A significant number of our accelerators use old style Allen Bradley 2W carbon resistors like these:
The accelerator supplier, IBA, can no longer supply them. They have an alternative but do not recommend mixing old and new due to different aging characteristics.
Does anyone know of a supplier of these resistors, generally in the meg ohm range? I would only be looking for small numbers to repair damaged strings like above.
Anecdotally there was a previous problem with this type of resistor where the manufacturing process was changed so that the internal end of the leads was cut to a chisel point which resulted in them exploding when a high voltage was applied.
The manufacturer can supply an alternative but they recommend replacement of the complete set of 96 chains which is a little expensive. The chains are made up of 12 x 10Mohm resistors. Each chain drops up to 35kV DC and operates in 6 Bar of SF6. The chains are installed around an accellerator tube so the length is important.
The manufacturer can supply an alternative but they recommend replacement of the complete set of 96 chains which is a little expensive. The chains are made up of 12 x 10Mohm resistors. Each chain drops up to 35kV DC and operates in 6 Bar of SF6. The chains are installed around an accellerator tube so the length is important.