True 3-Phase Transformer Turns-Ratio Tester

Vanguard Instruments Tri-Phase

FeaturesVanguard Instruments Tri-Phase

Provides a true 3-phase test voltage.Can measure phase angle relationship between the transformer’s primary and secondary winding.Automatically detects transformer vector diagram.Can test phase-shifting transformers. Conventional TTR’s cannot test this type of transformer.

Features (continued)Vanguard Instruments Tri-Phase

Can test transformer in single phase mode (line to neutral) and 3-phase mode (line to line).Turns-ratio reading range: 0.8 – 15,000.3 selectable test voltages: 8, 40, 100Vac.Measures excitation test current.

Features (continued)Vanguard Instruments Tri-Phase

Calculates turns-ratio percentage error.Provides Pass/Fail report for each test.Built-in Load Tap Changer controller.Built-in 4.5” wide thermal printer.

Features (continued)Vanguard Instruments Tri-Phase

Can be used in stand-alone or PC-controlled mode.Can store 112 transformer test records.Can store 128 transformer test plans.RS-232C and USB PC interface.USB Flash drive interface.

Typical Thermal Printer OutputVanguard Instruments Tri-Phase

Phase Angle Measurement

Turns-ratio Percentage Error

Typical Thermal Printer OutputVanguard Instruments Tri-Phase

Nameplate Ratio

Measured Ratio Percentage Error

Phase Angle Measurement