Product Description
The LR44/3 is a logic-based monitoring and load-balancing relay used in industrial automation systems to control and alternate operation between multiple loads such as pumps, compressors, and motors. Despite the “voltage monitoring relay” name, it does not measure battery-type voltage (like LR44 cells). Instead, it monitors external control contacts and switching logic.
It ensures equal running time between equipment by automatically rotating outputs, improving efficiency and extending equipment life.
Key Features
• Logic control relay for load sharing and alternation
• Monitors 3 external voltage-free N.O. contacts
• 3 x SPNO output relays for load switching
• Automatic rotation of outputs on each activation cycle
• “Help” function allows additional outputs to energize when needed
• Wide auxiliary supply range: 100–230V AC/DC
• DIN rail mounted (compact 44 mm housing)
• LED indicators for power and relay status
• Microprocessor-based control logic
• Designed for motors, pumps, compressors, and industrial systems
• Fast response switching (~50 ms)
• High reliability industrial design
Specifications
• Product Type: Logic / Monitoring Relay
• Model: LR44/3
• Manufacturer: Broyce Control
• Supply Voltage (Auxiliary): 100–230V AC/DC
• Input Type: 3 × voltage-free N.O. contacts
• Output Contacts: 3 × SPNO
• Contact Rating: 5A @ 250V AC
• Mounting Type: DIN Rail (44 mm width)
• Switching Time: ~50 ms
• Operating Temperature: -20°C to +60°C
• Enclosure Dimensions: Approx. 44 × 85 × 63.5 mm
• Power Consumption: ~3 VA
• Protection Category: Industrial control panel use
• Application: Pump control, motor alternation, compressor sequencing, automation systems

