RFI SME240-1 2-20, Руководство пользователя

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When a mains failure occurs, the power supply no longer provides power. The battery
now supports the load without interruption of the load. Restoration of the mains restarts
the power supply which will resume support of the load and charging of the battery.
During extended mains failures the unit disconnects the battery before it becomes
excessively discharged. The battery is automatically reconnected when the mains
recovers. This feature contributes to long battery lifetime and allows unattended operation
of a system.
Protection
The power supply incorporates the following protection features
• Reverse polarity connection of the battery will not cause damage to the power supply or
the battery and the output load will remain unaffected.
• Electronic battery fusing is provided in series with battery connection to protect the load
and power supply when it is powered from the battery.
• Accurate current limit protection is provided for both load and battery. Automatic
recovery from short circuit is provided with no current tailing in short circuit operation.
• Over voltage protection provides shutdown of power supply.
• Inrush Surge limiting at turn on.
• OTP over temperature protection for blocked fuse incorrect install.
Battery LVD Operation
A low voltage disconnect (LVD) is provided to prevent deep discharge of the battery.
LVD Operation
When mains has failed and the battery is supporting the load, the battery must be
disconnected from the load if its voltage falls below the following levels:
Model
Battery Disconnect Condition Validation time ±30%
(LVD_Disconnect)
SME240-1 2-20 1 0.25 V ±0.25 V 1 .8 sec
The battery will be connected to the charger/load output when its voltage rises above
the following levels:
Model Battery
Connect Condition Validation time ± 30%
(LVD_Reconnect)
SME240-1 2-20 11 .90 ± 0.30 V 2.3 sec
The battery disconnect is incorporated into the Bve line.
The BATTERY output has protection incorporated against a reversed battery connection.
A reversed battery is left disconnected so that the LOAD output can still run the load from
mains power. The quiescent current drain on the battery when the main has failed is less
than 3 mA.