How do you build power redundancy for a show?
Quick answer
Build power redundancy by using dual power feeds from separate sources, automatic transfer switches (ATS), and uninterruptible power supplies (UPS) for critical audio gear, ensuring seamless failover during mains failure.
Power redundancy for live events starts with dual independent power feeds—ideally from separate utility substations or generators—routed through an automatic transfer switch (ATS). The ATS monitors the primary feed and instantly switches to the backup if voltage drops or fails. For audio systems, adding a UPS between the ATS and your racks protects against micro-interruptions and conditions power quality.
SSOUNDS engineers recommend distributing loads across multiple power distros and phases to avoid single points of failure. Critical components like DSP, amplifiers, and mixing consoles should be on dedicated UPS-backed circuits. Generators with automatic start and sufficient fuel for the show duration provide true isolation from grid issues. Always test failover sequences during rehearsals.
For large-scale productions, consider a 'spider' distribution with redundant feeder cables and a secondary generator parked on-site. Label all circuits clearly and brief the crew on emergency procedures. Redundancy isn't just about gear—it's about planning, testing, and having a rapid response plan.
Key things to consider
- Use dual power feeds from separate sources with an ATS for automatic failover.
- Deploy UPS on all critical audio electronics (DSP, amps, consoles) to handle micro-outages.
- Distribute loads across multiple phases and distros to avoid single-point failures.
- Test generator start-up and transfer switch operation before the show.
- Label all circuits and train staff on emergency power procedures.
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