By Linda Moore


Relays are apparatus for switching machines that are used to activate electrical networks remotely. These networks are very high voltage and need care in handling, and people cannot just touch their control components. In fact, these networks are highly insulates, and the relays themselves need to have excellent dielectric environments like special oil and high vacuum.

Companies that specialize in providing these relays provide excellent product qualities because of their engineering, testing and application sets. The HV relay is very important to industry, with large scale uses and applications, and the standards are demanding and exacting. You can track the various kinds of these gadgets through online sites and compare the types in use.

There are several relay types in use today. First, there is the single pole single throw switching that has normally open and normally closed versions. This type of relay is the most direct and common one in use for most applications, an on and off switch simple to use and operate.

The single pole double throw or SPDT offers both normally closed and open switches in one relay. This is used for larger arrays or banks of relays because of the continuity it provides these systems. It has heavier usage, good for large scale production, utility networks, phone company switching banks and other industrial uses.

The double pole or double throw relay or the DPDT contains two double throw relays. These units can compartmentalize any part of a production process or electrical network. This means that a factory, say turn on or shut off one part of its operations for servicing or repair while other processes are still running to complete the complex set.

The relays in question will compartmentalize a very long process. For example, a utility network needs to turn off one part of its operations so that some glitches can be repaired. The DPDT enables engineers and worker to switch off this part while the rest of the network still operates so service to consumers is continuous.

The latching relay is also called the bistable switch and is also applied to continue an operation. Failsafes are set with other types of switches, so they must always be coil charged in order to keep on working, but the latching switch only needs a single short pulse to work. The control system will be able to thus operate other necessary processes when an operation is on or off.

These also work with contactor switches for controlling high inrushes or overloads. These can range from 100Vdc to 1000V switching, so that normal relays will not overheat and blow up. They are the regulators that enable a system to work at maximum capacity without slowing down or having relay problems related to overloads in the system when in operation.

Relays and contactors come in many different kinds of voltage capacities, sizes and shapes to provide stability and safe operational procedures for industrial applications that need high voltage pulses. Each one is configured to address specific processes or volume distribution for all kinds of applications. Getting to know them requires that you know your specifications or switching needs.




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