Data Centers – Part 3: Metering Data Centers: Challenges and Best Practices for Utility Accuracy

  By

In Parts 1 and Part 2 of this series, we covered the unique characteristics of data center loads and their growing strain on utility infrastructure. In Part 3, we focus on the metering side of these massive energy users. Because data centers operate 24/7 with redundant systems and backup power, metering and billing accuracy can get complicated—fast.

Here’s how utilities and metering professionals can stay on top of it.

Dual Feeds and Redundancy: Two Meters or One?

Most large data centers demand redundant utility feeds to maintain uptime. This introduces multiple metering setups:

  • Option 1: Two independent meters on each feed, summed at billing
  • Option 2: A single master meter downstream of the failover switchgear

Best Practice: Keep meters on each feed and monitor both with your AMI system. This allows for fault detection, load profiling, and revenue assurance—even if one feed remains idle most of the time. In either case, make sure that both feeds have a meter so they can be monitored independently. It may also be helpful to meter each individual transformer. The more data, see what I did there, the better.

Review our AMI deep dive to understand how modern metering systems handle complex, multi-feed sites.

Backup Generation and Net Metering Complications

Data centers often employ:

Depending on your interconnection policies, backup generation can:

  • Backfeed into the grid during test cycles
  • Confuse meter readings during momentary switching
  • Violate net metering rules if not isolated properly

Recommendation: Install revenue-grade meters with anti-backfeed capabilities or configure metering CTs with logic that ignores generation-only intervals.

Tools like the Fluke 1777 Power Quality Analyzer can help verify load versus generation during commissioning.

Load Profiles and Billing Precision

Constant loads can hide subtle but important changes in usage. Metering professionals should look for:

  • Gradual increases in baseline kWh demand over months (growth signal)
  • Load drops that may indicate system switching or failure
  • Harmonic signatures from new UPS equipment or cooling loads

Tip: Use AMI interval data to detect unusual patterns. For training on usage breakdowns, review our Load Profile article.

Meter Forms and CT/PT Considerations

Most data centers are on primary metering schemes and require:

  • 9S meters for polyphase applications
  • Current transformers rated for >4000A in many cases
  • Potential transformers when primary voltages exceed meter voltage limits

You can refresh your understanding of these setups with our articles on Meter Forms and CTs and PTs.

Also consider the Fluke 376 FC Clamp Meter for safe CT current verification in the field.

Cybersecurity and Remote Metering Access

With data centers being critical infrastructure, utilities must ensure:

  • Secure transmission of meter data over encrypted channels
  • Controlled access to meter configuration and data pulls
  • Firewalls or data diode systems between utility networks and metering endpoints

If your AMI or SCADA system interfaces with data center meters, coordinate with the facility’s IT/security team for regular audits.

Conclusion

Metering a data center is more than dropping in a meter base. From dual feeds to UPS-induced harmonics, the complexity demands robust planning, accurate equipment, and coordination with operations and IT.

In Part 4, we’ll explore the rate design side of data centers—how utilities recover infrastructure costs and ensure rate fairness while serving these high-demand, high-expectation customers.

Explore More:

Further Reading: For a deeper dive into multi-node metering architectures and generation-aware metering strategies, check out LBNL’s Metering Best Practices guide.

Did you miss any part of this 7-part series? See what you missed below.

Bookmark the permalink.

Comments are closed.