Electric Vehicle (EV) Charging Transformers

EV duty transformer blue background

As electric vehicle (EV) infrastructure expands, transformers play an essential role in powering EV charging stations. HPS EV charging transformers are designed for Level 1, 2, and 3 charging installations, ensuring seamless power delivery, maximum efficiency, and unmatched reliability.

EV charging transformer at a charging station

With advanced dry-type transformer technology tailored to meet the unique demands of EV applications, HPS EV duty transformers are driving the charge toward a greener tomorrow by delivering unparalleled performance and empowering the future of sustainable transportation.

Designed to Resolve Common EV Charging Demands

Harmonic Load Management: Certain EV chargers can introduce high harmonic currents, leading to potential overheating in transformers. HPS K-rated EV Duty transformers effectively mitigate these harmonic challenges, ensuring reliable operation.

Environmental Durability: HPS EV Duty transformers are designed for both indoor and outdoor use, standing up to harsh conditions like rain, sleet, and snow. For areas with severe weather, we recommend a 3R rated enclosure for enhanced protection. In warmer climates, our low-temperature rise options help prevent overheating, ensuring steady performance.

Aesthetic Integration: To meet the aesthetic standards of modern charging infrastructure, HPS offers white enclosures as a standard product offering. Additional color options, including blue, red, green, and stainless steel, are available for seamless integration with other OEM equipment.

EV Charging power to conserve

Types of Electric Vehicle Chargers

Level 1 Level 2 Level 3
Typical Load Per Unit 1 to 2 kVA 3 to 8 kVA 200 to 500 kVA
Typical Feed Voltage 120 to 240 208, 240 to 480, 600 480, 600 or medium voltage
Typical Phase Per Charge Single phase Single or three phase Three phase
10 Year Warranty
  • 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.
  • Single phase from 15 kVA to 333 kVA, three phase from 15 kVA to 1000 kVA
  • 150°C temperature rise
  • 220°C insulation class
  • Options for low temperature rise to accommodate varying environmental conditions
  • Standard aluminum windings, with optional copper windings available for enhanced performance
  • UL and CSA listed
  • Standard Type 3R enclosures, optional 3RE enclosures for enhanced protection
  • Suitable for all Level 1-3 charging applications
  • Custom sizes, ratings and styles available upon request

Optional Features

  • RAL 9060 (White) with Zinc primer for aesthetic alignment.
  • Thermal Sensing Monitor for real-time temperature management.
  • Low Sound Level Options to reduce noise in sensitive environments

  • HPS EV Charging Transformers Part Numbering Structure

    Family 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
    S G 3 A 0 0 4 5 K B 0 K F C 0 E W

    Family

    S - Sentinel

    Type

    G - General
    K - 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 9030

    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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