500 KVA Liquid Fill Pad Mount Transformer Type

Product: 500 KVA Liquid Fill Pad Mount Transformer Type, or Equal

MPD Naval Base San Diego is requesting a 500KVA fluid filled 12470-480/277 3Ph Pad mount Transformer 

^HITACHI 500 KVA Liquid Filled Padmounted Transformer Type. 

Padmounted 

HV 12470 Delta LV-480Y/277 3P 60HZ 

Description: 

Type CU/CU 

Padmounted Transformer Fluid Natural Ester Fluid 

Core Grain Oriented Steel Phase 3 Phase 

Frequency 60 Hz 

Average Winding Rise 65 °C Ambient Temperature 30 °C High Voltage 12470 Delta High Voltage Taps +2 -2 2.5%High Voltage BIL 95kV BIL Low Voltage 480Y/277 

Low Voltage BIL 30kV BIL Low Voltage Neutral XO bushing with ground strap 

Feed Configuration Loop feed Color Bell Green (Munsell 7GY 3.29/1.5) 

Customer Specification NONE Features (included in price): TANK & CABINET 

Dry Nitrogen Blanket 

304L Stainless Steel Transformer (Tank+Base+Cabinetry) 

6 parking stands 

Full Tank Weather cover Seismic rated transformer design with seismic anchors 

Penta-head cabinet handle bolt SST hardware 

GROUNDING 

2-hole ground pads (1 in HV and 1 in LV) 

BUSHINGS 

Threaded stud LV bushings x 4 Load break inserts 25 kV (dead front) x 6 

ANSI C57.12.34 Fig 9&11 HV 

bushing pattern (minimum) 

200-amp HV bushing wells x 6 

6-hole NEMA spade terminals x 4 Spade Supports 

ANSI C57.12.26 Fig 3&4a minimum stgrd LV bushing pattern ARRESTERS 

12 kV MCOV 10.20 elbow arrester - 25 kV interface x 3 

FUSES 

Oil retaining valve on bayonet x 3 

Scoop drip shield x 3 

Bayonet expulsion fuse no isolation link x 3 

Oil-immersed partial range current limiting fuse x 3 

Spare current limiting fuses x 3 SWITCHES 

4-position 200-amp T-blade make before break (closed transition) 

MONITORING 

Thermometer w 2 alarm contacts 1 NO & 1 NC each Qualitrol 

167-288-01 p/n 30C6637H01 Pressure Vac Gauge with Bleeder & Contacts 

Schrader valve 

Minco temperature sensor 

Liquid Level Gauge Qualitrol 

032-35E p/n 2810777H01 with one high and one low contact both are 

1 NO & 1.NC 

Large pressure relief device w 

INO & 1NC Contact 208-60F p/n 2B12401H01 

Pressure Relief Valve 

FITTINGS 

Drain valve and sampler MARKINGS 

Three (3) DANGER HIGH VOLTAGE Signs 

Non-PCB label 

UL Listed on Nameplate 

Stainless steel nameplate 

Fuse operation warning label 

"Non-PCB" on Nameplate 

Mr Ouch DANGER label internal OTHER 

9.5" x 17.5" Tank Handhole Cover 24" deep cabinet 

DOE Efficiency (2016) 

TESTS 

(1918DGA) DGA Before Shipment Six-hour leak test 

Contains less-flammable biodegradable natural ester fluid with no detectable level of PCB, less than 1PPM, at the time of manufacture.