a conventional system with three poles circuit breaker equipped with a magnetic only trip unit for protection against short-circuits, a thermal relay for protection against overloads and phase failure or imbalance, and a contactor to operate the motor.When it comes to direct starting, ABB SACE proposes two different solutions: Start-up is a particularly critical phase for the motor itself and for the installation powering it.
Safety and reliability of solution are important aspects that must be considered when choosing and manufacturing a system for starting and monitoring motors. Motor protection is one of the most common application for moulded case circuit breakers in low voltage installations. Mentioned trip units have an option to be integrated in a communication network. Tmax T7 and T8 with PR332/P trip units and PR330/V are the answer for the same application for currents up to 1600A and 3200A. PR223DS is the solution for energy metering for Tmax T4, T5 and T6 in conjunction with voltage module VM210. The possibility to measure, transmit and store data about each load is fundamental. Examples of these loads can be machinery, any subparts of an industrial plant, the various modules that compose a data center as well as the different consumptions of a conditioning system in a mall. During the last years, the growing attention to the environmental issues together with new policies of cost reduction, which involve not only capital costs but also operational costs, has led to a wider diffusion of the energy measurements practice down to the lower distribution levels.Īim of this tendency is to get to an optimal load management and to identify possible system inefficiencies.
0 kommentar(er)
