Modular upgradable low voltage power supply

A modular power supply system, comprising:

• a) an enclosure;
• b) a casing assembly contained within said enclosure, said casing assembly including, a plurality of slots;
• wherein said casing assembly is configured to accept a plurality of transformer modules configured to slide into said slots, each of said transformer modules being of a type having:
• i. a transformer module housing having a handle;
• and,
• ii. a transformer element positioned within said transformer module housing, wherein said casing assembly includes a plurality of printed circuit boards including a controller printed circuit board (PCB), said controller PCB, comprising
• a plurality of PCB components, including:
• a) an MCU (Microcontroller Unit) configured to execute machine-readable program code for causing, when executed, a computer to perform selected steps;
• b) a relay operatively connected to said MCU, for shutting off the power to the transformer modules;
• c) at least two output current transformers (CT's) operatively connected to said MCU for measuring an output current of the modular power supply system;
• and,
• d) an input current transformer (CT) operatively connected to said MCU to measure an input current of the modular power supply system;
• and,
• a PCB mounted transformer operatively connected to said PCB components, said PCB mounted transformer having a high voltage AC input and a low voltage AC output, the low voltage AC output being converted to DC to power said PCB components,
• wherein said casing assembly, further comprises:
• a) a frame assembly comprising a plurality of panel elements;
• b) a plurality of spaced rails defining said plurality of slots, said spaced rails being supported by said panel elements;
• c) a plurality of terminal blocks supported by said panel elements;
• and,
• d) said plurality of printed circuit boards connected to said panel elements;
• wherein said plurality of printed circuit boards, comprises a connection PCB, said connection PCB, comprising a plurality of pluggable terminal sets operatively connected in parallel to each other, one of the sets providing inputs to the transformer module and the other set is to provide outputs to said terminal blocks, said controller PCB and said connection PCB being substantially perpendicular;
• wherein said parallel connected pluggable terminal sets provide the capability for the transformer modules to be easily added or removed from the modular power supply system to increase or decrease the power capacity thereof, thus the transformer element functions to power up a resistive or inductive load.