Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

Varistor for transformer protection

Status
Not open for further replies.
K

Kick

Full Member level 6
Joined
Sep 27, 2010
Messages
344
Helped
16
Reputation
32
Reaction score
15
Trophy points
1,298
Location
India,Bangalore
Activity points
3,170
Hiii all,

I am just confused with parameters of Varistor, Varistor Voltage and Maximum AC Volts. What I want is,I need to add one varistor for 230V transformer protection(Voltage spike). I think this transformer can not carry more than 230V (according to datasheet).So Which parameter should I choose?
 

Attachments

  • sd.png
    sd.png
    20 KB · Views: 73

Varistors or VDRs are intended to protect electronics only from voltage spikes.
A well designed 230 V transformer must work at the maximum value of 253V (230V + 10%). Tipically across a 230V mains is used a varistor rated at 275V an example could be the Epcos S14K275. (**broken link removed** ) This component has a diameter of 14 mm, the diameter is an important factor because greater the diameter of varistor greater the energy (of the spike) it can manage.

Stefano
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top