Model 930A Three Phase Power Analyzer - DISCONTINUED

An economic alternative to Model 931A. Featuring the same ac accuracy as the 931A, serial communication for power quality trend monitoring, and complete diagnostic capabilities.

Model 929A/930A Manual
Download PDF(2 MB) »

Model 929A/930A/931A Data Sheet
Download PDF(1 MB) »

Model 929A/930A/931A Data Sheet Español
Download PDF(188 kB) »

The Arbiter Systems^®, Inc. Model 930A Three Phase Power Analyzer is an economical alternative to the Model 931A Power System Analyzer when the dc voltage measurement, transducer calibration and timer features are not required. The Model 930A has the same ac accuracy as the Model 931A with PowerDSA^™ Digital Signal Analysis. Basic accuracy of 0.05 % of reading and 0.05 ° phase, harmonic analysis, and full three-phase capability are standard.

The Model 930A includes serial communication capability. Combined with the available application software and a laptop computer, is a valuable tool for use in power quality trend monitoring, as well as being a complete diagnostic tool for use in the substation and industrial power environment.

Model 930A measures all of the basic quantities: true-rms voltage and current, frequency and phase angle, as well as power quantities such as watts (W), watthours (Wh), volt-amperes (VA), volt-ampere hours (VAh), volt-amperes reactive (VAR), volt-amperes reactive hours (VARh), and power factor (PF), all with 0.11 % basic accuracy.

Measure harmonics and view the results graphically on the high contrast 240x64 graphic display. The two channels are normalized to Channel 1 fundamental phase, so you can see, for example, the relationship between current waveform distortions and voltage phase.

The 930A include a full three-phase input section, for automated three-phase measurement sequences, complete with multiple display modes (see Key Features tab, below)

Key Features
Specs
Options
Accessories
Software
Firmware
Related Resources

Same high accuracy as Model 930A
Features PowerDSA^™ Digital Signal Analysis
Complete diagnostic functions for use in substation and industrial power environments
Serial Communications supports power quality trend monitoring with included software
Field ready
Multiple display options including three phase displays
Basic three-phase display - Voltage, current, phase, frequency and power quantities on one convenient display.

Vector display - view voltages, currents and phase angles with their vector representation.
Voltage/Current Sequence display - view voltage, current and phase along with positive, negative and zero sequence values.
Energy display - view voltage, current, phase, frequency and energy quantities on one convenient display.

Input

Basic Inputs	Supports two main measurement channels, Channel 1 and Channel 2. Any voltage or current input signal may be selected for either channel. For basic measurements (voltage, current, frequency, phase angle) any combination of inputs may be used. For power and energy measurements (active power, apparent power, reactive power and power factor), one voltage and one current must be selected. For three-phase measurements, the input configuration is selected automatically, based on the measurement type (for example, 3-phase 4-wire 3-element).

Voltage

Input Range	1.5 Vrms to 750 Vrms (underrange to 200 mV)
Inputs	Four; A, B, C, N Phase-to-Phase Phase-to-Neutral Phase-to-Synthesized Neutral (A+B+C / 3)
Impedance	1 megohm
Leakage	< 3.5 mA per IEC348 and UL1244

Current

Input Range	0.04 Arms to 20 Arms (underrange to < 1 mA)
Inputs	Three; A, B, C, plus synthesized neutral
Burden	0.01 ohm maximum
Isolation	Transformer, 1000 Vrms
Neutral	Synthesized, -(A+B+C)

Timer

(Model 931A Only)

Transducer

(Model 931A Only)

Measurements

Voltage and Current

Method	Wideband: True rms, 3 kHz Bandwidth Narrowband: Fundamental magnitude
Accuracy	0.05 % of reading
Underrange	< 1 % of reading, typical at 0.3 mArms
DC Voltage	(Model 931A Only)

Phase Angle

Input	Channel 1 to Channel 2
A-B Range	0 ° to 360 ° or ± 180 °
A-B Accuracy	0.05 °
Underrange	< 1 °, typical at 0.3 mArms

Frequency

Input	Channel 1
Range	20 Hz to 500 Hz (underrange to 5 Hz)
Accuracy	0.005 % of reading

Harmonics

Input	Channel 1 or Channel 2
Range	2nd to 50th Harmonic (50 Hz or 60 Hz fundamental)
Accuracy	0.01 % THD + 5 % of reading
Display	THD; K-factor; Amplitude bar graph; and individual harmonic magnitude and phase (simultaneous)

Waveform Display

Channel 1 and/or Channel 2

Power

Range	0 MVA or MVAh to 99999 MVA or MVAh ± 99999 MVAR or MVARh ± 99999 MW or MWh ± 1.0000 PF, lead or lag
Accuracy	0.11 % of VA, for VA, VAR, and W 0.001 PF

Timer

(Model 931A Only)

Transducer Accuracy

(Model 931A Only)

Interface

Operator

Display	240x64 graphic LCD with cold-cathode fluorescent lamp (CCFL) backlight
Keypad	21 function keys plus On/Off
Memory	EEPROM (calibration data) Battery backup RAM (setup and stored results) Real-time clock
Data	Instrument calibration data User setups (up to six) Logged data (15 to 200); time-tagged

System Interface

RS-232	1200 baud to 115,200 baud; 7 or 8 data bits; 1 or 2 stop bits; even/odd/no parity
Isolation	Optical, 300 Vrms

Power Requirements

Internal Battery

Type	Sealed lead-acid
Operation	8 hours typical
Charging Time	8 hours typical; fast + float charge

General

Physical

Instrument/Size	205 mm x 305 mm x 225 mm (8 in x 12 in x 8.75 in) 483 mm x 483 mm x 483 mm (16 in x 16 in x 16 in), shipping
Weight	5.8 kg (12.8 lbs), net 8.2 kg (18 lbs), shipping

Environmental

Temperature	Operating: - 10 °C to + 50 °C Nonoperating: - 40 °C to + 75 °C
Humidity	Noncondensing

There are no additional Options available for this product.

Included
812	Safety Ground Lead
AS0094100	Operation Manual (929/930)
CA0019806	RS-232 Null Modem Cable, DB9F-DB9F, 2 m (6 ft) length
P09R	Power Cord, North America, Right Angle
Available
09311A	400 A 20:1 Precision CT, 0.1 % Accuracy
811AT-8	3-Phase Univ. Test Plug Current Lead Set
813AT-8	3-Phase Safety Voltage Lead Set
815AT-8	Model 815 Fused Safety Voltage Probe Lead Set
816AT-8	3-Phase Spade-Lug Current Lead Set
817AA-8	1-Phase Clamp-On CT Test Lead
817AT-8	3-Phase Clamp-On CT Lead Set
818AT-8	3-Phase Safety C-Hook Current Lead Set
819xyz-8	Modified Safety Clip Lead Set
841A	Series Test Jack Isolator Paddle
842A	Three - Series Test Jack Isolator Paddles with 60 cm Nylon Cord
842B	Four - Series Test Jack Isolator Paddles with 60 cm Nylon Cord
AP0001300	1000:1 Clamp-on CT, 1000 A (Current Output)
AP0012800	1000:1 Clamp-on CT, 200 A, 1 mA/A (100 mA @ 100 A ac)
AP0012900	250:5, 500:5, 1000:5, 1000 A rms, Clamp-on CT
AS0035901	Adjustable Tilt Handle/Bail Assembly
AS0036000	400 A CT Bracket (each)
AS0060000 ¹	PowerCSV Application Software for Models 931A and 930A
AS0079001	Universal Test Plug Current Shunt, A Phase Red
AS0079002	Universal Test Plug Current Shunt, B Phase Yellow
AS0079003	Universal Test Plug Current Shunt, C Phase Blue
AS0079030	Universal Test Plug Current Shunt, Set of Three
CN0030500	Adaptor Banana Shielded - Red
CN0030501	Adaptor Banana Shielded - Black
P01R-P10R	Country specific power cord with right angle female end

¹ Available via download only

Click to Download Latest Version of Software
930/31_PowerCSV_14Oct2010_2002	For Models 930 and 931 - requires memory option
930/31_PowerCSV_SHA256_14Oct2010_2002	930/31_PowerCSV SHA256 checksum
Tera Term_01Jan2010_23	This is a very good HyperTerminal replacement. Able to capture data from Models 930A and 931A. Also able to program the GPS Satellite Controlled Clocks via serial commands.
Tera Term SHA256_01Jan2010_23	Tera Term SHA256 checksum

Software Version and Related Information

Common Controls Update for PowerCSV

04Oct2002

Current

PowerCSV for Models 930 and 931 (930/31_PowerCSV)

Version	Rev Level	Version Notes
14Oct2010	2.002	Fixes downloading of Standard Data Log issue Increments version to 2.002 Updates copyright 2010 Uses new Installer to ensure consistency across Arbiter product installers
28Apr2009	2.001	Current release

930/31_PowerCSV_SHA256

Version	Rev Level	Version Notes
14Oct2010	2.002

Terminal Emulation Program (Tera Term)

Free software terminal emulator (communications program) for Microsoft Windows.

Tera Term (Pro) is a free software terminal emulator (communication program) for MS-Windows.
Supports VT100 emulation, telnet connection, serial port connection, etc.
Compatible with Windows 98, Windows NT, Windows 2000, Windows XP, Vista, Windows 7

Tera Term SHA256

Firmware Information (EPROM based firmware is not available for download)
929/30/31_Firmware_05Dec2018	Requires an EPROM update from Arbiter. The same update works for Models 929, 930 and 931.

Firmware Version and Related Information

EPROM update (929/30/31_Firmware)

Version	Rev Level	Version Notes
05Dec2018		Updates are not security related. Fixed word wrap on display when prompted to set defaults (BZ 841).
13Jul2018		Updates are not security related. Added check of battery backed RAM data. If corrupted then prompts to set defaults. Set default backlight control to AUTO. Added support for NiMH battery.
08Dec2010		Fixed: CT/PT scale factors were enabled upon setting factory defaults. (Reference BZ642)
10Feb2010		Problems erasing single log file. (BZ 599) Update RS232 output to replace Null (0x00) bytes with space (0x20)

App Note 110: Measuring Low-Level Signals w/Model 931A
Download application_note_110.pdf (25 kB) »

App Note 113: Using Clamp-On Current Transfomers (CTs) with Arbiter Power Analyzers
Download application_note_113.pdf (89 kB) »

Logging Files from the Model 931A Power System Analyzer
Download pd0044600_logging_931_930_data_with_teraterm.pdf (142 kB) »

Model 09311A 400 Amp Auxiliary Current Transformer
Download 09311a.pdf (252 kB) »

Model 09311A 400 Amp Auxiliary Current Transformer Español
Download 09311a_ct_espanol.pdf (125 kB) »

Overview Presentation of Model 931A Power System Analyzer
Download 931a_seminar.pdf (732 kB) »

Sealed Nickel-Metal Hydride cells (MSDS)
Download sealed_nickel-metal_hydride.pdf (558 kB) »