On a Viper recloser, what button do you press to turn on battery power for a de-energized line?

The correct choice is the "Wake-Up" button, which is specifically designed for turning on battery power in a Viper recloser that has stopped functioning due to a de-energized line. This button initiates the recloser's power system, allowing the device to perform its programmed functions again.

When dealing with equipment like the Viper recloser, understanding the correct sequence of operations is critical, especially in restoring functionality in emergency or de-energized situations. The "Wake-Up" function is essential as it ensures that the recloser becomes responsive and can start relaying necessary information or reset operations as needed.

Other options like "Activate," "Reset," and "Power On" may seem relevant but do not accurately describe the specific function for restoring battery power in a de-energized state. Each of these terms could refer to different actions in operating equipment but do not fulfill the specific requirement of activating the battery for the recloser. Hence, the "Wake-Up" button is uniquely suited for this task, emphasizing the importance of knowing your equipment's controls.