Testing of High Potential Voltage Cable Discharge Arc Using a Cylindrical Vacuum Chamber

Testing of High Potential Voltage Cable Discharge Arc Using a Cylindrical Vacuum Chamber 01
Testing of High Potential Voltage Cable Discharge Arc Using a Cylindrical Vacuum Chamber 01
This cylindrical vacuum chamber is utilized for testing high potential voltage cables for potential discharging at higher altitudes. Since air is acting as an insulator at sea level, no electric discharge is present at lower altitudes. However, once the pressure is decreased as a result of higher altitudes, less air is present to act as an insulator. This creates a problem because if an electric discharge happens, it can result in catastrophic failure of electrical components, especially if these components are critical. It is therefore very important to test these cables for discharge by using a vacuum chamber to simulate an air pressure at higher altitudes. The vacuum requirements for this test where only to go to 35,000 feet pressure equivalent which is about 165 Torr.

Our client provided us with a the test cable, which is a high voltage cable. The requirements were to test only one section of the cable. The challenge here is due to the fact that the test cable has various diameters and therefore a sealing plate must be designed to accommodate the proper thickness at which the cable is to be tested.

What you see here is a cylindrical vacuum chamber about 60 inch long and about 10 inch Inside Diameter. The rear of the chamber has the door clamped against the rear wall. We provided our client with the rear door for easier access to the chamber from the back. The front on the other hand, has a sealing plate that is specifically designed to have a double sealing O-Ring which seals again the sealing plate and against the inside of the Hi-Pot Cable. As soon as the Cable and the O-Ring are in place, the vacuum can be pulled and a pressure of 165 Torr is achieved within minutes. Now the cable can be tested for discharge and a safe airplane component can be successfully tested and made. You can see a video going a little bit more into detail about how this vacuum sealing mechanism works and how a part of the cable is used for testing purposes.

Video of the Setup

You may be interested in some of our other items

We make Robustly Designed and Quality Engineered Systems. Check out some of our other items we carry that you can combine/integrate with your systems or projects.

Vacuum Chamber and Pump Systems
Our Vacuum Chamber and pump systems are fully setup and ready to go. What you get is a vacuum chamber, a vacuum pump, and connection hardware. We carry acrylic or metallic vacuum chambers and a whole range of vacuum pumps from Rotary Vane, Piston, or Venturi. What type of vacuum chamber and pump system you want depends on your project requirement, budget, and other specifications.
USB Vacuum Feedthroughs
USB Vacuum Feedthroughs are 2.0 USB ports which enable you to run a USB signal into the vacuum chamber during vacuum and pump-down operations. You have several options on what type and size of USB ports you are looking to add to a vacuum chamber.
Our Work: Leak Quality Testing and Quality Control of Packets
Quality Control during Production runs is a very important procedure you must perform on your manufactured products. This is especially critical is you are an FDA manufacturer where regulatory compliance is important and necessary. Our Vacuum Chambers are specifically built to assist you meet your Quality Control and Regulatory compliance needs.
Related Articles: High Altitude Package Testing utilizing an Acrylic Vac Chamber
An Acrylic Vacuum Chamber can be used to simulate elevation very reliably to altitudes up to 60.9 km or 200,000 feet. This provides several advantages over other testing methods as acrylic is transparent and enables full view of interior during testing. In this article, we will give you a through guide on what can be done to eliminate the risk of packaging damage during shipments at high altitudes.