4400 kVA Pad Mounted Transformer

  • Primary Voltage Ratings: 34.5kV Delta
  • Secondary Voltage Ratings: 480V Grounded Wye
  • H.V. TAP RANGE: +/- 2@ 2.5% HV taps
  • TYPE: Dead Front loop feed HV configuration
  • BIL: 150/30kV
  • Standards: IEEE
  • Application: BESS (Tesla Megapack)
  • Power Rating: 4400kVA
  • Certificate: UL
  • Cooling Method: KNAN

The 4400 kVA pad-mounted transformer is specifically designed for BESS (Battery Energy Storage System) projects. It features a dual low-voltage design, allowing both sides of the transformer's low voltage to connect to two Tesla Megapack 2XL. This transformer is suitable for 4-hour systems. Daelim Transformer possesses extensive experience in BESS projects and can meet any technical requirements. Contact Daelim Transformer now for tailored solutions and quotations.

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  • Power Rating: 4400kVA
  • Primary Voltage: 34.5kV Delta
  • BIL HV 150kV
  • Secondary Voltage: 480V Grounded Wye      
  •  BIL LV 30kV       
  • Phase: 3-Phase (4 Wire)
  • Frequency: 60 HZ
  • Temperature Rise: 65 °C @ 46°C Ambient
  • Cooling Class: KNAN
  • Impedance: 6.50% +/- 7.5% @4400kVA

Contact Daelim Transformer for special requirements

  • Fuse: Bay-O-Net and back-up current-limiting
  • HV bushing： one-piece 600A HV bushings in HV connection cabinet
  • Switch: a HV two-position load break oil-immersed rotary switch
  • Grounding: ​​​​​​​HV Compartment to have a standard NEMA two-hole ground pad
  • Gauges: ​​​​​​​liquid thermometer, liquid-level, and pressure/vacuum gauges with Form C alarm contacts prewired to terminal blocks in externally accessible enclosure
  • Valve:  Schrader-type valve; ​​​​​​​a cover-mounted automatic pressure relief valve as required to prevent tank rupture; oil drain, fill, and oil sample and pressure relief valves
  • Nitrogen blanket: Yes
  • Finish Color: RAL-7035
Daelim Transformer Certificates

The transformer meets both UL and IEEE standards with a K2-factor. It utilizes biodegradable natural ester insulating fluid and features a sealed-tank construction for step-down, bi-directional operation. An electrostatic shield separates the HV and LV windings, complemented by an externally accessible ground shield bushing. It is equipped with a NEMA 3R protection level termination cabinet, incorporating a 14-hole grounding bus plate compatible with NEMA two-hole ground lugs in the LV compartment. LV Spade terminals are designed to accommodate a horizontal lug spacing of 2.0, featuring continuous windings without splices.

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