Insert Thermal Relay

This tool automatically draws a Thermal Relay (THR) symbol on a line, which is a key component in electrical sequence drawings.

Sequence Context

This tool is part of the electrical symbol series, following the updated direction　selection method (click along the line).

Symbol Scaling

On the first run, you set the　insertion scale (e.g., input 1 for a 3mm circle diameter). You can adjust this later using the FAC command.

(First Run Only) Enter the Symbol　Insertion Scale (e.g., 1 for 3mm).

The Thermal Relay symbol is automatically drawn at the　selected location.

1. 1.Type THR in the command line and press Enter.
2. 2.Select the Line where the symbol will be　inserted.
3. 3.Click a point along the line to define the Direction (Up/Down or Left/Right).