FAT, SAT and commissioning
Equipment is tested several times before handover. Each stage has a different purpose and a different witness. Click a stage.
Before you go to witness any test
Insulation resistance test (Megger)
Set up the test, choose the test voltage and press TEST. The lab simulates the reading for the cable condition you pick and checks it against the minimum. Then run a 10-minute test.
Test set-up
Instrument
Resistance over time (PI and DAR)
Continuity (R1+R2) and earth fault loop impedance (Zs)
For a final circuit, the protective device must disconnect fast enough when a line-to-earth fault happens. That depends on the loop impedance. Enter the circuit and the readings and see if it passes.
Circuit
Result
How the R1+R2 test is done
RCD testing
Choose the RCD, then enter the trip times your tester shows, or press Simulate. The lab checks each against the usual limits.
Device and readings
Result
Trip time chart
Hydrostatic pressure test simulator
Pick the system and the site condition. The test pressure and duration are set from the usual rule. Press play to run the test: the gauge, the chart and the 3D rig all follow the same clock.
Test gauge
Pressure record
FAT and SAT witness checklists
Pick the equipment and the stage. Record each check as you witness it. The checklist is saved in this browser and prints as a witness record.
Checks
Summary
Engineer's notes
Things that go wrong at witness tests.