Commissioning Procedures
Commissioning Procedures
(OP)
Actually i'm newly envolved in a new project and i will be one of the Electrical Engineers that i'll participate in the pre-Commissioning & Commisioning Phase
AnyHow,I've some questions for all of u Engineers that could help me in this new step in my life
1- do i need to test low Voltage Circuit breakers or i've just to accept the certificate of the vendor attached with each breaker
and if i don't could u plz tell me the right test procedures ( i beleive that i'll need a primary current injector didn't i ? )
2- Enclosures of the Hazard Area Classification how can i test them or do i only accept the vendor certificates as they all will categrized as class 1 Div 2.
3- i'm sure that i've to test all the protection devise but i just want to ensure my procedures ?
All of u Engineers any one will answer me with a helpfull answers will really deserve a big star..................
Plz advice.
Regards,
AnyHow,I've some questions for all of u Engineers that could help me in this new step in my life
1- do i need to test low Voltage Circuit breakers or i've just to accept the certificate of the vendor attached with each breaker
and if i don't could u plz tell me the right test procedures ( i beleive that i'll need a primary current injector didn't i ? )
2- Enclosures of the Hazard Area Classification how can i test them or do i only accept the vendor certificates as they all will categrized as class 1 Div 2.
3- i'm sure that i've to test all the protection devise but i just want to ensure my procedures ?
All of u Engineers any one will answer me with a helpfull answers will really deserve a big star..................
Plz advice.
Regards,






RE: Commissioning Procedures
Commissioning and testing are two different things. This is a common point of confusion. The purpose of commissioning is to make a facility work as the owner intends. It can involve design review, installation verification, component and system testing, functional testing, documentation and training.
In general, low voltage circuit breakers should be tested in the field. I don't know of tests for hazardous location enclosures. One common source of testing specifications is the International Electrical Testing Association. http://www.networld.org
RE: Commissioning Procedures
As far as low voltage breaker testing. Fist of all make sure that they are not in service. Then you need to rack the breakers out completley to get them out of the shelfing. Once the breaker is out of its enclosure you need to crank it back into the racked in posistion (while the breager is drawn out of its casing). If there are arc chutes I recomend taking them off and cleaning them, you should scotch bright the contacts and also regrease the fingers out back that make up with the bussing. After the contacts are cleaned, I would ductor them. If the readings are good, put the arch chutes back on and then perform a megger test. ( CB open, across the contact. Closed phase to phase and phase to ground)
Usually low voltage breakers have test sets sold for that breaker. Some kind of ssecondary injection is usually performed to test the trip units. I would consult the manuals.
I hope some of this helps.
RE: Commissioning Procedures