NuclearProcurement:
The specific compound is proprietary to Siemens and is designed to match up characteristics with their preferred magnetic wedge materials. The idea is that it is a conductive putty form of the same magnetic material used in the stator (or rotor) wedge to help adhere the wedge to the lamination steel and provide a better mechanical and electrical bond. It is interesting to note that the manufacturer uses the same (magnetic) wedge material in their large machines as their wind generator designs - but the wind generators don't get the putty, even though they're just as likely to see the transient conditions and resulting electrical erosion as the larger machines.
I suspect that - like everyone else - the manufacturer is having supply-chain issues with obtaining some of the base materials ... hence the difficulty you're seeing in obtaining the end product.
You might get away with using a more commercially-available magnetic putty in a pinch, but you'll probably void any remaining manufacturer warranty as a result. You do want to verify that whatever putty you choose is suitable for the ambient conditions, in terms of chemical resistance and temperature (coil insulation just under the surface of the wedge should not be exceeding 120-140 C actual for Class F materials).
Converting energy to motion for more than half a century
