2000kVA Pad Mounted Transformer for Battery Energy Storage Auxiliary Power


  • Primary Voltage Ratings: 34500 Delta
  • Secondary Voltage Ratings: 480Grdy/277
  • CONNECTION TYPE: Dyn1
  • TYPE: 3 phase pad mount
  • BIL: 150/30
  • Standards: ANSI, IEEE, NEMA
  • Application: Battery Energy Storage Auxiliary Power
  • Power Rating: 2000kVA
  • Certificate: UL
  • Cooling Method: KNAN

Daelim Transformer’s 2000kVA, 34.5kV pad-mounted transformers are deployed in a Battery Energy Storage System (BESS) in Kern County, California, where they provide reliable auxiliary power to support various equipment within the energy storage station. Completed in May 2024 and delivered to American customers, these transformers are essential to ensuring uninterrupted operation and efficient energy storage management.


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Project location: KERN COUNTY, CA
Ambient temperatures Min -15.0°C, Maximum 41.0°C, 24-hour average maximum 33.0°C
Elevation <3300 Feet
Seismic conditions: Risk Category: II, Site Class D
SS = 1.28 g, S1 = 0.43 g, SMS = 1.54 g, SM1 = 1.09 g, SDS = 1.03 g,SD1 = 0.73 g

 

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2000kVA Pad Mounted Transformer with lv switchboard
 

High Side (Primary)

High Side (Primary)

Nominal operating (phase-to-phase) 34.5kV
Maximum operating (phase-to-phase) 38kV
Winding configuration Delta
Bushing rating 600A
Winding insulation 200kV BIL
Bushing insulation 200kV BIL
Bushing qty Six (Loop Feed)
Short circuit withstand 30kA
Disconnect  LBOR Switch
Disconnect switch quantity One (1) 3-Phase
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Low Side (Secondary)

Nominal operating (phase-to-phase) 480V
Winding configuration Grounded Wye
Winding and bushing insulation BIL 30KV BIL
Short-circuit withstand 65 kA*
LV bushing spade hole qty (8) NEMA 2-hole
Routine overvoltage factor 110%
Resistance grounded No
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Low Side (Secondary)
Misc.

Misc.

Ground bus Yes
Control circuit supply voltage 277V AC
Circuit breaker specification UL listed
Suitable for service entrance Yes
Dimension(in) W*D*H: 83.9*94.7*95.3
Tank & Accessories 4,630lbs
Oil of volume 900Gal
Total Weight 21,600lbs
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Key Features & Benefits

Efficient Power Distribution for Energy Storage

The 2000kVA transformers are designed to step down from Medium Voltage (MV) to Low Voltage (LV), making them ideal for integration with switchboards in energy storage systems. This stepdown configuration is essential for ensuring smooth and reliable power distribution to auxiliary equipment, supporting the overall efficiency of the BESS infrastructure.

2000 kva pad mounted transformer connected with distribution switchboard
 

Sustainable & Cost-Effective Cooling

In line with Daelim Transformer's commitment to sustainability, the transformers utilize biodegradable oil as the coolant fluid. This environmentally friendly solution not only offers superior insulation properties but also supports energy efficiency. The PAPO brand biodegradable oil used in these transformers provides the same performance as FR3 oil but at a significantly lower cost, allowing customers to benefit from both enhanced performance and reduced operational costs.

Durability & Safety Built-In

  • NEMA 3R Enclosures: Our transformers are housed in NEMA 3R-rated electrical enclosures that are rainproof, iceproof, and snowproof, with built-in drainage facilities. These enclosures provide robust protection against the elements, safeguarding the internal electrical components and ensuring long-term durability even in harsh environmental conditions.
  • Anti-Tampering & Security Features: Designed with security in mind, the transformers feature alternate locking and latching mechanisms to prevent unauthorized access and tampering, reducing the risk of theft and ensuring safe operation at all times.

User-Friendly Design for Safety & Efficiency

The low-voltage side of the transformer features a special side-mounted design with a throat for easy connection to the switchboard. Externally mounted gauges, sample valves, and drain systems are housed in a lockable cabinet with a five-point bolt lock. This unique design allows operators to safely inspect the oil levels, test the gauges, and perform maintenance tasks without exposing themselves to high-voltage (HV) or low-voltage (LV) bushings, significantly enhancing safety and operational efficiency.

pad mounted transformer external gauges
Advanced Monitoring & Remote Alerts

To ensure continuous, optimal performance, the transformer is equipped with oil level and temperature indicators that feature two contact points for remote monitoring. These indicators provide real-time data to operators, sending alarm signals when the oil level is too high or too low. Additionally, if the temperature of the coolant fluid exceeds 85°C, the system will trigger an alarm. Should the temperature rise above 105°C, the transformer will automatically disconnect from the grid to prevent overheating and potential damage, ensuring the safety and reliability of the system.

Quality & Compliance

Daelim Transformers are manufactured in strict compliance with industry-leading standards, including UL, ANSI, IEEE, and NEMA, ensuring top-tier performance, reliability, and safety. Our commitment to quality and innovation guarantees that each transformer is built to the highest specifications, delivering dependable service across the lifespan of the equipment.

Why Choose Daelim Transformer?

With decades of engineering expertise and a focus on sustainable, cost-effective solutions, Daelim Transformer is the trusted partner for advanced energy storage projects. Our transformers are engineered to withstand the challenges of modern energy systems, providing outstanding performance, security, and reliability—no matter the conditions.

As the energy industry continues to evolve toward cleaner and more efficient solutions, Daelim Transformer stands at the forefront, delivering cutting-edge, environmentally responsible technology for a brighter, more sustainable future.

Choose Daelim Transformer for exceptional performance, safety, and sustainability in energy storage solutions.

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