Maschinenfabrik Reinhausen GmbH (MR) is a world-leading manufacturer of on-load and off-circuit tap changers for power transformers. The company also provides plant equipment such as diverter switches, motor drive units, voltage regulating systems, supervisory equipment, oil filter units and monitoring solutions for on-load tap changers (OLTC).

MR offers services to manage, analyse, maintain, repair, and engineer transformers, as well as training and consultancy solutions. The company delivers premium services such as asset retrofitting, installation, commissioning, dry-out solutions, and moisture management.