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New tool
by SMOKEYBOB - 02/15/21 04:59 PM
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 Collector Bus sizing Problem
#181554
10/15/08 09:54 PM
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Joined: Feb 2008
Posts: 12
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How to size the Collector Bus?
I have 3 1600kw/400V gengerators Synchronized and connected to the Collector Bus.
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Re: Collector Bus sizing Problem
[Re: theseus]
#181567
10/16/08 10:52 AM
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Joined: Jun 2006
Posts: 613
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Ok I'll bite, (1600 X 125%) + 1600 + 1600 = 5200 amps.
28-108 of the Canadian Electrical code for conductor sizing for Motors.
Method 2 take the connected load at 125% and size the bus for that.
I don't know what a collector bus is but i guessed it is the bus after the transfer switches where each generator parallels.
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Re: Collector Bus sizing Problem
[Re: mikesh]
#181585
10/16/08 11:50 PM
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Joined: Feb 2008
Posts: 12
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Yes,Collector bus = paralleling bus.
But,generator is different from motor.
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Re: Collector Bus sizing Problem
[Re: theseus]
#181620
10/20/08 11:46 AM
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Joined: Jun 2006
Posts: 613
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Yes a generator and a motor are not the same but the wires are sized the same. At least that is what i derive from section 28 of the CEC %125 of the first (largest) generator and 100% of the next 2. Generators and motors are very similar in terms of what happens inside them whether making or using electricity. Cooling, winding and loading all apply the same. A stator for a motor and a generator look the same from a winders perspective at least from 28 year old memories they do. I have rewound stators for both. The armatures are different as there is excitation and magnetic fields to build.
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