GENERAL INFO & MAIN BENEFITS
The AWRMS™ 50 is a computer controlled dual source test system for Vector Group Detection, Ratio and Resistance Measurements on medium and large transformers. The maximum current is 50 A. The AWRMS™ 50 was developed as a fully automated system. It uses one set of cables for Hot/Cold Resistance and Ratio measurements. Multiple temperature measurements points can be logged during Heat Run Tests. The system incorporates an automatic tap changer. Only one set of connections has to be made to support all the measurements. The software controls, measures and supervises all of the measurements.
Up to 20 temperature channels are available on each model.
The AWRMS™ 50 is best performing, versatile, most accurate low cost system on the market. For higher currents see our AWRMS™ 200.
The AWRMS™ system is primarily used for:
The AWRMS™ 50 is capable of the testing both the three-phase (Y-Wye, Δ-Delta, or Mixed) and the single-phase power subsystems [(VA to MVA); (fractional HP to kHP or W to MW)]:
The AWRMS™ 50 can be used standalone or in conjunction with the MIL’s series of AccuLoss™ Loss Measurement Systems. The standard system is capable of performing all measurements in one set up including checking the vector group, ratio and resistance and features an automatic tap changer. Twelve PT100’s come standard with expendability up to 40 for measuring oil and case temperatures. There is no need to intervene saving time and money. All measurements are performed in accordance to the IEEE and other International Standards (ANSI, IEC, NEMA, & VDE).
Built into a tough steel enclosure on heavy-duty castors, the system can be moved about easily. Long, current-, potential-, and temperature- measurement cables (up to 30 m) are supplied.
Seven current cables (3 each for the high and low side and 1 for the high side neutral) and eight potential cables (4 each for the high and low side including the neutral) are available for connection to a three phase transformer (usage of the neutral cables are optional). Single phase transformers require only four current cables (2 from each side). Current and potential cables have clamps (insulated & color coded for each phase) for easy clipping to the poles of a transformer (UUT).
The same cables are used for both the winding- resistance and ratio measurements. Current and voltage are selected on the two power supplies automatically.
Source compliance of up to 60 Vdc @ 50 A (continuously variable) is used for cold resistance measurements. The hot resistance is automatically temperature compensated for copper and aluminum windings (using a standard or customized reference temperature). Resistance range from 1 μΩ to 500 Ω. Ratio from 1 to 10,000.
4-Wire Measurement Technique allows the use of long measurement leads without sacrificing accuracy. All the measurements are made very accurately (See System Specifications).
The system is computer controlled and fully automated for all the measurements. It requires no manual intervention when operating in the Auto Mode.
The components used in the AWRMS™ 50 are of the highest quality, and designed and manufactured for a rugged environment.
The AWRMS™ 50 Software provided with the system is written in LabVIEW™. The test results are output in a tabular format and an ASCII file for easy import to spreadsheets.
Addition to the innovative technology, the AWRMS™ 50’s speed and accuracy account for the increased interest and preferred status among many well known transformer and reactor manufactures.
State of the art technology that will meet today’s and future testing requirements.
Measurements on the primary and secondary of the three phase UUT are done simultaneously. Two power supplies (max: 60 Vdc & 50 A), handle even the largest PTs and saturates them within the shortest time. Auto tap changer control signal is available for PTs with OLTC.
A wide range of features specifically tailored for the testing of large PTs are accomplished through a 20 Channel Scanner Matrix (4-Wire). This ensures that all the temperature measurements are automated improving operator efficiency and eliminating human errors.
An intrinsically safe and heavy duty discharge circuit rapidly dissipates the stored magnetic energy in the UUT after each test. At that time, red warning indications come on the monitor. Over voltage protection is provided on all lines between the system and the UUT.
The AWRMS™ 50 is a multi-parameter rack system and costs lesser than other similar systems. Its automated operation improves measurement efficiency and reduces testing cost. The system, very much reduces the maintenance and unexpected shutdown costs.
System control and data acquisition and measurement hardware as well as charging and discharging circuits.
AWRMS™ 50 Software Features:
CALIBRATION & VERIFICATION
Items required for calibration are Standard Resistor models 9332/0.0001, 0.001, 0.01, and 0.1 Ω and Model 9331/10 Ω.
|0.1 % (1 μΩ to 1.2 Ω at full current)
(up to 500 Ω at reduce current)
|Power Supplies||2 × 3 kW|
|Max. Test Voltage / Current||60 Vdc/50 A (Continuously Variable)|
|Settling Time||≤ 40 Sec. (Typical)|
|Ratio Measurement (Range & Accuracy)||Ratio 1 to 10,000 ± 0.2 % (other Ratios are available)|
|Test Voltage / Current||48, 60, & 100 Vac/Limited: 2 A|
|Vector Group Detection||0 to 330° (0, 30, 60 … 330) ± 15°|
|Temperature Measurement||-100° to 400 °C ± 0.3 °C
(RTDs: PT100-Standard Compatible)
|Measurement Cycle Time||Selectable from Seconds to Minutes|
|Ambient Temperature (Operating)||0° to 45 °C|
|Relative Humidity (Operating)||20 to 60 %|
|Mains Supply||240 Vac (5-Pin) 18.4 kVA 50/60 Hz|
|Ambient Temperature (Reference)||15° to 35 °C|
|Relative Humidity (Reference)||30 to 85 % (non-condensing)|
|Size (D × W × H)||800 × 600 × 1513 mm (31.5 × 23.6 × 59.6 in)
(H: Excludes warning light & castor)
|Weight||220 kg (485 lbs), Cables 45 kg (99 lbs)|
|Warranty||1 Year (Parts & Labour)|