DISPOSITIVO DI ALIMENTAZIONE E PROTEZIONE DI UN COMPRESSORE ERMETICO DI UNA MACCHINA FRIGORIFERA, DISPOSITIVO PER IL COLLEGAMENTO DI

The metal casing (10) of a hermetic compressor is provided with a metal plate (14) which includes a projecting apertured lug (34). An electrical unit is attached to the plate (14) which includes an insulating support body (26) and an insulating earth-connector body (36) separate from the preceding body. The insulating support body (26) includes a protection switch (30) and a resistor having a positive temperature coefficient (PTC). The insulating earth-connector body (36) includes a seat (38) for receiving the lug (34), at least one portion acting as a cable clamp (72,74) and an apertured attachment wall (48) which delimits the seat (38) and flanks the lug (34). A shaped metal element (40) is held in the insulating body (36) which includes an apertured blade-like portion (44) and terminal earthing portions (46) for various electrical components of the refrigeration machine. A metal member such as a screw (64) passes through the holes of the lug (34), the attachment wall (48), the blade-like portion (44) and an end terminal of an earth conductor of a supply cable, for fixing them together.