Recently, a lot of these generator jobs have been requiring convoluted load stepping approaches so avoid the starting currents hitting the generator all at once. Obviously, the easiest way to step the loads is with ATS switches but I'm told that you can use BMS systems, relay controller, or even PLCs to step the loads. I want to explore NOT using ATS switches because it seems to be such a waste to step 2 or 3 loads separately from the rest of the system when a couple of contactor,relays, and control transformer will do the same thing for a faction of the cost. All this being said, I have two questions:
1. Is there any issue with using industrial controls to step generator loads on emergency, legally required standby, and optional standby systems? For my specific application I'm looking to step optional standby loads. For Emergency and legally required systems I would just us an ATS because they are more critical loads.
2. From a contract document standpoint, has anyone seen industrial control systems like PLCs or relay switching systems specified on plan? Was it just a detail/sequence of operation or where you given a detailed wiring diagram?
1. Is there any issue with using industrial controls to step generator loads on emergency, legally required standby, and optional standby systems? For my specific application I'm looking to step optional standby loads. For Emergency and legally required systems I would just us an ATS because they are more critical loads.
2. From a contract document standpoint, has anyone seen industrial control systems like PLCs or relay switching systems specified on plan? Was it just a detail/sequence of operation or where you given a detailed wiring diagram?
