The bolt in question passes through the buss bars and simply attaches the two exterior body sections together. The voltage on the bus is 480v and both buses had been megger tested and in service for 12 and 18 months, before their respective failures. We still can't get a satisfactory response...
The rust is from the bus setting outside after the failure occurred. The failure with the rust is from an outside installation but the other on was installed just inside the building in a MCC Rm.. We did consider it being an installation issue but I find it difficult to believe two different...
Hi All;
Here are the pics of the two failures, the faults appear very similar in location. Please let me know what you think.http://files.engineering.com/getfile.aspx?folder=e77308e7-16d9-43f1-a1a6-39ca91bae2f1&file=Bus_Duct_Failure_Pics_009.JPG
Hi Desertfox;
The bolt I am referring to is the factory installed bolt nearest the end of the bus section. I will include another pic. Thankshttp://files.engineering.com/getfile.aspx?folder=bb56f063-31e1-4d93-892e-9e79783346b0&file=NEJ_Buss_Duct_077a.jpg
Hi All; Thanks for the response;
Zogzog: The two buses which failed, were installed in the same manner by two different contractors. The PF maintenance is IR scans at the joints.
Rcwilson: The buses which failed were both installed in a horizontal manner and the support is just out of the pic...
Hi All,
Has anyone had any issues with 4000 amp (Spectra) bus Duct failures? The plant I am working at has had two failures in the past year. One failure occurred just outside the mcc rm., and the other occurred just inside the mcc rm. wall. The faults seem to have occurred in the same general...
