as Trumpy says, read the link re CT's.
It is fine as long the CT's are shorted out across their secondary terminals. e.g. the terminals which used to go to the meter or testblock. ( already mentioned )
It is important that the new load does not exceed the maximum continuous rating of the CT's, in your case the CT has to be 400 Amps or bigger.
In case of multitap CT's the common or S1 tap and the >400 Amps tap may be used to short the CT out with.
It wouldn't do any harm to leave a warning note in the CT chamber DO NOT REMOVE JUMPERS !! for anyone else who sticks it's nose in the CT cabinet.
How hard was it actually to remove the CT's from the busbar or cable, this would have eliminated the whole problem, or were these CT's with a wound primary turn(s) ??
edited for typo's
[This message has been edited by RODALCO (edited 02-15-2006).]
