SEL300G Commissioning
SEL300G Commissioning
(OP)
We are qouting some work which requires generator protection testing as part of the package. The relays used are SEL300G.
I have no expererience testing gererator protection but have experience commissioning line, feeder, bus and transformer protection.
If anyone here has any experience testing these relays I would appreciate a suggestion as to how long the relay alone should take to commission. I understand there are many variable involved. I am just looking for a ball park estimate considering a relay with many utilized functions and settings.
Thanks
I have no expererience testing gererator protection but have experience commissioning line, feeder, bus and transformer protection.
If anyone here has any experience testing these relays I would appreciate a suggestion as to how long the relay alone should take to commission. I understand there are many variable involved. I am just looking for a ball park estimate considering a relay with many utilized functions and settings.
Thanks






RE: SEL300G Commissioning
In general a commissioning test of a new relay should follow the book, then a test of all the inputs, outputs, and metering. Also testing of the attached systems. Some settings require the unit to run to do the measurments. Some calculations, and adding the settings to the relay.
This can also depend on the number and placment of your test switches.
In general, a few days for the commissioning test, a few days for the attached systems (depending on your waiting time between tests), some time to put the unit on-line. Some time for measurments (after the unit has been on line).
You should get some idea from this.
The worst part is finding they haven't connected something yet, and you have to wait.
RE: SEL300G Commissioning
RE: SEL300G Commissioning
RE: SEL300G Commissioning
If you have to program the sequence of event reports, alarm systems, communications, that can take some time; especially if you have to troubleshoot communication problems.
I've typically seen a generator relay take about 3-4 days, depending on how many questions and the familiarity of the engineer with the relay and the quality of the setting calculations and documentation.
RE: SEL300G Commissioning
If you do secondary injections into the relays, that is a lot of testing, usually 1 week, then plan for some online time to tune in the 64S style functions against third harmonic readings, and a day of load readings.
RE: SEL300G Commissioning
Alan
"The engineer's first problem in any design situation is to discover what the problem really is." Unk.