Wählen Sie Ihre Region und Ihre Sprache



Inductive Voltage Transformer Type SPOF (25-38 kV)

Compact and robust

SPOF outdoor rated distribution class inductive voltage transformers are of compact single-phase designs and intended for connection between phase and ground (single bushing) or phase-to-phase (two bushing design) to provide critical voltage measurement information. Hermetic sealing of the design is accomplished using a gas cushion above the oil to prevent free-breathing outside moisture-laden air.

The extremely low core flux density enables the SPOF to withstand continuous 110 percent rated voltage continuously, and provide 190 percent for 8 hours.  

The SPOF has a reputation for reliable performance in service with a low field failure rate that is lower than the industry average.


  • Revenue metering
  • Control
  • Indication
  • Relay protection

Why Hitachi Energy?

  • Designed for environmentally diverse conditions - polar to desert
  • Excellent application engineering support ensures optimal solutions for your project
  • Low loss distributed gap core ensures the best accuracy performance with the lowest core losses for the duration of service life
  • Small footprint, eco-efficient minimum-oil design
  • Maximum reliability and minimal maintenance 

Brief performance data

Installation Outdoor
Design Inductive type
Insulation Oil-paper
Highest voltage for equipment 25 - 38 kV
Voltage factor (Vf) Up to 1.9 - 8hrs
Insulators Cycloaliphatic epoxy
Creepage distance ≥ 25 mm/kV (longer by request)
Service condition  
  • Ambient temperature
-40ºC to +40ºC (standard)
  • Design altitude
Maximum 1000 m (standard)
  *Other temperatures and altitudes are possible
Accuracy Meets all IEC and IEEE metering and protection classes
power plant engineer for substation
Contact us

Submit your enquiry and we will contact you