Application method of direct current (DC) monitoring device

The invention discloses an application method of a direct current (DC) monitoring device, which is realized by the following steps: (1) switching over all DC loads to a temporary switch-over screen, putting all loads of a station on a temporary charging device and a temporary accumulator cell group, wherein, in an original DC screen, except that a connecting terminal is electrified, other devicesare all out of running; (2) dismantling original monitoring equipment, an original insulated locator and an original insulation current mutual conductor on a feeder circuit, and dismantling all connecting wires among screens and the connecting wires of a control loop; (3) installing a new monitoring equipment, a new insulated locator and connecting wires of the two; (4) replacing a main fuse of accumulator cells into a DC air circuit breaker; replacing a main switch and section switches controlled by the main switch to enable the main switch and the section switches to meet range requirement; (5) testing and debugging