SF6-free air-insulated switchgear for secondary distribution/Ring Main Unit

Product Detail

Description:

UniSec Air is a medium voltage switchgear designed for secondary distribution up to 24kV, 630A, 20kA. It contains GSec Air, three-position load break switch or disconnector and earthing switch. This new component has a shunt vacuum interrupter for breaking capacity, dry air as the insulation medium, and a global warming potential (GWP) of zero. The switchgear also contains a vacuum circuit breaker and is fully compliant with IEC standards and the U F-gas regulation (EU) 2024 / 573.
The switchgear is based on a highly flexible and modular concept with standardized solutions that can be readily configured to meet the specific needs of each application. UniSec Air is fully tested according to IEC standard 62271-200.
UniSec Air is internal arc classified, IAC A FLR up to 20 kA, assuring safe operations for technicians when standing in front of the switchgear. Robust control and protection, metering, monitoring, and diagnostics suitable for various applications are also available.
UniSec Air is designed with a refined interface and with the same footprint, operations, and backward compatibility as the original UniSec switchgear,facilitating integration into existing systems and extensions of the installed base.

Customer benefits:

F-gas regulation compliance

Fully compliant with the EU F-gas regulation (EU) 2024 / 573
GWP of 0

Flexible and modular design

Better accessibility to MV cable connection and simplified installation, use, and maintenance.
Wide range of functional units equipped with LBS and disconnector, circuit breaker, conventional measuring transformers, current and voltage sensors, and protection relay solutions, making it suitable for most indoor applications.
Provides flexibility for a high level of customization to meet demanding requirements and is easy to order thanks to user-friendly configurator tools.
Compact design with multiple functional units width 375, 500 and 750mm for installation in a wide variety of electrial rooms and layouts.
Backward compatibility between UniSec Air and UniSec allows for easy integration into existing systems and extensions of the installed base.

Safe and Reliable

Internal arc classification available with various gas exhaust variants for enhanced safety.
Service continuity solutions LSC2B / LSC2A / LSC2 tailored for application needs, ensuring minimal service interruption.
High operator safety features an internal arc-proof design and a wide range of mechanical and electrical interlocks to enhance operator safety.
The GSec Air component has an internal volume of less than 25 liters.
Fast and dependable delivery times with pre-engineered just to install (JTI) switchgear solutions.

Main Technical Characteristics:

GSec Air:

FAQ

Q： What standards and certifications that ABB’s medium voltage switchgear products comply with?: A：
Our medium voltage switchgear products comply with international standards such as IEC 62271, GOST, GB/DL. They are also certified by leading industry bodies to ensure the highest levels of safety and performance. ABB also offers medium voltage switchgear products for ANSI standards.

Q： What’s the difference in the circuit breaker for air-insulated vs gas-insulated?: A：
Air-insulated switchgear circuit breaker is typically removable or withdrawable. The circuit breaker is based on vacuum circuit technology. In the gas-insulated, it is fixed mounted. The function of withdraw is provided by a separate disconnecting switch. Typically, a three-position switch with connected, disconnected, and ready-to-earth position.

Brand	ABB
Model NO.	SF6-free air-insulated switchgear for secondary distribution
Rated voltage	24kV
Rated frequency	50/60Hz
Series	UniSec Air