Frequency 60 Hz Impulse levels 150 kV (General), 200 kV (Windings) Vector Grounded wye/delta Cooling ONAN Tapping range ±5%, 2.5% steps, manual control finish Munsell Green Guaranteed losses Not used Temperature gauge Required Pressure level indicator Required Pressure relief device Required Required (to be located on the end of the drain valve inside Oil sampling the LV compartment) Filling orifice Required Tank ground tag Required Oil level indicator Required Solid (MV source, LV winding) Grounding Un-grounded delta (MV winding) Pad-mount transformers shall be fitted with in-line, medium-voltage rated, current-limiting fuse protection per phase utilizing suitably-rated, oil-immersed, current-limiting fuses. The selection of these fuses shall be such as to ensure: Compliance with the requirements of IEC 60787, or ANSI/IEEE equivalent. Short circuit protection of the MV transformer winding. That degradation of the fuses does not occur as a result of the flow of repeated transformer magnetizing in-rush currents. Ease of replacement following an in-service operation. Enclosure: The pad-mount transformer shall include a fully-enclosed, transformer mounted, MV and LV termination, steel cabinet, suitable for outdoor installation, as per ANSI C57.12.28. The cabinet must be so designed as to fully enclose all cable tails, cable terminations, grounding tags and transformer fittings within a tamper and rodent resistant, secure enclosure. The cabinet extend to floor level, fully shrouding all cable tails, having the facility for being directly bolted to the supporting concrete plinth. The cabinet depth shall be 24 inches.
Frequency 60 Hz Impulse levels 150 kV (General), 200 kV (Windings) Vector Grounded wye/delta Cooling ONAN Tapping range ±5%, 2.5% steps, manual control finish Munsell Green Guaranteed losses Not used Temperature gauge Required Pressure level indicator Required Pressure relief device Required Oil sampling Required (to be located on the end of the drain valve inside the LV compartment) Filling orifice Required Tank ground tag Required Oil level indicator Required Grounding Solid (MV source, LV winding) Un-grounded delta (MV winding) Pad-mount transformers shall be fitted with in-line, medium-voltage rated, current-limiting fuse protection per phase utilizing suitably-rated, oil-immersed, current-limiting fuses. The selection of these fuses shall be such as to ensure: Compliance with the requirements of IEC 60787, or ANSI/IEEE equivalent. Short circuit protection of the MV transformer winding. That degradation of the fuses does not occur as a result of the flow of repeated transformer magnetizing in-rush currents. Ease of replacement following an in-service operation. Enclosure: The pad-mount transformer shall include a fully-enclosed, transformer mounted, MV and LV termination, steel cabinet, suitable for outdoor installation, as per ANSI C57.12.28. The cabinet must be so designed as to fully enclose all cable tails, cable terminations, grounding tags and transformer fittings within a tamper and rodent resistant, secure enclosure. The cabinet extend to floor level, fully shrouding all cable tails, having the facility for being directly bolted to the supporting concrete plinth. The cabinet depth shall be 24 inches.
RFP_Appendix_A.3-Wind-Work_Specifications_PPA_or_BTA.docx