ABB 245 kV ELK-14 series gas insulated switchgear

ABB has announced the Australian launch of its latest generation 245 kV ELK-14 series of gas insulated switchgear (GIS). The footprint of this latest GIS is 40% less than conventional designs and uses 20% less sulfur hexafluoride (SF₆) gas compared to the previous generation, making it even more environmentally friendly than its predecessor.

The compact design also enables the GIS unit to be delivered as a completely assembled bay, reducing installation time by more than 60% compared to traditional construction. The bays feature single-phase isolation, which is delivered fully tested and mounted on a frame. The intelligent control and protection equipment installed in the control cubicle directly at the bay is also a smart grid enabling feature.

The bay arrangement is highly flexible, allowing all system configurations, including subsequent expansions, to be easily and quickly implemented. The systems have been designed for a rated voltage of 253 kV and can handle rated currents of up to 3150 A. The versions conforming to the IEC and IEEE standards have been designed to protect power networks up to a rated short-circuit (fault) current of up to 50 kA. The ELK-14 design also facilitates more convenient accessibility to the operating mechanisms located in the front of the bay and positioning of the current transformers outside the gas compartments.

GIS technology is a compact, modular and robust solution for maintaining reliable electrical power under challenging conditions with minimum maintenance needs coupled with other key benefits which include low technical losses and enhanced equipment security. The technology’s minimised footprint enables installation in locations with space constraints, such as busy city centres and even indoors. ABB’s product range also includes GIS for offshore and mobile applications.