The MLR10 10 A leakage reactance tester is used to measure leakage reactance and other associated parameters in high voltage power transformers. Leakage reactance, or more generally leakage impedance, is measured at the transformer primary winding while the secondary winding is shorted. Ideally, a transformer’s primary and secondary windings should be 100 % coupled by magnetic flux, but in real transformers there is always a small amount of leakage flux. Leakage inductance is a result of this leakage flux.

With the use of the MLR10’s optional capacitance test probe, electrical measurements can be isolated to individual legs of a complex capacitive bank network. The MLR10 ac voltage source is applied across the appropriate capacitor section (containing the capacitance of interest) and the optional capacitance test probe is used to isolate the measurements specific to the capacitor of interest. The MLR10 is offered as a standalone unit that requires the use of an external PC running Megger’s free MLR10 software.The MVCT VT and CT test set is a lightweight, portable, and robust unit capable of accurately testing both current and voltage transformers. It weighs less than 20 lb (10Kg) and is capable of performing saturation, ratio, polarity, winding resistance, and insulation tests on current transformers, and can also be used for testing metering and protection class voltage/potential transformers.

The MVCT provides a microprocessor-controlled variable voltage and current output along with precision instrumentation for automatically testing single and multi-ratio CTs and VTs. When it comes to CTs, this instrument makes testing easy. It will directly connect to multi-ratio CTs and perform all tests – saturation, ratio, polarity, winding resistance, and insulation – on all taps at the push of a button and without changing leads. This greatly reduces testing time.

The MVCT can be operated via its large, full colour, high resolution, daylight-readable TFT LCD touch screen display. This interface allows you to perform manual and automatic testing quickly and easily, and you can use the pre-constructed test routines to make testing even easier. The large colour display also enables you to easily read all pertinent data while the test is being performed and gives you the ability to view the results when the test is complete. The unit can also be configured to come without a display and thus be controlled via a laptop using Megger's PowerDB software or with Megger’s existing Smart Touch View Interface™(STVI).