Crude oil desalter problem:
It is observed that during normal running of Crude oil desalter(2 stage in series), the Amperage increased from 45 to 90Amp. It was also checked that there is no water shot with crude(i.e. < 500PPM H2O). Immediately wash water stopped, still current doesen't comes down. Hence, wash water resumed and observed current at higher side. Evev, the crude oil type processed is also the same as earlier. What could be the reason for high current and suggest solution to bring down current?