The 3VTL460-480 is a three-phase voltage transformer designed for line-to-line connection. It has a primary voltage of 480 V and a secondary voltage of 120 V, with a 4:1 turns ratio, operating at 60 Hz. It is built for metering and monitoring applications with a 10 kV BIL insulation rating and accuracy class 0.6 W, 1.2 X per phase.

Detailed Specifications & Description

• Type & Application

  • Three-phase voltage transformer (VT) for line-to-line operation.
  • Used in industrial metering, monitoring, and instrumentation systems.
  • Provides safe, reduced-voltage signals for meters and protective relays.

• Electrical Ratings

  • Primary Voltage: 480 V (line-to-line)
  • Secondary Voltage: 120 V (line-to-line)
  • Turns Ratio: 4:1
  • Frequency: 60 Hz
  • Insulation Level: 600 V, 10 kV BIL (Basic Impulse Level)

• Accuracy & Performance

  • Accuracy Class (per phase): 0.6 W, 1.2 X at 60 Hz
  • Thermal Rating (per phase):
    • 150 VA at 30 °C ambient
    • 100 VA at 55 °C ambient

• Construction Features

  • Assembly of three transformers in one case.
  • Core and coil assembly encased in thermoplastic shell and resin-filled.
  • Clear plastic cover for terminal protection.
  • Primary & secondary terminals: No. 8-32 screws into brass inserts with lockwasher and flatwasher.
  • Approximate weight: 24 lbs.
  • Spacing between live parts meets UL 1558 standards.