Friday 10 February 2017

HV Relay Types And Their Uses

By Linda Moore


Relays are machine switching apparatus that are used for activating a network or system with a remote signal. This takes out the need to manually handle high voltage setups usually associated with electrical cabling or wiring. These setups are highly insulated and these are often set in media that have greater dielectric values, like transformer oil, high vacuum environments and such.

There are companies that are specialist manufacturers of relays and have excellent sets for testing, engineering and application for their products. The HV relay is a gadget that industry relies on, with very large values for application, the ISOs for it being of very high and demanding qualities. Get to know the various types online and see how they work.

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 DPDT or double pole double throw system is something used for systems that need constant switching. It has two double throw units operating in the relay and thus provides on and off qualities hermetic to its operation, only applicable to one part of a system. This is also used in large production or networked facilities.

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.

Latching or bistable switches are also useful for continuous operations. When all other types of items have failsafes that require them to have continuous coil power for the switch to be at the on configuration, the bistable system needs only a momentary pulse. This means that monitoring and control can turn this switch on or off as needed when it needs supplementary processes.

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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