Electrical Contact Resistance of Multi-Contact Connector in Semi-Retractable Current Lead

Abstract

Heat leakage through current leads is the dominant contributor to cryogenic heat load for various high field magnets. The semi-retractable current lead is a good option because the conductive heat leak can be eliminated after the magnet is charged. It is composed of a normal metal element and an HTS element. The normal metal element is disengaged from the HTS element through the multi-contact connector without disturbance to the insulating vacuum space and without requiring complete removal of the normal metal element. In this paper, the electrical contact resistance of multi-contact connector is measured to confirm the feasibility of our application. The effects of current level, operating temperature and size on the electrical contact resistance in a lockable set are also discussed.

Evolution of contact performance of industry electrical connector based on reliability accelerated testing

“…To more accurately analyze the variation characteristic of contact resistance, many scholars found that changing operating conditions could also affect the contact resistance, Choi et al 13 measured the contact resistance of the connector and found that with the increase of the electrical connector’s working temperature, the size of the electrical connector increased, the contact resistance decreased. Guarino et al 14 researched the influence of thermal contact resistance of aluminum foams in forced convection.…”

Electrical Erosion Characteristics of Pt-Ir-Zr Alloy Contact under DC Load

“…The noble metal alloy electrical contact materials are widely used in aviation engine ignition contacts, high sensitivity relays, as well as micro-motor with electrical contacts, due to its excellent anti-welding, electrical conductivity, stable and low contact resistance. The study of the electric erosion phenomenon of contact materials is significant to improve its service life and reliability [1][2][3][4][5]. In recent years, many researchers have been interested in the study of arc erosion, surface morphologies and material transfer phenomenon of noble metal alloy contact materials [6][7][8][9].…”