Outdoor cabinets

Reference Szafy zewnętrzne

OUTDOOR CABINETS

The technology of access exchange guarantees updating existing transmission network with usage of valuable electronic equipment. In order to lower the costs of modernisation, the most common solution is joining old part of installation (copper wires) with new one (fibre optic cables) in outdoor access cabinets (like SZD). The main task of outdoor access cabinet is full protection of installed equipment.

The cabinet fulfils the requirements of protection against negative influence of environment (rain and snow falls, sun, dust etc) and vandalism. Another very important task of SZD cabinets is providing specified climatic conditions which depend on installed equipment. The construction of SZD cabinet enables optional arrangement of inside equipment. It makes possible to use SZD cabinets not only in access systems, but also in each case where the protection of outdoor equipment working in extreme conditions is very important. SZD cabinets produced by ZPAS have been already used in telecommunication industry, on ships, platforms, stamping press and intermediate pumping gas stations, heat and power stations, power industry plants, refineries, cement plants, for protection of machinery for outdoor lightening operating etc.

DESIGN

TECHNICAL DATA

Material
Cabinets framework - aluminium profile,
Side panels and doors - aluminium profile,
Roof (internal mantle) - 1.5 mm thick aluminium sheet,
Roof (external mantle) and plinth - alternatively stainless steel sheet, Al-Zn coated (aluzinc) steel sheet or aluminium sheet.

Surface finishing

Aluminium profiles of the framework and aluminium frames of side panels and doors: Anodised (in EMC version chromate coated and powder painted in RAL 7035)
Aluminium profiles of side panels and doors: Chromate coated and powder painted in RAL 7035
Internal mantle of the roof: Natural aluminium
Plinth and external mantle of the roof: Powder painted in RAL 7035

In EMC version of the cabinet conductivity between each elements of the construction in esured.

Protection Degree
Standard cabinets have got protection degree IP 54 in accordance with EN 60529. If required it can be increased up to IP 55.

Note:
ZPAS reserves the rights to implement changes in construction. All technical solutions used in construction of SZD cabinets are reserved in Patent Office of Poland.

Framework

Supporting structure of the cabinet is the framework made of aluminium profiles, which are joint together by adaptors. In profiles there are special ducts, which enable the assembly of swing frame or optional creation of supporting structure for mounting equipment.
The framework of the cabinet is in standard set on the plinth. The height of the plinth depends on customer’s request: from 40 to 300 mm.

Doors, side panels

Doors and side panels of SZD cabinets are made of aluminium rail-profiles which are fastened together. The aluminium profiles make double ventilation wall. In the cabinet there are mounted two-point rod-latch locks. The door handle is made of zinc and aluminium alloy. On customer’s request it is possible to have optional type of patent insert (ABLOY, KABA, EMKA, etc). It is possible to make special opening for temporary cable entry (e. g. from outside power supply unit).

Standard roof for SZD

Standard roof for SZD cabinets is made of two mantles of 1.5 mm thick sheet steel. Between the mantles there is a gap, which enables to carry away accumulated condensation water.

Dimensions of SZD cabinets

The SZD cabinet has a modular design. The main part of the cabinet is made of panels (which are fastened by latches) and aluminium profiles. Both panels and profiles can be cut to any length. This type of design makes it possible to achieve the desired cabinet dimensions. Every cabinet is designed and manufactured on individual request (together with interior installation – it is possible to create all types of partitions and supporting structures of the cabinet).
As a standard, the technology allows for the manufacture of cabinets with single or double leaf doors.

MULTI-DOOR CABINETS

On request, we can deliver multi-door cabinets.

SZD CABINETS IN ACCORDANCE WITH EMC STANDARD

EMC shielded cabinets

EMC shielded cabinets are used when devices which are mounted inside the cabinet require protection in electromagnetic compatibility. Aluminium profiles used in the cabinet are additionally chromated. Special current conductive gasket is used in order to provide conductivity between each element of the cabinet (roof, plinth, side panels, door).

APPLIANCES IN SUBSCRIBERS’ ACCESS SYSTEMS

Division of cabinet’s interior

In the cabinet’s construction there are four autonomous sections:

Battery section
Chamber of devices
MDF section
Energy section

Battery section

In standard, it is placed in the bottom part of the cabinet and is designed for installing temporary emergency power supply of the system. For additional lower of temperature in summer season, there are used two solutions:

thermal battery,
ventilating fans - ventilation of the section through the cabinet’s mantle.

Chamber of devices

In standard, it is placed in the central part of the cabinet and equipped with mounting bars in 19" or 21" standard or the swing frame. This section is designed for mounting active devices of subscribers’ access system (service of optical fibre and patch panels).

Distribution section

This section is designed for operator. It is equipped with teletechnical links (instillation of copper cables). Additionally, the section can be equipped with support moveable construction which adapts to each type of terminal blocks.

Energy section

This section is intended for power industry plants and designed for input of power supply. It has got fuses and a socket to plug in standby diesel generator in case of energy failure. In this section it is also possible to mount electricity meter and additional a special sight-glass, which enables reading of the meter without opening the cabinet’s door.

OUTDOOR CABINETS FOR POWER INDUSTRY

SZD Cabinets are used as a enclosure to measuring system also and energetic distribution. Enclosure of this type requires the special organization of cabinet interior. Applied in earlier solutions mounting bars was replaced by mounting board or system of special cross bars. Often on outside of the cabinets additionally is installed a energetic terminal socket.

FS wiring cabinet

Outdoor cabinet for lighting control

OUTDOOR CABINETS ADAPTED FOR FIBER OPTIC SYSTEMS

SZD cabinets can be equipped with special elements to lay and organize fibre optic cables. The pictures show sample solutions – cabinets equipped with fibre optic cable tube distributors (mounted on 19" mounting profiles) and a vertical organizer with reserve reels. It is possible to configure the cabinet for individual customer needs.

OUTDOOR CABINETS ADAPTED FOR POWER SUPPLY SYSTEMS

SZD cabinets are also used for outdoor installation of amplifiers for cordless power supply of telecommunication devices. Cabinet’s interior is divided into two autonomous parts: battery section (bottom part of the cabinet) and devices section (upper part of the cabinet). Additionally, on customer’s request, it is possible to manufacture a special type of roof intended to assembly of electric accessories.

Inside the cabinets there are mounted telecommunication amplifiers with high power, what is consequence of big power losses (heat dissipation). Direct venting, by means of two fans (which capacity is 510 m3/h each) mounted on the roof or on the cabinet’s door, provides specific climatic conditions inside the cabinet.

Additionally, the system of fans’ control can be used. It is able to switch on the roof fans on pre-set inside temperature threshold. Fans’ rotation is lineal regulated and depends on temperature of modems installed inside of the cabinet.

EXTENSION OF OUTDOOR CABINETS

Often after several years since moment of installing the cabinet appears a necessity of installation in enclosures a new equipment. With way on fact that space in cabinets was alredy used earlier, it state a serious problem for fitters. Going out to opposite of requirement ZPAS company worked out three ways of increasing existing cabinet:

1) Extension of cabinet on sides – This solution consists on attaching to existing cabinet extension parts which can be used as f. ex. MDF section, battery section, chamber of devices, power section etc.

2) Cover plate on cabinet – the solution consists on disassembly of doors and side panels in old cabinet and putting on from top, new larger enclosure. It covers so far installed equipment and it allows on adding new one. This variant does not require stopping work of installed equipment on time of exchange enclosure.

3) Extension upwards – the solution consists on disassembly of external mantle and internal roof then putting on and installing top extension part.

OUTDOOR CABINETS MADE OF ALUMINIUM SHEETS

Outdoor cabinets made of aluminium sheets come in two types: Single-wall cabinet – made of sheet metal with a thickness of 2 mm Double-wall cabinet – outer jacket and metal sheet frame with a thickness of 2 mm, metal sheet inner cladding with a thickness of 1 mm or 1.5 mm (depending on the cabinet size). All outdoor cabinets are custom-made. You can order a cabinet in size, with partition of cabinet's interior and supporting structure of your choice. To ensure appropriate climatic conditions inside an enclosure, we use various types of heat removal systems (ventilating fans, heat exchangers, air conditioners), and the right number of heaters, depending on your needs. To improve insulation, the cabinet's interior can also be lined with insulating foam. The cabinets have IP 54 protection degree.