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Surge

Surge Arrestor Circuit with Measuring Facility

Last Updated on January 2, 2024 by Swagatam 22 Comments

surge

In this post I have explained about a simple surge voltage protector circuit using a fuse and a triac crowbar circuit and also learn the method to record and measure the last maximum surge that could have destroyed the specified load in case the protection was not introduced. The idea was requested by Mr. Akram. […]

Filed Under: Voltage Control and Protection Tagged With: Arrestor, Facility, Measuring, Surge

High Power Industrial Mains Surge Suppressor Explored

Last Updated on January 3, 2024 by Swagatam Leave a Comment

highenergyvaristor

In this post I have explained a high energy surge suppressor circuit using high capacity industrial MOVs for suppressing high current mains surges in industrial electrical lines. The Circuit Problem: I’ve been reading a lot of your design ideas and I am extremely impressed with your designs. I don’t have anywhere near your level of […]

Filed Under: Voltage Control and Protection Tagged With: High, Industrial, Mains, Power, Suppressor, Surge

How to Test a MOV (Metal Oxide Varistor) Surge Protector Device

Last Updated on August 1, 2024 by Swagatam 29 Comments

movtestsetupcircuit

In this article I have explained a set up for testing MOVs which are special devices specified for absorbing instantaneous high surge currents that may accidentally occur in our mains electrical lines. The idea was requested by Mr. Kevin  Technical Specifications  I’m Kevin Montañez, a university Electrical Engineering student here in Cebu, Philippines. As I […]

Filed Under: Voltage Control and Protection Tagged With: Metal, MOV, Oxide, Surge, Test, Varistor

Using an NTC Thermistor as a Surge Suppressor

Last Updated on January 2, 2024 by Swagatam 166 Comments

ntc 2

A Negative Temperature Coefficient (NTC) thermistor is a device which is able to suppress switch ON current surge due to its initial higher resistance at room temperature. However, as the NTC suppresses the initial surge current, it warms up causing its resistance to drop to nominal levels and this in turns allows the current to […]

Filed Under: Voltage Control and Protection Tagged With: NTC, Suppressor, Surge, Thermistor

Surge Protected Cheap Transformerless Hi-Watt LED Driver Circuit

Last Updated on January 2, 2024 by Swagatam 114 Comments

The increased number of complaints from the readers regarding burning LEDs associated with my earlier posted transformerless 1 watt LED driver circuit, compelled me to solve the issue once for all. The power supply section of the circuit discussed here remains exactly identical to the previous configuration, except the inclusion of the “switch ON delay […]

Filed Under: Power Supply Circuits Tagged With: Cheap, LED, Protected, Surge, Transformerless, Watt

AC 220V/120V Mains Surge Protector Circuits

Last Updated on November 10, 2024 by Swagatam 174 Comments

Simple Mains AC Surge Protector Circuit Diagram2C Image

Voltage spikes  can sometimes be a big nuisance as far as the safety of the various electronic appliances are concerned. I have explained how to make a simple AC Mains surge protector circuits at home. What is a Surge Protector A surge protector is an electrical device which is designed to neutralize minor electrical spikes […]

Filed Under: Voltage Control and Protection Tagged With: 120V, 220V, AC, Mains, Protector, Surge

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