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  • 5-75 kVA/5-167 kVA Completely self-protected single-phase overhead transformer
5-75 kVA/5-167 kVA Completely self-protected single-phase overhead transformer
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D-50
Basic info
Brand Vziman
Model NO. 5-75 kVA/5-167 kVA Completely self-protected single-phase overhead transformer
Rated frequency 50/60Hz
Primary voltage 2400-19920 V
Secondary voltage 120-600 V
Capacity range 5-167 kVA
Series D-50
Product Detail

Description：

Single - phase overhead transformers with Complete Self - Protection (CSP) feature extremely outstanding performance. They integrate directly - connected primary surge arresters, MagneX arc - extinguishing chambers, or secondary circuit breakers with built - in primary voltage fuses. There is no need to install additional independent protection devices, effectively reducing installation costs. The power range of these transformers is from 5 - 75 kVA (up to 5 - 167 kVA when equipped with MagneX arc - extinguishing chambers), and they can be filled with standard electrical - grade mineral insulating oil or fire - resistant FR3 liquid.

Features：

  • Equipped with internal over - current devices and surge arresters for over - voltage protection, eliminating the need for additional external protective equipment.
  • Secondary fault and overload protection can be achieved through secondary circuit breakers with weak links or optional MagneX arc - extinguishing chambers.
  • Performance meets or exceeds industry standards, covering ANSI, NEMA, and DOE energy - efficiency standards.
  • Adopts the interlaced core design recommended by EPRI.
  • The core and coils are designed for high reliability and low field failure rates, offering options of grain - oriented steel or amorphous steel.
  • The dome cover design combined with the formed cover strip enhances withstand voltage capabilities, eliminates bushing overhang, and improves cover retention.
  • The high - voltage bushing design optimizes washer protection and sealing performance.
  • Can be configured in accordance with Rural Utilities Service (RUS) specifications.

Technical Parameters：

Specifications：

  • Meets or exceeds ANSI, NEMA and DOE2016 standards
  • IEEE, C57.12.00, C57.12.20, C57.12.31, C57.12.35, C57.12.90, C57. 91 and C57.154
  • NEMA standards, NEMA TR 1 (R2000)
  • Department of Energy Efficiency Standard, 10 CFR Part 431
  • Tank coating exceeds IEEE Std C57.12.31-2010 standard
  • Cover with a minimum dielectric strength of 8 kV
  • FR3 fluid or electrical grade mineral oil
  • Cores and coils designed for high reliability and low field failure rates: Available in grain-oriented electrical or amorphous steel
  • Heavy-duty lifting lugs and hanger brackets per ANSI requirements up to 4500 lbs
  • The transformer shall be designed in accordance with this specification and shall have an Average Winding Rise (AWR) of one of the following:
  • 55 °C, 55/65 °C, 65 °C
  • The applicable AWR rating shall be specified on the inquiry
  • The transformer shall be designed in accordance with this specification and shall have one of the following kVA ratings:
  • 5, 10, 15, 25, 37.5, 50, 75, 100, 167
  • The applicable kVA rating shall be specified on the inquiry
  • Quality System ISO 9001 certified
  • Configurable to Rural Utilities Service (RUS) specification
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