Medium voltage, air-insulated, arc proof switchgear for primary distribution
Unisame is medium voltage metal-clad switchgear suitable for indoor installations.
The switchgear is modular and is made up by placing standardized units side by side in a coordinated way.
Vacuum of SF6 circuit breaker technology is available.
Circuit breakers with the same rating are interchangeable irrespective of switching technology.
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 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.
The switchboard ratings are guaranteed under the following ambient conditions:
|Minimum ambient temperature||-5 °C|
|Maximum ambient temperature||+40 °C|
|Maximum relative humidity||95%|
|Maximum altitude||1000 m|
Electrical characteristics of the switchgear
|Rated insulation voltage||kV||12||17.5||24|
|Power frequency withstand voltage||kV||28||38||50|
|Lightning impulse withstand voltage||kV||75||95||125|
|Main busbar rated current||A||4000||4000||4000|
|Rated current of the branch connections||A||630
|Rated short-time withstand current (1s)||kA||50||50||25|
|Rated peak withstand current||kA||125||125||63|
|Rated short-time withstand current (3s)||kA||40||40||25|
|Rated peak withstand current||kA||100||100||63|
|Internal arc withstand current (1s)||kA||31.5||31.5||25|
|Rated current of the branch connections with forced ventilation||A||3600
Degrees of protection
The degrees of protection of the switchgear comply with IEC Standards.
UniSame switchgear are normally supplied with the following standard degrees of protection:
- External housing: IP4X
- Inside the units: IP2X.