Attch_7_VAFB_PADMOUNT_TRANSFORMER_SPECIFICATIONS.pdf
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- Attached to
- Replace Electrical Distribution Line, Feeder K5 Federal contract opportunity
- Solicitation number
- FA461019RA027
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Attch 07 VAFB Padmount Transformer
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Text version
FA461019RA027
Attachment 7
PADMOUNT TRANSFORMER SPECIFICATIONS
(Typical)
In Accordance With UFGS 33 70 02-00.10 and UFC 3-550-01
All stainless steel (Alloy 304) construction (includes tank, cabinet, base, radiators, fasteners, hinges, etc.)
“Pentahead” Cabinet Locking Mechanism/Device
Dead Front Construction (HV - 200A load break elbows with shield adapters)
Externally clamped LV bushings with threaded copper stud for full load current below 2,100 amperes - NEMA spades shall be provided per ANSI hole requirements
Radial Feed
KVA: As Required
Primary Voltage: 12kV Delta
Secondary Voltage: As Required
3- Phase Transformer
Frequency: 60Hz
Windings: Copper
Mineral Oil-Filled (Non-PCB): Type FR-3 Fluid
Standard Impedance
Mild steel high-voltage/low-voltage compartment barriers
Metal Oxide Varistor (MOV) surge arresters
Cooling Fins
Proper grounding provisions
Dial type gauges for oil temperature, liquid level, and pressure/vacuum
Bay-O-Net Fuses & Current-Limiting Fuses: Properly-sized - Additionally, the transformer will include 3 spare fuses
Two-Position “ON/OFF” Load Break Primary Switch
5-Position Tap Changer: (-5%, -2½%. 0, +2½%, +5%)
Automatic pressure relief device mounted in the terminal compartment
Oil drain valve with sampling device, and an oil fill/oil level plug
Nameplate and NEMA Safety Labels: Include a “UL Listed” symbol on ratings label and nameplate
Compliant with 2016 DOE Efficiency Standard
Four (4) lifting lugs
Entire exterior of the pad-mount transformer and terminal compartments shall be painted with a munsell green, outdoor finish
Guaranteed to have an average coil winding temperature of 65°C rise over an average ambient air temperature of 30°C when operated at rated voltage and load conditions
FA461019RA001
Attachment 7
Series of transformer tests (includes DGA) used to verify conformance to performance requirements as outlined in the latest revisions of ANSI C57.12.00 and ANSI C57.12.90. A report outlining successful test results must be completed and submitted to the Contracting Officer prior to final equipment acceptance
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