Vital relay assembly for modular solid-state current-limiting

A method of providing a modular solid-state current-limiting via a relay assembly, the method comprising:

• providing a vital relay used in a vital circuit and configured to be rack-installed in an equipment room in a wayside case or a housing;
• providing a plurality of vital relay contacts to which a current flow is restricted by a single supply solid-state current limiter;
• providing a relay socket base assembly coupled to the vital relay, the relay socket base assembly including:
• a relay socket base including a plurality of vital relay contact prongs,
• a plug assembly including a plurality of printed circuit board (PCB) mounted contact terminals, and
• a plurality of contact terminals that provide a connection between the plurality of vital relay contact prongs and the plurality of printed circuit board (PCB) mounted contact terminals;
• and
• providing an ancillary electrical control module, wherein the relay socket base including:
• a plugboard, and
• a contact terminal receptacle, wherein the relay socket base assembly includes a plurality of insulators that separate the plurality of contact terminals, wedges the plurality of contact terminals against the plurality of vital relay contact prongs and secures the contact terminal receptacle to the plugboard of the relay socket base, wherein each insulator of the plurality of insulators comprise a socket insert terminal holder and a snap lock feature.