We have a huge problem in our 300 MW generator. The generator seal oil ingress in a huge amount into the generator. so almost all the rotor winding and lower part of stator submerged in seal oil. we have drain all the oil through the hydrogen drain system.
Is anybody ever heard a situation like...
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we have fuel oil supply pump motor rated 90 kW to supply fuel to main boiler. this motor is supplied from grid, and unfortunately the grid is often faulted by lightning strike. after the fault happened, the voltage is decrease for a long time and recover again.But our motor have already...
Hi.
Is there any paper or study describe relationship between operation mode and failure rate of a power transformer. example if the transformer often energize on load (load side CB close) it will raise the probability of transformer fault due to higher inrush current if compare to energizing...
Is there any standard or best practices stated that we must first energize the upstream system then the downstream system.
example : for a transformer (150kV / 6 kV) feed a 6 kV Busbar. The busbar feed 3 Dry transformers (6kV/400V). We must first energize the 150kV Transformer, then busbar, and...
We Have two Station Service Transformer (SST) to supply our 6,3 kV Station Board A&B on a Coal fired Power Plant. The SST rating is 150 / 6,3 kV and primary side (150kV) supplied from the 150 kV transmission line through GIS (Gas Insulated Switchgear). There was a black out on the system so the...
Is there any Possibilities Restricted Earth Fault Protection of Transformer active because of unbalance load,Fault on the transmission line, or other cause besides ground fault on HV side?? I'm curious because recently two of our Station Service Transformer trip simmultaneously, and both are...
My Company wants to buy MCSA (Motor Current Signature Analysis) for our PdM (Predictive Maintenance)System. I'm really a beginner about this MCSA, I only know that it can detect any malfunction inside a motor like broken rotor, eccentricity air gap etc. Basic on your experience, what's the...
I work on a Coal fired power plant project now. We use 6 kV system for the large motor like ID Fan, FD Fan, etc. We use relay management system from China. this protection system only use 2 Current Transformer (CT)for the protection (phase a & c). none in phase b. do you think it has negative...
