Power System Analyzers
- Models 931A/930A/929AModels 931A/930A/929A Power System Analyzers. The Arbiter Systems®, Inc. Models 931A/930A/929A Power System Analyzers, revolutionary new tools for the power engineer, use state-of-the-art PowerDSA™ Digital Signal Analysis to make more measurements, more accurately, more easily and at a lower price than ever before. See why the Model 931A/930A/929A Power System Analyzers are revolutionizing measurements of instrumentation, relaying and metering circuits.
- Grounding the Model 931A Power System Analyzer:
- Operating the 931A Power System Analyzer without connecting to a safety ground is an unsafe practice. The chassis is galvanically isolated for the Voltage and current inputs. However, due to capacitive coupling the chassis will float to the average value of the voltage inputs when not properly grounded. This means if the A, B, and C Voltage inputs have a potential of 750 Volts with respect to the neutral input the chassis could float to over 400 Volts rms. The available current is very minimal so this potential is no where near lethal. A well-grounded person may feel a tingle when touching metal chassis parts.
- 931A's have two safety ground connections, a binding post and the third wire of the IEC power inlet. Both are directly connected to the chassis. They are isolated from all inputs, the RS232 connector and the internal signal ground. One of these safety grounds should be connected to a low impedance earth ground. This is especially true when measuring high Voltage.
- Connecting the safety ground after the chassis has floated to a high potential will result in a large EMI spike. The LCD display is sensitive to this EMI spike and may go blank. If this occurs, press the power key to turn off the instrument. Connect the safety ground and turn the instrument back on.
- Model 09311AModel 09311A: 400A Auxiliary Current Transformer. The Arbiter Systems®, Inc. Model 09311A 20:1 Auxiliary Current Transformer extends the outstanding accuracy, features, and performance of the Model 931A Power System Analyzer up to 400 amperes input capability. Due to the careful design of the Model 09311A Auxiliary CT, overall accuracy exceeds 0.1% of reading and 0.1 degrees over the entire input current range of 1 to 400 amperes rms.
- Model 928AModel 928A Power System Multimeter. The Arbiter Systems®, Inc. Model 928A Power System Multimeter with Floating-Point DSP,TM Digital Signal Analysis is an AC Power measurement instrument, providing outstanding performance and flexibility in a small, hand-held package. The Model 928A measures basic data and power quantities, power quality including harmonics, flicker, sags, surges and interruptions.
Model 928A Software and Firmware
- 928UserCtProg.exe [928UserCtProg.exe~3.4 MB]
- 928UserCtProg.exe is a utility that allows you to modify or create CT characterization files for the 928A.
Panel Meter Calibrators
- Models 1040C/1040CUModel 1040C/1040CU Panel Meter Calibrators. The Model 1040C Panel Meter Calibrator (PMC) integrates into one compact, portable package eight calibration functions: voltage, current, frequency, power factor, phase, VARs, and synchroscope. With all of these functions in one lightweight yet rugged instrument, you can easily calibrate virtually every type of panel meter and many types of transducers and overcurrent relays. A hand-held control unit is also provided, so you can operate the Model 1040C at a distance when calibrating panel meters is restricted locations in the control room or substation. The lower-priced Model 1040CU offers all of the same performance and features as the 1040C, but it has binding post outputs instead of detachable output cables, and it has no hand-held control unit. There is also no storage compartment in the unit's lid, and the maintenance manual is optional. For applications which do not require these features, the Model 1040CU offers significant savings.
- White Paper: [PDF~270.4 kB] Calibrating Meters and Transducers with the Model 1040C Panel Meter Calibrator
Transformer Maintenance
- Model 921AModel 921A Combustible Gas Meter. The Model 921A Combustible Gas Meter is a rugged, portable instrument which measures total combustible gasses (TCG) in oil-filled transformer nitrogen gas blankets. TCG measurements have been shown to be good indicators of transformer health. See, for example, IEEEC57.104,"Guide for the Detection and Determination of Generated Gases in Oil-Immersed Transformers and their Relation to the Serviceability of Equipment," IEEE Fluids Subcommittee, Transformers Committee, Power Engineering Society, 1988.
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Calibration Gas Material Safety Data Sheets (MSDS)
- AS0019500 Instrument Air. See the MSDS in PDF format [PDF~140.3 kB]
- AS0019600 Zero Nitrogen. See the MSDS in PDF format [PDF~130.5 kB]
- AS0019700 1% Methane in Nitrogen. See the MSDS in PDF format [PDF~136.0 kB]
