Abstract:
The invention concerns a high voltage transmission wire or cable for transmitting AC or DC power between two points. Preferably at least one point is connected to one or more power networks. The conductor of the wire or cable comprises a semiconducting outer layer (10) including distributed magnetic particles. Other embodiments include an insulation layer (12) including distributed magnetic material, micro-particles, ribbons tapes etc, and an insulation screen. The invention increases the distance over which power may be transmitted and/or eliminates the necessity for power compensation reactors partially or totally. This is achieved by increasing inductance and reducing AC capacitance leakage currents in AC lines and, when operated as a DC line, by reducing high frequency harmonics.
Abstract:
A diverter switch with an operating member and an electric circuit. The electric circuit has a main branch and a resistance branch connected in parallel with the main branch. Each branch includes a contact and a vacuum switch. The resistance branch also includes a resistance. The main rotary selector contact is always operated before the resistance contact. The operating member is arranged, during operation, always to rotate the main contact in one and the same direction of rotation. Also a corresponding method for operating a diverter switch and use of such a switch.
Abstract:
The drive circuit for the motor coil includes at least one branch point with an electrical energy bank and a thyristor connected in series with the coil.
Abstract:
The drive circuit for the motor coil includes at least one branch point with an electrical energy bank and a thyristor connected in series with the coil.