The utility model discloses a
photovoltaic power generation grid-connected protection device, and relates to the technical field of
photovoltaic power generation. The high-low-
voltage photovoltaic grid-connected cabinet comprises a high-low-
voltage photovoltaic grid-connected cabinet body, a main
circuit breaker and a plurality of
branch switches are fixedly arranged in the high-low-
voltage photovoltaic grid-connected cabinet body, the main
circuit breaker is electrically connected with the
branch switches, and the
branch switches are all connected with external wires. And the main
circuit breaker and the branch switch are used for controlling the on-off of the circuit. According to the
photovoltaic power generation grid-connected protection device, through the synergistic effect of the moving
assembly and the elastic mechanism, the
wire rod forms a dynamic redundant structure,
thermal expansion and cold contraction deformation can be automatically compensated, the redundant length is released during external pulling, and damage to a connection point can be avoided; the rubber pressing plate and the abutting plate form a graded fixing
system, flexible pressing and rigid clamping are carried out on the bent part and the root part respectively, and it can be ensured that the wire connecting point is not prone to being affected when the redundant section moves.