Copperhead Conductor Systems - VAHLE

Catalogue Copperhead Conductor Systems

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SELECTION OF CONDUCTORS

' 19^2


	duty cycle	Zed
	100 %	1.00
	80 %	0.90
	60 %	0.78
	50 %	0.71
	40 %	0.63

Adequate Ampere Capacity must be provided

to carry the anticipated electrical loads:

The total Ampere load is determined from the nominal rated full load current reduced by the duty cycle (/_ED) and by a diversity factor for non-simultaneous operation.

The average crane motor duty cycle is usually between 40% and 60%, depending on the type of application.

A diversity factor of 0.4 to 0.7 can be used when there are more than one crane on the same runway.

Example:

3 industrial cranes, each I_n = 300 Amps. Length of runway: 100 m (330') Assumed duty cycle: 60% (Ed) Assumed diversity factor: 0.7

Other Criterion:

a) Select the conductor cross section to carry the calculated total Ampere load and consider the voltage drop calculation to maintain the limits established by the motor manufacturers. The conductor size and/or number of feed points should be increased in case the drop is exceeding the limitations. For very high Ampere loads it may be necessary to provide industrial booster cables.

b) Specify the correct VAHLE-conductor by considering the type of application and environment, such as heavy or light duty service, corrosion, heat, humidity, internal standards.

Ampere load per crane: I_n xf_ED : Ampere load for 3 cranes:

300 A x 0.78 = 234 A 234 A x 3 = 702 A

Total Ampere load when using

a diversity factor of 0.7: 702 A x 0.7 = 491.4 A

Selected conductors: F 35/100

or: F 45/50

Formula for Voltage Drop Calculation:

Effectice Length:

l = L power feed located at the end of the system l = L/2 power feed located at the mid-point of the system l = L/4 power feed located at both ends of the system l = L/6 power feed located at L/6 from each end of the system

•3 x I x l x Z

AC: DC:

= Voltage drop I = Ampere load

Z = Impedance

•u ^:

•u = 2 l x I x R

R = Resistance [Ohm/m]

l = Length from power feed to end of conductor [m]

[V] [A]

[Ohm/m]

L = System length

[m]

Engineering data


Conductor Type	Maximum Continuous Amps.	Resistance OhmA 600 m	Impedance* Ohrn/^ 000 m
L20/ 14	220	0.506	0.573
L20/ 25	256	0.386	0.458
L20/ 50	327	0.25"	0.336
L 20/100	444	0.M8	0.253
F 35/ 30	320	0.264	0.345
F 35/ 50	4-0	0.204	0.293
F 35/100	529	0.^30	0.238
F 35/150	632	0.096	0.2^4
F 35/200	724	0.076	0.203
F 45/ 50	495	0.^78	0.266
F 45/100	620	0."9-	0.223
F 45/150	728	0.089	0.203
F 45/200	826	0.072	0.^94
F 45/300	-000	0.05"	0.^82
F 45/400	••56	0.040	0.^74
F 45/500	-299	0.033	0.^69
F 45/600	•432	0.028	0.^65
A 20/ 14	445	0.^83	0.255
A 35/ 30	600	0.^0"	0.227
A 35/ 50	675	0.09"	0.220
A 35/100	795	0.072	0.207


Conductor Type	Maximum Continuous Amps.	Resistance OhmA 000 m	Impedance_*OhmA 000 m
A 45/ 50	790	0.07"	0.20"
A 45/100	9-5	0.060	0.^93
A 45/150	••025	0.05"	0.^88
A 45/200		0.045	0.^84
A 45/300	•295	0.036	0.^77
A 45/400	•45"	0.030	0.^72
AC 45/ 60	•000	0.053	0.^87
AC 45/110	•080	0.046	0.^84
AC 45/150	••60	0.042	0.^8"
AC 45/200	•225	0.038	0.^79
AC 45/300	••370	0.032	0.^74
K 45/ 60	220	0.300	0.364
K 45/110	380	0.^64	0.248
K 45/150	480	0.^20	0.2^7
K 45/200	575	0.090	0.^99
K 45/300	740	0.060	0.^82
C 20/200	720	0.088	0.227
C 35/400	••080	0.045	0.^97
C 45/500		0.036	0.^87
C 45/600	••365	0.03"	0.^69
C 45/800	••580	0.023	0.^68

Up to 4000 Amp. Special conductor rails are available.

* Impedance data based on • 50 mm spacing between phases and 50 Hz. Current ratings are based on a temperature rise of 30° C over 30° C ambient.