| 1 | Supplying, Installing, Connecting, Commissioning and Testing of Transformer, Step Down, Outdoor Type, 11 KV / 433 V [at No load], AC, 3 Phase, 50 Hz, of 160 KVA capacity, Double Copper Wound, Oil immersed, CRGO Core type Naturally cooled, Built-up with class "A" insulation, designed & constructed with particular reference to Tropical Condition, conforming to IS 1180 [Part-I], Level-3 with latest amendment complete all as specified and as directed and comprising of the following Specification and Fittings complete all as specified and directed:-
Continuous Rating : 100 KVA
No-Load Voltage Ratio : 11 KV / 433 V
Tapping on HV [%] : 7.5, 5, 2.5
Phase & Frequency : 3 Phase & 50 Hz
Connection : Delta Star
Vector Group : DYN 11
Cooling : ONAN
Type : Outdoor (Off circuit Tap changeover) | 1 | JOB |
| 2 | Fittings:
[a] Externally hand operated Off Circuit Tap Switch with position indicator and locking device.
[b] Conservator with Oil Gauge, filling hole with plug & drain hole with plug
[c] Undercarriage with four plain rollers
[d] Oil filling hole cum air release plug
[e] Drain Valve cum Sampling Valve
[f] Top Filter Valve with Plug
[g] Rating Plate with Diagram Plate
[h] Lifting lugs for Transformer
[j] Lifting lugs for Core
[k] Earthing Terminals
[l] Thermometer Pockets
[m] Silica Gel Breather
[n] Explosion Vent
[o] 100/150mm size Oil Temperature indicator, dial type with alarm and trip contacts
[p] 100/150mm size Winding Temperature indicator, dial type with alarm and trip contacts
[q] Off Circuit Tap Changer from +7.5 to -7.5 IN STEPS OF 2.5% | | |
| 3 | Terminal Arrangement:
[i] HV & LV side: Cable Box
[ii] Quad furcating cable box with five compression glands for PVC Cable and One additional neutral terminal shall be brought out separately for earthing purpose on LV Side.
[iii] First filling of new and unused Transformer Oil [IS 335 Marked], filtered and tested up to 60KV dielectric strength at 2.5mm air gap between testing electrodes. Certification of dielectric strength shall be submitted by the Contractor after filling the oil.
[iv] Apart from routine tests mentioned in these tender documents and relevant IS, pre-commissioning inspection of Transformer shall be carried out by Senior Electrical Inspector / Electrical Inspector.
[v] All necessary arrangements with devices for measuring the temperature of core winding and oil shall be done by contractor deemed to be included in the quoted rate
[vi] Platform for Transformer shall be constructed as per the manufacturer's instructions complete all as specified and as directed. The cost of platform is deemed to be included in the quoted rate.
[vii] The drawings of the transformer should be approved by the accepting officer before placing order.
[viii] The factory acceptance test to be done by the rep of Accepting officer prior to shipment of Transformer. | | |
| 4 | Supplying, Installing, Testing & Commissioning of 5 way RMU (1 incoming + 4 outgoing), 12KV, 630 Amps, outdoor, extensible type, SF6 Insulated, consisting of 01 Nos 630 Amps VCB, fixed, non draw out type with interlocking as incoming and 04 Nos 630 Amps VCB as outgoing complete all specified and as directed comprising of the following complete all as specified and directed:-
| 1 | JOB |
| 5 | [A] RMU shall be floor mounted, 12 KV, 630 Amps, 21 kA for 3 Seconds, SF6 Insulated, Motorized, Outdoor extensible type, RMU with Air Insulated Bus Connected Metering unit, Type tested in line with latest IEC Standards, suitable for operations at a height up to 1000m above sea level and Ambient Temperature range from 5 C to 50 C without any de-rating, Switchgear and Busbar shall all be contained in a Stainless Steel Enclosure [Minimum 2.0mm thick SS 304 Grade] filled with SF6 at 0.3 Bar [300 hPa] Relative Pressure, RMU Tank shall provide Full Insulation and Switchgear shall be insensitive to the environment with Degree of Protection of IP67, Switchgear Operating Mechanism shall have an IP2X Protection and Cable Chamber shall have IP3X Protection, Outer Enclosure shall be IP 54 type tested, Powder Coated with Pure Polyester Based Paint, suitable for the site installation conditions, Accidental Overpressure due to an Internal Arc is limited by the opening of the safety valve, at the bottom of the metal enclosure, away from the operator, Plug in type of extensibility must be provided and coupling busbar should not be exposed to air to avoid oxidation of busbars. Extension of cubicle shall require 450mm to handle and the gap between the coupled RMU s must be within 10mm. | | |
