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Collector Bus sizing Problem #181554
10/15/08 10:54 PM
10/15/08 10:54 PM
T
theseus  Offline OP
Member
Joined: Feb 2008
Posts: 12
china
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 11:52 AM
10/16/08 11:52 AM
M
mikesh  Offline
Member
Joined: Jun 2006
Posts: 613
Victoria, BC, Canada
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.

Re: Collector Bus sizing Problem [Re: mikesh] #181585
10/17/08 12:50 AM
10/17/08 12:50 AM
T
theseus  Offline OP
Member
Joined: Feb 2008
Posts: 12
china
Yes,Collector bus = paralleling bus.

But,generator is different from motor.

Re: Collector Bus sizing Problem [Re: theseus] #181620
10/20/08 12:46 PM
10/20/08 12:46 PM
M
mikesh  Offline
Member
Joined: Jun 2006
Posts: 613
Victoria, BC, Canada
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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