Commissioning test for Generator relay
Commissioning test for Generator relay
(OP)
The relay has following funtions: distance, v/hz, synch check, auto synchronism, undervotlage, reverse/forward power, loss of field, negative sequence, overcurrent, time over current, over voltage, stator ground fault, out of step, frequency relay, current/ground differntial.
Should we write in literature/ manual of the relay how to perform commissioning test for all the functions. Does any body test these funtions in the field? what are the critical commistion test for the relay?
Should we write in literature/ manual of the relay how to perform commissioning test for all the functions. Does any body test these funtions in the field? what are the critical commistion test for the relay?





RE: Commissioning test for Generator relay
The test procedures are usually provided by the relay manufacturers or in a manual, but not all them are straight forward. A good test technician would know.
Yes, any good engineer/owner would test (or get tested) the relay functionality, preferably at the proposed settings.
The relay test set however does not test wiring external to the relay but that is not part of a relay test.
Rafiq Bulsara
http://www.srengineersct.com
RE: Commissioning test for Generator relay
For example, verifying time/magnitude inverse time curves.
RE: Commissioning test for Generator relay
It is more than a little upsetting to have a protective element that functions perfectly but is not properly programmed to have the element actually operate an output.
Sadly, the versatility of microprocessor-based and very flexible protective relaying has outpaced the competence of a lot of people who were quite competent in the application of the older protective devices.
old field guy
RE: Commissioning test for Generator relay
Kudos to 'oldfieldguy'. The electromechanical relays well applied will still protect you. It is far too easy to turn on every protective function in a multi-function relay thinking you are making a better protection scheme.
Unfortunately with relay testing, the relay test is only as good as the individual who comes up with the test plan.
RE: Commissioning test for Generator relay
Upon testing relay, take note, settings were referred to generator characteristics, results of load flow simulation and short circuit calculation without these results proper tripping coordination may not achieved especially when your system involves with import and export of power from power grids.
"..the more, the merrier" Genghis Khan