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Load switching allows you to connect devices to our stats that require a higher level of power than the stats has been designed to cope with.
For example you may wish to use a 3kw heater on a stat with has a maximum rating of 2.4kw.
This is easily solved by using a technique called load switching and essentially involves connecting up a secondary relay to the stat. So basically the relay that's built into the stat is used to control a more powerful secondary relay that you wire up. Your secondary relay is then used to control your device directly.
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∙ 11y ago
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What is on load and off load switching?
On load switching is when a switch can be operated whilst current is still passing through the switch (i.e. it is on load) Offload switching is when a switch is operated whilst there is no current through the switch (i.e. it is offload)
How can you minimize the heat load on a primary switching center?
place the unit in the shade
The load interrupter switches of the primary switching center can be operated when the circuit is energized?
true
What are the positions of the primary switching center load interrupter switch?
closed-open-grounded
The load interrupters of the primary switching center provide internal grounding for?
all three of the phases
What is on-load tap-changing?
On-load tap-changing is done in electric power supply systems to maintain the supply voltage to customers within limits. Tapping is done by switching extra turns in or out, usually on the high-voltage winding of a transformer. The switching is done by a make-before-break switch to avoid excessive sparking in the transformer, and this enables the switching to be done without interrupting the supply.
Which wire will be connect at NO or NC contact?
NO stands for Normally Open and NC is Normally Closed. It references a switching application. It is the base state of the switch. So if the load is connected to the NC terminal it will usually be energized and when the switching device is activated the circuit will open and the load will be de-energized. The NO terminal would have the load de-energized until the switch was activated and then it would be energized.
The Primary Switching Center three-position load interrupter switches provide a visible gap when open?
True
The occasional inspection of the primary switching center switchgear and exercising the load-interrupter switches and fault-interrupters is recommended?
true
What is process switching?
Process switching is an operation that provides full route evaluation and per-packet load balancing across parallel WAN links. Process switching involves the transmission of entire frames to the router CPU, where they are repackaged for delivery to or from a WAN interface, with the router making a route selection for each packet. Process switching is the most resource-intensive switching operation that the CPU can perform.
Would you put an electric switch on a neutral wire?
NO! Never switch the neutral, just switch the hot. You would be creating a shock hazard. Switching neutral leaves live voltage at the device even when it appears off. Someone touching the hot and grounded would get a shock.
What is the working principle of a solid state relay?
It is an electronic switching device which controls larger load currents from small currents inside them.
