Littelfuse Introduces Motor Protection Relays with Wireless Monitoring

Littelfuse Inc., introduced a next-generation motor-protection relay designed to enhance worker safety while allowing for faster, easier control and troubleshooting. The MP8000/MP8100 Series Bluetooth-Enabled Motor Protection Relay allows maintenance personnel to communicate with the relay from up to 30 ft. away using a mobile app.

It is the first fully programmable motor overload relay to offer integrated Bluetooth capabilities; earlier types required the purchase and installation of separate Bluetooth modules.

“The MP8000/MP8100 relay represents a revolutionary advance for both motor protection and safety. Littelfuse is proud to have been a part of developing this important safety enhancement technology,” said Charles Newcomb, product manager, Industrial Business Unit, Littelfuse.

A worker can set up the relay, view real-time data and troubleshoot fault codes while the panel door remains closed to minimize potential shock and arc-flash hazards, helping to create a greater level of safety.

Bluetooth communication provides a number of conveniences that improve productivity. Users save time by leaving their personal protective equipment in their locker. Motors are easier to troubleshoot when workers can stand nearby the motor, instead of next to the relay located at a distance up to 30 ft. away.

Once a smartphone is securely paired with the relay, a worker can easily monitor system status in real time, set up the relay, adjust its settings, and review its fault history. Instead of turning knobs and scrolling through menus on a small display, workers can use a smartphone interface to interact with the relay. The app is intuitive and requires no training to use. The Littelfuse MP8000 App is available on the Apple App Store and Google Play.

Applications for the MP8000/MP8100 relay include conveyor systems, HVAC equipment, saws and grinders, fan motors, and pumps employed in manufacturing, oil and gas, water/wastewater and mines.

The MP8000/MP8100 relay combines the tools necessary to monitor motor overload, voltage, phase loss and reversal, voltage and current unbalance, power monitoring, and underload in one package.

The MP8000/MP8100 relay protects any motor drawing 0.5–100 full-load amps (currents higher than 100 amps require external current transformers). It is designed for single- or three-phase systems with operating voltages of 90–690 VAC. Although the Bluetooth interface can be used when paired with a smartphone or tablet, the MP8000/MP8100 also features an Ethernet port that can connect to a PC or SCADA system, and supports data logging through a PC with optional LFS-MP8000 software. The MP8000 and MP8100 both offer remote wired communication via Ethernet Modbus TCP/IP; the MP8100 also enables communication via RS-485 and CAN bus interfaces.

Littelfuse,, 800-832-3873