Description

Digital Transformer Ratiometer (Megabras Brand Only)
Description
The Transformer Ratiometer TR8703 is a lightweight, rugged, portable instrument designed for onsite testing of power, potential and current transformers. No user calibration, range selection, hand cranking or tedious balancing is required. During each test cycle, the TR8703 automatically checks for H/X lead reversal, continuity of tested circuits/windings (if configured) and short circuit conditions (high current).
Upon completion of a test cycle, the TR8703 displays the turns ratio, excitation current, polarity and deviation which are useful parameters in diagnosing and predicting a variety of faults that occur in power, potential and current transformers.
The TR8703 utilizes an advanced, low-voltage, step-down measurement technique in which the high voltage “H” windings are subjected to test excitation. This results in greater operator safety and the ability to test a much wider array of transformer types and sizes.
In addition, the TR8703 allows the user to store the data in automatic or manual mode after each test eliminating the need to write down the test results. Each measurement record is date and time stamped providing complete test information. The user can also save Nameplate voltages and compare the results as the data is being gathered. The data can later be downloaded to a PC and analyzed using a software which is included with the product.