Electronic Thermal Overload Relay Symbol

Relay symbols and electromagnets.

Electronic thermal overload relay symbol.

Most of the time a small voltage or current is used to switch other voltages or higher currents that may be electromechanical or fully electronic type. Available in svg png jpg dxf dwg formats. Olrs are used in combination with the contactors. Though there are different types of overload relays the most common type is the bimetallic thermal overload relay.

The wiring diagram of an overload relay is shown below and the connections of an overload relay symbol may seem like two opposite question marks otherwise like s symbol. The thermal and magnetic overload detections are typically used together in a motor protection relay. The relay are switching devices activated by signals. Overload trips symbols for use in electrical pneumatic and hydraulic schematic diagrams.

Citation needed electronic overload protection relays measure motor current and can estimate motor winding temperature using a thermal model of the motor armature system that can be set to provide more accurate motor protection. In a wiring diagram the symbol for overload contacts may look like two opposed question marks or an s. Overload relay connection diagram.