what's function of AMF?

Originally Posted by fredbals

what's function of AMF?

A little more detail would be helpful, but I'de guess your talking about "Automatic mains failure". So this would involve an automated back up system i.e.-
Generator or Battery backed up in the case of a mains failure !!!!!

...or the OP could mean EMF and have a lecturer with a speach impedement?

Originally Posted by fanta

A little more detail would be helpful, but I'de guess your talking about "Automatic mains failure". So this would involve an automated back up system i.e.-
Generator or Battery backed up in the case of a mains failure !!!!!

backed up ... so it can use high voltage device for back up? anyway can u give me link how to study that device for trouble shooting.. thnx

Impossible for a link, far too many different scenarios, amf means - auto mains failure - depending on what your automating makes a big difference.
The device is quite simplistic, you can auto change milli volts or 1000's of volts, but don't get the two mixed up!

Normally speaking, it means swapping like for like, like a genset or battery backup.
Where the coil is fed n/c or sometimes n/o, if normal power fails then the contactor drops in (or out, if backed up).
Which in turn sends a signal to the backup power source, to either start or cut depending on the configuration. AMF contactors usually means neither can be functional at the same time, mechanical and electrical safety devices makes that impossible, you have one or the other, never both at the same time. In the normal everyday world amf is usually associated with mains generators but it can be used in pc logic

so wats the main function of AMF?

to restore power once it is lost

Oh dear, I rest my case with supposed ' Electricians Forum'. some guys are helpful - but in all honesty why did you post here? Are you a 'tester' -

Originally Posted by wattsup

Oh dear, I rest my case with supposed ' Electricians Forum'. some guys are helpful - but in all honesty why did you post here? Are you a 'tester' -

im not a tester i just want to know wat's the function of this gangets... thnx

gadget lol