Atch 1 SOW Pad Mount Transformers.pdf

STATEMENT OF WORK (SOW)

FOR PROCUREMENT OF

POWER TRANSFORMERS

27 SEPTEMBER 2024

1.0 BACKGROUND

This contract requires the contractor to purchase five medium voltage pad-mounted transformer for the replacement of equipment that is approaching end of life service located at Vandenberg Space Force Base (VSFB).

2.0 DECRIPTION OF WORK

The contractor shall furnish all labor, transportation and other requirements necessary for obtaining the equipment described in section 1.0. The pad-mounted transformers shall have the following voltage ratings and MUST provide spec sheets for each item:

• 112.5 KVA, 208Y/120, 12 kV

• 150 KVA, 480Y/277, 12 kV

• 300 KVA, 480Y/277, 12 kV

• 500 KVA, 480Y/277, 12.47 kV

• 750 KVA, 480Y/277, 12 kV

In addition, the transformers shall meet VSFB electrical requirements below:

• All stainless-steel construction (includes tank, cabinet, base, radiators, fasteners, hinges, etc.), stainless-steel grade shall be 304L or 316L (if available).

• “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 or Loop feed

• Loop feed must be reviewed and approved by the government.

• KVA Rating: As required.

• Primary Voltage: 12.0 kV Delta for Main and North Base and 12.470 kV for South base

• Secondary Voltage: As required.

• 3-Phase Transformer.

• Frequency: 60Hz.

• Windings: HV/LV copper

• Mineral Oil-filled (Non-PCB): Type FR-3 Fluid.

• Standard impedance.

• Mild steel high-voltage/low-voltage compartment barriers.

• 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 should be equipped with three spare fuses.

• Two-position “ON/OFF” load break primary switch

• 5-position tap changer: (-5%, -2 ½ %, 0, +2 ½ %, +5%)

• Automatic pressure relief device mounted on 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 components shall be painted with a

Munsell-Green, outdoor color-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.

• Provide DGA test to verify conformance to performance requirements as outlined in the latest revisions of ANSI C57.12.00 and ANSI C57.12.90.

2.1 Delivery Location

Contractor shall deliver the purchased equipment to the address below:

1172 Iceland Avenue

Building 11439 Electric Shop

Vandenberg Space Force, CA 93437

3.0. GOVERNMENT-FURNISHED PROPERTY AND SERVICES

No property or services shall be provided under this contract, except as noted below. All other items needed to fulfill the requirements of this contract are the sole responsibility of the Contractor.

3.4 Medical Response Services

The Government will provide initial medical treatment for life-threatening emergencies. It shall be the responsibility of the Contractor or Contractor employee to seek continued medical treatment, if needed. The Contractor or employee shall reimburse the Government for all Government-provided medical services. The emergency phone number is 606-3911 (LE Desk).

4.0 Main Base Access Requirements

Current security access restrictions at the Santa Maria Gate (Main Base entry gate) require all Contractor vehicles (that are the size of a standard bread delivery truck or larger) to enter only through the Lompoc Gate (located at intersection of Santa Lucia Road and Pine Canyon Road).

There is a vehicle check pull-off area at that gate and the Contractor may be required to submit to a vehicle search prior to gaining

Brand Name or Equal Salient Characteristics

SALIENT CHARACTERISTICS 0F REQUESTED TRANSFORMERS – Applies to all transformers.

ALL UNITS TO HAVE COPPER WINDINGS

STAINLESS STEEL TANKS

FR3 INSUALTION MADE IN THE USA

TAP CHANGER

ALL PADMOUNT UNIT TO HAVE COPPER WINDINGS

STAINLESS STEEL CONSTRUCTION

FR3 INSULATION MADE IN THE USA

DEAD FRONT LOOP FEED

TAP CHANGER, W/TAPS

BAYONET FUSING

LABOR SWITCHES

STANDARD GAUGES AND EQUIPMENT

MUST PROVIDE SPEC

PADMOUNT TRANSFORMERS

• Temperature Rise: 65-degree average winding rise

• Cooling Class: KNAN

• Frequency: 60 Hz

• Insulating Fluid: Envirotemp FR3

• Elevation: 3300 ft above sea level

• Sound Level: NEMA TR1 Standard

• Efficiency Standard: DOE 2016

• Harmonic "K" Factor: None

• kV Class: 15 kV

• High Voltage Configuration: Dead Front, Lopp Feed

• Taps: 2 - 2.5% taps above and 2 - 2.5% taps below normal

• Tap Changer: 100 Amp 5-position tap changer

• High Voltage Bushings: 200-amp Cooper bushing wells with removable studs

• Inserts: 15 kV, 95 kV BIL Copper load-break inserts

• Load-break Switching: 15-38 kV, 300A 2-Position

• Arresters: None

• Overcurrent Protection: Bayonet Fuses in series with Partial Range Current-Limit Fuses

• Expulsion fuses: Bayonet Fuses

• Bayonet Holder: Copper Bayonet Fuse Holder

• Spare Expulsion Fuses: Bayonet Fuses

• Low Voltage kV Class: 1.2 kV

• Low Voltage Bushings: 1" copper stud with 4-hole screw on spade bushings

• Cabinet: 20-inch-deep cabinet

• IEEE K-Dimension: Loop feed per IEEE C57.12.34-2015 Figure 11

• Coatings: Munsell Green topcoat

• Construction: 100% Stainless Steel

• Stainless Steel Type: 304L Stainless Steel

• Configuration: Standard Design

• Mounting Provisions: Hangar Brackets (One Set)

• Temperature Rise: 65

• Cooling Class: KNAN

• Insulating Fluid: Envirotemp FR3

• Frequency: 60 Hz

• Efficiency Standard: DOE 2016

• Taps: 2 - 2.5% taps above and 2 - 2.5% taps below normal

• Tap Changer: 100 amp 5-position tap changer

• Primary Bushings: 15kV Cover Mount

• Arrestors: None

• Overcurrent Protection: None

• Secondary Bushings: 5/8 Eyebolt with 3/8-16 stud Secondary Bushing

• Coatings: ANSI 70 Gray (Munsell 5BG7.0/0.4) topcoat