Integrated fault monitoring apparatus for electrical equipment

An internal fault detector for detecting transient pressure surges within an electrical device, the internal fault detector comprising a housing, wherein the internal fault detector comprises:

• a two-bar self-locking linkage;
• a pressure sensing member adapted to convert a transient pressure surge within the electrical device to translational movement, the pressure sensing member being operatively disposed to move the two-bar self-locking linkage from an armed configuration in which the two-bar self-locking linkage is rigid to a triggered configuration in which the two-bar self-locking linkage is rotatable about a central rotation point of the linkage upon the occurrence of a transient pressure surge;
• and
• an indicator adapted to provide a signal in response to movement of the two-bar self-locking linkage from the armed configuration to the triggered configuration.