Since neutral is bonded to ground at building distribution point in a TN-S or TN-C-S earthing system, could floating neutral happen under the following conditions:
- Loss of N and/or PE at transformer
- Loss of N and/or PE at building distribution point
- Loss of N and/or PE at transformer and building distribution point
I'm trying to understand how to prevent floating neutral in a 3-phase power supply and thus avoid damage to low voltage equipments connected to a single phase.