(Single Pole, Single Throw). One pole per direction. Can be normally closed or normally open.
Department under development
(Single Pole, Double Throw). One pole, two directions. Those. There is one common contact that can switch with two directions.
Section under development.
(Double Pole, Double Throw). Two poles for two directions, i.e. 2 groups of switches. In fact, these are two SPDT (2SPDT) relays in one, but having a common coil.
Trimmer and fixed condensers with optional air and water cooling