11.5kV 13.2kV 14.4kV 17.5kV SF₆ gas-free ring main unit /switchgear source manufacturer
Key attributes
| Brand | ABB |
| Model NO. | 11.5kV 13.2kV 14.4kV 17.5kV SF₆ gas-free ring main unit /switchgear source manufacturer |
| Rated voltage | 24kV |
| Rated frequency | 50/60Hz |
| Series | UniSec Air |
Product descriptions from the supplier
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:
The voltage classes of some of these eco-friendly switchgears include 6kV, 6.3kV, 6.6kV, 6.9kV, 7.2kV, 10kV, 10.5kV, 11kV, 11.5kV, 12kV, 13.2kV, 13.8kV, 14.5kV, 14.4kV, 15kV, 15.5kV, 15.6kV, 17.5kV, 20kV, 21.9kV, 22kV, 24kV, 30kV, 33kV, 33.5kV, 34.5kV, 35kV, 36kV, 38kV, 38.5kV, 40.5kV, 44kV, 45kV, 46kV, 66kV and 69kV. and customization is available.
GSec Air:
Related Products
-
3.6kV 7.2kV 12kV 24kV indoor metal-clad withdrawable switchgear
-
12kV SF6 insulated switchgear/power distribution ring main unit
-
14.4kV 15kV 15.5kV 15.6kV Intelligent Electrical Solid Insulated Switchgear /Ring Main Unit
-
40.5kV 44kV 45kV 46kV 66kV The compact Solid Insulated Metal-Enclosed Ring Main Unit/ Switchgear
-
10.5kV 11kV 11.5kV 12kV Indoor Solid Insulated Ring Main Unit/RMU
-
30kV 33kV 33.5kV 34.5kV 35kV Solid Insulated Ring Main Unit/switchgear Original Manufacturer
-
10.5kV 11kV 11.5kV 12kV Solid Insulated Ring Main Unit/Switchgear source manufacturer
Related Knowledges
-
Faults and Handling of Single-phase Grounding in 10kV Distribution LinesCharacteristics and Detection Devices for Single-Phase Ground Faults1. Characteristics of Single-Phase Ground FaultsCentral Alarm Signals:The warning bell rings, and the indicator lamp labeled “Ground Fault on [X] kV Bus Section [Y]” illuminates. In systems with a Petersen coil (arc suppression coil) grounding the neutral point, the “Petersen Coil Operated” indicator also lights up.Insulation Monitoring Voltmeter Indications:The voltage of the faulted phase decreases (in01/30/2026 -
Neutral point grounding operation mode for 110kV～220kV power grid transformersThe arrangement of neutral point grounding operation modes for 110kV～220kV power grid transformers shall meet the insulation withstand requirements of transformer neutral points, and shall also strive to keep the zero-sequence impedance of substations basically unchanged, while ensuring that the zero-sequence comprehensive impedance at any short-circuit point in the system does not exceed three times the positive-sequence comprehensive impedance.For 220kV and 110kV transformers in new constructi01/29/2026 -
Why Do Substations Use Stones, Gravel, Pebbles, and Crushed Rock?Why Do Substations Use Stones, Gravel, Pebbles, and Crushed Rock?In substations, equipment such as power and distribution transformers, transmission lines, voltage transformers, current transformers, and disconnect switches all require grounding. Beyond grounding, we will now explore in depth why gravel and crushed stone are commonly used in substations. Though they appear ordinary, these stones play a critical safety and functional role.In substation grounding design—especially when multiple gr01/29/2026 -
Why Must a Transformer Core Be Grounded at Only One Point? Isn't Multi-Point Grounding More Reliable?Why Does the Transformer Core Need to Be Grounded?During operation, the transformer core, along with the metal structures, parts, and components that fix the core and windings, are all situated in a strong electric field. Under the influence of this electric field, they acquire a relatively high potential with respect to ground. If the core is not grounded, a potential difference will exist between the core and the grounded clamping structures and tank, which may lead to intermittent discharge.I01/29/2026 -
Understanding Transformer Neutral GroundingI. What is a Neutral Point?In transformers and generators, the neutral point is a specific point in the winding where the absolute voltage between this point and each external terminal is equal. In the diagram below, pointOrepresents the neutral point.II. Why Does the Neutral Point Need Grounding?The electrical connection method between the neutral point and earth in a three-phase AC power system is called theneutral grounding method. This grounding method directly affects:The safety, reliabilit01/29/2026 -
What’s the Difference Between Rectifier Transformers and Power Transformers?What is a Rectifier Transformer?"Power conversion" is a general term encompassing rectification, inversion, and frequency conversion, with rectification being the most widely used among them. Rectifier equipment converts input AC power into DC output through rectification and filtering. A rectifier transformer serves as the power supply transformer for such rectifier equipment. In industrial applications, most DC power supplies are obtained by combining a rectifier transformer with rectifier equ01/29/2026
Related Solutions
-
Electrical House (eHouse) SolutionsReduce site complexity, improve lead timeABB eHouses are prefabricated transportable substations, designed to house medium voltage and low voltage switchgear, critical power equipment and automation cabinets.An eHouse solution is a cost effective, risk reduced alternative to conventional concrete block and brick construction. Each eHouse module is custom engineered to meet application requirements with respect to equipment layout, site footprint limitations and logistics considerations.Installat04/16/2025 -
Improve speed to deployment Modular prefabricated and pre-engineered solutionsReduce site works and risk of schedule delays and cost overrunsOverview：With a complicated data center project that has short delivery timelines, prefabricated modular solutions and pre-engineered modular solutions may be the answer.Modular solutions are ideal for enterprise, colocation, edge and cloud data centers, where project replicability and expandability are critical, alongside fast deployment time.Reduce risk by leveraging prefabricated and integrated solutions:Fast track projects with p04/16/2025
