Standard Test Conditions - the testing conditions to measure the nomimal output power of photovoltaic cells or modules. Irradiance level is 1 000 W/m², with the reference air mass 1.5 solar spectral irradiance distribution and cell or module junction temperature of 25°C.
STC is the American ASTM, standard E413, equivalent of SRI and is based on the averaged sound insulation achieved between 125Hz and 4kHz. As before, the standard defines a procedure for determining the STC rating for a TLoss spectrum by fitting a contour to the 1/3rd octave data. This procedure involves raising or lowering the contour following these rules:-:- the contour may not be raised above the point at which the Tloss in any 1/3rd octave band falls more than 8dB below the contour. the contour may not be raised above the point at which the total number of deficiencies is greater than 32.
...See Strike Command.
Sensitivity-Time ControlSet Carry Flag
Society for Technical Communication (www.stc.org). See also ISTC.
Short Time Current rating of a CT.
Snap To Connect
Step Timing Control
Short thread and coupling (OCTG casing connection)
Secure Training Centre
The measure of sound stopping of ordinary noise.