SJE Electrical Installations
UPS
Systems
Uninterruptible Power Supply
Data Loss Protection
General ups categories:
Offline: (sometimes referred to as standby)
This method is the least expensive and offers basic backup protection.
When a loss of mains voltage is detected the ups unit will switch to battery
supply, typically within 4 milliseconds.
Depending on load will determine the runtime, usually this will be 10 minutes,
but could be as little as 3 minutes. This should give enough time to power down
computers, or if a backup generator is installed enough time to start the
generator manually, or start automatically.
Online:
The online ups is always connected via the inverter, as such this system is more
reliable as battery condition is monitored and voltage spikes are controlled
giving a 'clean supply
