Shunt capacitor switch with an impedance insertion element
AssigneeSiemens Energy & Automation, Inc.
InventorArthur D. Crino
Life of this patent
Estimating the term…
Abstract
A high voltage switch for switching capacitor banks in and out of a circuit. The switch includes two sets of contacts to perform the switching function. An impedance element is connected in parallel with one set of contacts. Upon closing of the switch current is caused to flow through the impedance element and one set of contacts, thereby preventing the switch from functioning as a short circuit. Subsequently, the second set of contacts engages and the switch can function as a short circuit to completely switch a capacitor bank into the circuit.
Claims20
A high voltage shunt capacitor switching apparatus comprising:
- an insulating tube means having a first and a second terminal means, the terminal means communicating with the internal portion of the insulating tube means;
- a first electrical contact means in electrical contact with the first terminal means;
- a second electrical contact means;
- a third electrical contact means for electrically engaging the first and second electrical contact means and adapted to move relative to the first and second electrical contact means;
- volume of insulative gas;
- a third terminal means, the third terminal means communicating with the internal portion of the insulating tube means, wherein the insulating tube means includes a first and a second tube section, the second electrical contact means being in electrical contact with the third terminal means, the third electrical contact means being in electrical contact with the second terminal means and the first, second and third contact means being disposed within the insulating tube means;
- and
- an impedance means coupled between the second electrical contact means and the third electrical contact means such that current can flow through the shunt capacitor switch when the second electrical contact means is disengaged from the third electrical contact means.
A high voltage hunt capacitor switching apparatus comprising:
- a first insulating tube including a first and a second terminal, the terminals communicating with the internal portion of the insulating tube;
- a first electrical contact disposed within the first insulating tube in electrical contact with the first external terminal;
- a second electrical contact;
- a third electrical contact for electrically engaging the first and second electrical contacts and adapted to move relative to the first and second electrical contact;
- a volume of insulative gas;
- a second insulating tube having a third external terminal, the third external terminal communicating with the internal portion of the second insulating tube, the second electrical contact being in electrical contact with the third external terminal and disposed within the second insulating tube, the third electrical contact being in electrical contact with the second external terminal and disposed within the first and second insulating tubes;
- and
- an impedance means in electrical contact with the second electrical contact and the third electrical contact such there is a flow of current through the shunt capacitor switch when the second electrical contact is disengaged from the third electrical contact and the first electrical contact is engaged with the third electrical contact.
Dependencies are inferred from the claim text.