Voltage Drop Calculation.xlsx

	A	B	C	D	E	K	L
1	Voltage Drop Calculation
2							Example 2
3	Voltage drop of cable
4	Voltage drop of cable					Vd	SQRT(3)IbL(RcosQ+X.SinQ))/(VN)100
5	The cable has its resistance and reactance causing some voltage drop. Motor takes 6 to 12 times the full load current during starting. The voltage drop criteria has to be checked in order to have sufficient voltage to develop load torque.
6
7							3.221284041
8	Number of Runs / Phase	:	1
9	Resistance of the conductor (95mm2)	:	0.247	ohm/km	(As per Cable catalogue)
10	Reactance of the conductor (95mm2)	:	0.0734	ohm/km	(As per Cable catalogue)
11	Voltage	:	415	V
12	Ib		163.67	A
13	L		0.12	Kmtr			Results
14	CosQ		0.85
15	SinQ		0.53
16	L	=	Length of cable (m)				2.0379413
17	R	=	Cable resistance at 90°C – Ohm/km
18	X	=	Cable reactance at 50 Hz
19	I	=	Rated current (A)
20	n	=	No. of Parallel runs
21	cos ø	=	Power factor
22	Ist	=	Starting current
23	cos øst	=	Power factor at starting
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