Medium Voltage General Purpose Distribution Transformers

Standard Features

  • Doe 10 CFR Part 431 Energy Efficiency
  • UL 506, UL 1561 Listed
  • Aluminum Windings
  • 60 Hz
  • Electrostatic Shield
  • Min. 60 dB Common Mode Noise Attenuation (Single Shield)
  • 150 C Temperature Rise
  • ANSI C57.12.01
  • Seismic Zone IV Compliant

Sound Levels

MGM general purpose dry type transformers are designed to meet NEMA ST-20 sound levels.

NEMA Standard Sound Levels

KVA dB Level
0-9 40
10-50 45
51-150 50
151-300 55
301-500 60

Three-Phase dry type transformers (20kV BIL, 30 kV BIL – 2.5 KV, 5KV Class)

KVA SIZE C deg RISE CASE DIM
H x W x D
CASE TYPE
30 150 38.5 x 28.5 x 20 GPB+
115 38.5 x 28.5 x 20 GPB+
80 38.5 x 28.5 x 20 GPB+
45/50 150 40.5 x 31.5 x 21.75 GPC
115 40.5 x 31.5 x 21.75 GPC
80 40.5 x 31.5 x 21.75 GPC
75 150 40.5 x 31.5 x 21.75 GPC+
115 40.5 x 31.5 x 21.75 GPC+
80 40.5 x 36.5 x 21.75 GPC+
112.5 150 40.5 x 36.5 x 21.75 GPC+
115 40.5 x 36.5 x 21.75 GPC+
80 51.5 x 40.5 x 26.5 GPD
150 150 51.5 x 40.5 x 26.5 GPD
115 51.5 x 40.5 x 26.5 GPD
80 51.5 x 40.5 x 26.5 GPD
225 150 51.5 x 40.5 x 26.5 GPD
115 51.5 x 40.5 x 26.5 GPE
80 66 x 50.5 x 32 GPE
300 150 66 x 50.5 x 32 GPE
115 66 x 50.5 x 32 GPE
80 66 x 50.5 x 32 GPE
500 150 66 x 50.5 x 32 GPE
115 66 x 50.5 x 32 GPF
80 80 x 64 x 44 GPF

NOTES:

  • Higher kV BIL, K-Factor or other special designs may require different case size.
  • Temperature-rise test maybe required if to use smaller case.
  • A general purpose (GP) unit that is bus ends goes into a substation case: consult MGM for case size.

STANDARD TAPS
2.5 & 5 Prl.V (all kva) – 2.5%, 2A2B

TYP IMPEDANCE (+/- ANSI TOL)
5kV, 30 BIL 4.5 ~ 5.5% or 5.25% +/- TOL

Common Options
  • Copper Windings
  • Outdoor NEMA-3R Kit
  • 80 & 115 C Temperature Rise
  • K-Factor: up to K-30
  • Wall Mount Brackets (15 – 115.5 KVA)
  • 50 Hz; 50/60 Hz
  • Totally Enclosed Non Ventilated (not UL listed)
  • Any Voltage Arrangement
  • Stainless Steel Case
  • Reduced Sound Level
Testing and Quality Assurance

As part of our quality assurance process, all MGM Dry Type Transformers go through a rigorous ANSI/IEEE test plan to ensure optimum preformance. These tests include

  • Winding resistance
  • Turn ratio test
  • Polarity and phase relation test
  • No load losses and exciting current test
  • Impedance and load loss test
  • Applied potential test

Bull Rush Program

 

Need it fast? We can deliver.  Emergencies happen and we can expedite the manufacturing of your units to meet your delivery requirements.  Ask about our Bull Rush program when you place your order and we can manufacture and ship your unit in as fast as 2 working days!

“Buy U.S.” Statutes

 

MGM Transformer Company can manufacture your units at our 120,000 square foot plant in the U.S. and source the raw materials solely from American companies if required. By doing so we can certify your units to be compliant with any of the various “Buy U.S.” statutes listed below (either state or federal). Please make sure to specify your requirements at the time of order.

 

  • Made in USA
  • ARRA (American Recovery and Reinvestment Act)
  • BAA (Buy American Act & Buy America Provisions)
  • TAA (Trade Agreements Act)
  • SPPA 73 P.S. 1881  (Steel Products Procurement Act)