UniSafe (ABB Technology)

UniSafe (ABB Design) 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.

 

Ambient conditions
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 voltage	kV	12	17.5	24
Rated insulation voltage	kV	12	17.5	24
Power frequency withstand voltage	kV	28	38	50
Lightning impulse withstand voltage	kV	75	95	125
Rated frequency	Hz	50-60	50-60	50-60
Main busbar rated current	A	4000	4000	4000
Rated current of the branch connections	A	630 1250 1600 2000 2500 3150	630 1250 1600 2000 2500 3150	630 1250 1600 2000 – –
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 4000	3600 4000	2500 –

 

Degrees of protection
The degrees of protection of the switchgear comply with IEC Standards.
UniSafe switchgear are normally supplied with the following standard degrees of protection:

• External housing: IP4X
• Inside the units: IP2X.