[Sirrotica]

The constant duty relays have 2 sets of windings. One high draw, high power set to pull the pole piece spool in, once the pole piece spool shifts it breaks one set of contacts and closes another set. The second set is energized to keep it pulled in without as much draw and heat being given off. If used only on the primary winding under constant duty they will soon overheat. Many types of battery powered aerial lifts as well as battery powered forklifts use them if your in search of one. Make sure of the voltage because they come in different voltages depending upon how the batteries/battery are used in a particular machine and what voltage control circuit is used.