Thermal: top oil and hot spot vs. load
IEC 60076-7 steady state at the live mean ambient, SGB-SMIT DOTML 1000 kVA (R = Pk/P0 = 11.0, Δθor 60 K, H·g_r 27.6 K, x 0.8, y 1.6). Dots: measured top oil at the 3-h equivalent load and measured hot spot (WTI) at the present load. Red lines: normal cyclic limits.
Top oil (IEC)Hot spot (IEC)Measured (trail)
Dissolved gas: Duval Triangle 1
%CH4, %C2H4 and %C2H2 of their sum, from the online DGA monitor (IEEE C57.104-2019 6.2.3). Applied only once a gas is above its normal level; until then the point is grey. PD partial discharge, T1-T3 thermal faults, D1/D2 discharges, DT mixed.
Live (trail)
Transformer bay
MV supply, HV bushings, core and windings in the oil-filled hermetic tank, LV bushings and the LV board, with live sensor values. Red = beyond the twin's alarm limit.
Condition sensors
Bars against the alarm limits in the twin file (red line).