Dear colleagues, I hope someone can explain following statement in IEC 61439-1 10.10.3.1 General:
<Quote>
In absence of test at 60 Hz for currents above 800 A, the rated current at 60 Hz shall be reduced to 95% of that at 50 Hz.
<Unquote>
The Switchboards for Temperature Rise Test are rated for...
Dear colleagues, I hope someone can explain following statement in IEC 61439-1 10.10.3.1 General:
<Quote>
In absence of test at 60 Hz for currents above 800 A, the rated current at 60 Hz shall be reduced to 95% of that at 50 Hz.
<Unquote>
The Switchboards for Temperature Rise Test are rated for...
Currently in our ship project has VFD (Variable Frequency Drive) been used to start and ramp up 3.1kV/60Hz/2-pole/5400kW electric motor for Compander.
Ship power network have 4 pcs 6,6kV/3800kW/60Hz Diesel Generators whereof 3 is running when motor is started. Sufficient capacity to start the...
Dear colleagues,
In the ship specification is stated that in case the capacitive fault current exceed 5A, the neutral to be provided with resistor (resistor earthed system).
I have been looking suitable ways for calculation, but there seems to be many different ways (?) to calculate capacitive...
