• Currents up to 200A for performing Winding Resistance and Heat Run Tests.

• Heavy Duty Protection Circuit.

• Accuracy with Four Wire Measurements 0.1% of reading + 1μΩ.

• Accurate Liquid and Surface Temperature Measurements, 14 inputs for PT100s/RTDs and 6 thermocouples.

• Two Current Leads and Three Sets of Potential Lead.

• User Friendly Software with Auto & Manual.

The AWRMS™ 200 is a computer controlled test system developed for measuring Transformer Resistance and for performing Heat Run Tests in highly inductive loads. A single source with a 100V DC test voltage is used to saturate even the largest transformer within seconds. A heavy-duty protection circuit dissipates the stored magnetic energy rapidly after the test. An automatic Tap Changer speeds up the measurement of all the windings. Optimum accuracy for the resistance measurements is achieved using the four-wire principle of resistance measurement.

The AWRMS™ 200 is capable of measuring the resistance of up to three windings connected n series simultaneously. The DC of the 25kW supply is continuously adjustable up to 200A for testing windings in large transformers, electric motors, generators, and reactors. Up to 40 temperature channels consisting of PT100s or Thermocouples can be supplied.

INDUSTRY APPLICATIONS

The AWRMS™ system is primarily used for:

• Transformer and Rotating Machinery Manufacturers.

• Power Utilities.

• Electric Contractors.

• Govt. and Private Labs, and Service or Maintenance Companies.

SYSTEM APPLICATIONS:

The AWRMS™ 200 is capable of the testing both three-phase (Y-Wye, Δ-Delta, or Mixed) and single-phase power subsystems [(VA to MVA); (fractional HP to kHP or W to MW)]:

• Electric Motors, Generators, and Reactors.

• Busbar Contacts & Joints and Bushings.

• Power Cables, Relays, and Circuit Breakers.

DESCRIPTION

The AWRMS™ 200 can be used in either stand-alone or conjunction with the MIL series of AccuLoss™ Loss Measurement Systems. The system is capable of performing both cold and hot resistance measurements on winding resistance.

Built into a steel enclosure on wheels the AWRMS™ 200 can be moved about easily and effortlessly. Two current cables and six potential cables are available for connection to the UUT. Standard cable length is 20m.

Cables up to 30m and longer are available at time of order. The current and potential cables are supplied with clips (insulated and color coded for each channel) for easy connection to the poles of the transformer (UUT). Additional c ables are available as an option.

14 PT100’s and six thermocouples come standard with optional expandability for up to 40 for measuring both oil and case temperatures. At the time of order, you can choose your configuration of either oil or case mounted.

All measurements are fully automatic and require no adjustments. The measurements are performed in accordance with the IEEE, IEC and other International standards.

Several safety circuits are built into the AWRMS™ 200 including overvoltage protection on the output of the DC Power Supply.

AWRMS™ FEATURES

Measurement Capabilities:

A source compliance of up to 100 VDC @ 250A (continuously variable) is used for measuring the winding resistance. The hot resistance is automatically temperature compensated for copper and aluminum windings (using a standard or customized reference temperature).

System Accuracy:

4-Wire Measurement Technique allows the use of long measurement leads for measuring the winding resistance without sacrificing accuracy. (See the System Specifications at the end).

Operating Convenience:

The system is computer controlled and fully automated for all measurements. There is no manual intervention required when operating in the Auto Mode.

Exceptional Reliability:

The components used in the AWRMS™ 200 are of the highest quality, and designed and manufactured for a rugged environment.

Software:

The AWRMS™ 200 Software provided with the system is written in LabVIEW™. The test results are outputted in a tabular format to an ASCII file for easy importing to an Excel spreadsheets. Upon turning the system software on, a built in self diagnostic routine scans each instrument for functionality.

AWRMS™ 200 Software Features:

User friendly program for hot and c old Resistance measurements.

The program offers Auto and Manual Modes and flexibility for customization.

Hot Resistance Software outputs temperature rise or cooling curve results in either graphical or tabular form.

All results in ASCII file c an easily be c onverted to Word, PDF, HTML , XML , CSV, etc.