ABB Unisec


Medium voltage switchgear for secondary distribution up to 24 kV
UniSec is an indoor air-insulated switchgear for medium voltage secondary distribution up to 24 kV, 1250A, 25kA. UniSec offers a broad portfolio of functional units and technical features and is suitable for a wide range of applications including industry, substations, data centers, small generation systems, buildings & infrastructures and smart grids.
Product scope

Air-insulated switchgear for medium voltage secondary distribution up to 24 kV, 1250A, 25kA
Key benefits

Modular and flexible design ensures simple and easy installation, use and maintenance
Wide range of apparatus, SF6 switch disconnectors, SF6 vacuum circuit breakers and vacuum contactors
High-level operator safety thanks to internal arc-proof design and a wide range of mechanical interlocks
Both LSC2A and LSC2B service continuity classification available, depending on specific plant needs
Optimized investments as a result of space-efficient design, with compact functional units and reduced footprint
Suitable and certified for installation in the most severe conditions like marine, areas with high seismic hazard, and low temperature environments
Key features

Functional units with removable and withdrawable circuit breakers
HBC functional unit with multi-function apparatus, integrated vacuum circuit breaker and gas insulated disconnector, only 500mm wide
Several solutions for exhausting the gas produced by an internal arc either inside or outside the switchgear room
Tested according to the latest IEC, GB and GOST specifications
Suitable and certified for Marine, Seismic, Low temperature environments

For users with a green focus, UniSec AirPlus is also available – offering the same known dimensions, safety and reliability. The UniSec AirPlus utilizes an eco-efficient version of the HySec, a combined circuit breaker and disconnector. With ABB’s AirPlus™ insulation gas in the disconnector device, the global warming potential is reduced to less than 1 – a reduction of more than 99.99% compared to the conventionally used SF6.

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