Preparing to witness a multimegawatt motor and adjustable speed drive acceptance test–the basics

Abstract

Adjustable speed drive (ASD) and motors, if selected as a prime mover for compressors, pumps, extruders, etc. can provide various electro-mechanical benefits to its operators and stakeholders. Their benefits and application considerations have been well documented in past papers and tutorials. However, a successful installation of a multi-megawatt motor and ASD system requires detailed application, engineering, manufacturing, testing and installation considerations. Many times testing is requested by the operator and/or consultant, but navigating the types of tests available, test procedures, plans and how they comply with appropriate standards is often not fully understood. This can lead to surprises, shipment delays, price adders and ultimately the equipment itself not being in compliance with the stated project objectives. This paper attempts to address the factory acceptance testing (FAT) phase of a medium voltage motor and ASD system whether procured separately or as a package. Issues such as type of test selection, specifications, standards, preparation, acceptance criteria, and finally string testing will be covered. This paper serves as a guideline of how one can select, prepare, witness and sign off of a medium voltage motor and ASD test.