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Simple Power Strip Surge Protector Circuit

Simple Power Strip Surge Protector Circuit is like hero for our plugs.

It help protect our devices from big shock of electricity called power surge or spike.

This surge can come when storm happen or when other machine turn ON or OFF.

Inside power strip a special part called MOV take this extra electricity and send it away so our devices do not get damage

So we can put all our device in power strip and do not worry about surprise electric shocks from the wall.

Circuit Working:

Parts List:

CategoryComponentQuantity
CapacitorsPPC 0.1µF 400V1
PPC 4712KV2
MOV 431KD141
SemiconductorsCoil (pair of 20 Turns 22 SWG)1
Fuse1

This circuit is for power strip surge protector, it protect power supply units from bad electricity.

We can find this kind of spike protector in multi socket switchboards which are mostly for computer parts connection.

This circuit help to save electric and electronic things from high voltage spike and transients from power line.

If big spike come in mains line the MOV (metal oxide varistor) in circuit will make short circuit and then fuse will break to stop damage.

Power supply guard circuit have MOV 431KD14, one 0.1uF X2 type AC capacitor, one toroidal transformer and two disc capacitors of 2kV.

MOV is small device made with zinc oxide and other metal oxides like bismuth, cobalt, manganese which is between two metal plates (electrodes).

Each small grain touch other grain and make diode junction and this let current connect in one side only.

When voltage is small with only little current connection very small leakage take place.

But when big voltage flows diode junction break by heat and electron tunnel and then big current can also flow.

Varistor can take some part of surge and protect by how much to protect depend on which varistor and which device.

Formula:

From above circuit diagram we can use formula to find coil inductor value.

Inductor can help to block high frequency spike or remove noise from power line.

The inductive reactance XL of inductor is found by this formula:

XL = 2 × π × f × L

where:

Note:

This formula help to know single part but full surge protector circuit depend on many other things.

Power strip surge protector is made to handle special voltage and surge current level.

Safety is very important when making surge protector circuit.

Its always better to ask trained electrical person and follow safety rules.

How to Build:

To build a Simple Power Strip Surge Protector Circuit follow the below mentioned steps:

Note:

Conclusion:

Simple Power strip surge protector circuit is very important part in power strip.

It helps to save electronic things from big voltage spike and surge.

This circuit uses parts like metal oxide varistor (MOV) to send extra voltage to ground and this way our device do not get damage.

References:

Surge protector

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