33–35kV Class Pad-Mounted Transformers

33–35kV Class Pad-Mounted Transformers

High-voltage, oil-immersed transformers built for heavy industrial loads, end-of-line substations, and long-distance distribution. With 33–35 kV primary ratings and sealed enclosures, they deliver safe, reliable outdoor performance in demanding environments.

What Are 33–35 kV Class Pad-Mounted Transformers?

33–35 kV Class Pad-Mounted Transformers are high-voltage, oil-immersed distribution transformers designed for outdoor ground-level installations. Enclosed in tamper-proof steel cabinets, they provide safe, reliable power transformation from 33 kV or 35 kV to low-voltage outputs such as 400 V, 480 V, or 600 V.

These transformers are ideal for heavy industrial zones, end-of-line substations, renewable energy collection points, and long-distance primary distribution systems where compact design and robust performance are essential.


Why Use 33–35 kV Class Pad-Mounted Transformers?

High-Voltage Capability

Built for ANSI 35 kV class systems, these transformers handle high short-circuit currents and large power demands in primary or sub-transmission networks.

Outdoor Durability

Sealed tank design with weatherproof, corrosion-resistant enclosures ensures long-term performance in challenging climates—rain, heat, dust, or humidity.

Utility-Ready Configuration

Pre-installed with bushings, fuses, switches, and grounding systems, they support both radial and loop feed applications in utility and industrial networks.


Key Features of 33–35 kV Class Pad-Mounted Transformers

Construction

Oil-filled, sealed steel tank with natural convection cooling (ONAN), and optional radiators for heat dissipation.

Voltage Ratings

Primary: 33 / 34.5 / 35 kV
Secondary: 208 / 240 / 277 / 400 / 480 / 600 V (customizable)

Tap Changing

Equipped with off-circuit tap changers (±2×2.5%) or on-load tap changers for voltage adjustment.

Protection and Monitoring

Includes pressure relief valves, oil level gauges, temperature indicators, bayonet fuses, lightning arresters, and optional CSP (completely self-protected) features.

Cabinet Design

Tamper-proof, ANSI/IEEE-compliant enclosure with dead-front or live-front access. Available in single- or three-phase configurations.


Applications of 33–35 kV Class Pad-Mounted Transformers

  • Utility substations and long-distance distribution

  • Industrial plants with high-capacity machinery

  • Wind or solar energy collection points

  • Airports, ports, and logistics centers

  • Heavy commercial and infrastructure developments


Standards and Compliance

International Standards:
ANSI C57.12.34, IEEE C57.12.00 / C57.12.28, IEC 60076, CSA, GB

Testing:
100% routine tests as per IEEE/IEC; type and special tests available upon request

Certifications:
CE, ISO9001, ISO14001, ISO45001, RoHS (on request)


Advantages of 33–35 kV Class Pad-Mounted Transformers

  • Supports high-load, high-voltage distribution

  • Compact ground-mounted design with low installation cost

  • Maintenance-free sealed tank with long service life

  • Suitable for harsh outdoor environments

  • Fully customizable voltage, impedance, and terminal configuration


Choose CHBEB

Choose CHBEB 33–35 kV Class Pad-Mounted Transformers for high-voltage power distribution that demands durability, safety, and performance. With over 60 years of manufacturing experience, CHBEB delivers advanced transformer solutions for utilities, EPCs, and energy-intensive industries worldwide.


👉 Technical Specifications:
Please refer to the table below for detailed specifications of our 33–35 kV Pad-Mounted Transformer Series:

Rated Capacity

KVA

High Voltage

KV

Low Voltage

KV

Tapping Range&

Vector symbol

Loss(W)
No-load On-load
30KVA  

 

6.3KV

7.2KV

7.62KV

8.6KV

12.47KV

13.2KV

13.8KV

19.8KV

19.92KV

23KV

34.5KV

35KV

 

To be requested by customers

 

 

 

 

 

 

 

110V

220V

230V

240V

347V

480V

277V

600V

 

 

 

 

 

±5 (±2*2.5)

 

Yyn0

Dyn11

110 500
63KVA 200 1040
75KVA 180 1250
125KVA 220 1700
150KVA 280 2200
225KVA 400 3050
300KVA 480 3650
500KVA 680 5100
750KVA 980 7500
1000KVA 1150 10300
1500KVA 1640 14500
2000KVA 2160 20645
2500KVA 2680 27786
3000KVA 3300 30300
3750KVA 4125 37875