Patent ID: 8263893

Claim:
A subsea arrangement, comprising: at least one canister comprising a chamber accommodating at least one circuit breaker, and a pressure balancer for balancing a pressure in said chamber against ambient sea water pressure, wherein said chamber is filled with a gaseous dielectric medium constituting a quenching medium for the at least one circuit breaker in the chamber; and wherein the pressure balancer comprises at least one pressure container containing a pressurized gaseous medium of a same type as the gaseous medium in said chamber, the pressure container being connected to said chamber via a control valve, which is arranged to be controlled by an ambient pressure so as to feed pressurized gaseous medium from the pressure container into the chamber when the ambient pressure increases in order to maintain the pressure in the chamber equal to the ambient pressure; a frame comprising at least one electrical power inlet, at least one electrical power outlet and a power distribution chamber; wherein a respective circuit breaker accommodated in said canister chamber is electrically connected to a respective associated power inlet and power outlet via electrical connections extending through the power distribution chamber.