Search results for query: *

Hello in underground connections you need a cable guard (conduteur earth) or not? Why

I need to have 30 MW for each duct and `i` must be equales to 584 to have p = 30MW ! how can I increase the power to 30 MW for each duct with reasonable divergence that not exceed 50 cm between ducts?

i can keep 500mm distance between conduits

same methode for calculus I ? I=Sqrt{ΔӨ-WD*(0,5*T1+T2+n(T3+T4)/(R(T1+(1+λ1)*T2+n(1+λ1+λ2)*(T3+T4))}

The three phases happen in the same duct (1 duct contains 3 cables== 1 circuit). Circuits are buried together in the power station then they are separated to be diffused in their designated post. The north post is connected to 3 circuits. So if one circuit contains 495 Then the three same...

here is my power circuit the specifications mention that 30MW should be carryed to the North post(poste nord) but 303A isn't enough

cable Characteristics

cable of 30 kV 630 mm2 aluminium conductor XLPE for ROC=ROE T'''4=1 / 2 / pi() * ROE * Ln((UE + Sqrt(UE ^ 2 - 1)) * fk) / 100 ROE= 1,5 C.M/W UE = 2 * LS(i) / DDEXT LS(i)= 1800 mm DDEXT= 200 mm ==> UE =18 FK=3147,04138 (with 450 mm between ducts ) T"'4=0,02662067104 T'4=0,24118306...

In my situation I don't have concrete. Ducts are similar and puted in earth directly. Can I use this procedure even if I don't have concrete? If not what can I do? Thank You.

the system must be balanced so I use the IEC 60287 2-1 ? I'm blocked on calculates External thermal resistance T4''' (about the method Neher-McGrath is for cables embedded in the concrete?,or I can use for my situation?)

for calculate the current condition for laying cables: Synthetic insulated single core cables for rated voltages Uo / U = 18/30 kV (Um = 36 kV)

CROSS-BONDING in middle voltage distribution grids I need courses and information on subject I will be very thankful If you can guide me and help me. Thanks in advance. Ennajjar Mehdi

I'm studying Electrical engineering at faculty.I will be pleased If you can guide me and give me advices and directions to take for resolving some problems I meet during my internship. Actually, I'm working on a project about a medium voltage electricity distribution (HTA) through underground...