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A Westinghouse VCP-W 250 1200A 4.16KV breaker has a SC rating of 29kA and a C&L rating of 58kA. What does C&L refer to? Thanks for any assistance. Merry Christmas!!

Can someone explain the meaning of "Transformer Oil Power Factor". An analysis of our transformer oil indicated a sudden change in Power Factor that gradually began to recover. When we refer to PF, we refer to the relationship of real and reactive power. How does it equate with oil analysis...

Appreciate any input. At what point does lift oil solenoid 20QB-1 open and close? Thanks

I have to come up with a bunch of data for the System Operator. We've managed to pull most of the data together except for the "Line Charging Susceptance" of an underground cable. I'm not an Electrical Engineer so any help on how I can come up with this will be greatly appreciated. I've checked...

For the sake of argument, a section of bus is removed from service. Breakers are opened, disconnect switches are open and associated ground switches are closed. When restoring this bus, i feel ground switches should be opened followed by the closure of the disconnect switches.Is there a standard...

In a closed loop cooling system designed to run at 50% Glycol/50% Water, the concentration has dropped to 30% glycol. How will this affect heat transfer capabilities. The temperature range for this fluid is approx. 60 - 120 degF.

How does one calculate the Emergency Rating (MVA) of a power transformer?

Typically, can power flow both ways through a phase angle regulator?

What is base load? How does one determine the base load for a gas turbine?

Anyone know of a good source for generalized information on "Variable Frequency Transformers"?

Is it acceptable to use steam flow through a superheater to remove condensate that may accumulate in the S/H? Some feel that a bottled up boiler with a couple hundred pounds of pressure will quickly remove condensate when steam flow is established when the vent is opened during startup. I feel...

A fire in the load tunnel trips the unit.I believe the following should happen: CO2 will dump into space. A/C lube oil pump will trip. DC lube oil pump will come on providing sufficient oil to bearings for roll down. Question: Does the DC lube oil pump run continuously or does it cycle on and...

I understand all of the components of these control modes, but I can't seem to pull it all together in my mind. Suppose I am running a gas turbine facility with 5 GT's connected to a large grid. Also suppose an ncrease in load which causes a slight decrease in frequency. How will my 5 GT's, all...

Our site requires that we purge fuel lines (natural gas and butane) prior to any maintenance. We do this with N2 at the present time. We have a fairly good supply of CO2 on site. Is there a downside to purging fuel lines with CO2?

Assume a small amount of turbine oil found its way into a HP boiler. It may have entered the condensate system via the exhaust steam from a steam turbine to a surface condenser.How might this problem present itself if it made it to the HP drum ? Would foaming or priming be a possible result...

In the acronym kWh, Why is the W capitalized? Never really gave it much thought until someone asked about it. Thanks Blacklabs

We have an isolation transformer that steps down voltage (27kv to 2080v) to power an LCI. It's used to start a gas turbine. How is an Isolation transformer different? Thanks Blacklabs