Electric Vehicle (EV) Charging Transformers

Coming Soon

EV duty transformer blue background

As electric vehicle (EV) infrastructure expands, transformers play a critical role in powering EV charging stations with reliable, efficient energy. HPS EV charging transformers are specifically designed to manage the high and fluctuating loads of EV charging, delivering consistent performance in demanding conditions.

HPS transformer in EV installation in all weathers

With advanced dry-type transformer technology and an optional robust 3RE+ enclosure that provides superior protection over standard ventilated designs, HPS EV charging transformers offer durability, energy efficiency, and dependable operation for high-volume and fast-charging applications.

Solving Real-World EV Charging Challenges

Harmonic Load Management

Certain DC fast chargers can introduce high harmonic currents, leading to potential overheating in transformers. HPS offers K-factor and harmonic mitigating transformers to help manage these harmonic loads.

Environmental Durability

Some installations require an enclosure rating higher than Type 3R for outdoor installations. In these cases, or when extra protection against heavy, blowing rain and snow is needed, we recommend the HPS 3RE+ enclosure. In warmer climates, low-temperature rise options reduce the risk of overheating and support consistent performance. 

Color Integration

HPS offers a range of enclosure color options to match the look of modern EV charging stations.

The Most Rugged Outdoor Enclosure that meets Energy Efficiency Standards

Our optional 3RE+ enclosure is designed, tested, and built for real-world conditions.

Features of a 3RE plus enclosure

The HPS 3RE+ enclosure* is a rugged, UL-certified outdoor solution designed to protect transformers in harsh, real-world environments. Built to perform in severe weather, the 3RE+ delivers dependable protection without added complexity.

  • Louvers with filters block dust and debris and limits access to the transformer for improved safety, especially in public areas.
  • Filters at entry points protect the transformer from blowing rain and snow.
  • Bottom filters protect from ground moisture and debris.

*The HPS 3RE+ enclosure is available for transformers 75kVA and above. While the enclosure is designed to withstand severe weather conditions, we recommend consulting with our experts to ensure proper protection for your specific needs.

10 Year Warranty
  • Suitable for all Level 1-3 charging applications
  • Meet or exceed U.S. Department of Energy (DOE 2016) 10 CFR Part 431 efficiency standards and comply with the latest Canadian Energy Efficiency Regulations (SOR/2018-201) as of NRCan 2019.
  • Three phase from 15 kVA to 1000 kVA
  • 150°C temperature rise
  • 220°C insulation class
  • Standard aluminum windings
  • Standard Type 3R enclosures
  • UL listed (E112313)
  • CSA Certified (LR3902)
  • Meet NEMA ST-20 sound level standards

Optional Features

  • Type 3RE+ enclosure for harsh environments
  • Copper windings available for enhanced performance
  • Low temperature rise options available to accommodate varying environmental conditions
  • Custom colors available to match the look of your installation
  • Thermal sensor for real-time temperature management available
  • Low sound level options to reduce noise in sensitive environments
  • Custom sizes, ratings and styles available upon request

  • HPS EV Charging Transformers Part Numbering Structure

    Type Generation Phase kVA Pri. Volt. Sec. Volt. K Rating Winding Material/ Electrostatic Shield/ Thermostat Temp. Rise & Insul. Class Enclosure Sound Level Special Duty Enclosure Color
    SG 3 A 0 0 4 5 K B 0 K F C 0 E W

    Type

    SG - General
    SK - K Rated

    Generation

    2 - Gen. 2, DOE 2016
    3 - Gen. 3, DOE 2016

    Phase (Pri-Sec)1

    A - 3PH Delta-Wye-N
    B - 3PH Wye-N-Delta
    C - 3PH Delta-Delta/CT2
    D - 3PH Delta-Delta
    Y - 3PH Wye-N Wye-N
    K - 1PH Single-Single

    kVA

    kVA Rating

    Primary Voltage3

    1PH:
    B - 208
    D - 240
    K - 480
    N - 575
    P - 600

    3PH:
    208D, 208Y/120
    240D
    480D, 480Y/277
    575D
    600D, 600Y/347, 220D, 220Y/127

    Secondary Voltage

    1PH:
    B - 208
    E - 240
    L - 240 x 480
    M - 240 x 480
    P - 600
    Y - 347

    3PH:
    208D, 208Y/120
    240D, 240D/120CT
    480D, 480Y/277

    600D, 600Y/347
    380Y/220V, 400Y/231V,
    416Y/240V, 430Y/248V

    K Rating

    0 = None (K1)*
    4 = K4
    9 = K9
    3 = K13
    2 = K20 (max. 300 kVA)

    Winding Material/Electrostatic Shield/Thermostat

    A - Aluminum*
    S - AL + Shield
    C - Copper
    K - CU + Shield
    L - CU + Thermostat
    M - CU + Shield + Thermostat
    J - CU + Double Shield

    Temperature Rise at Standard 200°C Insulation Class

    B - 80°C
    F - 115°C
    G - 130°C
    H - 150°C*

    Enclosure

    C - Type 3R*
    D - Type 3RE
    E - Type 3RX
    X - None (Core & Coil)

    Sound Level

    0 = Standard*
    3 = -3 dB
    5 = -5 dB
    8 = -8 dB5

    Special Duty

    E - EV Charging

    Enclosure Color6

    None -
    W - White RAL 9003

    1Standard configurations winding vector per UL 1560
    2Available standard only with 240D/120CT secondaries
    3Units with primary volatge codes 'G' and 'X' come standard as 50/60 Hz rated. All others are 60 Hz only.
    4NEMA 4, 12 and 4X available
    58dB is available only for 75kVA and above
    6Character only applies to EV duty transformer
    *Comes as default

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