Inductor to control transient currents during energized bond on

Patent metadata

Field	Value
Publication number	US-10974939-B2
Application number	US-201816185433-A
Country	US
Kind code	B2
Filing date	Nov 9, 2018
Priority date	Nov 9, 2017
Publication date	Apr 13, 2021
Grant date	Apr 13, 2021

Abstract

A system and method using at least one inductor operatively coupled to an electrically insulating structure suppresses transient currents generated during a bond-on process by a human worker with energized electrical equipment so as to inhibit passage of the transient currents through the electrically insulating structure operatively coupled to the energized electrical equipment.

First claim

The invention claimed is:

1. A system for use with overhead energized electrical equipment for controlling transient currents generated during bond-on with the energized electrical equipment by a human worker, the system comprising: an electrically insulating structure adapted to carry the worker at a first end of the electrically insulating structure and to position the worker adjacent the energized electrical equipment; at least one inductor operatively coupled to the first end of the electrically insulating structure; and wherein, in use, when the worker is positioned adjacent the energized electrical equipment and is bonding-on to the energized electrical equipment for achieving a common potential with the energized electrical equipment, the at least one inductor suppresses transient currents from the energized electrical equipment to thereby inhibit propagation of the transient currents through the insulating structure.

2. The system of claim 1 , wherein the insulating structure includes at least one insulated section of a boom connected to an aerial lift platform at the first end and connected to a lift system via a second end, and wherein the at least one inductor is operatively coupled to the at least one insulated section at the first end.

3. The system of claim 2 , wherein the operating component is a hydraulic line, a levelling rod or a fiber optic cable.

4. The system of claim 2 , wherein the at least one inductor is a flat conductor.

5. The system of claim 4 , wherein the at least one inductor is laminated onto an outer surface of the at least one insulated section at the first end.

6. The system of claim 1 , wherein the insulating structure includes at least one insulated section of a boom connected to an aerial lift platform at the first end and connected to a lift system via a second end, the at least one insulated section housing at least one operating component which is operatively coupled to the aerial lift platform, and wherein the at least one inductor is placed in series with the at least one operating component.

7. The system of claim 1 , wherein the insulating structure includes at least one insulated section of a boom connected to an aerial lift platform at the first end and connected to a lift system via a second end, the at least one insulated section housing a plurality of operating components which are connected to the aerial lift platform through a connection point and wherein the at least one inductor is placed in series with the connection point.

8. The system of claim 1 , wherein the energized electrical equipment is an energized DC electrical power line having a voltage between 10,000 volts to 600,000 volts, inclusive.

9. The system of claim 8 , wherein when the energized DC electrical power line has a voltage between 200,000 volts to 500,000 volts, an inductance of the at least one inductor is at least 100 Microhenries.

10. The system of claim 1 , wherein the at least one inductor is an air core inductor.

11. A method for controlling transient currents generated during bond-on with overhead energized electrical equipment by a human worker using the system of claim 1 , the method comprising: using the electrically insulating structure, carrying and positioning the worker adjacent the energized electrical equipment; bonding-on the worker to the energized electrical equipment, whereby the at least one inductor suppresses the transient currents from the energized electrical equipment so as to inhibit propagation of the transient currents through the insulating structure.

12. The method of claim 11 , wherein the electrically insulating structure includes at least one insulated section of a boom connected to an aerial lift platform at the first end and connected to a lift system via a second end, and wherein the operatively coupling comprises operatively coupling the at least one inductor to the at least one insulated section at the first end.

13. The method of claim 11 , wherein the insulating structure includes at least one insulated section of a boom connected to an aerial lift platform at the first end and connected to a lift system via a second end, the at least one insulated section housing at least one operating component which is operatively coupled to the aerial lift platform, and wherein the operatively coupling comprises placing the at least one inductor in series with the at least one operating component.

14. The method of claim 11 , wherein the insulating structure includes at least one insulated section of a boom connected to an aerial lift platform at the first end and connected to a lift system via a second end, the at least one insulated section housing a plurality of operating components which are connected to the aerial lift platform through a connection point, and wherein the operatively coupling comprises placing the at least one inductor in series with the connection point.

15. The method of claim 11 , wherein the insulating structure includes at least one insulated section of a boom connected to an aerial lift platform at the first end and connected to a lift system via a second end, the aerial platform including metal components, and wherein the step of bonding-on comprises the worker contacting the energized electrical equipment with a bonding wand and attaching an electrical link between the energized electrical equipment and the aerial lift platform.

Assignees

• Quanta Associates Lp

Inventors

• Bilic Zoran
• Ball David James

Classifications

• H02G1/02 Primary

  for overhead lines or cables · CPC title

• H01F37/005

  without magnetic core · CPC title

• B66F11/046

  of the telescoping type · CPC title

• B66F17/006 Primary

  for working platforms · CPC title

• H01F27/2847

  Sheets; Strips (H01F27/2866 takes precedence) · CPC title