voltage, rated frequency and no-load state, the deviation of any one phase of the three-phase current of the three-phase motor from the three-phase average value should not be greater than the three-phase average value.
(5) The mechanical performance test of the hook shall comply with national regulations. (6) The rated lifting capacity of the electric chain hoist should be marked in a prominent position on the lower hook, and there should be a locking device to prevent accidental slippage of the rigging. The lower hook must be able to rotate 360 ​​degrees in a universal direction with flexible steering. (7) The lifting chain should not be less than the provisions of GB/T10051.1. (8) The lifting chain should be equipped with a guide device to assist the normal meshing of the chain with the lifting sprocket and the cruise ship. The unstressed end of the lifting chain shall be provided with a limiting device to prevent the lifting chain from being over-rolled from the lifting sprocket.