Monitoring Products

Stator Leak Monitoring System

Early leak detection is critical to minimize generator damage and to improve outage planning.

The Stator Leak Monitoring System (SLMS) for liquid-cooled generators has two functions:

  • Online detection of water-cooled stator winding leaks
  • Maintaining cooling water oxygen content

Monitoring Products

Generator Flux Probe

A flux probe is used to detect shorted turns by waveform analysis of the air gap leakage flux. The probe allows you to monitor the health of the generator field winding periodically and can also diagnose generator field vibration issues. The GE patented flexible flux probe is permanently installed on a stator wedge where it provides continuous access to generator field data. Installation services are also available.

Hydrogen Purity Analyzers

The hydrogen purity analyzer WR series includes five models ranging from a single-channel portable unit to a three-channel multiple redundant unit used in nuclear applications. Our hydrogen purity analyzers are designed to monitor the gas purity in hydrogen-cooled generators, maximizing efficiency and safety. Operating at reduced hydrogen purity can be costly. The friction and windage losses for a 907 MW generator operating at 75 psig with a three percent reduction in hydrogen purity (from 98 to 95 percent) can increase losses from friction and windage by about 32 percent, or about 685 kW. The microprocessor-based design of the WR series purity analyzers provides accuracy within one percent.

Vibration Monitoring

The GE Generator Vibration Monitoring System (GVMS) is a proven method for detecting and monitoring the vibration condition on:

  • End windings
  • High voltage terminal leads
  • Core punching
  • Excitation leads
  • Excitation transformers
  • Stator bars
The monitor uses fiberoptic acceleration or capacitive displacement transducers for highly accurate measurements impervious to electromagnetic effects.

Gas Monitoring

Early and accurate detection of insulation overheating in generators is the key to finding problems before they turn into a costly forced outage. The Generator Gas Monitoring System immediately detects the byproducts of overheated insulation materials in a hydrogen-cooled generator. The monitor is sensitive to the thermal decomposition of materials such as epoxy paint and core lamination enamels, as well as many other insulating materials commonly found in generators. This proven method of detection is combined with the accuracy of a computer-controlled system to produce the most advanced monitor available.

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