A
We are often experiencing bad temperature values (less temperature comparing actual) on generator stator and Gen-bearings (GEN cap: 120MW 11KV measuring device: Mark-V). Most of the time problem was solved by cleaning (spring Contact cleaner) and re-tightening the terminals at marshaling panel. Please note that All of these RTDs (PT100 three wire) are having one of their compensation wire grounded at field JB which is not foreseen in general installation. some one have idea on following
1. Purpose of grounding the RTDs compensation wire in field.
2. Can it contribute to the problem stated above?
3. Any Suggestion recommendation to overcome on this problem.
(Note:
a. Marshaling panel same type of terminals are in use for other instrumentation signal without any problem.
b. No any loose wire found during troubleshooting.
c. RTDs shield wires are connected to ground in marshaling panel.
1. Purpose of grounding the RTDs compensation wire in field.
2. Can it contribute to the problem stated above?
3. Any Suggestion recommendation to overcome on this problem.
(Note:
a. Marshaling panel same type of terminals are in use for other instrumentation signal without any problem.
b. No any loose wire found during troubleshooting.
c. RTDs shield wires are connected to ground in marshaling panel.