Operation 35
Start-up delay
This unit does not have a
Test points (V+, V-)
Test points allow the user to measure the voltage at the point of regulation. A 100 ohm PTC resistor is placed in series with both leads to prevent damage caused by short circuits at the jack terminals.
Indicators
Table 8 - Indicators
LAMP | COLOR | DESCRIPTION |
DESIGNATION |
|
|
RFA | Red/Green | Rectifier Fail Alarm / normal operation |
FAN ALM | Red | Fan Fail Alarm |
Rectifier failure alarm (RFA)
The rectifier incorporates facilities for monitoring its operational status and extends a global alarm upon detection of an internal failure. An abnormal or out of range AC input voltage, an internal fuse failure, any circuit breaker opening, any system or internal shutdown (for example: Thermal or HVSD), or any internal failure causing a disappearance of power switching, will trigger the RFA alarm and light up the RFA LED (color red) located on the front panel. If the disappearance of switching, however, is caused by an incorrect adjustment of the output FLT voltage, resulting in no output load, the RFA will not be triggered since no real failure will have occurred.
Fan failure alarm
Loss of all or part of the cooling system activates the FAN ALM and lights up the appropriate LED on the front panel. An RFA will be triggered, the rectifier will be inhibited and both a FAN ALM and RFA will be generated.
The defective fan cooling fan unit can be ordered and replaced by the customer.
Internal high voltage shutdown (HVSD)
The rectifier is equipped with a high voltage monitor. Whenever the rectifier output voltage exceeds a preset value adjustable from
Helios Rectifier 25/48 Installation and User Manual
