3 phase changeover

[Tonye]

7.12.2.4 Where the alternative supply is intended to provide a supply to an
installation that is not connected to the main supply, or to provide a supply
as a switched alternative to the main supply, the capacity and operating
characteristics of the alternative supply shall be such that danger or damage
to equipment does not arise after the connection or disconnection of any
intended load as a result of the deviation of the voltage or frequency from the
standard range. Means shall be provided to automatically disconnect such
parts of the installation, as may be necessary if the capacity of the
alternative supply is exceeded

My interpretation of this regulation is the following.

That danger or damage to equipment does not arise after the connection or disconnection of any
intended load as a result of the deviation of the voltage or frequency from the
standard range.

And

Means shall be provided to automatically disconnect such
parts of the installation, as may be necessary if the capacity of the
alternative supply is exceeded

I think what they are saying here is that there needs to be overload protection for the alternate power supply
and not automatically disconnecting of individual circuits

The Changeover switch is 63A 4pole, adequate for Eskom supply