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The PCA2 protection condition analyser from Megger enables users to simultaneously test all of the key elements of substation protection systems — including protection relays, circuit breakers, DC systems and protection circuitry — even while the system is on load.

The system — developed in conjunction with EDF Energy UK — captures detailed information about the full protection operation sequence before, during and after the trip, making it suitable for critical first-trip testing.

The evaluation and recording system features a software-controlled current source that can inject a precisely controlled test current into the protection relay, even while the system is on load. During the test, the instrument continuously records the trip-coil voltage and current profile, together with additional user-selected voltages, currents and contact timing values, using its integrated high-speed oscillographic recorder.

According to the company, the PCA2 is suitable for both on-load and off-load testing. When used in on-load mode, an auxiliary clip-on Hall-effect CT monitors the load current for main contact timing. It is also used as a feedback element so that the current injected by the instrument into the relay under test automatically takes into account the load current already present.

Key features

  • Software-controlled current source
  • Large-capacity internal memory
  • High-resolution touchscreen
  • Integrated tally-roll printer
  • Compact yet robust construction
  • Padded protected case
  • Power and test cables
  • Two clip-on Hall-effect probes
  • 1GB USB memory stick
  • Calibration certificate
  • Detailed operating manual
  • PC-compatible PCA viewer software

Megger

For 100 year Megger has been committed to making electrical measurement of low and high voltage systems more accurate and simple-to-use. It has a reputation for tough, reliable, high quality equipment.

For 100 year Megger has been committed to making electrical measurement of low and high voltage systems more accurate and simple-to-use. It has a reputation for tough, reliable, high quality equipment.

Megger offers equipment for testing breakers, protection relays and CTs, as well as transformers, earthing systems and standby batteries to the electrical generation, transmission and distribution industries. In the LV sector Megger is the market leader for the testing of building wiring to the 17th Edition of the Wiring Regulations and portable appliances.

They have recently acquired a range of water leak detectors

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