The LW9-72.5 outdoor SF6 circuit breaker is a transmission-class switching and protection device developed for 66kV power systems, with a rated voltage of 72.5kV. Electrical ratings, insulation levels, control voltages, terminal arrangements, and environmental configurations can be selected according to the project specification.
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Outdoor SF6 Circuit Breaker is primarily used in nominal 66kV power systems. The 72.5kV designation refers to the rated or highest equipment voltage.
Yes. It can be used to switch operating current and interrupt fault current on 66kV transmission and distribution lines when correctly rated for the system.
Suitable configurations may be used for capacitor-bank or reactor-bank switching. The bank rating, earthing arrangement, transient recovery voltage, switching frequency, and restrike requirements should be provided during selection.
The standard LW9-72.5 arrangement generally uses coordinated three-pole operation. If independent-pole operation is required, this must be stated so that an alternative solution can be evaluated.
The required system frequency must be stated in the inquiry. Availability of the selected 50Hz or 60Hz configuration will be confirmed in the technical offer.
The gas system is normally supervised through a density indicator or density relay. Operators should follow the supplied inspection limits and procedures rather than relying only on a conventional pressure reading.