Heat Dissipation from ACB Toes

摘要

A heat dissipation apparatus, system and method for an air circuit breaker (ACB) switchgear has at least one pair of primary contact toes constructed and arranged to connect to a terminal of the circuit breaker. A bus bar joint is connected to the primary contact toes. The heat dissipation apparatus comprises an evaporator clamped to the primary contact toes. A condenser is located at a higher elevation than the evaporator and at least two electrically isolating pipes fluidly connect the evaporator with the condenser. A dielectric fluid in the evaporator can be heated to a vapour state, with one of the pipes transferring the vapour to the condenser and the second pipe returning the condensed dielectric fluid back to the evaporator for cooling the at least one pair of primary contact toes.

主权项

1. A heat dissipation apparatus for an air circuit breaker (ACB) switchgear having at least one pair of primary contact toes constructed and arranged to connect to a terminal of the circuit breaker, with a bus bar joint being connected to the primary contact toes, the heat dissipation apparatus comprising:
an evaporator constructed and arranged to be clamped to the primary contact toes, a condenser located at a higher elevation than the evaporator, at least two electrically isolating pipes fluidly connecting the evaporator with the condenser, and a dielectric fluid in the evaporator adapted to be heated to a vapour state, with one of the pipes being constructed and arranged to transfer the vapour to the condenser and the second pipe being arranged to return the condensed dielectric fluid back to the evaporator for cooling the at least one pair of primary contact toes.