Generator rotor telemetry for protection and condition monitoring
Why rotor telemetry matters
Rotor faults can escalate quickly and can be difficult to diagnose with stationary-only measurements. Rotor telemetry provides a practical route to continuous monitoring, enabling rotor-side measurements to be transmitted to a stationary receiver—without slip rings—supporting earlier detection and planned interventions.
Typical applications
- Ground/insulation fault monitoring on field windings of synchronous generators and motors with brushless exciters.
- Rotor health monitoring programmes where continuous wireless monitoring reduces risk of catastrophic failure and unscheduled outages.
- Upgrades/replacements of older slip-ring contact ground fault detectors with modern wireless telemetry approaches.
- Commissioning, troubleshooting and life-extension projects where rotor condition data is required to confirm repairs or operating changes.
How the solution is typically deployed
- Define the failure modes you need to detect (e.g., insulation degradation, ground faults) and the decision workflow (alarm thresholds, actions).
- Select telemetry architecture: rotor-side measurement + wireless transmission + stationary receiver + integration to plant systems.
- Confirm mechanical/electrical integration constraints (mounting, power, EMC, access during outages, maintenance windows).
- Commission and validate with baseline data; implement trending and maintenance triggers.
Associated solutions
Earth Fault Resistance Monitor (EFREM): wireless rotor ground fault monitoring solution for generators and motors.
Rotor Ground Detection System (AT-8600): continuous wireless detection of insulation faults on field windings of brushless machines.
