scope:

1. SCOPE

1.This Standard outlines the requirements for time delay relays which are used in "On Delay" and "Off Delay" applications. Approved sources shall supply time delay relays to accomplish the following: a) ON Delay b) OFF Delay C) ON Delay with Instantaneous Contacts d) OFF Delay with Instantaneous Contacts Time delay relays should be available either in models which are convertible from ON to OFF delay and vice versa, or in the four models listed above. If convertible the means of conversion should not be readily accessible.