What is the concept of equipment in electrical installation engineering?

First, the division principle of equipment and materials

1, equipment: after processing and manufacturing, composed of a variety of materials and components according to their respective uses of the unique structure, with function, capacity and energy transfer or conversion performance of machines, containers and other machinery, complete sets of devices are equipment. Equipment is divided into equipment that needs to be installed and equipment that does not need to be installed, stereotyped equipment and non-standard equipment. Equipment and its composition generally include the following: (1) stereotyped equipment (including general equipment and special equipment) : refers to the mass production and formation of a series of equipment according to the product standards stipulated by the state. (2) Non-standard equipment: refers to the country is not finalized, the use of small, non-mass production of special equipment, and by the design unit to provide manufacturing drawings, by the contractor or construction enterprises in the factory or construction site processing equipment. (3) the body of various equipment and the accessories, spare parts arrived with the equipment and the ladders, platforms, railings and pipes attached to the production of the equipment body; (4) Various instruments and meters attached to the equipment body; (5) Oils, chemicals, etc. attached to the equipment body.

2, materials: for the completion of construction, installation engineering required by the industrial processing of raw materials and in the process of production can not afford the unit process production of equipment outside the body parts, accessories, finished products, semi-finished products, etc., are materials. Materials generally include the following: (1) Platforms, ladders, railings and other metal components that are not part of the equipment supply and need to be processed or commissioned by the construction enterprise, as well as pipelines, pipe fittings, valves, flanges and so on that are supplied in the form of finished or semi-finished products; (2) Anti-corrosion, heat insulation and other materials required for construction and installation works.

Second, the main installation of professional equipment and materials demarcation lines

1. Electrical (1) All kinds of power transformers, transformers, voltage regulators, phase shifters, reactors, high voltage circuit breakers, high voltage fuses, high voltage isolation switches, device type air switches, power capacitors, batteries, AC and DC alarms, complete sets of box-type substations, common box busbars, sealed busbars, complete sets of supply boxes, trays, cabinets, screens and the busbars and supporting porcelain bottles brought with the equipment are The equipment. (2) All kinds of cable, wire, bus, pipe, steel, bridge, ladder, trough box, column, bracket, lamp, and its switch, socket, button, etc. are materials. (3) Low voltage switch, safety device, pole lightning arrester, all kinds of lightning rods, all kinds of insulators, fixtures, poles, iron towers, all kinds of supports are materials. (4) All kinds of small lighting distribution boxes mounted on the wall, 0.5 kVA lighting transformers, fans, iron switches, bell and other small electrical appliances are materials.

2, ventilation (1) refrigeration units, air conditioning units, air conditioners, all kinds of fans, dust removal equipment, fan coil, purification table, air shower, cooling tower, etc., are all equipment; (2) All kinds of air pipes, air valves, tuyere, hood, muffler and other components and pipe fittings are materials.

3, pipeline (1) nominal diameter of more than 300 mm valves, electric valves for equipment; (2) All kinds of pipes and pipe fittings, accessories, metal structural parts nominal diameter of 300 mm or less of the valve are materials; (3) Low-pressure appliances, sanitary appliances, heating appliances, self-made steel water tanks on site, and civil gas pipelines and accessories, appliances, cookware, etc., are all materials.

4, fire and safety equipment (1) in the fire extinguishing system: diaphragm pressure water tank (pressure tank) is the equipment; The foam generator in the foam fire extinguishing system, the proportional mixer is the equipment, and the rest are materials. (2) In the automatic fire alarm system: alarm controller, linkage controller, alarm linkage integrated machine, repeat display, remote controller, fire broadcast control cabinet, broadcast power amplifier, tape recorder, broadcast distributor, fire communication telephone exchange, fire alarm backup power supply, etc., are the equipment, and the rest are materials. (3) In security equipment: Alarm controller, alarm signal front-end transmission equipment, wireless alarm transmission equipment, alarm signal receiver, visual intercom host, controller, X-ray security inspection equipment, metal weapon detection door, camera equipment, monitor, lens, pannier, console, monitor cabinet, support controller, video switcher, full computer video switcher, audio, video, pulse distributor Video compensator, video transmission equipment, Chinese character generation equipment, video, recording equipment, power supply, CRT display terminal, analog disk, etc., the other are materials.

5, automatic control instrument (1) Complete supply of disk, box, cabinet, screen, incubator and host