| 摘要 |
<p>The driving carrier wave generator GB and the replacement carrier wave generator GE arranged in a parallel circuit to the transmission network lines. Each generator has a switch (Ca1, Cb1) comprising one contact of a relay (R1, R2) of which the other contact (Ca2, Cb2) is a switch link to the phase bus-lines through terminals (u, v, w, x, y, z). The switching relays are in series with control relays (CA, CB) with an earthed terminal each, through ohmic resistors (R1, R2). Incorrect switching is prevented by guard relays (UA, UB), with associated contact pairs (ua, TA); (uB, TB).</p> |
