When coil voltage is supplied, the contacts of a solid-state on-delay relay change state when?

The correct response indicates that the contacts of a solid-state on-delay relay change state at the conclusion of a predetermined time period, labeled as time period T. In this type of relay, the function is to delay the activation of the relay contacts until a specific duration has elapsed after the coil voltage is applied.

This operational feature is essential in various applications where a delay is necessary, for instance, allowing other systems to stabilize or preventing immediate activation of equipment that could cause safety issues or operational inefficiencies. The "time period T" is predetermined during the relay's configuration and can often be set to comply with specific operational requirements.

In contrast to instant activation, which would occur immediately upon applying voltage, this relay's intended function is to purposely delay that activation to ensure processes or equipment operate smoothly and safely in synchronization with other operations. Thus, understanding the delay mechanism is key to employing this relay effectively in various electrical and automation systems.