What is a “stack” type high voltage power supply?

The SLS is a subcategory of Spellman’s SL Series, which offer output voltage from 160kV to 360kV (and beyond via special order) via a separate high voltage assembly commonly referred to as a “stack”. The necessity of the stack is simple, as output voltages increase economical and reliable cable/connecter assemblies become less available and more problematic to incorporate. The simple solution is to remove the cable/connecter assembly and to make the output voltage available via separate air insulated high voltage stack assembly. Large corona rings and/or toroids are typically used to suppress corona generation at these extreme output voltages. SLS units have two basic assemblies: the control rack and the air insulated high voltage stack assembly.