ats switches in //
ats switches in //
(OP)
hello Gentlemen,
a company is suggesting to use 2x400a ats switches in // instead of a 800a...
as far as i remember , this is not a good idea , either in terms of repartition of current , and in term of switching timing.
do you have any idea about that ? any help welcome.
ps : this is for the emergency generators of an hospital in Haiti o_O
best regards
Jean Mi
a company is suggesting to use 2x400a ats switches in // instead of a 800a...
as far as i remember , this is not a good idea , either in terms of repartition of current , and in term of switching timing.
do you have any idea about that ? any help welcome.
ps : this is for the emergency generators of an hospital in Haiti o_O
best regards
Jean Mi






RE: ats switches in //
RE: ats switches in //
best regards
jean mi
RE: ats switches in //
here is the reply from the manufacturer of the equipment , and by the way , the max current is 1600 amps :
"Hello Jean,
From your attached drawings, there are two concerns.
1. The switches' transfer speed are slightly different. When the ATS transfers from one side to another at full load, the switch that transfer faster than the other will receive a large load current exceeding the rated operating current of the switch in micro-seconds. It could cause an unexpected trip or failure.
2. All of the switches' main contact has a micro-Ohms resistance when it closed. It will cause the load sharing unbalance between two 800Amps switches. For example, with a 1600Amp load, one of the switch provide 700Amps and the other one needs to provide 900Amps. It will cause an
unexpected trip or failure.
Therefore we don't suggest to use two 800A transfer switches to provide to a 1600Amps load. "
thanks for the support :)
Jean Michel
RE: ats switches in //
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: ats switches in //
RE: ats switches in //
well , with the forum members support , i have now a strategy to correct those issues , many thanks.
best regards
Jean Michel