In Episode 1 we discuss what sudden pressure is and why it is important to monitor on transformers. In addition, we cover the main features of the electronic RPRR from Qualitrol, the 930. This RPRR offers many benefits over the mechanical version and includes a built in seal-in relay as opposed to other RPRRs that require a separate seal-in relay. The 930 RPRR is capable of mounting to any retrofit transformer, making the switch to the 930 seamless.