Inquiry Product Image
Leave A Message
If you are interested in our products and want to know more details,please leave a message here,we will reply you as soon as we can.
What Are You Looking For?
High frequency C core filter Dry Type Transformer SCB13 Isolation Toroidal Transformer Power Frequency Toroidal Transformer
Consultation
Application Solutions

Transformer Solutions for EV Charging Infrastructure

EV Charging Station Matching

 

Industry Challenges

The rapid global buildout of EV charging infrastructure — from 7kW residential wall-boxes to 360kW ultra-fast highway corridor chargers — creates intense demand for specialized distribution transformers that address a unique set of challenges:

  • Extreme peak-to-average load ratio: A charging station may draw 500kW for 15-minute peak sessions then idle at near-zero load for hours.
  • Harmonic current injection: Rectifier front-ends of DC fast chargers can cause THDᵢ to reach 30–45% without mitigation, causing additional winding losses and premature thermal aging.
  • Constrained real estate: Urban charging hubs require compact, low-noise distribution transformers that can be sited near residential and commercial buildings without complaints.
  • Grid interconnection compliance: Utilities increasingly mandate that charging station transformers meet IEEE 519 harmonic limits and provide reactive power support capability.

The Pain Point:

Standard distribution transformers quickly degrade under the severe harmonic distortion and extreme peak-to-idle load cycles characteristic of modern EV charging networks, leading to premature failure and grid non-compliance.

EV Charging Station Power Distribution

Our Transformer Solution

We provide purpose-built transformers and integrated substations engineered to handle heavy harmonic currents, high idle times, and space limitations in EV charging infrastructure.

SCB13-EV Series (Harmonic-Rated Dry-Type)

  • K-Factor rated (K-13): Oversized neutral conductor (200% rated) and interleaved winding geometry to handle triple-n harmonic currents.
  • Dynamic thermal management: Embedded PT100 RTD sensors with optional AF mode providing 150% capacity for 30 minutes.
  • Compact & silent: 20% smaller footprint for parking structures; sound level ≤48dB(A) for units ≤1000kVA.

S13-M.EV Series (Oil-Immersed)

  • Amorphous metal option: S13-M.RL.EV achieves 65–70% lower no-load loss, critical for stations with high idle time between sessions.
  • Hermetically sealed: Zero maintenance for 20+ years, ideal for unmanned highway and rural charging hubs.
  • Metering ready: Optional integrated LV metering compartment for direct utility billing interface.

ZGS11-Z.CH Series (EV Charging Substation)

  • All-in-one package: MV ring-main unit + S13-M.EV transformer + LV distribution + harmonic filter cabinet in one weatherproof enclosure.
  • Plug-and-play: Factory pre-tested, delivered on skid, can be energized within 4 hours of delivery.
  • Active filtering: Integrated active harmonic filter (AHF) option for IEEE 519 compliance at the point of common coupling.
EV Charging Box Substation Installation

Recommended Products

SCB13-EV
Cast-Resin Dry-Type, EV Rated

200–2500 kVA

K-13 rated, compact footprint

S13-M.EV
Sealed Oil-Immersed, EV Rated

100–1600 kVA

Ultra-low idle loss, zero maintenance

S13-M.RL.EV
Amorphous Core, EV Rated

100–1250 kVA

70% lower no-load loss

ZGS11-Z.CH
EV Charging Box Substation

100–1250 kVA

Plug-and-play, AHF optional

Operational Track Record

  • 50+ SCB13-EV distribution transformers currently powering public fast-charging stations across urban and highway corridor locations.
  • Supplied complete ZGS11-Z.CH box substations for a network of DC fast-charging hubs — each station supporting 8–12 simultaneous charging bays (120–360kW per bay), in 24/7 operation since commissioning.
  • Delivered S13-M.RL.EV amorphous-core distribution transformers for a highway service-area charging network — no-load energy savings exceeding 4,500 kWh/year per 630kVA unit compared to conventional design, validated by utility metering data.
  • All EV-rated distribution transformer designs incorporate IEEE C57.110 K-Factor derating methodology and are factory-tested for harmonic load current compliance per IEC 61378-1 (converter transformer standard).

Technical Parameter Quick Reference

Parameter SCB13-EV Dry-Type S13-M.RL.EV Oil-Immersed ZGS11-Z.CH Box Substation
Rated Capacity 200–2500 kVA 100–1250 kVA 100–1250 kVA
K-Factor Rating K-13 K-9 K-13
No-Load Loss (630kVA) ≤1150W ≤280W ≤350W
Load Loss (630kVA) ≤6200W ≤6200W ≤6200W
Noise Level ≤48 dB(A) ≤50 dB(A) ≤55 dB(A)
HV Rating 10/11/20 kV 10/11/20 kV 10/11/20 kV
LV Rating 0.4 kV 0.4 kV 0.4 kV
Overload Capacity 150% / 30 min 120% / 2 hr 120% / 2 hr
Enclosure IP21/IP23 Outdoor IP55 Outdoor IP55