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AMETEK-Ls-Lx Series

sku Product SKU:  AME-Ls-Lx S

The Ls/Lx Series is a completely improved new product based on the popular California Instruments L Series. Both the Ls and Lx feature many basic AC Source capabilities at a very reasonable price. For more information on either product, please click on the product tab on the right.

Ls Series 
The Ls Series is an improved version of the classic California Instruments L Series AC power sources. It provides many basic AC source capabilities at an economical cost. Additional capabilities such as arbitrary waveform generation and harmonic measurements can be added as options. The Ls Series can be ordered in either single phase (-1) or three phase (-3) configurations. Power levels range from 3 kVA to 6 kVA in a single chassis. Multiple chassis can be combined for power levels up to 18 kVA. The Ls Series is completely microprocessor controlled and can be operated from a simple front panel keypad. A pair of analog controls located next to the backlit alphanumeric LCD display allows output voltage and frequency to be slewed up or down dynamically. For more advanced operations, a series of menus is provided using a dual line high contrast LCD display. The Lx Series represents a modern AC power source that addresses increasing demands on test equipment to perform more functions at a lower cost. By combining a flexible AC power source with a high-end harmonic power analyzer, the Lx Series systems are capable of handling applications that would traditionally have required multiple instruments.

Lx Series
The Lx Series is completely microprocessor controlled and can be operated from a simple front panel keypad. A pair of analog controls located next to the backlit alphanumeric LCD display allows output voltage and frequency to be slewed up or down dynamically. With precise output regulation and accuracy, high load drive current, multi or single phase mode and built-in power analyzer measurement capabilities, Lx Series AC source/analyzers address many application areas for AC power testing. Additional features, like line arbitrary waveform generation and available DO 160 or MIL 704 test standards, make the Lx Series a good choice for avionics or defense applications. All Lx Series AC sources are equipped with IEEE-488 (GPIB) and RS232C remote control interfaces and support SCPI command language programming.

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AMETEK-CSW Series

sku Product SKU:  AME-CSW S

The CSW Series represents a new generation of AC/DC power sources that address the increasing demands on test equipment to perform additional functions at a lower cost. By combining a flexible AC/DC power source with a high performance power analyzer, the Compact CSW Series is capable of handling complex applications that have traditionally required multiple systems. The sleek integrated approach of the CSW avoids cable clutter that is commonly found in test systems. All connections are made internally and the need for digital multimeters, power harmonics analyzers, and current shunts or clamps is eliminated.

Since many components in the CSW are shared between the AC/DC source and the power analyzer, the total cost of the integrated system is less than the typical cost of a multiple unit system.

Easy to use controls 
The CSW Series is DSP controlled and can be operated from an easy to use front panel keypad. Functions are grouped logically and are directly accessible from the keypad. This eliminates the need to search through various levels of menus and/or soft keys. A large analog control knob can be used to quickly slew output parameters. This knob is controlled by a dynamic rate change algorithm that combines the benefits of precise control over small parameter changes with quick sweeps through the entire range.

AC, DC or AC+DC Output 
A direct coupled, transformerless design allows AC and DC on separate phases or on the same phase. The CSW can be used as a true DC power supply. High DC content waveforms (up to 312 volts) can be created with no derating of output power, even with 100% reactive loads, eliminating the need for a separate DC supply. Waveform programming is easily accomplished using the Graphical Users Interface software. Waveforms can be uploaded and modified from a digital scope. The waveforms can then be downloaded to the CSW and output to precisely simulate real-world conditions.

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Ametek MX Series

sku Product SKU:  AME-MX S

The MX Series consists of multiple high power AC and DC power systems that provide controlled AC and DC output for ATE and product test applications.

This high power AC and DC test system covers a wide spectrum of AC and DC power applications at an affordable cost. Using state-of-the-art PWM switching techniques, the MX series combines compactness, robustness and functionality in a compact floor-standing chassis, no larger than a typical office copying machine. This higher
power density has been accomplished without the need to resort to elaborate cooling schemes or additional installation wiring. Simply roll the MX15, MX30, or MX45 unit to its designated location (using included casters), plug it in, and the MX series is ready to work for you.

Simple Operation
The MX Series can be operated completely from its menu driven front panel controller. A backlit LCD display shows menus, setup data, and read-back measurements. IEEE-488, RS232C, USB and LAN remote control interfaces and
instrument drivers for popular ATE programming environments are available. This allows the MX Series to be easily integrated into an automated test system.

For advanced test applications, the programmable controller version offers full arbitrary waveform generation, time and frequency domain measurements, and voltage and current waveform capture.

Configurations
The MX15 delivers up to 15 kVA of single phase output. The MX30 delivers up to 30 kVA, and the MX45 up to 45 kVA. Both operate using single or three phase output in AC mode. In DC mode, 50% of the AC power level is available. On MX-P models, AC+DC mode is also supported.

For higher power requirements, the MX90 and MX135 models are available. Multi cabinet MX45 systems always operate in three phase output mode. Available reconfigurable MX90 and MX135 models (-MB designation) provide
multiple controllers which allow separation of the high power system into two or three individual MX45 units for use in separate applications. This ability to reconfigure the system provides an even greater level of flexibility not commonly found in power systems.

Product Evaluation and Test
Increasingly, manufacturers of high power equipment and appliances are required to fully evaluate and test their products over a wide range of input line conditions. The built-in output transient generation and read-back measurement capability of the MX Series offers the convenience of a powerful, and easy to use, integrated test

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Ametek RS Series

sku Product SKU:  AME-RS S

The RS Series consists of multiple high power AC and DC power systems that provide controlled AC and DC output for ATE and product test applications.

This high power AC and DC test system covers a wide spectrum of AC and DC power applications at an affordable cost. Using state-of-the-art PWM switching techniques, the RS series combines compactness, robustness and functionality in a compact floor-standing chassis, no larger than a typical office copying machine. This higher power density has been accomplished without the need to resort to elaborate cooling schemes or additional installation wiring. Simply roll the RS unit to its designated location (using included casters), plug it in, and the RS series is ready to work for you.

Simple Operation

The RS Series can be operated completely from its menu driven front panel controller. A backlit LCD display shows menus, setup data, and read-back measurements. IEEE-488, RS232C, USB and LAN remote control interfaces and instrument drivers for popular ATE programming environments are available. This allows the RS Series to be easily integrated into an automated test system. For advanced test applications, the programmable controller version offers full arbitrary waveform generation, time and frequency domain measurements, and voltage and current waveform capture.

Configurations 

The RS90 delivers output up to 90kVA in AC mode and 65% of rated power in DC and AC+DC mode.

For higher power requirements, the RS180, RS270, RS360, RS450 and RS540 models are available. Available reconfigurable RS models (-MB designation) provide multiple controllers which allow separation of the high power system into up to six individual RS90 units for use in separate applications. This ability to reconfigure the system provides an even greater level of flexibility not commonly found in power systems.

Product Evaluation and Test

Increasingly, manufacturers of high power equipment and appliances are required to fully evaluate and test their products over a wide range of input line conditions. The built-in output transient generation and read-back measurement capability of the RS Series offers the convenience of a powerful, and easy to use, integrated test system.

Regenerative, bidirectional “Green” Power Solution

The RS Series features the ability to both source and sink current, i.e. bi-directional current flow. The RS amplifier is designed to reverse the phase relationship between the AC input



Programming sink (-SNK) mode operation.

 

Avionics
With an output frequency range to 819 Hz (or 905 Hz with -HF option), the RS Series is well suited for aerospace applications. Precise frequency control and accurate load regulation are key requirements in these applications. The available IEEE-488 remote control interface and SCPI command language provide for easy integration into existing ATE systems. The RS Series eliminates the need for several additional pieces of test equipment, saving cost and space. Instrument drivers for popular programming environments such as National Instruments LabView™ are available to speed up system integration.

Regulatory Testing
As governments are moving to enforce product quality standards, regulatory compliance testing is becoming a requirement for a growing number of manufacturers. The RS Series is designed to meet AC source requirements for use in compliance testing such as IEC 61000, 3-2, 3-3, 3-11, 3-12, to name a few.

Choice of voltage ranges
The RS Series includeds 150V and 300V line to neutral. These models provide 3 phase output capability of 260 Vac or 520 Vac line to line respectively. 
For applications requiring more than 300 V L-N (or 520 V L-L), the optional -HV output transformer provides an additional 400 V L-N and 693 V L-L output range for use in AC mode only.

High Crest Factor
With a crest factor of up to 3.6, the RS Series AC source can drive difficult nonlinear loads with ease. Since many modern products use switching power supplies, they have a tendency to pull high repetitive peak currents. The RS90 can deliver up to 720 Amps of repetitive peak current (150 V AC range) per phase to handle high crest factor three phase loads.

Remote Control
Standard RS232C & USB IEEE-488 along with optional LAN remote control interfaces allow programming of all instrument functions from an external computer. The popular SCPI command protocol is used for programming. 

Application Software
Windows® application software is included. This software provides easy access to the power source's capabilities without the need to develop any custom code. The following functions are available through this GUI program:
• Steady state output control (all parameters)
• Create, run, save, reload and print transient programs
• Generate and save harmonic waveforms. 
• Generate and save arbitrary waveforms. 
• Measure and log standard measurements
• Capture and display output voltage and current waveforms. 
• Measure, display, print and log harmonic voltage and current measurements.
• Display IEEE-488, RS232C, USB and LAN bus traffic to and from the AC Source to help you develop your own test programs.
1. Requires PC running WindowsXP™ or Windows 2000™ / 2007.

Harmonic Waveform Generation 
Using the latest DSP technology, the RS Series programmable controller is capable of generating harmonic waveforms to test for harmonics susceptibility. The Windows Graphical User Interface program can be used to define harmonic waveforms by specifying amplitude and phase for up to 50 harmonics. The waveform data points are generated and downloaded by the GUI to the AC source through the remote interface. Up to 200 waveforms can be stored in nonvolatile memory and given a user defined name for easy recall.

All RS Series configurations offer three phase waveform generation, allowing independent phase anomalies to be programmed. It also allows simulation of unbalanced harmonic line conditions.

Arbitrary Waveform Generation
Using the provided GUI program or custom software, the user also has the ability to define arbitrary AC waveforms. The arbitrary waveform method of data entry provides an alternative method of specifying AC anomalies by providing specific waveform data points. The GUI program provides a catalog of custom waveforms and also allows real-world waveforms captured on a digital oscilloscope to be downloaded to one of the many AC source's waveform memories. Arbitrary waveform capability is a flexible way of simulating the effect of real-world AC power line conditions on a unit under test in both engineering and production environments.

RS Series - AC and DC Transient Generation
The RS Series controller has a powerful AC and DC transient generation system that allows complex sequences of voltage, frequency and waveshapes to be generated. This further enhances the RS's capability to simulate AC line conditions or DC disturbances. When combined with the multiphase arbitrary waveform capabilities, the AC and DC output possibilities are truly exceptional. Transient generation is controlled independently yet time synchronized on all three phases. Accurate phase angle control and synchronized transient list execution provide unparalleled accuracy in positioning AC output events.

Transient programming is easily accomplished from the front panel where clearly laid out menu's guide the user through the transient definition process.

RS Series - Measurement and Analysis
The RS Series is much more than a programmable AC, DC or AC+DC power source. It also incorporates an advanced digital signal processor based data acquisition system that continuously monitors all AC source and load parameters. This data acquisition system forms the basis for all measurement and analysis functions. These functions are accessible from the front panel and the remote control interface for the RS Series.

Conventional Measurements [All controllers]
Common AC and DC measurement parameters are automatically provided by the data acquisition system. These values are displayed in numeric form on the front panel LCD display. The following measurements are available: Frequency, Vrms, Irms, Ipk, Crest Factor, Real Power (Watts), Apparent Power (VA) and Power Factor.

Harmonic Analysis
The RS Series provides detailed amplitude and phase information on up to 50 harmonics of the fundamental voltage and current (up to 16 kHz). Harmonic content can be displayed in both tabular and graphical formats on the front panel LCD for immediate feedback to the operator. Alternatively, the included GUI program can be used to display, print and save harmonic measurement data. Total harmonic distortion of both voltage and current is calculated from the harmonic data.

Waveform Acquisition
The measurement system is based on real-time digitization of the voltage and current waveforms using a 4K deep sample buffer. This time domain information provides detailed information on both voltage and current waveshapes. Waveform acquisitions can be triggered at a specific phase angle or from a transient program to allow precise positioning of the captured waveform with respect to the AC source output. The front panel LCD displays captured waveforms with cursor readouts. The included GUI program also allows acquired waveform data to be displayed, printed, and saved to disk.

 

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Ametek Compliance Test System

sku Product SKU:  AME-Compliance Test System

The CTS Series is a complete, turn-key compliance test system for EN IEC 1000-3-2 (Harmonics) Including A14, EN IEC 1000-3-3 (Flicker) and various EN IEC 1000-4 AC immunity tests. Consisting of an AC power source, a power analysis conditioning system (PACS) and a PC based data acquisition system, the CTS provides a complete turn-key solution for IEC testing. The Windows™ based CTS software performs the IEC tests and generates detailed test reports. Comprehensive data files are stored on disk to allow post test analysis.

The CTS system implements various IEC standards including the new Amendment 14 and provides a software only upgrade path for future standard changes.

A European style AC outlet is provided on the front panel or rear panel for easy connection of single phase loads. Three phase loads are connected using rear terminal blocks.

Covered EN IEC Standards The following tests can be performed using an iX Series based CTS system:
EN 61000-3-2 Harmonics (A14)
EN 61000-3-3 Flicker
EN 61000-4-11 Voltage Dips and Interruptions (EOS Option - ED2.0)
EN 61000-4-13 Harmonics and Inter-harmonics (requires option -413)
EN 6100-4-17 DC Ripple
EN 61000-4-14 Voltage Fluctuations
EN 61000-4-28 Frequency Variations
EN 61000-4-29 DC Dips and Interruptions (Pre-compliance)

EN 61000-3-2 Harmonics 
Full compliance testing for current harmonics emissions of class A, B, C and D products is supported. Support for both the 1998 and 2001 version (Amendment 14) of the Harmonics standard is built-in for full compliance with both harmonics standards.

EN 61000-3-3 Flicker 
Flicker PST & PLT results are displayed in realtime during the entire test. No need to wait until the entire test is completed to know if the EUT passed or failed. Both programmable and lumped reference impedance methods are available for flicker testing.

EN 61000-4-11 Voltage Dips - ED2.0
Pre-compliance Voltage Dips and Interruptions are available on most CTS systems. For full compliance solutions, the Electronic Output
Switch (option -EOS1 or -EOS3) may be added to any iX based CTS systems.

EN 61000-4-13 Interharmonics
Testing to the EN 61000-4-13 Interharmonics standard is supported on all iX Series based CTS systems by adding the -413 option.

Other EN 61000-4 Immunity Tests
Additional immunity test standards are supported on all iX based CTS Systems.
Configurations The CTS system is available in both single phase and three phase configurations. Single phase configurations range in power from 1250 VA to 5000 VA.

Three phase configurations offer 15 k VA or 18.5 A per phase at 230 V. Single phase 5001iX-CTS systems can be upgraded to three phase systems if needed.

Measurement only CTS system versions (100- CTS and 300-CTS) can be added to an existing California Instruments power source.

  • Complete Test Solutions
    Complete test solutions for emissions and immunity compliance testing of AC and DC powered products
     
  • Single & Three Phase Operation
    Offers flexibility
     
  • Direct PC Bus Access
    Provides high sampling rate and resolution for accurate measurements and high speed data transfers
     
  • PC based harmonic & flicker testing
    provides real-time full color data display updates and continuous PASS/FAIL monitoring.
     
  • Supports Global Standards
    Supports European and Japanese standards
     
  • Easy To Use Interface
    Provides IEC test setup, data analysis, display, MS Word test reports, and data files are generated in MS Excel format
     
  • High resolution
    Data storage to disk in for post-acquisition analysis and reporting
     
  • Single Step
    Single Step and Fast Forward replay of recorded test data at 200 mSec

AC Power Source
Available in a choice of power levels ranging from 1250 VA to > 45,000 VA, the CTS Systems covers the complete range of single and three phase products that require testing to conform with existing and pending IEC standards. All iX Series AC sources meet IEC requirements for low voltage distortion and offer arbitrary waveform generation, precision measurements, and waveform analysis capabilities. Actual
AC Source voltage distortion is measured in real-time during the harmonics test and any distortion that could affect the test results is clearly indicated.

All iX Series based CTS systems support full compliance testing for several IEC 61000-4 AC immunity standards as well (certain options may be required, see ordering information for details).

Direct PC Data Acquisition
A high-speed digital signal processor based data acquisition system is used to implement the required IEC compliance measurement system. Direct access to the PC bus ensures a much higher data throughput capability than typically found in single box IEC test systems that use either the IEEE-488 instrumentation, USB, LXI or RS-232 bus to communicate between the analysis instrument and the PC.

This high-speed acquisition system architecture stores raw data to the hard drive and offers several features. It not only possesses the ability to support future versions of test standards by merely installing new PC software but it also greatly reduces the risk of product obscolescence as test standards evolve. Furthermore, since the data is streamed to hard disk in real-time, a complete data record is created each time which may be used for audit purposes, data replay and further analysis or to prove compliance to all the measurement requirements specified in the test standard.

A special signal conditioning and isolation unit is used to provide quick and easy connection between the AC source output and the Equipment Under Test. This unit provides the required isolation, signal conditioning and anti-alias filtering for the measurement system. The equipment under test can be plugged in the front panel mounted European style outlet (single phase systems only), or wired to a rear panel mounted terminal block.

Harmonics Analyzer
A key part of the CTS system is the IEC compliant power analyzer which provides detailed information on both voltage and current. Measurements of both harmonics and interharmonics are made in real-time with no measurement gaps to fully conform to the latest revision of the IEC 61000-4-7 test standard. AC source voltage and EUT power are
monitored continuously during the entire test. Voltage distortion and current harmonic data is checked against IEC class limits for pass or fail detection. Comprehensive test reports can be generated easily.

Test limits are retained in a password protected database and can be updated if needed in the future without the need to change software. Other software changes as a result of changing IEC harmonics standard can be accomplished by simply installing new PC software. No harmonics testing software resides in system firmware which would require more costly field upgrades.

Flicker Reference Impedance
An IEC61000-4-15 compliant flicker meter is an integral part of the CTS software. The required IEC 60725 compliant reference impedance is implemented in the iX Series AC Source using programmable output impedance. Programmable impedance offers improved accuracy compared to a lumped reference impedance and the ability to support different national standards without the need to switch out lumped reference impedance hardware. A good example is testing for compliance with the Japanese harmonics and flicker standard, which requires different impedance values to be programmed as compared to the European test standard.

Optionally, a lumped impedance compliant with IEC 60725 or the Z-test specification of IEC61000-3-3 can be ordered for single or three phase iX Series based CTS systems. For three phase CTS systems, a lumped impedance option is recommended. The software can be configured to use either impedance type during flicker testing.

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Ametek MX Compliance Test System

sku Product SKU:  AME-MX Compliance Test System

A growing number of electronic products manufactured today have to meet international regulatory requirements for emissions and immunity. This is particularly true for products sold in the European community as well as a growing list of countries in the Far East. The California Instruments MXCTS System provides a cost-effective test solution aimed at verifying higher power product compliance to a number of AC and DC related harmonized test standards.

The MXCTS system offers many of the same features and capabilities of the California Instruments CTS Series product line already in use at many EMC labs around the world.

Compliance Testing to:
· EN / IEC 61000-3-12 (-CTSH, -CTSHL) 
Harmonics, < 75 Arms/phase
· EN / IEC 61000-3-11 (-CTSH, -CTSHL) 
Flicker Measurement, < 75 Arms/phase
· EN / IEC 61000-3-2 (-CTSL, -CTSHL) 
Harmonics - Including Am 14, < 16 Arms/Phase
· EN / IEC 61000-3-3 (-CTSL, -CTSHL) 
Flicker Measurement, < 16 Arms/phase
· EN / IEC 61000-4-13 
(option) Harmonics & Interharmonics Immunity (option)
· EN / IEC 61000-4-14 AC Voltage Fluctuations
· EN / IEC 61000-4-17 DC Ripple
· EN / IEC 61000-4-28 Frequency Variations

Pre-compliance Testing to:
· EN / IEC 61000-4-11 (option) AC Voltage Dips and Variations (option)
· EN / IEC 61000-4-27 Three phase AC Voltage Unbalance
· EN / IEC 61000-4-29 DC Voltage Dips and Interruptions

NPL Certified Compliance The MXCTS System is based on the same technology deployed in the California Instruments CTS series products. The CTS series has been certified
by the National Physics Laboratory (NPL) in the United Kingdom for full compliance with the IEC Harmonics and Flicker standards. The NPL is an independent test laboratory and a recognized authority on AC calibration.

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Ametek Asterion AC S

sku Product SKU:  AME-Asterion AC S

Performance. Reliance. Brilliance.
Inspired by the enduring power of a brilliant star, the California Instruments "Asterion" line of AC power sources by AMETEK Programmable Power combines intelligence and flexibility to create an advanced platform of AC solutions. This easy-to-configure design features sophisticated technology for delivering high performance, programmable AC and DC power. Its sleek design packs maximum power density into a low-profile form factor with an intuitive touch screen interface placing that power at your fingertips. Centralized control and unparalleled modularity make Asterion the most adaptable platform on the market. Its groundbreaking capabilities set the standard for affordable, precision power sources.

iX2™ current doubling technology.
All Asterion sources employ AMETEK’s latest current enhancing technology, iX2™. The iX2 current doubling technology enables output current to increase linearly up to two times the full voltage current as the voltage decreases from range maximum to one-half of range voltage. iX2 technology results in a source that delivers full power over the widest voltage ranges. This eliminates the need to buy overpowered sources just to reach low line current requirements.

Control via Front Panel Touchscreen & Encoder or available digital control interfaces
The Asterion AC Series can be operated from the intuitive, easy to use front panel touchscreen or the Ethernet LXI, USB and RS232 standard control interfaces, as well as through the optional GPIB control interfaceThe touchscreen function group icons include a Dashboard, Output Programming Parameters, Measurements, Sequencing, Configuration, Control Interfaces, Applications, and System Settings. Function selection and parameter entry can be achieved either by direct selection from the touchscreen or by using the encoder selector button. The control resolution is adjusted by a dynamic rate change algorithm that combines the benefits of precise control over small parameter changes with quick sweeps through the entire range.

Applications
The Asterion AC Series is designed for testing today’s complex electronics, including avionics, telecommunications and commercial electronics requiring low profile, light weight power sources with high power density. 

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Ametek Power Special Test Equipment (PSTE)

sku Product SKU:  AME-Power, Special Test Equipment

The Elgar Power Special Test Equipment (PSTE) provides programmable DC power, and programmable loading, to the electrical systems of satellites for system functional testing.

There are several key benefits of the PSTE. First, it is a complete turnkey system that is capable of operating locally through a simple GUI interface or remotely via a host computer as a single Ethernet address. The spacecraft engineer who defines the spacecraft power bus limits, cabling scheme, mode simultaneity matrix, and system behavior based upon limit conditions implements the real intelligence of the system. From this definition, operating procedures can be generated to allow spacecraft technicians to operate the system, system protections are implemented that perform cable detection and mode verification, automated spacecraft fixture identification and related mode capability, and more.

Second, the PSTE is intended to negate the need for purchasing new power test equipment with each new spacecraft. With a review of current and future needs and industry trends, power resources can be sized to provide the optimal blend of flexibility and price.

The system also monitors and provides protection for the satellite electrical power systems against any damage by programming error or by system failure.

The following resources are available in the system pictured on the cover. In most cases, the hardware resources can be scaled to meet the customer's individual requirements.

AC Isolation transformers
• 75KVA power rating; Transform 480VAC 3phase Delta to 208VAC 3 phase Wye
Main Power Rack
• Five 10KW power channels; 150VDC at 67A each
• One 5KW load channel; 3-450V, 0-150A constant current
• Eight programmable strip chart recorder outputs
Solar Array Simulator
• 64 Channels with 110V Voc and 450W each
Electronic Load Rack
• Three 5KW load channel; 3-450V, 0-150A constant current
Remote User Interface
• Ruggedized Portable PC with operator interface software
System Verification test Fixture
• Customized for individual spacecraft I/O to allow convenient, manual verification of power setup.

Hardware Overview
In this section, the overall system is first represented by a simplified block diagram along with a general discussion of the function of each equipment rack. After which, each rack of equipment is represented by its own block diagram. Each rack block diagram is supported by a discussion of the equipment in the rack.

Either the Remote User Interface (RUI) or the Remote Operating System (ROS) is the source of control, or Computer in Charge (CIC), at any given time, at the operator's discretion. The ROS is supplied by the user. The CIC communicates directly with the system controller in the MPR (MPR controller), and the entire system is controlled via the MPR Controller.

Diagnostics and Troubleshooting can be accomplished directly from the MPR controller. The Main Power Rack (MPR) provides main bus power for tests from up to five internal power sources. The Solar Array Simulator (SAS) provides solar panel simulation power. The Spacecraft Protection Unit (SPU) further protects the spacecraft from damage in case of failure of the built-in OVP/OIP protection of the rest of the PSTE system. For electrical system loading tests, the Electronic Load Rack (ELR) provides three programmable Electronic Load Units (ELU). The MPR contains an ELU that can be used when only one ELU is required.

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Ametek DC Power/Energy Absorber

sku Product SKU:  AME-DC Power/Energy Absorber

The Energy Absorber Test System includes power supplies and a regenerative energy absorber with a rating of 400VDC at ±150A. The system consists of DC power supplies, an AC distribution and interlock system, an energy absorber chassis and an absorber load resistor chassis. The power sources are equipped with a remote control option allowing control via GPIB or with front panel controls in local mode. The operation of the specific parts of the system is described in the sections below.

DC Power Supplies
The power supplies consist of two model types each rated for 0-400VDC at 75A. The SGI supply includes a GPIB programming interface and operates as the Master supply. The SGA supply is used as a Slave, operating as a voltage controlled current source. This Master/Slave operation is used to provide up to 400V at 150A for 60kW of output power. By operating in a Master/Slave configuration, the supplies operate as one unit that can be controlled from the Master unit through either local control or IEEE-488 operation. 
The DC power supplies contain a provision for voltage and current readback. The current readback on the front panel of the supplies is set up so that the SGI supply indicates the sum of both supplies. As used in this system, the power supply current monitoring indicates the actual power supplies output current. Regenerative current is not conducted through the power supplies due to a blocking diode in the Energy Absorber chassis so the system current readback is available separately.

Energy Absorber Load Chassis
The Energy Absorber Load chassis contains the regenerative resistive load element. The load consists of numerous high power resistors connected in series/parallel banks, creating a total resistance of approximately 1.5 Ohms at 30kW continuous and 60kW peak.

Energy Absorber Control Chassis
The Energy Absorber Control chassis contains primary and secondary voltage clamps consisting of an IGBT and an SCR. In addition, it contains a GPIB programmer and measurement circuitry and controls that provide drive signals to the power components. In the chassis, high current bus capacitors are connected between the output to limit the rate of rise of voltage (slew rate) allowing the IGBT to operate at a controlled frequency when an external Regen current pulse occurs and to store energy to provide high peak current pulses to the load. A blocking diode in series with the input power supplies is used to detect the direction and amplitude of current flow. A differential amplifier is used to monitor the voltage across the blocking diode and regulate it to a value programmed by the internal GPIB controller which is independent of the input voltage level. Since it is desirable in some tests to allow the voltage to increase above the normal voltage level during the Regen pulse event, the output occurring across the blocking diode is scaled so that the voltage that is fed to a comparator is proportional to the controllers D-A converter that is calibrated to this same voltage range. When currents from the actuator conduct back into the absorber chassis, the bus capacitor charges until the input to the comparator reaches the programmed threshold and activates a drive signal to turn on the power IGBT connecting the absorber load resistor across the output bus. The resistor discharges the output capacitor until a lower threshold voltage is reached on the comparator. In this manner, with the actuator Regen current providing the charging current and the absorber load resistor providing the discharge current, the bus capacitor bank voltage can be maintained at a constant level with approximately 5V peak to peak of ripple during the charge and discharge intervals. The Energy Absorber Control chassis also contains circuitry to activate AC input contactors, relays and power supply shutdown signals, which are enabled through a control connector. Also available are high bandwidth 0-10V analog circuitry proportional to the DC output voltage and current for monitoring with an oscilloscope or external analog system. The voltage and current monitors are also available on an internal GPIB controller in the Absorber chassis so that their values can be queried over the bus. Additional functions in the chassis include an OVP detector for a secondary protection SCR in the case of a power interruption, and front panel status LEDs to show the operating status of the OVP circuit, relays and contactors. The oscilloscope photo example shows the action of the power supplies and regen circuitry to a specific loading condition. The photo shows an expanded view of the output voltage where the charge and discharge intervals are more visible. The bottom trace is output current that on the Energy Absorber power rack during a pulsed regenerative event. The top trace (1) shows the output voltage programmed to 270VDC at 10V/div AC coupled. The lower trace (3) shows the load current at 100A/div being switched between a resistive load of 100A and the Regen current at 150A. The arrow at the center of the scope trace is the zero current level. The scope trace is shown at 4msec/div.

Communication
Communication to control the power supply outputs and readback of voltage and current in the power supplies is accomplished with a GPIB interface using standard SCPI commands. The power supplies can also be operated manually from the front panels. The Energy Absorber chassis includes a GPIB interface for programming the Regen clamping limit, input contactor closure, dropout relay closure and voltage and current readbacks. A GPIB connection is provided on the rear of the rack for both interfaces.

AC Control and Distribution
The power rack system includes an AC distribution system. With a DC output power rating of 60kW at 480VDC and 150A, the AC input current to the rack is 120A per phase with a 400VAC, 3 phase, 4 wire connection. AC power to the racks is through two pin and sleeve type connectors and routed through circuit breakers and the mains disconnect interlock contactors. The AC interlock operates by energizing relays which are operated by ON/OFF switch closures located on the front panel or with auxiliary switch closures which are available through a rear I/O panel connector. The ON/OFF panel contains two pushbutton switches, an ON pushbutton and a twist to lock OFF button. A door interlock and single point ground connection are also provided.

DC Output
DC output is through an MS type connector of suitable type and ampacity on the panel depicted in the image above. A mating connector is provided. 

 

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Ametek Solar Array Simulator

sku Product SKU:  AME-Solar Array Simulator

A spacecraft solar array is subjected to large temperature excursions, varying insolation (the amount of sunlight falling on the array), mechanical changes and aging, which substantially effect both its short and long term
performance. In order to test the spacecraft's power environment, a cost-effective solution for ground based testing is to utilize a solar array simulator.

The Elgar SAS system reproduces all possible solar array outputs, based on the wide variety of input conditions that an array faces, including orbital rotation, spin, axis alignment, eclipse events, beginning-of-life and end-of-life
operation. The SAS also provides complete programmable control of all the parameters that shape the solar cell I/V output curve. By being able to accurately simulate solar panels under various space conditions with complete control, a system developer can comprehensively verify design margins and quickly test, in production,
spacecraft power systems and their associated electronics.

Each Solar Array Simulator is a fully integrated, turn-key system complete with Windows NT graphical user interface and hardware control software. It can be remotely controlled and addressable as a single device when integrated
into a customer's test system. This control is accomplished via a standard ethernet or optional GPIB interface using standard SCPI format commands.

As a very important consideration in spacecraft testing, discrete hardware protection systems are a standard part of every SAS. These include subsystems that can remove power at the output of the SAS in under 10 microseconds. Each SAS string has an electronic circuit breaker and relay disconnect, so faults are localized and minimize disruption of the last process. SAS systems have been designed and delivered ranging from desktop, 2 channel, R&D units to systems capable of controlling two 64 channel SAS systems simultaneously. AMETEK's Engineered Solutions Group can assist in defining special requirements and customize each system using a standard
building block approach. This allows each customer to get exactly what id needed while minimizing costs.

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