Dear Sir,
There is an electrical panel that converts the DC voltage from the battery to 110 volts DC and sends it to the tripping device. 110 volts is converted through the panel in the picture below.

In the figure below, the tripping devices of 33 kV high voltage line are operational at 110 voltage. It is very important to keep the tripping device functional on high voltage lines.

Thank you so much for reading my post and leaving a nice comment.