... been fundamentally improved. The Golden Triangle company developed S13-M-RL, S11-M-RL series three-dimensional triangular core power transformer which ... noise down 8dB (A) ~ 13dB (A)> Compared with the S9 transformers with same capacity,no-load loss dropped 50%,load ... error in accordance with the different performance indicators. > S7, S9, S11-M.RL allow deviation standard: The total loss of +10%, no ...