Product features • VIZ-75: 8.7 kV, 75 kV BIL • VIZ-11: 15 kV, 110 kV BIL • Indoor, 60 Hertz • Primary volts: 2400 - 14400 • Average operating temperature: -5°C to 55°C • Maximum operating temperature: 65°C • UL Recognized Component, File No. E148620
Application VIZ-75 and VIZ-11 indoor voltage transformers are designed for service in metal-clad switchgear and are used for metering, relaying, or control power. Both units are available in single, double, and tapped secondary designs with two accuracy and thermal rating options.
Construction features The primary and secondary coils are wound using special winding and shielding techniques for improved voltage stress distribution. The coils are designed to withstand continuous operation at either 1.1 or 1.25 times the line-to-line voltage level for Z burden units and 1.9 times the line-to-ground voltage level for Y burden units. Each coil is insulated with mylar film to provide a high dielectric strength between layers. The coils and core are combined to create a complete winding structure that is assembled to a support frame. The entire assembly is vacuum cast in polyurethane for added insulation and protection.
Fuse classifications These units are provided with three fuse classifications: mounted fuse with hardware, unfused with hardware, or unfused without hardware. Optional fuse kits are offered to convert unfused styles to fused styles.
Mounting The VIZ-75 and VIZ-11 can be mounted in upright, cantilever, or upside-down positions.
Test reports Test reports are stored electronically and can be emailed in various formats at the time of shipment.
Standards This unit can be tested to all applicable IEEE, CSA, or IEC standards as requested.
