Functional description 35
HVSD ( high voltage shutdown )
The rectifier monitors itself for high voltage and will shut down when its output voltage exceeds a preset adjustable value ( between
RFA ( rectifier failure alarm )
The rectifier monitors its operation and triggers a global RFA if it detects an internal failure, causing the RFA LED to light up. One of the following will trigger an alarm :
•abnormal or out of range ac input voltage
•output fuse failure
•system or internal shutdown ( thermal, HVSD, TR )
•internal failure causing a power switching malfunction
If the switching malfunction is caused by an improper adjustment of the output float voltage, the RFA alarm will not be triggered. The RFA feature will be activated if the ac power is removed in a system where batteries are present.
SEN FAIL ( sense fail alarm )
This LED lights up if the remote sense leads are not connected, or if the RC fuse has blown.
THSD ( thermal shutdown )
This LED lights up when the rectifier is protecting itself against overheating by suspending its operation for the duration of the high temperature condition. An RFA alarm will also be triggered.
4.2.4.Local and remote adjustments and controls
The current and voltage calibration, adjustment and control can be set through potentiometers and switches ( see Table 11 ) located on the front panel, or by remote signals sent from the controller ( see Tables 8 and 12 ).
Emerson Energy Systems | Rectifier 200I/48 NT5C05C Installation and User Manual |