3.3.2 Backup Power Systems
This page outlines backup power systems for the estate, focusing on generator solutions, transfer arrangements, critical load selection, testing, and maintenance.
System Types
- Portable or Fixed Generators: Diesel preferred for reliability and storage stability
- Transfer Arrangements: Manual Transfer Switch (MTS) or Automatic Transfer Switch (ATS)
- Critical Loads: Bore pumps, wastewater pumps, treatment controls, essential lighting, communications
Sizing and Design
- Size generator for starting currents of large motors (account for inrush)
- Apply diversity and consider staged starting to reduce peak load
- Provide adequate ventilation, exhaust management, and acoustic treatment
Fuel and Storage
- Sized for minimum 8–24 hours run time based on critical load
- Compliant storage tank with bunding and spill management
- Fuel quality management and rotation schedule
Controls and Integration
- ATS logic for safe transfer with appropriate time delays and interlocks
- Generator protection: over‑current, under/over‑voltage, under/over‑frequency, emergency stop
- Remote monitoring where possible for runtime, alarms, and maintenance intervals
Testing and Maintenance
- Monthly test runs under load (at least 30 minutes) and record results
- Quarterly inspections; annual servicing per OEM
- Exercise MTS/ATS and verify indicators and interlocks during tests
Safety and Compliance
- Comply with AS/NZS 3010 for generator installations
- Earthing and neutral switching arrangements per design; clear labelling
- Keep clearances around generator; manage hot surfaces and exhaust
Version Control
| Version | Date | Description |
|---|---|---|
| 1.0 | 2025-10-06 | Initial Release |
Next Review Date: 2026-04-06