SIRIUS S6 frame — panel fit and wiring constraints
The 3RT1056-6AF36-3PA0: Power circuit wiring accepts stranded conductors from 25 mm² up to 120 mm². The coil terminals are screw-type, rated for 110-127 V AC, with a pick-up dropout ratio of 0.8 x rated voltage — meaning the contactor drops out when the control voltage falls below about 88 V on a 110 V nominal coil.
Duty-cycle limits and thermal clearance
Switching frequency depends on the duty class: 800 operations per hour maximum in AC-1 (resistive loads), 750/h in AC-3 (squirrel-cage motors), 300/h in AC-2 (slip-ring motors), and 130/h in AC-4 (plugging/inching). The AC-3e rating matches the standard AC-3 figure at 750/h. These limits govern how fast the contactor can cycle without exceeding the thermal capacity of the arc chamber. Arcing time is 10-15 ms, with operate times of 40-60 ms on both AC and DC control. Clearance requirements: 10 mm above and below, 20 mm forward, 10 mm to the side. For audit purposes, the power factor at 50/60 Hz is 0.8, which should be factored into any coordination study with upstream protection. The full-scale value for overload release setting is 1.1, meaning the overload relay (ordered separately) can be set to 1.1x the contactor's rated current for motor protection coordination.