SEL Relay Spreadsheet Template

[budhiman]

Hello All,
I was wondering if anyone has a spreadsheet template of an SEL relay (SEL-751 specifically( one has created with setpoints, I/O mapping and MODBUS mapping which I can use as reference to create one. The reason I ask is to get thoughts on how to present the MODBUS and I/O mapping in a spreadsheet for ease of access and quick reference.
Please share any template any one has created and worked with.

THank you

 

[davidbeach]

Best to build your own. If you have one that presents specific problems in implementation you might get some help. But anybody's spreadsheet is based on a whole set of underlying assumptions that may or may not be true for you but they probably won't be explicitly stated. Besides, if you build your own, you know where its strengths and weaknesses lay. With anybody else's your discover of the weaknesses could come surrounded by lots of green lights...

For the 751, as with many relays, we have a spreadsheet (configuration summary) that defines all of the I/O and all of the logic variables. There is then a standard setting template to go with that spreadsheet. The configuration summary highlights the settings that need to be checked/revised for each position; much of the logic remains unchanged for all positions that use the same template. There are probably as many "correct" approaches as there are entities that regularly churn out settings for a particular relay. What works for one will be ducedly awkward for another.

By the way, DNP turns out to be much easier than MODBUS for getting data from the relays. When we started with the SEL-751A it was all MODBUS; we did a little bit of DNP on transmission but distribution was all MODBUS. I don't think we've installed a new MODBUS installation in many years now; the automation group has gone DNP for everything.