D-W TYPE HOUSING

>> The construction of housings
>> Cumulative buses
>> Designation and basic parameters of standard free-standing housing
>> Housing elevation
>> Designation and measurements of metal housings D-W type
>> Other components of the freestanding housing D-W type
>> GM cable penetration
>> We also provide, free of charge, computer-designed switching station - according to the schemes given by the customer

The construction of housings

D-W type housings are metal housings, made of steel sheets 2.0 mm thick and painted with powder paints using RAL 7035 light-grey colour or any other RAL colour.
The housings are to be installed on a base, as free-standing, by-the-wall housings. The construction of the housing is of prefabricated profiles, with a profiled roof, all elements properly welded. The profiles have holes perforated and the roof has cuts for membrane insulation cable penetration, to put out lines or cables. The height of the base is 100 mm. For higher (200 mm) bases enable us to install closed holes. The construction of the housing is enables mounting a rack from profiled and perforated U-irons. The housing have profiled side-walls screwed from each side. Side-walls are easy to remove, so the housings could easily be connected. The back-wall is made of zinc-coated sheet and is supposed to act as the housing's wall or a mounting board.

The housing can be made without the back-wall or without the back, depending on its purpose and function. Its door is deep-profiled, have a poured seal and hidden hinges. Easily removed hinges enable the user to dismantle the door easily.

The construction of the hinges let the door be open up to 135 degrees wide. The housings are closed using HS rotating bar three-point lock. The rack within the housing is prepared for the module division. The module: width x height (250 x 150 mm).

The insulation material covers constitute of angle profiles from corners and a board 3 mm thick. By cutting the angle profiles to proper length, three different covers of different measurements can be achieved after mounting, Mounted covers have snap screws in the corners. This solution enables fast mounting (pushing in the screw) and dismantling, using only a screwdriver. The screws are adapted to sealing.

The rack is made from vertical perforated profiles; profiles' depth: roof, side and floor depth (lower).

To connect profiled construction elements, the properly perforated supports (mounting profiles) are used. They are produced in different ways depending on the elements to be connected and their destination. The holes in the rack's profiles are to help properly aim the supports of the covers. The construction of housing and rack might seem complicated but its deliberate. It helps mount the system of cumulative and distributive buses and to prepare a modular "Promes" system of low-voltage switching station.   

Cumulative buses

The most important part of the high-voltage switching stations, prepared to switch current are the cumulative buses systems. In the D-W type housings cumulative buses system is used.

System is easy to use, because is comprises of:

• zinc buses of sections prepared to suit the load
• insulating cantilevers for the cumulative buses of suitable types
• complete mounting sets.

The cumulative buses sets in the "Promes" system use the following types of cantilevers:

• ST-3 for the current of 250, 400, 630 A
• UST 4 for the current of 800, 1250, 1500 A
• UST 5 for the current of 1500 do 4000 A
• UST5/4 for the current of 2000A do 4500 A
• special sets for the current up to 6300 A

Bus bridges are mounted in such way that the edges of the zinc buses are always of the same depth. This allows mounting the cumulative buses of 2500 A maximum in housing with 600 mm of depth. The cumulative buses sets for a larger current are mounted in housings with 800 mm of depth.

Bus bridges are mounted using zinc buses (for the needs of electro-technique) using original cantilevers and system mounting sets. Using tested and checked solutions within the construction of bridge buses and supporting elements allows to produce a switching station which would suit the EN60439-1 norm.

The tests of cumulative buses have been performed by the KE MA within the field of the resistance to measured surge current (I pk) and of the resistance to short-term one-second current (Icu 1 second) - with good results.

Bridge buses have the obligatory short-circuit strength and ensure safety of work in low-voltage switching stations.

Neutral protective buses and PEN are mounted on system cantilevers.   

Designation and basic parameters of standard free-standing housing

Housing elevation

Housing elevation is mounted from insulation covers. The covers can be full or have holes to suit the mounted machinery.

D-W housing are prepared to the mounting machinery of different national i foreign companies:

• switch fuses - NH 00/160 A, NH 1/250 A, NH 2/400 A, NH 3/630 A to be mounted on a mounting plate or a bus
• strip switches VERTIGROUP type mounted on a bus
• fuse base components 24 A i 63 A mounted on a bus
• SILAMAT insulating switch components of 125 to 1600 A with lever action
• SILAMAT insulating switch components of 80 to 630 A with rotary action
• TERASAKI compact components Tembreak - 3-field or 4-field from 63 to 1600 A
• counter boards
• measuring devices components

Designation and measurements of metal housings D-W type

Other components of the freestanding housing D-W type

a) Side walls

b) Roof of the housing and bottom of the housing have holes prepared for "GM" cable penetration

c) D-W housing plinth

d) D-W housing equipment components of the D-W housing

• frame - full supporting structure full supporting structure for mechanisms distribution and for bus bars (see point 2)
• hollow insulators - full and perforated
  

GM cable penetration

    On the roof and bottom of the housing, on customer's request, we mount membrane cable penetration, made from insulating material to
achieve IP 54.

We also provide, free of charge, computer-designed switching station - according to the schemes given
by the customer

In order to be processed and realized, the Project that should be provid ed must include:

1. One-line scheme of the switching station, including:

• current propagation in main bus bridges and current propagation divided into circuits
• type of protection
• type of the mechanisms within the equipment
• circuits main divisions

2. The placement of the switching station must be defined, including the room placement (freestanding, by-the-wall placement, standing in line).

• The project prepared by Firma H. Sypniewski, using our designing tools will include:
• switching station description an d function
• destination and general characteristics
• the scheme, corrected according to our technological abilities.
• placement of the apparatus defined in the scheme
• switching station's elevation with the door open
• the elevation and choice of cover panels
• basic devices set,
• accordance declarations after the making of a switching station
• preliminary evaluation and realization time