electrical commossioning

[himooo]

I am new electrical engineer and have no experience and I joined the commossioning team and I found that a lot of electrical tests must be understood so can any one help me and give me guide to all equipments tests
snd how to make it for available equipments ( contactors,breakers, relays, earth fault,CT,VT........etc)

 

[jdsmith]

Do a search for "megger" and you'll find plenty of information on insulation resistance testing. There have been a lot of posts on various types of ground resistance testing and testing of grounding/bonding as well. For contactors, breakers, relays do a search for "DLRO", "FOP" and "fall of potential". There have been a couple recent threads on breaker testing you might find just by looking through the last few pages of posts.

There is a lot of information here that you can find with the search function, and we are lucky to have a number of knowledgeable folks around here that are willing to share. If you have a specific question after doing the background reading I'm sure someone can help.

 

[nakulak]

your profile says gas plant. are these tests in place on live systems in hazardous environments, or are these commissioning tests prior to being put in operation ? What location are you in ? is this work for dot/doe or the client ?

 

[brian john]

Generally a commissioning firm has spec's and MOPS they follow in complete any commissioning. I would get a copy for NETA spec's. And your companies specs and/pr MOPS.

In commissioning you can be completing or reviewing test reports for , megger test, earth ground resistance test, high current test, coordination studies, resistive load bank test and this goes on...depending on what the end user/customer requested and what the design engineers require. Oh and if there is HV distribution involved the list grows.