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Accumetrics - Model AT-8100 -Static Exciter Rotor Ground Fault Detector
The Static Exciter Ground Fault Detector Model AT-8100 provides continuous wireless monitoring of insulation fault resistance and field voltage on brushed exciter generator and motor field windings, combining advanced ground fault measurement techniques with the latest innovations in digital telemetry. The system also provides users with condition monitoring data, allowing operators to monitor trends over time in order to make better informed operational and maintenance decisions.
Continuous Fault Resistance Monitoring for Brushed ExcitersContinuous Fault Resistance Trending for Predictive Maintenance
Accumetrics’ Static Exciter Rotor Ground Fault Detector Model AT-8100 provides statically excited field ground fault detection technology. Building on the success of the Accumetrics’ Earth Fault Resistance Monitoring Systems for brushless generator designs, the Rotor Ground Fault Detector system provides continuous on-line monitoring for brushed-style excitation generators and motors.
Conventional field ground detectors may detect the occurrence of faults but provide no advance warning or indication of the fault’s severity. In fact, the severity at the detection threshold may vary by several orders of magnitude, depending on fault location. Now, by combining 16-bit digital measurement technology with the most sophisticated technique available for generator ground fault measurements, Accumetrics overcomes these limitations with the Static Exciter Rotor Ground Fault Detector Model AT-8100.
Measurement of actual resistance allows users to monitor trends over time and track the progression of ground faults from their onset. This provides an early warning of impending failure and allows for predictive maintenance of a machine. Ground fault severity data can be used to make operational and maintenance decisions. In addition, the technique yields a location factor, which indicates where the fault occurs along the length of the field winding.
- Continuous on-line monitoring of faults while rotating or at standstill
- Trending of fault severity resistance
- Indication of fault location for ease of diagnosis and repair
- Ongoing monitoring of field excitation voltage
- Alarm relay contact outputs for multiple resistance limits
- Built-in self-diagnostics and malfunction alarm
- Rotor protection through condition-based maintenance
- Predictive maintenance for large generators and motors
- Early warning system of impending failure due to ground faults