September 14, 2023
RECTIFIER FAILURE – CASE STUDY
EVENT REPORTED by SAM GUARD®
SAM GUARD® detected increase in Rectifier temperature in the Electrolysis unit from 17°C to 23°C.
There was no change in the voltage of the rectifier and was under normal values.
Rectifiers are used along with transformer to convert grid ac voltage to dc voltage in the electrolyzer cells.
MAINTENANCE TEAM FINDINGS
Increase in temperature will affect the theoretical voltage of the electrolytic reaction and cab cause an increase in the overall potential provided by the power supply.
The on-site inspection after the alert showed a problem in the air condition system and was immediately forwarded to maintenance.
COST / DOWNTIME AVOIDED
Earlier alert helped with finding eventual electrolysis failure and avoid major shutdowns .
“A rectifier failure would have caused failure of direct voltage to the electrolyzer and eventually a electrolyzer failure.”