What is a DC UPS System

What is a DC UPS Systems:

Represents a truly unique and comprehensive solution to providing a secure, uninterrupted DC power source with backup battery. A DC UPS system ensures you will always have DC power when you need it most, and at the same time will protect and maximise the investment made in your backup battery.
A DC UPS system consists of a No-Break DC power supply and battery charger, coupled with a backup battery. The load is therefore carefully regulated and supplied via intelligent circuitry. The system incorporates common sense features providing a vastly improved solution over traditional methods of float charger + battery. The battery is accurately charged, current limited, and the charger cannot be overloaded..

A proper DC UPS system should also have the added capability to regularly monitor the condition of the standby battery and raise an alarm when appropriate. This features provide many benefits including minimising the total cost of ownership.

The following are some of the features that good DC UPS system should incorporate:

Monitoring of the battery status and availability at all times.
Independently limiting the charge current to the battery, thus ensuring load receives priority (most units can have load : charge ratio altered to suit battery size).
Protecting against overload, short circuit and reverse polarity connection.
Deep discharge protection by disconnecting at low battery voltage.
Temperature compensation of battery charge voltage - essential for battery health where ambient temperatures fluctuate.
Alarm contacts to enable interfacing with monitoring equipment such as PLCs, SCADA, security, telemetry and myriad others - standard alarms are DC OK, battery low.
Optionally, performing regular battery condition testing at a predetermined interval and providing an alarm in the event the battery is suspect (currently 250W and above).

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