1. Likely the biggest benefit is to perform a study to determine the short circuit current available at various points in the system. This may allow the selection of circuit breakers with a lower interrupting rating and a higher instantaneous trip level.
2. Work from the bottom up, starting from bottom of the system and coordinate the branch lighting panels first, then the power distribution panels, then the switchboard or switchgear.
3. Use the short circuit selective coordination tables. They may be found in the Short Circuit Selective Coordination for Low Voltage Circuit Breakers data bulletin.
4. You may also increase the frame size of main or feeder breakers which increases the instantaneous trip level of these breakers.
5. Incorporating ground fault protection into feeder and branch circuits so that low level ground faults will be cleared before they escalated into high level phase-to-phase faults.