Overview

The TRAN series of instruments are designed to measure the turns ratio and winding resistance of three-phase and single-phase transformers. Via its user-friendly interface, the TRAN instrument/s provide a fast and accurate assessment of key transformer parameters.

TURNS RATIO MEASUREMENT

The TRAN instrument/s employs elements of performance tests specified in the ANSI/IEEE C57.12.90 standard. With market-leading accuracy, the TRAN instrument has a very wide ratio measurement capability, (0.8 to 50,000) at a precision of 0.08 %. Other features include the measurement of core excitation current, phase angle, polarity, ratio error and magnetic balance. Even though TRAN has a three-phase cable configuration, users can also perform single-phase transformer tests. TRAN instrument can detect vector groups automatically. The instrument has a wide operating range for use on equipment such as high excitation current transformers and high power potential transformers in substations. The instrument can generate 1V, 4V, 10V, 40V, 100V, 250V and 430V AC test voltages.

WINDING RESISTANCE MEASUREMENT

Applying up to 20 Amps of direct current allows the TRAN series to measure the resistance of three-phase transformer windings quickly and accurately. TRAN instrument/s is designed to measure the resistance of the primary and secondary transformer windings simultaneously without the need to disconnect and reconnect the test cables. Starting at 0.1 μΩ, the TRAN series can measure up to 100,000 Ω of resistance. The instrument can also measure the dynamic resistance of on-load tap changers, (OLTCs) simultaneously on all three phases or one phase at a time. The TRAN series can demagnetise the transformer to mitigate the build-up of remanence or residual magnetism due to the testing. The instrument also has a temperature measurement input which when connected to an optional temp sensor allows the TRAN series to perform temperature correction or adjustments to its measurements. In the case of a failure in the current circuit the TRAN instrument/s intelligent software controls the flow of current to mitigate damage and provide added safety for users.

GENERAL FEATURES

• Colour touch display
• Independent or PC-based control via Data Management
• Platform (DMP Software)
• Optional Bluetooth interface
• Instrument and/or PC-based results analysis
• Built-in 2.28-inch Printer
• Optional internal battery models are available
• Multi-language capability
• Tap changer control outputs
• Light, compact and rugged device with an IP protection class of IP67, (case closed)