Supply, Installation, Testing and Commissioning of 750 KVA DG set and 2500 KVA 11/0.433 KV Distribution Transformer for utility-2 at IIM Indore.

as per relevant IS Code including first filling of filtered dehydrated oil, i/c supplying and grouting of suitable M.S. Channel with all accessories and transformer shall be confirming to IS : 2026 (Part 1 to Part 5), IS : 1180 and as per CPWD specifications complete in all respects etc as required at site. The maximum flux density in any part of the core and yoke at rated voltage and frequency shall be such that the flux density with + 12.5 percent combined voltage and frequency variation from rated voltage and frequency does not exceed 1.9 Tesla. The permissible temperature-rise shall not exceed 35 ºC for oil and 40 ºC up to 200 KVA and 40 ºC for oil and 45 ºC for above 200 KVA for winding. Inside of tank shall be painted with varnish or liquid resistant paint. For external surfaces one coat of thermo setting powder paint or one coat of epoxy primer followed by two coats of polyurethane base paint shall be used. IS: 1180 (Part 3) shall be referred to for paint thickness for normal to medium corrosive atmosphere. For highly polluted atmosphere and special application external paint work shall be as per direction of Engineer-in-Charge. Design ambient condition : a) air temperature 50 ºC, b) Relative

Humidity 90 % Max, c) Seismic Zone-III, d) Altitude as per location/site. Noise level Shall not exceed limits as per NEMA TR-1 with all accessories running measured as per IEC 551 / NEMA standard. The transformer should have QR code which should contain drawing, test report OEM manual, Geo- Tag of manufacturing location etc. Marking Each transformer shall be provided with rating plate made of anodized aluminium/ stainless steel material securely fixed on the outer body, easily accessible as per IS: 1180 Part3. The entries on the rating plate shall be indelibly marked. Fitting and Accessories : The following fittings shall be provided:- a) Two earthing terminals with the earthing symbol b) Oil level gauge indicating oil level at minimum, 30°C and maximum operating temperature; c) Air release device (for non-sealed type transformers) d) Rating and terminal marking plates; e) Silica gel breather f) Drain-cum-sampling valve (¾″ nominal size thread, IS 554) preferably steel with plug for three phase transformers;

g) Thermometer pocket with cap; h) Oil filling holes having (1¼″ nominal size thread) with cover (for sealed type transformers without conservator); i) Lifting lugs for the complete transformer as well as for core and winding assembly; j) Pressure relief device or explosion vent above 200 kVA; k) One filter valve on the upper side of the tank (for transformers above 200 kVA); l) Unidirectional flat rollers (for transformers above 200 kVA); m) Inspection hole (for transformers above 200 kVA); n) HV side neutral grounding strip (where one of the HV bushing terminal is connected to earth); o) Buchholz relay for transformers above 800 kVA. p) Arcing horns or suitable rating lightning arrestors for HT side – 3 Nos. q) Bird guard; r) Oil temperature indicator and winding temperature indicators for transformers above 200 kVA with suitable tripping mechanism above permissible limit s) Jacking pads (for transformer above 1 600 kVA);

t) Additional Neutral separately brought out on bushing for earthing. u) Magnetic oil level gauge (for transformer above 1600 kVA) with low oil level alarm contact; v) Non return valve (for conducting pressure test); w) Pressure relief device or explosion vent x). Monogram Plate y) Inspection cover z). Detachable type radiators with top and bottom shutoff valve. aa) Oil Conservator with Oil level indicator, minimum level marking and drain plug for all transformers of capacity 50 KVA and above. bb) Necessary hardware, clamps, lugs etc. for termination on HV/MV etc. for all transformers.

(d) Digital type Ammeter (0-4000 Amp), with selector switch and one set of 3 Nos. CT’s of ratio 4000/5A class I accuracy – 1 set (e) 3 Nos. Phase indication LED lamps with 2 Amp back up MCB, breaker ‘ON’, ‘OFF’, ‘trip’ indicating lights with required MCBs, test terminal block set, MCBs, circuits as per standard practice, auxiliary contacts for positive interlocking of the breakers as required. (f) Shunt trip, Under Voltage coil 220 V A.C. Note: The item includes provisioning of channels, plates, etc. in the existing MS cubicle in order to facilitate installation. It also includes fitting, Accessories & busbar rating compatible to existing busbar for connection between breaker and busbar.

(d) Digital type Ammeter (0-2000 Amp), with selector switch and one set of 3 Nos. CT’s of ratio 2000/5A class I accuracy – 1 set (e) 3 Nos. Phase indication LED lamps with 2 Amp back up MCB, breaker ‘ON’, ‘OFF’, ‘trip’ indicating lights with required MCBs, test terminal block set, MCBs, circuits as per standard practice, auxiliary contacts for positive interlocking of the breakers as required. (f) Shunt trip, Under Voltage coil 220 V A.C. Note: The item includes provisioning of channels, plates, etc. in the existing MS cubicle in order to facilitate installation. It also includes fitting, Accessories & busbar, rating compatible to existing busbar for connection between breaker and busbar.