Siemens is seeking an electroconductive material/coating that is resistant to electrical arcs.
During a high current/voltage switching operation an electrical arc occurs. These arcs can cause functional failures of the electrical system.
In the event of switching the solution needs to prevent the evaporation/damage of the contact areas (see picture) through electrical arcs.
The three-position switch-disconnector is used in a three-phase gas-insulated, metal-enclosed, medium-voltage switchgear acc. to Norm IEC 62271-1-200. The switch has the functions switch-disconnector and make-proof earthing switch.
Key success Criteria
These criteria are essential for success:
High temperature resistant coating of electrolytic copper.
The coating/material has to be electroconductive.
Defined coating adhesion strength necessary.
After heat input, a damage/evaporation of the coating/material is permitted.
Test Voltage 38 kV.
Number of short-circuit making operations /Classification n=5.
Short-circuit making current of Ima 60 Hz up to kA 65.
Number of mechanical operating cycles (CLOSED-OPEN-EARTHED-OPEN-CLOSED) with no-load n=1000.
From our experience, the following criteria are recommended (high probability that these criteria need to be fulfilled):
Roughness max. Rz10
Hardness ~85 HBW 2,5/62,5
The mechanical load must not cause a detachment of the coating.
Siemens is open to all solutions that meet the success criteria.
May 17, 2019
Items to be submitted
We are looking for concise, non-confidential proposals. The proposal should:
Describe the technical approach
Provide information on the performance of the technology (if available)
Include a description of the responding organisation or team and their experience.
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Preferred Collaboration Types
Area of Interest
Engineering Science and Materials
Materials Science > Coatings
Materials Science > Structural Materials
Energy and Power Science > Chemical Power Materials, Devices, Processes and Systems
Energy and Power Science > Thermal Power Materials, Devices, Processes and Systems
Manufacturing > Electrical equipment-General
Engineering-Electrical > Electrical and Electronics
Energy and Power Science > Mechanical Power Materials, Devices, Processes and Systems > Mechanical Power Materials, Devices, Processes and Systems-All disciplines
Manufacturing > Other fabricated metal products; metalworking service activities > Coating of metals