Characteristics of UniSafe switchgear:

• Metal-clad air-insulated switchboard

• Studied for medium voltage distribution

• Factory-tested for installations inside rooms

• Guaranteed arc-proof units

• Compartments segregated by means of metallic partitions openly connected to earth

• Limited use of insulating materials

• Complete with mechanical safety interlocks

• Structure made of pre-galvanised sheet

• Putting into service, maintenance and service operations can be carried out from the front

• Complete set of apparatus: gas and vacuum circuit breakers, contactors and switch disconnectors

• Equipped with conventional instrument transformers or new generation sensors

• Wide range of functional units for any all installation solutions

• Easy-to-assemble modular structure

Transport:

• Airports

• Port installations

• Railways

• Underground railways

Service sector:

• Supermarkets

• Shopping malls

• Hospitals

• Large infrastructures

Applications:

Utilities and Power Plants

• Power generation stations

• Transformer stations

• Switching stations

• Main and auxiliary switchgear

Industry

• Pulp and Paper

• Textile

• Chemical

• Food

• Automotive

• Petrochemical

UniSafe is medium voltage metal-clad switchgear suitable for indoor installations. The switchgear is modular and is made up by placing standardised units side by side in a coordinated way. The unit compartments are metallically segregated from each other and the live parts are air insulated.

The switchgear functional units are guaranteed to be arc-proof in compliance with IEC 60298 Standards app. AA, class A accessibility, criteria 1 to 5. Installation requires very simple civil works. The switchgear can be wall-mounted. Access to the branch connections to connect the power cables takes place from the front of the switchgear.

Electrical characteristics of the switchgear

The electrical characteristics of the switchgear can vary depending on environmental conditions other than those described and for degrees of protection higher than the standard values.

Degrees of protection

The degrees of protection of the switchgear comply with IEC 60529 / CEI EN 60529 Standards.
UniSafe switchgear are normally supplied with the following standard degrees of protection:
• external housing: IP4X
• inside the units: IP2X
On request the external housing can be supplied with other degrees of protection up to a maximum of IP53.

Colour of the external surfaces

RAL7035.

Environmental conditions

The switchgear ratings are guaranteed under the following environmental conditions:

Minimum ambient temperature – 5 °C
Maximum ambient temperature + 40 °C
Maximum relative humidity 95%
Maximum altitude 1000 m s.l.m.
In presence of unpolluted and non-corrosive atmosphere.

Standards

The switchgear and the main apparatus it contains comply with the following Standards:

• IEC 60694 for general application

• IEC 62271-200 for the switchgear

• IEC 62271-102 for the earthing switch

• IEC 60071-2 for coordination of the insulation

• IEC 62271-100 for the circuit-breakers

• IEC 60470 for the contactor

• IEC 60265-1 for the switch-disconnector.

The IEC 62271-200 Standard has introduced new criteria regarding the definitions and classification of MV switchgear. One of the main changes introduced by this Standard is elimination of the classification of switchgear in metalclad, divided into compartments and in units. The classification of switchgear has been reviewed taking into account the viewpoint of the user, particularly regarding some aspects such as operability and maintenance of the switchgear, according to the requirements and expectations of good management of substations, from installation to dismantling. In this context, the “loss of service continuity” has been chosen as the fundamental criterion for the user.

According to the updated standards, UniSafe switchgear can be defined as follows:

1. Compartment with access controlled by an interlock
Compartment containing high voltage parts, designed to be open for normal service and/or normal maintenance, where access is controlled by the overall configuration of the switchgear and by the control apparatus.

2. Compartment with access based on a procedure
Compartment containing high voltage parts, designed to be open for normal service and/or normal maintenance, where access is controlled by an adequate procedure associated with a locked status.

3. LSC2B
Busbar, feeder and apparatus compartments physically and electrically segregated. This category defines the possibility of opening one of the main circuit compartments keeping the other compartments and/or function units energised.

4. Partition class
Metal-clad switchgear and control apparatus which offer continuous metallic segregations and/ or shutters (if applicable), destined to be earthed, among the freely accessed compartments and the live parts of the main circuit. The metallic segregations and shutters or the metallic parts of these, must be connected to the earthing point of the functional unit.