How to calculate HV Cable Sizing & what are the factors to
be considered for selection?.
Answers were Sorted based on User's Feedback
Answer / ashish tiwari
The HV cbale size shall be base on the fault level on HV
side. Like 18.4KA fault current for 11 KV supply & 21.34 KA
fault current for 33 KV supply. We can calculate the HV
cable
BY USING FORMULA ISH = K x A/( sq. root of T)
Where,
ISH :SHORT CIRCUIT CURRENT IN KA (r.m.s.)
T :DURATION OF SHORT CIRCUIT CURRENT IN SECONDS
A :AREA OF ALUMINIUM CONDUCTOR IN MM2
K :IS A CONSTANT = 0.094 for aluminium
ISH x Sq.rootT 18.4 x Sq. root 1
A = ------------ = ------------
K 0.094
= 195.7 sq.mm
HENCE 3 C x 240 SQ.MM XLPE (AL) CABLE IS REQUIRED FOR
INCOMING SIDE AS WELL AS OUTGOING SIDE OF 11 KV SUPPLY.
Is This Answer Correct ? | 32 Yes | 19 No |
Answer / ali
i want calcuiate the size of hv 6.6kv cable can trans 750 amper
with regard
Is This Answer Correct ? | 0 Yes | 0 No |
what is AVR in alternator how its work?
what is over cureent protection
which surface is suitable for NEUTRAL GROUNDING ?
Is it required to use Automatic transfer Switch in L&T panel board if we use AMF panel with DG set? How the single line diagram will be? Please forward the material to sreenu_207@yahoo.co.in
why autotransformers are not safe for supplying low voltage from a high voltage source?
in telecom we are using neutral?
Is motor current is dependent on load.
What will Happened if the polarity of CT is changed?
2.5mva transformer is installed in our company with oltc but it is not working in auto mode ,it is operative in manual mode control wiring is done how can i rectify it?
What loads the lagging and leading effects comes in a circuit?
Technical specification of a wind farm
why secondary terminal of current transformer should not be open circuited?