Mains power trip switch?

thank u PbR ,
yes as Suhas said 1 556 Ic should suffice! but 555 is 7Rs 556 may be 12Rs, so not tht big deal with 2 pieces of 555..verroboard 4X8cm will be 10Rs and should accommodate all the stuff except relay,which may be Mounted on the cabinet box.
For mass production of the unit 556IC will be economical.


Test your relay with the ckt , if it needs a higher current ,
1 transistor[BC 548] is needed to drive ,

see relay circuits with 555 on internet u will get that relay driver !



----------------------------------+ 9v
... ....................|
.......................||c
.......................||c Relay 9v
.......................||c
........................|
.......................|D| diode -> check online ckts
....................... |
from
pin3..27k.. b..../c
-|~~~~|----| BC 548
... ... ..... ..... . \e
..... ... ...... .... .|
...... ... ..... ... ._Gnd


in that case the pin 3 will go to a resistor,relay coil one end connects to collector and other +ve rail,emitter grounded.

Pls dont go for an electronic circuit for such a simple requirement. What you can do is buy a single phase contactor, connect the mains on one side and the load on the other side. Now feed power to the contactor through a N/O micro switch. Wire the contactor in such a way that the switch has to be pressed to get the circuit complete. Once the contactor gets activated use the same for completing the circuit..

This approach will eliminate the dependancy of having an electronic circuit which make things complicated.

Thanks to all who responded...It will keep me occupied for some time!!

Rgds