Low versus High Voltage

[Rick_S]

I work in the IT industry.  I am working on a new building design.  The engineers have a meeting to discuss the various low voltage and high voltage systems for the new building.

What is the difference between low and high voltage systems and what building systems would fall under each category?

Thanks!

[toasted siopao]

I think nasa building code of the Philippines yan, may mga descriptions kung anu yan and kung sani-allocate sa raceway.

[rdpzycho]

kapag malalayo High Voltage para less current sa transmission. at same power Low Voltage = higher current, High Voltage = lower current.

same din 'to sa isang PC PSU, 12V ang papunta sa CPU and other parts, pero sa CPU, ngayon nasa 2V pababa na lang ang voltage. mas mababa kasi current na dadaan sa 12V, pero sa 2V nasa 100A 'yung ginagamit, kakapal wiring nung PC PSU kung ididirekta na 2V galing sa PSU.

[maldihtah13]

Usually nman siguro 220V eh low voltage na tapos yung 440V ung sinasabi nilang high. Mas malakas ang induction sa 440V kya dapat iwasan nyo dumaan malapit dito specially yung Copper ang data transmission line nyo. Kung Fiber nman wla problema sa interference.

[♪ ♫ ♫ ♪ ♪ ♪ ♫ ♫ ♫]

minsan sinasabi nilang Hi-side yong 13.2KV tapos medium voltage naman yong 440V at low voltage naman ang 220V.....

[rudy]

kapag residential or commercial buildings usually low voltage lang gamit.
ang medium to high voltage sa industrial plants.

Low voltage ginagamit kung mababa lang load (power).

[miGs]

I work in the IT industry.  I am working on a new building design.  The engineers have a meeting to discuss the various low voltage and high voltage systems for the new building.

What is the difference between low and high voltage systems and what building systems would fall under each category?

Thanks!

voltage level will depend on your requirement, and available voltage level in the premises. In industrial power systems, it is common to have at least two voltage level in the same building. In the Philippines, we have 230V (single-phase) for the utilization voltage. If you have relatively large motor loads, perhaps you will need 460V(3-phase) system to feed the 440V motors, ACU, blowers, etc.

Both 230V and 460V are still considered LOW VOLTAGE (up to 600V). Generally, voltages 1,000V and up are HIGH VOLTAGE. However, Medium voltage has been generally used to classify intermediate voltages, with reference to the "hundred-kilovolts" class.

So again, voltage level will depend on your load requirements, and the existing power system where you will inter-connect your new building (I am assuming the new building will be located within your company's premises). If it's not, you have to contact the local distribution company to inquire about their voltage allocations.

[robbietan]

I work in the IT industry.  I am working on a new building design.  The engineers have a meeting to discuss the various low voltage and high voltage systems for the new building.

What is the difference between low and high voltage systems and what building systems would fall under each category? Thanks!

low voltage systems (less than 600V) usually include telecoms, IT equipment, lights and fire alarm
high voltage systems (more than 600V) include large motor loads like HVAC systems
high

[EE-one]

anong specific system po ba ang pinaguusapan? usually gagamit ka lang naman ng 440V kapag may motor (e.g. elevator, a/c). pag normal naman na office building 220V lang naman kelangan.