supply, installation testing & commissioning of surge protection devices (spds) :- 1) 110 volt acat feed end of dc track circuit in lightening prone area over bilaspur division. 2) spds with thermo dynamiccontrol technology. 3) manufactured spds certified from kema & ul. 4) detailed technical specificationattached at annexure a. 5) a circuit diagram of dc track circuit is enclosed herewith for the participating firms torefer & submit the same with spds connection in the circuit with the offer.
