Wmns Low Voltage Power Distribution Box

WMNS Low Voltage power Distribution Box
User's manual
I. General
1.1 WMNS is modularized, multi-functional low voltage distribution switchgear, which is applicable to metallurgy, petroleum, chemical industrial, industrial and mining enterprises and all the situations high reliable low voltage system, distribution system and motor control system are needed.
1.2 The structure of the cabinet body of WMNS has high flexibility.
The elements of many types and specifications can be installed in the cabinet according to your requirements or different using situations.
The polytype feeder units can be installed in the same list of the cabinet or in the same cabinet according to different electricity equipments. E.g.: the feeding loop and the motor control loop can be wired together.
1.3 WMNS series low voltage switchgear can meet your need completely. It is applicable to all low voltage systems of the current 4000A or below.
1.4 WMNS can supply you high level reliability and safety. Its humanized design enhances the protection both for the human body and for the equipments.
1.5 WMNS is full assembly structure, whose special sectional material and the connection mode as well as the compatibility with the elements can meet the requirements from the working period and the continuity of the power supply.
1.6 Execution standard:IEC60439-1, GB7251.1.

II. Type meanings
W    M    N    S  --
                                
Auxiliary loop scheme no.
                                   Main loop scheme no
                                   Distribution element
                                   Low voltage
Modular
                                   Worldwide Group

III. Main technical parameters
3.1 environmental temperature:-5ºC~40ºC;
3.2 relative humidity ≤50% when the highest temperature is +40ºC; A higher humidity is allowable if the temperature is lower, e.g.: 90% when 20ºC;
3.3 height above sea level≤2000m;
3.4 Inlet and outlet: cables/bus bar bridge;
3.5 cable inlet and outlet: roof/bottom;
3.6 wiring mode: front/back;
3.7 protection degree of the shell: IP30;
3.8 Functional unit isolating mode: completely or partly;
3.9 cabinet height:2200;
3.10 cabinet width:600, 800, 1000;
3.11 cabinet depth:800, 1000;
3.12 rated working voltage:to AC660V;                                                               
3.13 rated insulating voltage:to AC1000V;                                                               
3.14 over voltage kind: IV;                                                                 
3.15 pollution degree: 3;
3.16 rated frequency:50/60Hz;                                                           
3.17 auxiliary loop rated voltage:AC380, 220V/DC220V;
3.18 rated current:4000A;
3.19 rated current of the horizontal bus bar:4000A;
3.20 rated current of the vertical bus bar:2000, 1000A;
3.21 rated short time tolerance current of the horizontal bus bar:50/80kA;
3.22 rated peak tolerance current of the horizontal bus bar:105/176kA;
3.23 rated short time tolerance current of the vertical bus bar:50kA;
3.24 rated peak tolerance current of the vertical bus bar:105kA;
3.25 grounding system:TT, IT, TN-S, TN-C-S;             

IV. The main features
4.1 For good installation and onsite construction for the equipments, special cable channels with attached corresponding cable fixing units are set in the distribution cabinet.
4.2 Each position of the drawer unit is with accurate location and clear indication. Besides, each position is respectively locked by 3 locks at the most.
4.3 The drawer unit is connected to "L" type vertical bus bar flexibly, which is easy and reliable.
4.4 The special sectional material and the connection mode ensure the strength of the cabinet body.

V. Structure and features
5. 1 Area division of the distribution cabinet
According to different function of the area, the distribution cabinet can be divided into 4 separated isolating rooms.
5.1.1 Horizontal bus room (on the roof or at the bottom of the cabinet).
5.1.2 Vertical bus room (left side at the cabinet back). It is a "L" type bus bar which is in a totally-enclosed function board. The dynamic stability of the bus bar is ensured and the protection degree of the hot-line parts can up to IP20 after the drawer is drawn out.
5.1.3 Functional unit room (left side in front of the cabinet). Drawer unit or fixed separated unit
5.1.4 Cable room (light side in front of the cabinet when front outlet; left side in front of the cabinet when back outlet).
5.2 The frame
5.2.1 The frame of the cabinet selects tee bend connection of special C sectional material (modulus is 25mm), which is assembled after fastened by locking screws and high strength screws. Three are many specifications and dimensions of the sectional materials. Different frame can be assembled according to different cabinet type and actual requirements.
5.2.2 The cabinet body is made of cold rolled steel and import A-zinc alloy plates.
5.3 The shell
Many kinds of protection boards can be added to the frame according to the cabinet structure and the actual requirements.
5.3.1 Cabinet front (transparent glass door, ordinary door plate, withdrawable panel, ventilation door).
5.3.2 Cabinet back(back open, sealing board at the back of the cabinet installed by the wall, fixed by the screws directly).
5.3.3 Cabinet side: the side board fixed by the screws.
5.3.4 The roof of the cabinet: roof cover (with ventilation holes, match respective bushing according to the cable size when wiring).
5.3.5 The bottom of the cabinet: bottom covers (match respective bushing according to the cable size).
5.3.6 There are integrated isolating boards among the cabinets.
5.4 assembly type of the cabinets
5.4.1 The drawer cabinet(MCC)
The drawer cabinet is composed of the drawers, cabinet frame and the relative components. All the elements are fixing installed in the drawers. There are five specifications of the drawers: 8E/4, 8E/2, 8E, 16E, 24E(E=25mm). The drawers with the same specifications can exchange with each other.
The rated current of the drawer is up to 630A. Single equipment can match nine 8E drawers and there are 36 loops (8E/4) at the most.
It is mainly applicable to the control loop of the main motor or used for power distribution.
5.4.2 The fixed cabinet
This kind of cabinet is mainly used for inlet cabinet, contact cabinet, capacity compensator, frequency controller and soft starter.
5.4.3 The mix cabinet
The drawer unit and the fixed unit can be mixed assembled in one cabinet. 8E is a unit according to the module. It is applicable to the situation that the distribution loop and the motor control loop both exist.
5.4.4 The fixed isolating cabinet
Each loop unit are isolating with each other. Plug circuit breaker or withdrawable circuit breaker is adopted for the convenient of the maintenance and inspection. It is mainly applicable to the distribution loop or the control loop of the motor of large power.
5.5 The horizontal bus bar
5.5.1 The horizontal bus bar of the switchgear is arranged in the horizontal bus bar isolating room, which can be arranged at the cabinet back or on the roof.
5.5.2 There can be the upper and lower layer when the horizontal bus bar is arranged at the cabinet back.
5.6 The vertical bus bar
5.6.1 The vertical bus bar is arranged in the vertical bus bar room, which is used for the connection between the functional unit and the main bus bar. It is "L" shape right-angle copper, which can be installed in the special multi-function board of three-phase or four-phase.
5.6.2 The protection is up to IP20 after the drawer unit is taken out.
5.7 The protection conductor
5.7.1 The protection conductor is used for the equipotential connection of the frame. It is composed of the horizontal and vertical conductor inside the cabinet. The vertical conductor is used for the connection between the cable protective conductor and the earth line.
5.7.2 The section of the protective conductor is made of the standard copper line with the relative specification according to the actual current.
5.8 The small control bus bar
5.8.1 The small control bus bar is used for the power supply of the entire control loop, some communication equipments and the field bus.
5.8.2 The small control bus bar can be arranged in the special isolating room, which can be wired throughout the entire system according to the requirement.
5.9 The cable room
5.9.1 The cable room is the special channel of the wiring of the power cables and the control cables, which is in an isolating room in front of or at the back of the cabinet.
5.9.2 There are special primary and secondary wiring terminals and the relative cable built-in fittings.
5.9.3 There are cable outlet bushing on the bottom cover and the roof cover according to the actual cable size and the inlet and outlet wiring mode.
5.9.4 The cable room can be enlarged or minified as the relative module according to the requirements from the user.

VI. The functional unit
6.1 The withdrawable functional unit
6.1.1The drawer is composed of the functional units including some mechanical mechanisms which ensure that the drawers have the positions like connection, test, separating and move out position. Different position can be locked by the padlock. Meanwhile, the monitoring, control and human to machine interface can be integrated on the front panel.
6.1.2 Locate the drawer accurately in connection, test, separating and move out positions by the operation handle or large interlock. Each position has a relative label which is easy and visual on the front panel.
6.1.3 When the circuit breaker switches on, the mechanical interlock prevents the drawer from moving to ensure the safety of the drawer.
6.1.4 In the operation process, the panel of the drawer may be needed to open because of the setting or inspection, and the relative unlocking tools can be used.
6.1.5 Each drawer unit is completely independent; the drawers are completely isolated.
6.1.6 The drawer units of the same specification can exchange flexibly.
6.1.7 The outlet side and the fixed patchboard are connected directly. The secondary wiring selects special secondary plug-in board for the connection (the unit of the secondary plug-in board 8E/4 is 16-cord for the most and 32-cord for 8E/2 or above).
6.1.8 Each drawer unit of each specification has a relative inlet/outlet guide track and a roller wheel which guides the inlet/outlet and the location. The roller wheel can save operation strength.
6.1.9 The special three-sectional guide track can not only make the drawer move flexibly, but also make the inspection and maintenance allowable when the drawer is in the frame.
6.1.10 A pushing mechanism can be added to the drawer of one unit or above according to the height of the unit or the loop current.
6.1.11 The drawer unit is applicable especially to the control loop of the motor. It is optional according to the function and the actual need for the distribution loop.
6.2 The fixed separate functional unit
6.2.1 This kind functional unit not only keeps the advantage of easy operation of the fixed unit, but also has the features of clear separation and reliable isolation of the drawer unit. It is applicable to the distribution loop and the control loop of the motor.
6.2.2 The plug-in elements can be taken out for maintenance. It is unnecessary to power off when replace it. When inspect the equipment, take out the relative loop unit and the entire distribution system and other loops will not be effected.
6.2.3 The interlocks between the operation mechanism and the rolling handle on the panel make the door cannot open when the circuit breaker switched on, which ensure the safety of the equipment.
6.2.4 When the equipment is operating, if the setting or inspection of the inner elements is necessary, open the panel by the relative unlocking tools.
6.3 The isolating withdrawable unit
6.3.1 The equipment is installed on a drawer basis which has operation, test, open and taken out positions. There are relative state label in each position which can be located.
6.3.2 There are relative position changed indicating in front of the switch when the position changes. The protection degree of each position keeps IP20.
6.3.3 This scheme simplifies the maintenance of the equipment of large power, which is applicable to inlet, contact and distribution loops.

VII. Installation dimension
7.1 The fixed cabinet:
width:600mm, 800mm, 1000mm
depth:600mm, 800mm, 1000mm
7.2 The withdrawable cabinet:
width:600mm, 800mm, 900mm, 1000mm(600mm not suggested)
depth:600mm, 800mm, 1000mm(600mm not suggested)
7.3 The fixed isolating cabinet
width:600mm, 900mm, 1000mm
depth:600mm, 800mm, 1000mm

VIII. Arrangement and combination of the primary scheme
8.1 The total height of the functional unit is 72E, that is, 1800mm.
8.2 In the same equipment, the small functional unit is at the upper side and the large functional unit is at the lower side.
8.3 Four 8E/4 drawers compose one 8E installation unit; two 8E/2 drawers compose one 8E installation unit; two 8E/4 drawers and one 8E/2 drawer compose one 8E installation unit.
8.4 The current transformer drawn in the scheme is the max. Installation quantity (scheme 01-19,21-39,one current transformer can be added to the reactive power compensation loop). For actual usage, reduce the current transformer or don't install it according to the need of the system.
8.5 The depth of the equipment is 600mm(MCC single side operation)or 1000mm(PC and MCC double sides operation). Suggest separately paralleling using PC and MCC. When use breaking functional board, the mix installation of PC and MCC in the same cabinet is allowable.
8.6 when PC and MCC are arranged adjacently:
8.6.1 When MCC double sides' cabinet (or MCC single cabinet of the depth 600) and PC cabinet are arranged adjacently, transfer cabinet (the width is 400mm) has to be added between the two cabinets.
8.6.2 When single side MCC is deepen to 1000mm, it is unnecessary to add transfer cabinet.

IX. Operation descriptions
9.1 8E/4,8E/2 withdrawable units
Operating position: the main switch switches on; the control loop is on; units locked
Switching off position: the main switch is open; the control loop is on; units locked
Test position: the main switch closed, the control loop is on, units locked.
Draw-out position: the main loop and the control loop are all off
Isolating position: 30mm draw-out distance, the main loop and the control loop are all off, isolating finishes
9.2 8E,12E,16E,20E,24E draw-out units:
Operation position: the main switch switches on; the control loop is on, units locked.
Switching off position: the main switch open, the control loop is on, units locked
Test position: the main switch switches off, the control loop is on, units locked, and three locks can be added
Isolating position: 30mm draw-out distance, the main loop and the control loop are all off, isolating finishes, three locks can be added
Draw-out position-the main loop and the control loop are all off
9.3 withdrawable MCC operation:
9.3.1 The drawer can't be pushed into the cabinet until guide units are inserted correctly into the bottom of the drawer. Otherwise, the damage of the drawer may happen or the drawer may not be taken out.
9.3.2 The functions of the signals on the drawer panel of 8E/4and 8E/2 are shown on the above figure. The meaning of the arrow from open position "O" to operation position "I" is: push the operation handle first, and then turn the handle from "O" to "I". No push for return. Turn the handle from "I" to "O" and then release it.
9.3.3 The functions of the signals on the drawer panel of 8E~24E drawers are shown on the above figure. When the handle is in "I" position, the mechanism unlocks the mechanical block of the main switch which can switch on/off at this time. But, when the main switch switches on, the handle of the interlock will not operate.
9.3.4 A little plastic cover is at the right lower side of the signal label, which is the unlocking mechanism of the door. Below is the operation process: when the drawer is in operation position, if open the door, pull out the little cover first, and then use a switch driver to insert to the holes and down move the lock catch to open the door. Do return the little cover to where it was after closing the door, otherwise, the initial protection degree will be damaged.

X. Installation and fixing
After the product arrives in the receiving place, inspect if there is any damage before unpacking. Inform the relative department to do business record. Analyse the reasons together. For the product that immediate installation is unnecessary, place it in a proper place according to the relative requirement and take a good care of it.
10.1 Install the product as the installation schematic diagram (see the attached fig.). The screws used for the fixing of the channel steel are prepared by the user. When connect the main bus bars, make sure that they are flat.
10.2 When the equipment is installed singly or in a line, the verticality, unevenness of the cabinet boards and the gap deviation between the cabinets shall be in accordance with the below table:
10.3 The inspection and test before operation
10.3.1 Inspect if there is any damage of the cabinet coat and the cover materials, and if the internal side of the cabinet is dry and clear.
10.3.2 Inspect if the operation mechanism is flexibly. There shall be no block or hard operation.
10.3.3 If the switching on/off of the main and auxiliary contacts are reliable and accurate.
10.3.4 The drawers and the withdrawable mechanism shall be flexible without block or bump.
10.3.5 The static or dynamic contacts of the drawer or the withdrawable mechanism shall be in one line. The depth of the inserting of the main and auxiliary contacts shall be in accordance with the requirements.
10.3.6 The drawers of the same size can exchange with each other without block or bump.
10.3.7 The grounding contacts between the drawer and the cabinet shall connect closely. When the drawer is pushed in, the grounding contact of the drawer shall contact before the main contact. When the drawer is taken out, the grounding contact shall break after the main contact.
10.3.8 The setting of the scale of the instruments, the variety scale of the mutual inductor and the poles shall be correct.
10.3.9 The fuse specification shall in accordance with the requirement of the engineering design.
10.3.10 The rated value of the protection and the setting shall be correct and the operation shall be reliable.
10.3.11 The value of the insulating resistance shall not lower than 1 MΩ measured by 1000 megohm-meter.
10.3.12 The connection of the bus bar shall be good. The installation of the insulating support, the installation units and the accessories shall be reliable.

XI. Primary schematic diagrams




XII.Precautions
No need to install it by the wall. Operate in the front and maintain it at double sides. Only the trained and qualified professionals can enter the cabinet or open the cabinet door to operate, inspect and maintain it.
Maintain and inspect the air circuit breaker and the plastic circuit breaker as the user's manual after switching on/off for many times.
Do inspect the isolating status among the isolating rooms after inspection or maintenance.

XIII. Complete set of this product
The followings will be supplied by the manufacturer:
packing list
certificates of qualification
user's manual
ex-factory test report
the relative schematic diagrams
keys of the cabinet doors, operating handles and other spare parts specified in the contract.
the installation and using operating instruction manual of the main elements

XIV. Order notice
The purchase contract shall include the following contents:
Type of the product, as well as its scheme numbers of the main loop and auxiliary loop
Combination sequence figure of the main loop system
Electric schematic diagram of the auxiliary loop
Elements list of the cabinet
Setting parameters of the voltage, current and time in the circuit
Other special requirements

XV. Attached installation figure
(1) Space requirement of
the distribution room

Install vertically;
If by the wall, for ventilation:
The min distance to the wall:
S1≥80mm;
The min distance to the roof:
S2≥500mm;
The width of the operation path:
W≥600mm;