I am wondering it someone makes a Synchroscope that can be connected to the high and low sides of a Unit Connected Generator. Unit Connected =(Generator is hard wired to the Low-voltage side of the GSU with the Generator Breaker on the High-side of the GSU). The owner would like a Synchroscope...
I have a customer that has a Selectron PMC 22 see attached picture. I had seen an previous post that indicated there are some people in Eng-Tips that have experience with this unit. The green Run LED is blinking and indicates a problem and that the PLC is not running. I know about many other...
I was wondering if there were any old guys out there that had heard of or remembers when Baldor sold a DC drive that was actually manufacturered by Eurotherm/SSD. Apparently it was done in the 2000 to 2003 and it ultimatley was discontinued. Baldor arranged with Eurotherm/SSD to create a...
The local Utility has decided we need to change the highside voltage on our 1000KVA service transformer from 12.0kV to 13.2kV. The configuration is Highside Y to Lowside Y with the low side being 480V. I was wondering if anyone has had experience in this area?
I have a 45MW 13.8Kv 60HZ Generator with a Brushless Excitation system on it. The Generator is a 3600 rpm two pole machine. There is a PMG (Permanent Magnet Generator) mounted on the end of the Brushless Exciter that puts out 292Vac at 240HZ to a Brush Prismic A30 Automatic Voltage Regulator...
We have a 1970 Vintage GE Steam Turbine 13.8kV, 35MW Hydrogen Cooled unit. During an inspection we discovered that most of the epoxy had leaked or melted or something out of the Bushing containment cone. I am wondering whether anyone out there has seen this before. I have worked for GE in my...
We have a 30 year old GE 20MW 13.8kV generator runinng at 10MW with a Power Factor or 1.0. The field is rated at 250VDC at 199Adc maximum. The excitation is provided by a Basler Static Full wave unit. We run at approximately 90Vdc at 100Adc most of the time. We consistently have arcing on the...
Normally in a Brushless excitation system we have a PMG (Permanent Magnet Generator). Because it is a independent source of power it will provide the Voltage Regulator system all the power it needs to control the generator voltage. However if there is no PMG and you must use a self excited...
I am working on a new wind farm project. The first string of fifteen 1.5MW wind turbines are coming online and I have a question about capacitance in the 34.5Kv distribution system. We have fifteen 1750KVA padmount transformers, one for each Wind Turbine. The transformers are all connected...
We have an older GE Generator (70MW) that is being put back into service. The collector rings have some rust on them but it can be clean off easily. My question is at what point should we consider replacing the collector rings. It is very expensive and I would like to know what the criteria...
There is an Industrial Plant with a Gas Turbine Power Plant connected to the same 138Kv substation. The Utility connects via a 15 mile 138Kv transmission line to the existing substations where there are three 70MVA delta connected transformers. Two of the transformers feed the industrial...
I have an application that currently uses a 480Vac, 400A shunt trip circuit breaker (CB). The load is a 225KVA SCT (saturable current transformer)resistor heating system for annealing metal parts. The problem is that after each cycle they trip the 400A CB to shut off the heating power. After a...
