GuardII+ – Generator and Motor Condition Based Monitoring

Features

Partial Discharge

• Ideally used with permanently installed Iris Power 80pF Epoxy Mica Capacitors (EMC)
• Remote inputs with 8 analog points proportional to operating conditions such as equipment temperature, voltage, current or power. These conditions are recorded for trending and analysis.
• The GuardII+ uses superior automatic noise separation technology based on filtering and pulse shape analysis to reliably distinguish partial discharges from electrical interference (noise) to prevent false alarms.
• In response to a partial discharge alert, users can review the pulse height analysis plots, and the 36-window phase resolved PD plots using basic interpretation to confirm the cause of the alert

Rotor Magnetic Flux

• Ideally used with permanently installed Iris Power Total Flux Probe (TFProbe) or Folding Flux Probe (FFProbe)
• Inputs for shaft sync sensor (Keyphasor) to determine which poles have shorts detected.
• The diagnostic software provides instant analysis to indicate the presence and location any rotor poles with shorted turns by
• High speed acquisition capability creates a table of results covering each pole and each load point

End-Winding Vibration

• The hardware and diagnostic software allow for various configurations of single-axis and dual-axis accelerometer packages to suit the need of any application.
• Optional 4-20mA output modules can be included with the package that typically uses USB, Ethernet or Modbus.

Shaft Voltage and Current Monitoring

• Continuously monitors up to 4 inputs including 2 voltage and 2 current
• Accepts currents from existing grounding brushes using two different shunt values
• Automatic analysis and output of alerts on high level of current and voltage

Communication

• The GuardII+ can operate “stand alone” system with only periodic downloading of archived data or it can be networked into the plant control system for remote data acquisition and analysis through USB, Ethernet or Modbus.
• All alerts generated by the GuardII+ instrument may also be connected to a plant monitoring system.
• Combined with the Iris Application Manager (IAM),  data can be collected from GuardII+ units on multiple rotating machines which can be monitored continuously at a  given time.

Options

Options for data acquisition from:

• GuardII+ units appropriately configured for either Tubo Generators, Hydro Generators, or High Voltage Motors
• Sensor packages, commissioning, and training are also offered with the GuardII+ instrument