---
title: AN-TMR-025 - Star-Delta Start Relay
description: Understanding and Selecting Timers
---

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# AN-TMR-025 - Star-Delta Start Relay

## Timing operation of the Star-Delta Start Relay function

AN-TMR-025

25\. Star-Delta Start Relay Function:

The star-delta relay function turns on output 1 to energize the star wiring contactor. After the preset time of T1, output one turns off and timer T2 starts. When T2 completes, output two turns on to energize the delta wiring contactor.

 

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