Applications Of High Voltage Contactor

By William McDonald


Specific areas require a specific amount of electric current to operate. For example, to light a large building with numerous rooms, one will need electricity devices which can handle great currents. In similar situations, high voltage contactor must be fitted in such devices. Huge power connectors are turned on and off electronically. The paragraphs below outlines various devices that utilize such.

Connectors have a number of applications. It is paramount to first understand the features of valves before delving into these applications. Contacts have three components. Each of these is designed to perform differently. The first part is known as a coil. Coils are used to power switches on or off. They are coiled to help pass current fast as well as cut it off. Secondly, there is a pole. Poles are suited for transmitting current. Then there are auxiliaries which panel and signals circuit usage.

The first application point is in lighting control. Bigger lighting connections are done in offices, or merchandising buildings require connectors that can withstand great power. Such is sustained by these contacts. They are designed to have two working coils. One is temporarily energized to close connections in valves while the other is used to open switches. Latching strong current connectors are used to prevent a lot of power consumption in the opening and closing coils.

The other usage is in vacuum contacts. These are specialized switches whose valves are compressed in vacuum containers. During transmission, these valves are pushed by suppressing arcs. They become smaller hence occupy little space than before. This makes it possible to transmit huge currents at the same time. Since switches are internal and need no air, vacuum switches can be used in dirty surroundings such as in mining. This is because they can easily move circuit breakers immersed in oil. Likewise, electric signals are easily broken hence applicable in fast lighting elements.

Thirdly, connectors are a common element of mercury relays. Mercury transmitters utilize liquid mercury in transmitting electric current. They are unique since mercury is stored in a properly sealed bottled with insulated inner surfaces. Insulation makes such contacts suitable for cycling surfaces which are prone to corrosion. These transmitters are however being discouraged because mercury is known to be environmentally hazardous.

Another usage is in mercury-wetted relays. These are transmitters whereby valves are first moistened with mercury before use. However, they may not be categorized as contacts due to the amount of voltage used. Normally, they operate on currents below 15 amperes, unlike other circuits.

Next usage is in transformers also known as the camshaft. Sometimes, several contacts may be used sequentially. In such cases, single electromagnets are ineffective thus the need for the camshaft. These camshafts are operated by a power-driven motor or air-filled cylinders. Initially, camshafts were vital in speeding up power-controlled locomotives. Additionally, they are applied in inner combustion machines which are used to control poppet valves.

The last usage is in magnetic starters. Magnetic starters are components used for starting off electric motors. Such devices utilize valves in regulating how much power is transmitted through coils. This way, switches cannot overload at any time. Similarly, they offer automatic breaking in case of power breakage.




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