Power Systems Protection Test Equipment

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Power Systems Protection Test Equipment
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• PCA2
• Protection Condition Analyser

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What is it?

• All-in-one quick tester for Breaker Protection
• Can test circuit Online or Offline
• Provides all data required for CBM / RCM
  maintenance programs
• Secondary Current Injection Set with timer

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What does it test?

• Relay Op-Time
• Breaker Op-Time Condition ( reclose)
• Trip coil current profile
• Battery Condition, CT Wiring Integrity
• Snapshot of entire protection breaker system
  in actual, live operation

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Connections

• Only 2-wires clip-on CT
• Substation wiring not altered
• No connections broken or removed
• More connections gives more info
• No need for test blocks

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Connections In use
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Online Testing Why?

• Captures critical First Trip
• Minimal Outage Time can use reclose
• Protection remains active to point of trip
• Quick, cost-effective

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Online Injection How?

• Software based control-loop
• Feedback from clip-on CT
• Synchronised to Zero-crossing of load current

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Background

• Developed with EDF Energy UK
• 1000s of 11 33kV circuits
• Alternative to manual injection trip-testing
• Safer
• Combined test with Relay Op-Time
• Single instrument
• Modern, on-site results viewing, printing
  archiving

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Results

• Instant oscillographic numeric display
• On-screen measurements
• IEEE COMTRADE format
• Saved to internal Flash or USB-drive
• PC display using any COMTRADE viewer
• Built-in printer

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Results
Oscillographic Results
Numerical Results
TRLY Relay Op time LTCH Trip latch
release time BFFR Time when TC slug reaches
stop ACON Time the a contact interrupts the
TC current END Time when TC current reaches
zero MCON Time of transition of main interrupter
contacts
IPK1 Amplitude of first current peak IPLT Max
current peak VINI Initial battery
voltage VMIN Minimum battery voltage
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Typical Faults/Impending Faults Identified
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Conclusion

• Single multipurpose instrument
• Rapid Testing
• Online test (first trip)
• Archived test results
• On-site printout
• Enables cost-effective CBM / RCM program