Specialized in Electrical Power Test and Measurement Instruments since 1999 TTR-400 Transformer Turns Ratio Meter ◆ Measures turns ratio, voltage ratio, phase displacement ◆ Automatic winding connection identification and vector group detection ◆ 7” touch screen for easy operation ◆ Simplistic user interface for quick test setup ◆ Save the test results on-board ◆ Download test results via USB interface ◆ Print the test results via built-in printer ◆ Supplied in a compact and rugged case for portability Descriptions Transformer Turns Ratio Meter TTR-400 is designed to measure the voltage ratio and turns ratio of singe phase or three-phase distribution transformers or power transformers in a substation or manufacturing environment according to test standard IEC 60076 and IEEE C57.12.90. Technical Data ◇Test Standard: IEC60076 and IEEE C57.12.90 ◇Ratio Measurement range: 0.9-10000 accuracy: ◇Phase Angle Measurement range: ±180° accuracy: ±0.1° resolution: 0.01° ◇Test Voltage:0~160V ◇Internal Data Storage: up to 1000 data sets ◇Built-in Printer for printing test results directly ◇Power Supply: customized(AC220V/230V,50Hz/60Hz optional) ◇Dimension: 360x290x170mm(14.17x11.42x6.69 in) ◇Weight: 5.9kg(13.01 lb) ◇Environmental Conditions storage temperature: -20℃~60℃ humidity: <90% operating temperature: -10℃~50℃ ◇Safety Qualifications and EMC Safety: designed in accor