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.

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.

Here are the relevant types of switches that are commonly used. The first type is also the simplest, known as the single pole single throw switch with normally closed or open kinds. The switching in question offers the most direct system found in many applications, which is the simply use of off and on.

SPDT is something with both on and of options, technically this means single pole double throw, with closing and opening options in one relay. The continuity provide by this is something that is important to operating a system of relays under one control bank. This type of large scale switching apparatus can control industrial production and complex networks of lines for electric or telecom companies.

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.

The DPDT relays are compartmentalized, for example, to operate an automated machining process. When one part of the operation is over, it can be switched off by a bank of DPDTs while other operations continue. Thus it saves money for production processes, or is used for repair and maintenance servicing.

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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