Abstract: An apparatus for power monitoring and voltage suppression comprising a reference node, a first transformer, a second transformer, a third transformer, a resistive element, a ground fault indicator, a current detector, a power quality meter, and a meter power supply is provided. The transformers have first sides and secondary sides, with the secondary sides connected in series. The resistive element and the ground fault indicator are connected in parallel to the secondary sides of the transformers. The circuit connecting the secondary sides, the resistive element, and the ground fault indicator is not electrically connected to ground.

Abstract: An apparatus for power monitoring and voltage suppression comprising a reference node, a first transformer, a second transformer, a third transformer, a resistive element, a ground fault indicator, a current detector, a power quality meter, and a meter power supply is provided. The transformers have first sides and secondary sides, with the secondary sides connected in series. The resistive element and the ground fault indicator are connected in parallel to the secondary sides of the transformers. The circuit connecting the secondary sides, the resistive element, and the ground fault indicator is not electrically connected to ground.

Abstract: Phaseback DC choke includes a common core, a first coil formed about the common core, and a second coil formed about the common core in parallel opposing configuration relative the first coil. A DC circuit including a Phaseback DC choke is also provided.

Abstract: Phaseback DC choke includes a common core, a first coil formed about the common core, and a second coil formed about the common core in parallel opposing configuration relative the first coil. A DC circuit including a Phaseback DC choke is also provided.

Abstract: Three single-phase transformers having primary sides connected in a delta connection and the secondary sides connected in a series-delta connection. Each power line is connected through a fused disconnect to two primary terminals, each primary terminal on a different transformer. A second terminal on the secondary side of the first phase transformer is connected to a first terminal on the secondary side of the third transformer through a non-inductive grid resistor. The second terminal on the secondary side of the third transformer is connected to the first terminal on the secondary side of a second transformer. The second terminal on the secondary side of the second transformer is connected to the first terminal on the secondary side of the first transformer. In this fashion, the secondary sides of each of the single-phase transformers are connected in series through a non-inductive grid resistor.

Abstract: Three single-phase transformers having primary sides connected in a delta connection and the secondary sides connected in a series-delta connection. Each power line is connected through a fused disconnect to two primary terminals, each primary terminal on a different transformer. A second terminal on the secondary side of the first phase transformer is connected to a first terminal on the secondary side of the third transformer through a non-inductive grid resistor. The second terminal on the secondary side of the third transformer is connected to the first terminal on the secondary side of a second transformer. The second terminal on the secondary side of the second transformer is connected to the first terminal on the secondary side of the first transformer. In this fashion, the secondary sides of each of the single-phase transformers are connected in series through a non-inductive grid resistor.

Abstract: Three single-phase transformers are provided, the primary sides connected in a Wye configuration. One terminal on the primary side of each transformer is coupled to a reference node and the other terminal on the primary side of each transformer is coupled to one phase of the power supply bus. The secondary sides of the transformers are connected in a delta configuration through a resistor. The circuit connecting the secondary sides of the transformers is not electrically connected to ground.

Abstract: Three single-phase transformers are provided, the primary sides connected in a Wye configuration. One terminal on the primary side of each transformer is coupled to a reference node and the other terminal on the primary side of each transformer is coupled to one phase of the power supply bus. The secondary sides of the transformers are connected in a delta configuration through a resistor. The circuit connecting the secondary sides of the transformers is not electrically connected to ground.