Megger MTO250 Transformer Ohmmeter

The Megger MTO250 is a transformer ohmmeter with the capacity to test transformers up to 1000MVA and perform DC current testing up to 50A. A line-operated and field-ready unit built to determine magnetic winding resistance safely and precisely, the Megger MTO250 tests transformers, rotating machine windings, shunt reactors, and can be utilized for low resistance measurements on contacts, connections, and control circuits.

Product Info Related Products

Input	85-264 VAC. 47-63 Hz, 1500 VA
Output - User Selectable Current Ranges	1 A/ 10 A /25 A/ 50 A
Open Circuit Voltage	50V DC
Typical Accuracy	±0.1 % reading, ±0.1 % range
Best Resolution	0.1 μΩ
Typical Accuracy	±0.1 % reading, ±0.1 % range
Guaranteed Accuracy	±0.25% reading, ±0.25% range (once current has stabilized)
Current Resolution	4 digits
Current Accuracy	±0.25%, ±0.25% range
Dimensions	8.5 H X 21.5 W X 13 D in (216 H x 546 W x 330 D mm)

Capable of testing transformers up to 1000 MVA
DC test current up to 50 A maximum
Integrated demagnetisation feature
Computer control and internal data storage
Validates proper operation of on-load tap-changers
Protected against accidental current lead disconnection (through potential leads)

Perform field testing of CT, PT. power transformer windings and their associated tap changers, and motors/generators
Verify factory winding resistance test results
Perform factory heat run tests
Diagnose and pinpoint problems such as the presence of defects in transformers, such as loose connections, and poor tap changer operation
To validate proper "make-before-break" operation of load tapchangers (LTC)

SKU: MEGG-MTO250

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Highest accuracy on the market - up to 0,03%.

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Auto discharge circuit for operator safety
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1-62.5 V AC
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