Polyphase Transformer-Rated Application – Watch Instant Video

Training Sessions

Polyphase Transformer-Rated Metering
Delta Transformer-Rated Meter Installations
Wye Transformer-Rated Meter Installations
Instrument Transformer Verification
Training Sessions

Polyphase Transformer-Rated Metering – 10 minutes
Describes the functions of the two basic types of instrument transformers commonly used in metering. Identifies variables that affect the installation of current transformers and meters.


Delta Transformer-Rated Meter Installations – 9 minutes
Describes a typical three-phase, three-wire, delta transformer-rated meter installation. Describes a typical three-phase, four-wire, delta transformer-rated meter installation. Describes one way to determine the instrument transformer requirements for a given delta transformer-rated meter installation.

Wye Transformer-Rated Meter Installations – 7 minutes
Describes a typical three-phase, four-wire, wye transformer-rated meter installation. Shows one way to determine the transformer requirements for a typical wye transformer-rated meter installation.

Instrument Transformer Verification – 10 minutes
Describes problems that can develop with instrument transformers. Shows how some of the electrical properties of instrument transformers can be checked. Demonstrates how a meter on a polyphase installation can be checked to ensure proper registration.