The Eaton Power Quality P-105000088-003 is an external maintenance bypass switch (External Maintenance Bypass Switch, MBS), specifically designed for single-phase UPS systems with a power rating up to 15 kW. It enables safe and uninterrupted load diversion during maintenance or system failures, ensuring operational continuity for critical equipment. The version with BIS (Bypass Isolation Switch) provides additional safety through phase-independent isolation and prevents unwanted backfeed into the network. When used as an accessory for three-phase UPS systems, the MBS offers a reliable solution for deployment in data centers, industrial facilities, or other critical infrastructures where high availability and ease of maintenance are required.

The device is housed in a robust, freestanding enclosure with dimensions of 506 mm (width) × 514 mm (height) × 275 mm (depth) and is finished in black. The freestanding mounting allows for flexible installation within existing infrastructures. With CE certification, compliance with European safety and environmental standards is guaranteed. The product is manufactured in Finland (FI), indicating high-quality production.