After a period of preservation, transportation, change of season or a long downtime of electric motors must be put into operation.The proper start depends on many things: the service life, performance protection circuits, and control the number of subsequent repairs, etc.If the machine starts with a commissioning.They should be organized on the basis of official instructions.Each company has its own way relates to their conduct.But the main work before the first launch of the equipment are the same for most machines:
- primarily held organizational activities: work permit is issued, or an order to carry out these works, produced the necessary permits and briefings formed the brigade.
- After that responsible staff makes the necessary equipment off and puts on a protective earthing line.
- Checking the absence of stress as with instruments and contact with live parts.
- You can check the electric motor.Let's start with a visual inspection and testing of the rotor.The shaft should be easily scrolled manually or, in the case of machines with a large capacity, other means.At the same time there should be no extraneous sounds from the bearings.Check lubrication required mark, replace it if necessary.
- Now remove Barno and check there is no voltage on the power cord and power supply circuits Anti-condensation coil.Disconnect the power cables from the machine.
- Disassemble the copper connector and check the resistance of each winding micrometer.It should be the same, there should be different from the passport data.We are testing high voltage windings using a special device.If all is well, collect the required circuit winding.
- Also check the electric motor preheater and restore the electrical circuit.
- similar scheme check the thermistors.After the end of verification work pay attention to torque the bolts and the absence of foreign objects in barns.
- Close the lid.If the electric motor is explosion-proof, it is necessary to check the availability of special seals and lubrication.All bolts must be tightened to the correct torque.
remains to verify the addressing lines and high voltage test it.If all the parameters are normal, it is possible to engage in the scheme of control and protection.Each electric motor must be protected by the basic parameters: the permissible overcurrent, overvoltage, etc.After checking the control and protection system to restore operation all the switching and do a trial run.
It should also be noted that other types, for example, an electric DC motor checked similarly.Small differences in testing and preparation for the launch depend on those or other requirements of different companies.
