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The MI 3281 Winding Resistance Analyser (WR Analyser) is a portable test instrument designed to diagnose the winding resistance of single and three phase transformers with manual or automatic tap changer tests and demagnetization features. Backed by rigorous standards such as IEC 60076-1, IEC 61869-2, IEEE C57.12.90, IEC/EN 61010-1 and others, the WR Analyser offers selectable test current up to 20 A with 4.3” color LCD display featuring touch screen for easy readability of results. With built-in help screens and automatic winding resistance tests of transformers with On-Load or No-Load Tap Changer, the analyser also features automatic discharge, EMERGENCY STOP switch and the ability to store test results on the instrument. Moreover, with PC SW Metrel ES Manager for creation of test structures and uploading/downloading of test results, Auto Sequence® editor and report generation are available as well. With applications such as power distribution and industrial installations that aid in transformer ratio, winding resistances and fault currents with hot factor diagnosis, the WR Analyser weighs 9.3 kg (with batteries and accessories) and has a dimension of 470 X 190 X 370 mm. Perfect for electrical equipment measurement, control and laboratory use, the WR Analyser is an ideal tool for diagnosing winding resistance of transformers.
Standards applied
Electrical Energetics
- IEC 60076-1 Power transformers Part 1: General
- IEC 61869-2 Instrument transformers Part 2: Additional requirements for current transformers
- IEEE C57.12.90 Standard Test Code for Liquid-Immersed Distribution, Power, and Regulating Transformers
Instrument safety towards user
- IEC/EN 61010-1 Safety requirements for electrical equipment for measurement, control, and laboratory use – Part 1: General requirements
- IEC/EN 61010-031 Amendment 1 – Safety requirements for electrical equipment for measurement, control and laboratory use – Part 031: Safety requirements for hand-held and hand-manipulated probe assemblies for electrical test and measurement
- IEC/EN 61010-2-030 Safety requirements for electrical equipment for measurement, control, and laboratory use – Part 2-030: Particular requirements for equipment having testing or measuring circuits
EMC safety
- IEC/EN 61326 Electrical equipment for measurement, control and laboratory use – EMC requirements – series
- IEC/EN 61326-1 Electrical equipment for measurement, control and laboratory use – EMC requirements – Part 1: General requirements
Properties
Measuring functions
Available functions and features offered by the WR Analyser:
- Winding resistance measurement of single and three phase transformers;
- Winding resistance measurement of single and three phase transformers with manual or automatic tap changer test (automatic measurement of all windings);
- Demagnetization of single and three phase transformers.
Key features
- Selectable test current up to 20 A.
- Automatic winding resistance tests of transformers with On-Load or No-Load Tap Changer.
- Automatic discharge after finished measurement.
- Built-in help screens for referencing on site.
- EMERGENCY STOP switch in case of any emergency situation.
- A 4.3” color LCD display with touch screen offers easy-to-read results and all associated parameters.
- The operation is straightforward and clear to enable the user to operate the instrument without the need for special training.
- Test results can be stored on the instrument.
- PC SW Metrel ES Manager for creation of test structures and uploading, downloading of test results, Auto Sequence® editor and report generation.
- Generation and printing of reports (optional)
- BT communication with PC, Android tablets and smart phones via built-in BT.
- Winding resistances conversion to a desired reference temperature.
- Degree of protection IP 65 (case closed), IP 40 (case open).
Technical data
- Dimensions (w x h x l): 470 X 190 X 370 mm.
- Weight (with batteries and accessories): 9.3 kg
