Military Engineer Services Tender

(xxv) Suitable wheels (width distance should be as per Broad Gauge rails). (xxvi) Marshalling box. (xxvii) Indoor type Remote Tap Changer Panel (RTCC) with Automatic Voltage regulator and necessary indications. (b) On Load Tap Changer(OLTC), out door design weather proof, oil immersed, high speed, non inductive transition type employing, snap switches combining both selector and diverter duties housed in a self contained single compartment and mounting externally on transformer at suitable place. On load tap changer shall have following components "- (i) High torque electric motor suitable for 450V 3 phase 50 cycles AC supply including connected cabling. (ii) Motor drive and energy accumulator. (iii) Motor isolating device with over load protection. (iv) Raise, lower control for local operation.

(v) Local / remote control selector switch. (vi) Raise / low limit switch. (vii) Retainer switch. (viii) Stepping Relay. (ix) Anti - condensation heater with switch. (x) Inter locking between manual and electric operation. (xi) Main isolating switch with set of fuses. (xii) Insulated terminal board (with connector) for transformer tap leads. (xiii) Mechanical tap position indicator with handle. (xiv) Tap changing operation counter. (xv) Rating plate. (xvi) Driving mechanism chamber locking arrangement. (xvii) Un -drilled gland plate for cable entry. (xviii) Terminal strips. (xix) Drain cum filter valves. (xx) Suitable size of Neutral CT shall be provided.

NOTE :- (a) Transformer shall be inspected by inspecting officers nominated by Accepting Officer at manufacturers factory and all test pertaining to IS: 2026 shall be carried out predispatch complete all as directed. (b) Site testing :Insulation resistance ,oil temperature alarm trip, Winding temperature alarm and trip, Bucholtz relay alarm and trip, Low oil level alarm, testing of annunciation systems by auxiliary relay triping of transformer, Polarity marking and phase sequence, Ratio test, dielectric strength and filtration if required should be carried out. (c) Control cables/Bus -duct shall not measured and paid separately. (d) Addl/Altr required for foundation and civil works as per manufacture's recommendation is included in quoted rates. (e) If any work required to succecceful complition of work but not mentioned in BOQ will have to be done by bidder without any extra cost to the department.

(f) Necessary addn / altn required in existing earthing strip for connection to new power transformer included within the overall quoted rates. (g) Necessary arrangement for dismantling of existing 5 MVA Power transformer and shifting it to MES store Yard as directed by Engineer-in-charge is included within the overall quoted rates.