Alexandra asks:
Hello. A store in a shopping center is being designed. The shopping center has its own separate branch for JSC and EO (emergency and evacuation lighting), the cable entry into the store goes from the lessor to the SHAO installed by the tenant.The specifications show the following diagrams for explanation:
a separate line is shown in ShchR, the first after the introductory machine (AB3): AB4 + RKF
the second line - from the shop's SHR (automatic machine + KM2 + RKF) to the SHAO (+ KM3).
Please tell me, is the phase control relay common in this circuit? On the diagram in the technical specifications they are shown separately in two different groups. But, is this possible? I attach a photo. Thanks!
The question is answered: 
Alexey Bartosh
Well, according to the scheme, it turns out that the RKF itself is powered through one machine (AB4), and its power contacts control the coil KM3, and this line, in turn, is protected by another machine - AB5, so it turns out that two groups. Further, at the second end of the line to SCHAO, KM3, whose second output is connected to zero.
Alexey Bartosh
At least that's what I see. Pay attention RKF after AB4 is indicated by a square, like a relay coil - hence the conclusion. It turns out that the RKF contacts turn on the KM3 coil that controls the emergency lighting (contact KM3 and AB9).
Common in what sense? In this case, the phase control relay is connected to the same phase and controls the emergency lighting circuit.
