What are the benefits or disadvantages between Inwardly turning and outwardly turning props on twin shaftline ships?
What direction do props turn on four shafted ships?
Thanks
Hopefully a very simple question!
How do you calculate shaft torque from air-gap torque under transient conditions?
If my load inertia is J1 and my motor inertia is J2, is it as simple as Shaft Torque = J1/(J1+J2)*air-gap torque?
Thanks
I am curious to know the following, if I had two synchronous generators, both rated equally for kVA and voltage, if they had different sub-transient reactance, say one at 10%, the other at 20%, how would they physically differ in internal configuration/construction or size? Secondly, how does a...
We are commissioning a 25MVA, 4160V brushless 2-pole alternator driven by a gas turbine at 60Hz (3600rpm). Today at with the gas turbine at synchronous speed and alternator off the bars the excitation was powered up for the first time. The AVR/excitor commissioning team set the manual...
Hello Forum,
I am interested to understand what effect the variation in electrical parameters of a generator has on its construction, size and relative cost.
For example, if I have to select a generator with a high sub-transient reactance, how different in size is this machine compared to one...
I am designing packaged electrical equipment for use in marine offshore or vessel applications and my client has asked me how much volume of space he should allow behind or on top of the equipment for the vented arc gases that could be released in the unlikely event of an electrical short...
I am trying to understand the short circuit mechanism of dry type transformers.
How many short circuits on the secondary should a well manufactured dry type transformer withstand in its lifetime?
What mitigating strategies do transformer manufacturers take to withstand the forces induced?
If...
