In this article we will not be covering safety aspects. Safety in connections is based upon corporate rules and regulatory requirements which can change while this article is available. Please ensure that you are working in a safe manner whenever dealing with electrical connections. We will cover some concepts around how connections are made in…
Electrical and Mechanical Defects in an electrically driven machine have a direct impact on energy consumption. This can be from sub-standard maintenance practices, such as misalignment or belt tension, or degrading components such as bearings, belts, impellors, gears, and other parts. In this article we will discuss a simple motor/pump combination on a Variable Frequency…
This is example is long so that we can demonstrate the databases built into the EMPATH Electrical Signature Analysis software.
Low voltage and VFD driven electric motors will often have voltage stresses between conductors. In cases where this is severe, it is detectible as discharges in the airgap of the machine. In this paper we will review one of the applications associated with turn faults stresses in stator windings of induction. The discovery was originally…
The issues identified in this case study include a high 1X RPM which would be related to the misalignment found across the drive shaft from the motor to the gearbox. The peaks on either side of line frequency are at the output speed of the gearbox and the red arrows are indicators of blade issues. …
