Burglar Alarm Sounds When Power Cut

To avoid any faults with your burglar alarm it needs to be regularly serviced.

Burglar alarm sounds when power cut.

Of course the alarm can t tell the reason for the mains supply being interupted hence why it sounds when there is an unintentional power cut. We all hear the chorus of alarms if the power in our area is cut off even briefly. All professionally installed and maintained alarm systems must have a fully operational battery back up system that should keep the system operational for at least 12 hours and it should be checked by your maintainer each year. It s also quite possible that the 20 minute limit is disabled with a power cut as well.

So what can happen if you do not change or renew the battery. This is a security feature to prevent burgulars simply cutting power to an alarm to stop it. And i agree it s an absolute nightmare i ve often considered my ladders and a lump hammer when it happens locally. Alarms also commonly go off when the power is interrupted presumably because it thinks that a burglar has cut the power to try and break in.

No is the only answer to this question. When all power is cut including power to alarm systems the number is even higher. This means the back up battery which is meant to keep the alarm running is unable to keep the alarm system running therefore setting the alarm off. Batteries have a lifespan of approximately 5 years and if it is changed during these intervals then your system should not cause any undue false alarms during a loss of power.

An alarm panel is usually provided with backup power by a 12 volt lead acid battery. In less expensive systems nickel metal hydride nimh aa cells may be used. However if your alarm does go off during a power cut there may be a fault with it. 98 of the time an alarm rings during a power cut is because this battery is dead.

The backup battery maintains power to the alarm panel sensors and sounder in the event of a power cut or when an intruder cuts the mains power to the panel. Well after 5 years the battery can deteriorate and could eventually damage the control panel as this unit also operates as a battery.