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3750 kVA Three Phase Pad Mounted Distribution Transformer 12870V To 480Y/277V ANSI IEEE Standards
Detail Information
Place of Origin:
CHINA
Certification:
UL/cUL
Document:
UL&cUL certification-Three...er.pdf
Type:
Pad Mounted, Loop Feed
Rated Capacity:
3750 KVA
Primary Voltage:
12870V
Secondary Voltage:
480Y/277V
Vector Group::
Dyn1
Tap Changer:
Off-Circuit Tap Changer, 7 Steps
Dimensions:
114*90*83 Inch ( (L × W × H)
Efficiency Standard(s):
Meets DOE 2016 Standards, Meets CSA Standards Meets ANSI/IEEE Standards
Delivery Time:
30days
Supply Ability:
500set/month
Product Description

3750 kVA Three Phase Pad Mounted Distribution Transformer 12870V To 480Y/277V ANSI IEEE Standards



Product Overview


This 3750 kVA three-phase pad-mounted transformer is designed for North American medium-voltage distribution applications, including utility distribution, commercial complexes, industrial facilities, campus power systems, and outdoor projects requiring 12.87 kV to 480Y/277 V voltage conversion. Built in accordance with ANSI C57.12.34, it features 7-step high-voltage tap adjustment, 95 kV / 30 kV BIL insulation level, and integrated fuse, arrester, and loadbreak switch configuration. These specifications support project specification review, site voltage matching, insulation coordination, and outdoor equipment protection, while the integrated protection and switching layout helps simplify installation, field operation, and routine maintenance.


Product Photo


3750 kVA Three Phase Pad Mounted Distribution Transformer 12870V To 480Y/277V ANSI IEEE Standards 0


3750 kVA Three Phase Pad Mounted Distribution Transformer 12870V To 480Y/277V ANSI IEEE Standards 1


3750 kVA Three Phase Pad Mounted Distribution Transformer 12870V To 480Y/277V ANSI IEEE Standards 2



Main data


Type Pad mounted, Loop feed
Rated Capacity 3750 kVA
No. Of Phase 3
Primary Voltage 12470 V
Secondary Voltage 480Y/277 V
Cooling Method ONAN
Rated Frequency 60 Hz
Vector Group Dyn1
Insulation Class A (105℃)
Temperature Rise 65 K
Off-Load Loss 3700 W
On-Load Loss (85℃) 27300 W
Impedance 5.75~6.75 %
Winding Material Aluminum
Service Condition  Indoor Or Outdoor
Sea Level ≤1000 M
Dimension 114*90*83 inch
Total Weight 15540 LBS



Technical drawings


3750 kVA Three Phase Pad Mounted Distribution Transformer 12870V To 480Y/277V ANSI IEEE Standards 3


Standard Features

  • Pressure Relief Valve - Sight glass or magnetic gauge for visual oil volume verification
  • Oil Filling Valve - Inlet port for adding or replenishing dielectric oil during commissioning or maintenance
  • Oil Level Indicator - Sight glass or magnetic gauge for visual oil volume verification
  • Oil Drain Valve - Bottom-mounted valve for complete oil evacuation and sampling
  • HV Bushings - Insulated terminals that allow high-voltage conductors to pass through the tank wall safely
  • LV Bushings - Insulated terminals for low-voltage conductor egress through the tank wall
  • Bayonet Fuse - Protective device that interrupts circuit during overcurrent conditions
  • Grounding Pad - Connection point for safety earthing and protective grounding of the tank
  • Tap Changer - On-load or off-circuit voltage regulation device for turns ratio adjustment
  • Cooling Radiators - Heat exchanger fins that increase surface area for convective heat dissipation
  • Thermometer - Temperature measurement device for monitoring thermal conditions
  • Pressure Indicator - Gauge that displays internal tank pressure for monitoring gas accumulation and seal integrity
  • Lifting Lugs - Load-bearing attachment points for crane lifting and transportation
  • Nameplate - Data plate containing rated kVA, voltage class, impedance, and manufacturer info

3750 kVA Three Phase Pad Mounted Distribution Transformer 12870V To 480Y/277V ANSI IEEE Standards 4


Applications


Sector  Applications
Industrial Manufacturing plants, heavy machinery, assembly lines, warehouses, and industrial park distribution systems
Utility Distribution substations, medium-voltage distribution networks, grid support facilities, and renewable energy site distribution systems
Commercial  Large office buildings, hospitals, shopping centers, hotels, data centers, and other large commercial facilities
Infrastructure Airports, railway systems, water treatment plants, municipal projects, and public service facilities


Specification

Rated Power
(KVA)		 High Voltage
(KV)		 Low Voltage
(V)		 No-load Loss
(W)		 On-load Loss
(W)		 Height
(mm)		 Depth
(mm)		 Width
(mm)		 Weight
(kg)		 Weight
(Lbs)
75KVA 34.5KV
4.160KV
12.47KV
13.2KV
13.8KV
24940GrdY/14400
1247Grdy/7200
4160GrdY/2400
or others		 277V
347V
480V
600V
120/240V
208GrdY/120
415GrdY/240
480GrdY/277
600Y/347		 180 1250 1430 910 1930 645 1422
150KVA 280 2200 1530 980 1510 989 2180
300KVA 480 3650 1680 1080 1660 1415 3119
500KVA 680 5100 1790 1160 1810 1905 4200
750KVA 980 7500 2030 1300 2030 2755 6074
1000KVA 1150 10300 1854 1549 1651 3235 7132
1500KVA 1640 14500 2150 1570 2210 5835 12864
2000KVA 2160 20645 2220 1600 2380 6430 14175
2500KVA 2680 23786 2330 1650 3070 8865 19544
3000KVA 3300 30300 2460 1850 3260 11300 24912
3735KVA 4125 37875 2680 2060 4080 14400 31746


Production process


3750 kVA Three Phase Pad Mounted Distribution Transformer 12870V To 480Y/277V ANSI IEEE Standards 5

3750 kVA Three Phase Pad Mounted Distribution Transformer 12870V To 480Y/277V ANSI IEEE Standards 6

3750 kVA Three Phase Pad Mounted Distribution Transformer 12870V To 480Y/277V ANSI IEEE Standards 7


3750 kVA Three Phase Pad Mounted Distribution Transformer 12870V To 480Y/277V ANSI IEEE Standards 8