12-1132B1_18R0014_Attch_5_VAFB_Padmount_Xfrmr_Specs.pdf

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

FA461018R0014

Attachment 5

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

FA461018R0014

Attachment 5