Electromagnetic Isolation Communication Rack Cabinet with Flexible
Size YH9002
Drawing of Electrical Parts Wiring Diagram
The wiring diagram is drawn according to the electrical principles
of the components and the layout of the electrical components. It
represents the connection relationship of the complete set of
devices and is the basis for electrical installation, maintenance,
and inspection of lines. The wiring diagram should be drawn
according to the following principles:
(1) The drawing of the phase diagram of the wiring diagram shall be
in accordance with the provisions of GB6988.6-1993 "Drawing of
functional diagram of control system";
(2) All electrical components and their leads shall be marked with
the text symbol and wiring number in accordance with the electrical
schematic. The preparation of the project code, terminal number and
conductor number in the schematic diagram shall comply with the
GB5094-1985 "Project Code in Electrical Technology" and GB4026-1992
"General Requirements for Identification and Application of
Alphanumeric Systems for Electrical Equipment Terminal Blocks and
Specific Wire Ends." "and" GB4884-1985 "insulated wire marking" and
other provisions;
(3) Unlike electrical schematics, the various parts of the same
electrical component (contacts, coils, etc.) must be drawn together
in the wiring diagram;
(4) Electrical wiring diagrams are always drawn with thin lines.
Two types of cabling are pre-board and post-board cabling.
Generally, the board is used for cabling. For simple electric
control components, the number of components is small and the
wiring relationship is not complicated. The connection between
components can be drawn directly. For complex parts, where the
number of electrical components is large and the wiring is more
complicated, generally the wiring slot is used. As long as the
connection number is marked on each electrical component, it is not
necessary to draw the connection between the components.
(5) The types, specifications, cross-sectional areas, and color
requirements of the various conductors used for the wiring shall be
marked in the wiring diagram;
(6) When parts and external circuits are connected, connectors for
large section conductors should be connected with the connectors.
Others should be connected via the terminal blocks.
In short, according to the above requirements, the sketch of the
outline of the electrical control cabinet should be drawn out, the
dimensions of each part should be estimated, and then the outline
drawing should be drawn according to the proportion, and further
consideration should be given to adjusting the proportions of the
dimensions in terms of symmetry, beauty, and ease of use. After the
appearance of the electrical control cabinet is determined, the
structural design of each part of the control cabinet shall be
carried out according to the above requirements, drawing the
assembly diagram of the cabinet and the parts drawings of each side
door, control panel, bottom plate, mounting bracket, trim strip,
etc., and indicate the processing requirements. Then choose the
appropriate door lock for the electrical control cabinet.
Finally, according to various drawings, we need to comprehensively
count the various parts and materials required by the electric
control cabinet, and list the summary list, standard parts list,
main material consumption quota table and auxiliary materials of
the purchased finished parts by category. Quota tables, etc., so
that procurement personnel, production management departments make
equipment preparation according to equipment needs, do a good job
in production preparation, and also facilitate cost accounting.
3 Cabinet installation and fixing
Cabinet installation is the basis for equipment installation and
must be installed in accordance with the standards.
(1) Before the cabinet is installed, check whether the exhaust
equipment of the cabinet is in good condition, whether the number
of equipment pallets is complete, and whether the pulleys and
support columns are in good condition.
(2) The cabinet model, specifications, and installation location
should meet the design requirements.
(3) The vertical deviation of the cabinet installation should not
exceed 3mm, and the horizontal error should not exceed 2mm. Several
cabinets shall be arranged side by side. The panels shall be on the
same plane and parallel to the reference line. The deviation before
and after shall not be greater than 3mm; the gap between two
cabinets shall not be greater than 3mm. For devices arranged at a
certain distance from each other and arranged in a row, the front
and rear panel deviation shall not be greater than 5mm;
(4) The various parts of the cabinet must not fall off or break. If
the paint is peeled off, it should be pre-painted. The signs should
be complete and clear;
(5) When the cabinet installation should be firm and there are
seismic requirements, reinforce according to the seismic design of
the construction drawing;
(6) The cabinet should not be directly installed on the raised
floor. The base should be made according to the size of the bottom
plane of the equipment. The base should be fixed directly to the
ground, the cabinet should be fixed on the base, and then the
movable floor should be laid;
(7) The thickness of the channel steel in the cabinet base is not
less than 50 mm. The grounding is good. The channel steel is fixed
on the floor of the equipment room through the expansion bolts and
interconnected with the grounding copper bar;
(8) The channel steel and the cabinet are connected stably by means
of welding. There must be no black welding paint on the cabinet. It
must be aesthetically appropriate.
(9) After the cabinet is fixed, ensure that the front, rear, left,
and right cannot be pushed to ensure the stability of the cabinet.
(10) If the floor around the cabinet needs to be cut, use a cutting
machine to cut it smoothly and remove burrs to prevent it from
being cut.
(11) Install the cabinet panel and reserve 800mm space before the
rack. The distance between the back of the cabinet and the wall
should be more than 600mm to facilitate installation and
construction;
(12) The wall-mounted cabinet should be 1200mm from the ground;
(13) The installation of equipment and components in the cabinet
shall be performed after the cabinet is positioned and fixed, and
the equipment installed in the cabinet shall be securely mounted.
(14) The fixing screws, washers and spring washers on the cabinet
shall be fastened as required and shall not be missed;
(15) The hanging wall-mounted installation shall be installed on a
flat and firm wall, at least 300mm from the ground, and shall be
kept horizontal and vertical to the wall, and the vertical
deviation shall be less than 3mm.
(16) Holes in the wall shall be protected from damaging the inner
wall of the wall. The depth of the hole shall not be less than
70mm. The number of expansion screws used for fixing the cabinet
shall not be less than 4 (6 for the suspended C-type cabinet). If
necessary, support should be placed under the cabinet to ensure the
safety and stability of the cabinet.
(17) For floor-mounted cabinet installation, consider the direction
of opening of the cabinet and ease of operation when installing the
pedestal, giving priority to the door opening direction of the
wiring compartment. Equipment doors and wiring door must be fully
open.
(18) The cabinet must be protected against lightning grounding.
(19) The cabinet should be properly marked after installation. The
logo should be uniform, clear and beautiful. After the chassis is
installed, the holes in the cabinet cables should be sealed with
fireproofing clay. Do a good job of preventing rats, insects, water
and moisture.
4 Cabling
4.1.1 Cabinet Power Arrangement
The cabinet shall be equipped with a set of detachable and
replaceable fixed power distribution units (PDUs) for the
introduction, distribution, protection, division, and connection
(outlet or terminal) of cabinet equipment power. In the same
cabinet, AC power distribution and DC power distribution should not
be mixed (except for fan cooling fan power distribution).
4.1.2 Structure and Installation Requirements
The power distribution unit recommends the use of a vertical
strip-shaped integrated structure that integrates power
distribution, protection, and patching, and its front side is
removable, making it easy to install and replace patch modules and
connectors (wiring); The introduction, distribution, protection and
separation of the separate part of the plug-in part of the
structure, in which the introduction of power, distribution,
protection part of the equipment at the top or bottom of the power
distribution unit, and the plug-in part is still a vertical bar
unit structure. The installation position of the vertical bar-type
integrated power distribution unit or split-unit plug-in unit is
generally the rear side of the cabinet (power cable tie bar or
outside of the cable channel). In special cases, there may be one
power distribution unit on the left and right sides (not
recommended).
4.1.3 AC power distribution unit
A. The power distribution unit should be able to introduce both A
and B dual power supplies at the same time. They should be
completely independent of each other (including the grounding wire)
and be separately powered. For cabinets without dual-channel power
supply requirements, only one power supply can be introduced.
B. The input power of the power distribution unit generally uses a
single-phase three-wire power supply (220V). In special cases, a
three-phase four-wire power supply (380V) can be used. It also can
be visualized with special requirements for power supply safety,
using four-way power supply introduction.
C. The input terminal of the power supply should be equipped with a
terminal group, which can connect cables below 16 mm2, and can
install current metering devices as required. Each output branch
should be provided with a terminal group or socket to provide the
equipment with electrical conditions.
D. An independent over-current and short-circuit protection device
shall be provided for the power input of the cabinet, and an
independent over-current and short-circuit protection device shall
be provided for each output branch.
E. The protection device can use AC air switch (recommended) or
fuse switch-disconnector, installed on the phase line of the total
input or output shunt to facilitate operation and replacement, and
meet the heat dissipation requirements. The rating of the
protection device should be consistent with The total input or
output shunt rating matches.
——If air switch is selected, it shall comply with the requirements
of GB 10963.1 and the instantaneous tripping mode shall be C type
(trip range >5 In ~ 10 In).
—— If fuse switch is selected, it shall comply with the
requirements of GB 14048.3, in which the fuse shall meet the
relevant requirements of GB/T 13539.5, and the range and use
category shall be gG type.
