High Voltage Products and the Direct Current Voltage Test

High voltage products require an interesting mix of science and engineering in order to withstand the forces that that are applied to them. When moving very high voltage electricity around the country, it is vital to have equipment that can withstand the rigors that are placed upon them. There is a range of high voltage products that are worth mentioning here. However, this is merely a brief summary as each individual component is certainly worth discussing in a greater amount of detail.

There are a number of switchgear units which are designed to be able to cope with very high voltages.

These include air-insulated switchgears, gas-insulated switchgears, as well as other hybrid switchgears which are designed for specific purposes. Other items worth mentioning include generator circuit breakers, disconnectors, and instrument transformers.

Surge arrestors are a crucial piece of equipment when dealing with high voltage electricity. Because the levels in a cable can vary at certain times, a surge can actually cause a huge amount of damage to other electrical equipment, and can result in whole circuits having to shut down. Surge arrestors are able to control the surge in order to prevent the damage that might have occurred. Instrument transformers are utilized for a variety of applications, including revenue metering, insulation, as well as protection and control services.

When dealing with insulation, long-rod insulators, made of silicone, have been used on certain 550kV overhead power lines. Disconnectors also have a range of applications, and can be utilized on lines anywhere from 72.5kV up to a massive 800kV. There are a range of coil products that are manufactured by the electrical manufacturing companies, in addition to the variety of other smaller components that are manufactured specifically to deal with high voltages.

For electrical engineers, a direct current voltage test is something that must be performed from time to time.

In essence, these are pressure tests that are conducted on high voltage cables. While many cables operate on AC, for numerous reasons the AC testing is not possible, which is why DC testing must take place. More often than not, a DC test will be comprised of half wave rectification, and will typically make use of HV selenium rectifiers. You might have heard about doubling and multiplier circuits. These types of circuits are used in some simple household appliances, like in television sets, but also have high voltage applications.


6 Factors To Consider When Buying A CD Player

For you to play your favorite music in your car or house you need to have a good quality CD player. For ideal results you need to buy the right player. To help you out here are some of the factors that you should consider in order to buy the right player:

Power Supply

The power supply greatly affects the quality of sound. For high quality sound you should go for a player with large toroidal power transformers. The large transformers will ensure that the power supplied to the player is enough to produce high quality sound with minimal noise.

Disc Transport

To minimize vibration and ensure that the sound produced is of high quality you should go for a player with sturdy transports. You should note that disc transport is the disc drive; therefore, you should ensure that the CD player has a sturdy disc drive.


This is the enclosure that protects the internal components of a CD player. To prevent vibrations you should go for a chassis that is rigid and reinforced. It’s also wise that you go for a chassis that has a double-plated top or bottom panel.


Although, most CD players have RCA stereo outputs, there are a few that have balanced XLR outputs. Using the outputs you can connect amplifiers and preamplifiers thus increasing the quality of your sound. The good thing with the balanced connections is that they transmit low-noise signals which ensures that the sound produced is of high quality.

Disc Capacity

There are two types of disc capacities that you can go with: single or multi-disc capacity. If you love loading many CDs and have them running on shuffle play, you should go for a multi-disc player. Although, multi-disc players will allow you to play many CDs, they are more expensive; therefore, you should be prepared to part with a large amount of money.

Track Programming

Would you like to make your own playlist? You should go for a CD player with track programming. With track programming you will not only be able to create your own playlist, you will also be able to skip your least favorite tracks. This feature is of great importance to you if you have a multi-disk player.


These are some of the features that you should consider when buying a CD player. In addition to the above features, you should also ensure that you make your purchase in a high quality store.