Apparatus and method for use in a power delivery system

A method of configuring a power delivery system, the method comprising:

• connecting a disconnector switch to a DC power supply such that a first terminal of the disconnector switch is connected to a first polarity terminal of the DC power supply and a second terminal of the disconnector switch is connected to a second polarity terminal of the DC power supply;
• the disconnector switch having at least a first position in which the first terminal is connected to a common terminal of the disconnector switch and a second position in which the second terminal is connected to the common terminal of the disconnector switch;
• connecting the common terminal of the disconnector switch to a first terminal of a DC circuit breaker having first and second terminals and configured to automatically switch from a closed state to an open state during an overcurrent condition;
• coupling an interlock mechanism to the DC circuit breaker and the disconnector switch such that the interlock mechanism can disable the DC circuit breaker from automatically switching from the closed state to the open state during the overcurrent condition when the disconnector switch is in the second position;
• connecting the second terminal of the DC circuit breaker to a first power line;
• and
• connecting the second terminal of the disconnector switch and the second polarity terminal of the DC power supply to a second power line.