K9AE33000
h1
i
h1
i
h1
i
Ph1 Ph2 Ph3
N
h1
i
h1
i
h1
i
Ph1 Ph2 Ph3
N
h3
i
h3
i
h3
i
h3
i
h3
i
h3
i
h1
i
h1
i
h1
i
Ph1 Ph2 Ph3
N
h3
i
h3
i
h3
i
h3
i
h3
i
h3
i
h1
i
h1
i
h1
i
Ph1 Ph2 Ph3
N
h3
i
h3
i
h3
i
h3
i
h3
i
h3
i
DD210681
DD210680
DD210680
DD210683
3
Schneider Electric
Design guide
Design guide
Harmonic currents
Effects of harmonics on Canalis busbar
trunking
Fundamental frequency: ih1 (50 Hz)
No current in the neutral.
The conductors are correctly sized.
Fundamental frequency: ih1 (50 Hz) and 33% of
H3
Abnormal temperature rise in the conductors caused
by current at a higher frequency in the phases (skin
effect) and current in the neutral caused by summing
of the H3 harmonics.
Fundamental frequency:
ih1 (50 Hz) and
33% H3
Reduce the current
density in ALL conductors
by using appropriately
sized trunking.
Busbar-trunking selection
THD 15 % 15 % < THD 33 % THD > 33 % Busbar trunking Rating (A)
800
630
500
KTA
800
1000
800
630
KTA
1000
1200
1000
800
KTA
1250
1600
1250
1000
KTA
1600
2000
1600
1250
KTA
2000
2500
2000
1600
KTA
2500
3200
2500
2000
KTA
3200
4000
3200
2500
KTA
4000
Example. For a total rms current of 2356 A, (estimation based on power drawn by loads,
including harmonics), the operational current is
2500 A
.
THD is estimated at 30%. The appropriate trunking is KTA 3200 A.
For more information on harmonics
See the Cahier Technique publications on the Schneider Electric web site:
www.schneider-electric.com
Canalis KTA
The only effective solution
Summary :
K9AE33000 h1 i h1 i h1 i Ph1 Ph2 Ph3 N h1 i h1 i h1 i Ph1 Ph2 Ph3 N h3 i h3 i h3 i h3 i h3 i h3 i h1 i h1 i h1 i Ph1 Ph2 Ph3 N h3 i h3 i h3 i h3 i h3 i h3 i h1 i h1 i h1 i Ph1 Ph2 Ph3 N h3 i h3 i h3 i h3 i h3 i h3 i DD210681 DD210680 DD210680 DD210683 3 Schneider Electric Design guide Design guide Harmonic currents Effects of harmonics on Canalis busbar trunking Fundamental frequency: ih1 (50 Hz) No current in the neutral.
Tags :
current,2500,ph1,thd,1000,ph3,3200,800,trunking,ph2,frequency,2000,1600