• modernization of electrical machines’ ventilation system;
• changing and modernization of motor terminal location;
• setting up a vibration monitoring and warmth control stationary systems of bearing blocks and wraps;
• other changes in units’ construction, allowed in specification documents and national standards of Russian Federation and approved by the customer;
• vertical-shaft electrical machines bearing assemblies’ modernization;
• pressure breakdown labyrinth replacement to new modernized with floating rings.