What is a ground choke?
“Choke” is the limiting of current flow through the grounding electrode. This occurs when a grounding electrode conductor is installed in a ferromagnetic raceway and not bonded at both ends.
How does a choke coil work?
The choke coil works because it acts as an inductor. When the current passing through changes, as AC currents do, it typically creates a magnetic field in the coil that works against that current. This property, known as inductance, blocks most of the AC current from passing through.
What is choke coil explain?
Choke-coil meaning A low-resistance inductor coil used to suppress or limit the flow of alternating current without affecting the flow of direct current, as in applications that require conversion of AC to DC.
What is the grounding electrode conductor?
The grounding electrode conductor connects the grounding electrode to the electrical system. When wind, tree limbs or other influences cause connection between the two different voltage systems, line-voltage surges can occur, causing potential damage to the electrical equipment and the electrical system.
What is the purpose of grounding a raceway?
Ferrous metal raceways must be bonded to the contained grounding electrode conductor to reduce the effects of magnetic fields that are present while the system is energized and in use.
What does a choke transformer do?
Quite simply, a choke is an inductor that sits in high-voltage supply and whose job it is to assist in filtering out any residual hum in the power supply. They normally look like a transformer but only have two leads and can be much smaller.
What is the power factor of a choke coil?
Answer: The power factor of choke coil is nearly zero as phase difference between voltage and current is almost 90.
What is choking coil or choke?
Choke coil is used in fluorescent lamps or tubes, initially it provides a very high voltage and once the gas in the tube is ionized, choke provides a low voltage. Usually it is used to allow DC and blocks AC to pass through the circuit.
Why is choke coil called choke coil?
The name comes from blocking—”choking”—high frequencies while passing low frequencies. It is a functional name; the name “choke” is used if an inductor is used for blocking or decoupling higher frequencies, but the component is simply called an “inductor” if used in electronic filters or tuned circuits.
How are common mode choke coils used to suppress noise?
In common mode choke coils, no magnetic saturation occurs, as flux generated by differential mode currents cancels each other out and disappears. Common mode choke coils are therefore used to suppress noise in power lines through which large currents flow.
How are common mode chokes used in EMC?
A common mode choke has multiple identical coils, and the current flows in these coils in opposite directions, so the magnetic field cancels out in the core. Common mode chokes are also used to suppress interference radiation. Interference currents are reversed in different coils, improving the EMC of the system.
Can a choke coil be spliced in later?
In other words, do not make a choke coil, then splice it in later with PL-259’s and couplers. This will lower the effectiveness of the choke. The choke and the feed coax should all be one uncut piece so the choke is a part of the feedline. Put your PL-259 on the end of the coax that connects to the antenna.
How many loops do you need for a choke coil?
So chill out.) Make between 6 to 10 loops of the coax. Wrap them close together so that the inside measurement of the loops are between 6 to 10 inches across the donut hole. This part is important to remember. You DO NOT have to make each loop side by side in a perfect order.