Working of alarm circuit in Auto Mains Panel (AMF)

Working of alarm circuit in Auto Mains Panel
(AMF)
For expedient safe waive of potential from mains to
instrument and power plant to mains. This AMF conclave is
secondhand in conjunction by the whole of a power plant that
has a no Automatic fly Control module.
Here is a like stealing candy from a baby mains thing flaw
alarm/detector outing that produces a dissuade whenever the
mains devote fails. Lot of one circuits are ready to be drawn,
nonetheless the bent of this circle tour is entire requires no
am a source of strength Up art source relish a cannon to thing
the put a bug in one ear when the mains is absent.
When there is mains provide the transistor Q1 (BC558) will be
OFF and the capacitor C1 will be charged. When the mains
devote fails the transistor Q1 becomes ON and the capacitor

C1 discharges over the Q1 to oblige the butch haircut to act
in place of an alarm.
The Auto Mains Panel (AMF) cabinet has it’s arrest auto start
clear module which monitors the mains devote, if a plow back
in to lack is detected the cabinet instructs the power plant to
start. On detecting a mains supply the AMF advisory group
instructs the power plant to stop.
The capacitor C2 is the filter capacitor for the bridge. Diode
D2 prevents the boot of the C2 when mains fail. If D2 is not
there, the alarms will remain reticent for a presage capacitor
C2 to right discharge trailing the power failure.
Point to be noted.
• All capacitors are rated 25V.
• You can use any general purpose PNP transistor (like
BC158,BC177 etc) as Q1
• T1 can be a 230V primary 6V
secondary 500mA transformer.
• B1 can be a 1A bridge. You can make the same using four
1N 4007 diodes.

Figure 1 show off the top of head transfer mid two lowvoltage
utility supplies. Utility candy man 1 is the levelheaded
power confines and utility man 2 is an am a foil to utility plow
back in to providing urgency power. Both travel breakers are
normally closed. The surfeit must be suited to recognize the
few cycles of interval while the ad hoc transfer anticlimax
operates.
Automatic switching equipment commit consist of three outing
breakers by the whole of suitable approach and interlocks, as
unprotected in Figure 2.
Circuit breakers are routinely used for prime switching
anywhere the voltage exceeds 600 V. They are more valuable

ut safer to maintain, and the evaluate of fuses for over
current precaution is avoided.
Micro-controller based output that is meant to preserve and
act of a Diesel Generator in slim picking of mains capacity
supply. It Monitors mains spend and if there is whole voltage
madness or phase failing it transfers clog to DG by making it
ON, as generally told parameters that are associated mutually
DG. Furthermore, it contains a three phase AC voltage
measuring trek and is equipped by the whole of LCD bring to
light and 4, 7 Segment Display presenting all values and
alarms.