Joke Collection Website - Cold jokes - Electrician, please tell me how to install UV curing equipment in the factory and how to wire the printing press.
Electrician, please tell me how to install UV curing equipment in the factory and how to wire the printing press.
Pyramid-type three-level control wiring should be adopted, that is, the first pole is the main switch of the whole plant, the second pole is the regional master control system, and roof of the world is a single circuit breaker. The total power is 60KW, the three-phase power supply is 1KW, the current is 1.8A, the current is 60KW, the starting current of the motor is about three times of the rated current, and the circuit distribution is more than 50KW, with copper wire per square millimeter. The aluminum wire is slightly weak. A current of 108A requires at least 50 square millimeters of copper wire. In actual operation, wires close to the maximum load are prone to high temperature, and aluminum wires are prone to oxidation at high temperature. When the machine is running, there is still starting current and a short circuit fault occurs. You should consider the ability of the wire to resist short-circuit current, which should at least exceed 30% of the rated current of the load, so that your main line should be above 70 square meters. The rated breaking current of the main switch of the workshop should be about 150A-200A. Ultraviolet equipment is a high-power equipment, and its circuit breaker can be matched according to the power on the nameplate of the machine, and the breaking capacity of the circuit breaker can be appropriately increased. For example, if the machine is rated as 30A, a breaker of 40A can be selected as the switch. Each machine must be protected by ground wire, and the neutral wire is not allowed to have a switch. Only switches are allowed on the phase line. However, unless the earth leakage protection circuit breaker is used, if the neutral wire does not enter the earth leakage protection circuit breaker, the earth leakage protection circuit breaker will automatically open the circuit breaker because it is mistaken for earth leakage. A circuit breaker can only control one device, and parallel control is not allowed. There should be no connectors for wires as far as possible. The connectors should be pressed and soldered with copper ears, and then insulated. Both ends of each wire should be connected with copper wire lugs. The copper wire lug should be bent into a hook shape. The screws must be tightened. All wires must be installed in trunking and conduit.
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