Photovoltaic grid-connected island protection device

The utility model discloses a photovoltaic grid-connected island protection device. Island field, the device is technically characterized in that the device is characterized by comprising a base, thesystem comprises a control chamber and an island protection device. The control chamber comprises a cavity; the island protection device is mounted on the bottom wall of the control chamber; a placingframe with an upward opening is arranged on the bottom wall of the cavity; through grooves are formed in the side walls of the placing frame; a plurality of hinge shafts are arranged around the bottom wall, close to the placing frame, of the control chamber; each hinge shaft is connected with a supporting plate abutting against the interior of the corresponding through groove, and each hinge shaft is provided with a torsional spring enabling the corresponding supporting plate to abut against the outer wall of the island protection device, so that the island protection device is more stable ininstallation mode in a con