Transformers, breakers & instrument transformers — core substation equipment.
Energize a 50 kVA single-phase transformer, trace core flux and winding heat, and run open-/short-circuit factory tests with fault injection.
Step a balanced three-phase 69 kV supply down to a 13.8 kV bus, comparing vector groups, tap regulation and fault response.
Compare vector groups and neutral connections on a three-phase transformer bank under balanced and unbalanced loading.
Wire wye and delta three-phase connections by hand and see how it changes line and branch voltage, current and power.
Operate an OLTC or DETC tap changer and automatic voltage regulator on a 10 MVA power transformer.
Switch between ONAN, ONAF and OFAF cooling arrangements and trace winding, oil and radiator temperatures.
Charge, close, trip and diagnose a three-pole electronic-trip air breaker, with L/S/I protection tuning and a built-in verification bench.
Open a single-pole contact gap under AC or DC supply and watch current-zero extinction race dielectric recovery against imposed voltage.
Compare an off-load disconnector's visible isolation against a circuit breaker's rated interruption, with interlocks and an absence-of-voltage test.
Adjust primary current, ratio and burden to explore CT saturation, polarity and the open-secondary fault.
Adjust voltage ratio, burden and lead resistance to explore VT phasors, saturation and fuse-failure faults.
Apply feeder faults and follow CT-to-breaker 50/51 overcurrent protection with live time-current curves.