HV Relay Types And Their Uses

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.

The switches in use are of several types. The single pole, single throw type is one that comes in normally closed and normally open classes. It is the relay that companies use for direct applications, easy to operate with off and on functions found in basic kinds of usage for it.

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.

A relay called the DPDT or double pole double throw uses two double throw switches which makes for flexible controls. The part one DPDT controls with a single arrayed bank will enable a complex industrial procedure to run all the time. A DPDT can shut off one part of it while it is being repaired or is no longer needed.

These relays, for instance, compartmentalize a long automation process. When a part of it needs shutting off because it is no longer needed, the DPDT array in charge of this will be shut off while the rest of the system goes on working. Production costs are therefore kept efficient, while good maintenance is possible.

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.

Contactors or swtiches can be had in different sizes and shapes and load bearing capacities for securing and stabilizing networks on high voltage. Each one is made to up to standards for specific purposes, because specialization varies for all kinds of systems. Therefore, to get at the right relay, you have to know the specs that you need.




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