How do you protect against inductive spikes?
To prevent damage to the power supply from inductive voltage kickback, connect an anti-parallel diode (rated at greater than the supply’s output voltage and current) across the output. Connect the cathode to the positive output and the anode to return.
What is inside a surge arrester?
How does a surge arrester work? A metal oxide varistor (MOV) surge arrester contains a series of metal oxide varistor blocks. These MOV blocks are like a voltage-controlled switch, which acts as an insulator with line voltage.
What causes voltage spikes in a transformer circuit?
The voltage spikes in your circuit are caused by discrete inductors that you’re switching. The leakage inductance of transformers looks like a series inductance with the ideal transformer winding, and that will generate voltage spikes. These discrete inductances are obvious looking at your schematic.
What’s the difference between a voltage spike and a voltage surge?
While these may at first value sound like identical phenomena they are in fact considered rather different, on account of their longevity. A sudden rise in voltage lasting three nanoseconds or more is generally classed as a “voltage surge” while a spike more typically refers to shorter-lived increases in power.
Can a lightning strike cause a voltage surge?
In such situations overhead power cables may find themselves in the receiving end of a lightning strike – leading to a short-term spike in electrical activity for the surrounding properties. There can be few engineers or electricians have not seen the devastating impact that voltage surges can cause.
What causes a short-term voltage surge in a circuit?
Lastly static electricity can build up within a system over time which, when discharged, causes a significant short term voltage surge. The different external sources of voltage surges can differ by region.