WEG RW27-2D2-U010 Adjustable Thermal Overload Relay

The WEG RW27-2D2-U010 Adjustable Thermal Overload Relay provides precise, adjustable motor overload protection and phase loss protection for industrial motor control and automation systems. It is designed for direct mounting on WEG CWB contactors (models CWB9 through CWB38) and is commonly used in motor starters across manufacturing facilities, conveyor systems, pumping stations, HVAC equipment, and industrial control panels where reliable protection is required. Key specifications include a 2-pole design with an adjustable current range of 7–10 A, bi-metallic thermal overload protection, and Class 10 trip performance. The relay features one normally open and one normally closed isolated auxiliary contact, and a reset that is selectable as manual or automatic. Phase protection includes phase loss and current unbalance detection, helping prevent motor damage from abnormal power conditions. Electrical ratings include insulation voltage up to 690 V, impulse withstand voltage of 6 kV, and a rated operational frequency of 25–400 Hz. Housing terminals are IP10 for the main terminals and IP20 for the auxiliary contacts, and the unit is rated for industrial duty use in motor control centers and automation panels. Common applications include pumps, fans, compressors, conveyors, and other industrial machinery where dependable motor protection is essential.