The invention relates to a combined low-
voltage switch cabinet and a working method thereof. The combined low-
voltage switch cabinet is characterized by consisting of a cabinet body of the switch cabinet, an upper ventilation plate, a lower ventilation plate, a
bus, an instrument, a cable and a unit room with a functional switch circuit. The working method comprises the steps of: 1) the installation of the cabinet body, 2) the selection of a circuit proposal, 3) the
internal connection of the switch cabinet, 4) the
external connection of the switch cabinet, 5) the running of the switch cabinet and 6) the operation of a user. The invention has the advantages of compact structure, ability of saving the volume of the cabinet body, strong seriation and universality, high breaking ability, good dynamic
thermal stability, advanced and reasonable structure, economic
layout of a power distribution circuit and arbitrary combination of various proposals and units; a functional unit adopts a fixed structure, thereby facilitating the safe running, facilitating the overhaul, shortening the accident power outage time and ensuring the reliable power use; an electrical appliance element can select a domestic element or an imported element arbitrarily according to the different user demands, thereby being capable of meeting the market demands to the maximum extent; furthermore, the combined low-
voltage switch cabinet has beautiful appearance, high protection level, high operation continuity and reliability and convenient installation and maintenance.