Siemens LRD22 Thermal Overload Relay

The Thermal Overload Relay, also known as overload protection relay, motor protection relay or thermal protection relay, with type number LRD22 from Siemens is an electrical protection device for power contactors. It serves to protect electric motors from overheating and overload by monitoring the flowing current and switching off when a limit value is exceeded. It has the dimensions 12 x 5.5 x 15 cm and weighs 0.13 kg. This relay is specifically designed for use with power contactors of the LC.D series or with the LAD7 adapter. Thermal overload relays are used in industrial electronics and automation technology to ensure the operational safety of electric motors in applications such as pumps, fans, compressors and conveyor systems and to prevent damage due to overcurrent.

Thermal overload relay for contactors LC.D or with adapter LAD7