But since you asked for a guide on a “hot” topic (likely meaning “in-demand” or “troubleshooting”): here’s a approach for Siemens NCDR-series arc-flash or fault detection relays.
If your search for "siemens ncdr 1100 manual hot" refers to or Hot Swap (replacing a unit without powering down the system), you need the Configuration Manual section on Media Redundancy Protocol (MRP) or device replacement. siemens ncdr 1100 manual hot