Voltage Drop for 2400V system
Voltage Drop for 2400V system
(OP)
Dear All,
I am new to this forum and I have one question here. During our design for an airport ILS project, I find I need to calculate the voltage drop for a cable between the step-up and step-down transformer. It's about 3,170ft long and is the load is about 12amp at 2400V. My problem is that NEC Table 9 only provides cable information at 600V. How can I obtain cable info for 2400V?
Your help is highly appreciated and if there is anything wrong with my first post, just let me know.
James
I am new to this forum and I have one question here. During our design for an airport ILS project, I find I need to calculate the voltage drop for a cable between the step-up and step-down transformer. It's about 3,170ft long and is the load is about 12amp at 2400V. My problem is that NEC Table 9 only provides cable information at 600V. How can I obtain cable info for 2400V?
Your help is highly appreciated and if there is anything wrong with my first post, just let me know.
James






RE: Voltage Drop for 2400V system
RE: Voltage Drop for 2400V system
RE: Voltage Drop for 2400V system
RE: Voltage Drop for 2400V system
RE: Voltage Drop for 2400V system
Contact the cable manufacturer and obtain the data from them.
Either:
the approx. impedance / given distance (ohm/km, ohm/mile, etc.)
or
the voltage drop per amp metre (or feet)
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RE: Voltage Drop for 2400V system
Is this a series lighting circuit? Airfield systems are commonly series connected circuits, fed by a constant current transformer. In that case voltage drop may not be a significant to the design.
RE: Voltage Drop for 2400V system
per 1000 ft. An estimate of the voltage drop is
#2Cu .194 x 3.170 x 12 = 7.4 volts and for
#2al .319 x 3.174 x 12 = 12.1 volts.
RE: Voltage Drop for 2400V system
2.4 KV 2-1/2 miles.
YMMV depending on load.