I believe what the customer is trying to ask is whether the utility interconnection relay (“Utility Mains Decoupling Relay”) manufactured by Deep Sea Electronics is an approved device. I have reviewed the attached data sheet from the manufacturer’s website for the DSEP-100 USA and it does not appear that is has been tested to any of the applicable US IEEE/ANSI standards. Even though I see Deep Sea Electronics has a local USA office in Rockford, IL they are a European company located in the UK. Thus is appears their relays have only been tested to European standards and not any of the applicable US IEEE/ANSI standards. In addition I am not aware of any relays which are manufactured by Deep Sea Electronics that meet the applicable US standards required to be approved as an interconnection relay.
However in reviewing the email string below it also appears that the customer is installing an OutBack Radian GS8048A inverter (8 kW) which is UL 1741SA tested and listed and on the list of ComEd approved inverters. Thus the installation would still meet the requirements to qualify as Level 1 lab certified installation and no other protection would be required even if the Outback Radian inverter is used in conjunction with the DSEP-100 USA interconnection relay. If the DSEP-100 USA interconnection relay however is used with a non-lab certified inverter that is not on the list of ComEd approved inverters than it would not be acceptable. Hopefully that makes sense. The other caveat although it is outside of ComEd’s purview is that the AHJ (Electrical Inspector) may not accept the DSEP-100 USA interconnection relay if it is not an UL/ANSI listed device. To summarize the short answer is the OutBack Radian inverter is lab certified and meets the requirements for a Level 1 interconnection. The Deep Sea Electronics DSEP-100 USA interconnection relay however is not an approved interconnection relay nor does it appear any of the other Deep Sea Electronics relays are approved relays for interconnection. Hopefully all of this makes sense. Please let me know if you have any additional questions or concerns.