EN IEC 60034-23:2019 pdf free download

EN IEC 60034-23:2019 pdf free download
EN IEC 60034-23:2019 pdf free download.Rotating electrical machines
4.5 System efficiencies
If a motor has already been updated to an energy efficient machine, then a repair is often the most environmentally friendly solution to extend the life of the machine, and maintain its rated efficiency. During the course of a machine evaluation the decision to repair or replace should be considered. This is often the best time to calculate whether replacement with a new, more efficient machine would be cost effective.
This varies greatly with the number of hours the machine is used and requires careful specialist consideration. As an example, unregulated pumps, fans, and compressors might use more energy, depending on how much they are used, due to less slip and the higher speeds of energy efficient motors. The application might be suitable for use with a converter to overcome this problem, or the impeller could be re-profiled. Many machines are also special due to limitations of size, fit, duty, speed, torque, etc. Consideration should also be given to the possible lower downtime and lower carbon footprint of a repair and re-use.
Electric motors are generally very efficient and reliable converters of energy. The majority of wasted energy and energy losses are often caused in other areas of the driven system such as pumps, piping design, gearboxes, fans and fan ducting, compressors, wiring, transmission etc. All of these items should be looked at as a complete system when looking for energy savings.
4.6 Environment and End of life recycling
Environmentally there are many advantages in a service centre handling a machine at, or close to, the end of its life and environmentally disposing of replaced machines to remove them from the system. Where hazardous substances (such as asbestos, PCB, lead, etc.) are identified, suitable measures shall be adopted using best practice to meet legislative requirements on their removal and disposal.
a) Root cause failure analysis of a failed machine can identify problems of overloading, contamination, misalignment, faulty power supply, incorrect application, design or contractual limitations, etc., and significantly increase the service life of the repaired machine, or any new replacement.
b) The feasibility of whether a machine should be repaired or replaced can be calculated by a service facility taking into account its actual usage, power usage, cost of repair, cost of replacement, and payback period.