Shunts
An Instrument Shunt is a resistor connected in parallel with a measuring device to move the current range beyond a particular value for which the instrument is capable of measuring directly.
See Also: Current Shunts
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Product
Current Transformers And Shunts
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Current transformers allow the different measuring devices to provide reliable and traceable data on the trends involving consumption and production processes in electrical installations. Especially designed to be installed quickly, easily and securely, meeting the most demanding expectations of today's market, covering a wide range of primary currents as well as multiple secondary outputs, both for AC and DC measurement.
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AC Current Shunts
CSA Series
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Ohm-Labs’ CSA series of ac current shunts are designed as laboratory standards for ac current measurement up to high frequencies.
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Product
Precision Shunts
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Ohm-Labs manufactures metrology grade shunts for precise measurement of current from <1 mA to 3000 A.
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DC Current Shunts
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DC current shunts / standards are true 4-terminal devices that precisely measure DC currents from 10 A to 10,000 A. They use special alloys in the resistive elements which are supported on an insulating base for mechanical stability. The 9230A includes special features to reduce the effects of power dissipation and associated self heating errors. These shunts are designed to operate in air at full rated current. These are the best performing, and most widely used, DC metrology shunts in the world.
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Product
Signal Conditioner
DMA2
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Din rail mountable with user selectable outputs of +/-10V, +/-5V or 4-20 mA. 10-28VDC powered suitable for battery or automotive use. Features 1000 Hz bandwidth and push-button shunt calibration.
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Product
100 Pin Breakout Interface
VSI-Breakout-100
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The VSI-Breakout-100 is a very useful tool in debugging signals or software in a system. It allows unlimited access to signals within the cabling that might otherwise be difficult to access. The board gives test points at each side of the connector and jumper with a easy to use tabbed shunt to allow for easy disconnection of any particular signal between the connectors. The jumpers also give an opportunity to inject a signal regardless of what signal was originally being driven.
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Product
68 Pin Breakout Interface
VSI-Breakout-68
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The VSI-Breakout-68 is a very useful tool in debugging signals or software in a system. It allows unlimited access to signals within the cabling that might otherwise be difficult to access. The board gives test points at each side of the connector and jumper with a easy to use tabbed shunt to allow for easy disconnection of any particular signal between the connectors. The jumpers also give an opportunity to inject a signal regardless of what signal was originally being driven.
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Product
4-Ch DPDT 10A-250VAC 24VDC Multiplexer
H62004900
Multiplexer Module
Up to 10A 250Vac 10mOhm Measurement Shunt Controlled via YAV90304 Form F
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Product
Crossing Control Bypass Switch
XCBS-DL
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The XCBS-DL is permanently wired into each crossing warning system, and can be configured with either a removable or non-removable bypass key. Simply connect the track connection harness to the designated track connection terminals. To prevent unnecessary operation of the crossing warning system, insert the key and select "bypass", rotate the knife switch to "bypass" and the crossing is disabled. When in the "bypass" position, a Dummy Track Load is connected to the track wire connections in parallel with the rails and the crossing approaches are shorted, preventing unnecessary activation when track equipment is working in the crossing approach circuit. The opening of one track lead may be desired to prevent unnecessary activation with intermittent shunting on the crossing approaches close to the crossing.
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Product
Current Sensors
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Measurlogic offers an array of current sensors for every need, including split core, solid core and Rope current transformers (CTs); DC Shunts and Hall Effect Sensors. All of our electrical sensors are designed with an easy, un-intrusive installation in mind. With a low cost and high accuracy guarantee, we provide top of the line solutions for measurement and cost savings for residents and business owners alike.
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Product
Precision Shunt Chip Resistors
SMV
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*5W permanent power at 65C*High pulse power rating*Mounting: Reflow and wave-soldering
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Product
Current Sensing
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voltage-output, current-sensing amplifier family that integrates an internal shunt resistor to enable high-accuracy current measurements at common-mode voltages that can vary from 0 V to 36 V, independent of the supply voltage. The device is a bidirectional, low- or high-side current-shunt monitor that allows an external reference to be used to measure current flowing in both directions through the internal current-sensing resistor sensor. The integration of the precision current-sensing resistor provides calibration equivalent measurement accuracy with ultra-low temperature drift performance and ensures an optimized Kelvin layout for the sensing resistor is always obtained.
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Product
High-Voltage Isolation Amplifier
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Knick Elektronische Messgeräte GmbH & Co. KG.
Measurement of DC or AC voltages up to () 3600 V and of large DC currents to about () 20 kA with shunt resistor or directly in the device to () 5A DC and AC. Variants with calibrated range selection.
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Product
Shunt Regulators
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These are the standard reference voltage source widely used by the feedback circuits of switching power supplies. Compared to the Zener diode, which is a discrete product, a shunt regulator has much better voltage precision because voltage control is carried out as an IC.
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Product
Transconductance Amplifier
1620A
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The 1620A provides high accuracy current levels from dc to over 10 kHz for calibrating ammeters, current transformers and shunts. It also provides output current up to 100 Amperes and as such may also be used as a high accuracy power supply, and as a power source in welding and bonding applications.
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Product
Precision AC/DC Active Current Shunt
2575A
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A versatile, powerful calibration tool, the 2575A Precision AC-DC Active Current Shunt measures both AC/DC current and works as a standard for low-level resistance calibration requirements.
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High Impedance Active Probes
12C
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A high speed, high input impedance active probe for measuring the internal node voltage of integrated circuits. The input is 1 megohm shunted by 0.1 pf and the rise/fall times are 0.8 ns. This instrument has full dc capability and can be used with any oscilloscope. The Model 12C was specially designed so that when used in conjunction with a high input impedance oscilloscope, signal attenuation is 10:1 and with a 50 Ohm input, signal attenuation is 20:1.
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Isolation Amplifiers
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Isolation Amplifiers provide power supply designers with a higher performing, single chip alternative to isolation techniques based on optocouplers and shunt regulators. Analog Devices ADuM3190 and ADuM4190 isolated error amplifiers have a 400 kHz bandwidth, with 0.5% typical initial accuracy at 25°C and 1% total accuracy over the extended temperature range of –40˚C to +125˚C. This provides manufacturers of ac-to-dc and dc-to-dc power supplies with a significant upgrade in speed and operating temperature range, as well as a 5× improvement in transient response.
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Product
PXIe-4331, 102.4 kS/s, 24-Bit, 8-Channel PXI Strain/Bridge Input Module
781345-01
Strain/Bridge Input Module
102.4 kS/s, 24-Bit, 8-Channel PXI Strain/Bridge Input Module—The PXIe‑4331 is a high-speed input module that provides integrated data acquisition and signal conditioning for dynamic strain, load, and pressure measurements. This module includes increased accuracy, high data throughput, and synchronization features, making it ideal for high-density measurement systems. To remove noise, the PXIe‑4331 offers antialiasing and digital filters per channel. Each channel also features an independent, programmable excitation voltage. Additionally, the PXIe‑4331 provides remote sensing, internal bridge completion, and shunt calibration options per channel.
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30 A Current Shunt
34330A
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Measure current safely with this precision 0.001 ohm resistor housed in a plastic case surrounded by epoxy.
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Product
PXI Strain/Bridge Input Module
Strain/Bridge Input Module
PXI Strain/Bridge Input Modules feature up to eightchannels that support quarter-, half-, or full-bridge sensors at speeds up to 102.4kS/s. The modules provide increased accuracy, high data throughput, and a range of synchronization features. Optional features include remote sensing, internal bridge completion, and shunt calibration options per channel. PXI Strain/Bridge Input Modules are ideal for dynamic strain, load and pressure measurements, and test cell installations requiring accuracy and flexibility.
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Working Standard Shunts
CSW
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CSW shunts are rated to 100 % continuous current with no loss of accuracy. They are largely immune from connection errors common to many shunts. All CSW shunts include ISO17025 accredited calibration through full current range.
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Repeated Charge Discharge Test Set
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The IS 13341 : 1992 has laid down the requirements for Ageing Test, Self-Healing Test and Destruction Test on Shunt Capacitors of the self healing type for AC Power Systems. The Ageing Test is to be performed at a specified voltage of 1.25 times the rated voltage for 750 hours. The test is to be followed with a repeated discharge cycle test which involves charging of the capacitor to a DC voltage and discharge of the same through an Inductance. Sivananda Electronics has developed this equipment for the benefit of capacitor manufacturers, for the first time in India.
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Current Probes
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Teledyne LeCroy current probes do not require the breaking of a circuit or the insertion of a shunt to make accurate and reliable current measurements. Based on a combination of Hall effect and transformer technology, Teledyne LeCroy current probes are ideal for making accurate AC, DC, and impulse current measurements.
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Capacitance Bridge
1621
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The GenRad1621 Capacitance Measurement system is a completely self-contained system capable of capacitance measurements in increments as small as 0.1 aF (10-4 pF) and conductance measurements in increments as small as 100 aU (10-7 U; equivalent to a shunt resistance of 1010 M). Measurements are three terminal, with 2- or 3-terminal connection, and provision is also made for the connection of an external standard for comparison measurements.
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Shunt Resistor
RSR
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Power converters and current measurement instruments. Large current shunt resistor for ampere-meters, designed for standard current measurement of electric equipment. Easy current measurement is performed by attaching to current bus bar directly and connecting to ampere-meter through flexible wires.
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Signal Conditioners
General Purpose
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Encore offers a complete line of General Purpose Signal Conditioning instrumentation to meet even the most demanding requirements. Packaged as interchangeable two-channel plug-in modules, Encore’s broad product line includes frequency to voltage converters, strain gage amplifiers, accelerometer conditioners, digital voltmeters and DC power supplies. All of our systems feature a common CAL input on the rear of the rack which allows for calibration of the entire rack. Calibration function varies based on the modules installed. For example, the Model 633 applies a shunt calibration resistor across the bridge, while the Model 149 applies a reference charge source to the input. Contact Encore today and let our team of design engineers help you determine which of our products is best for your application.
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Reactor Loss Measurement Systems
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Measurements International Ltd.
The AccuLoss® SR2020 System by Measurements International emerges as a premium, dependable solution tailored for measuring losses in high-voltage shunt reactors. Specifically engineered to function seamlessly at remarkably low power factors, this system excels in applications demanding extensive scalability. Notably, the AccuLoss® SR2020 System offers two key advantages: unparalleled accuracy and remarkable speed.
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Electrical Standards
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To verify the performance of an electrical calibrator or dc calibrator, you need an electrical standard. Fluke Calibration standards are found in primary calibration laboratories across the world. A wide range of electrical standards and frequency standards are designed to meet the needs of today’s laboratories for traceability and quality accreditation while also being portable, simple to use, and easy to support. Electrical standards include: Voltage standards; ac/dc transfer standards; ac measurement standards; resistance standards; ratio standards; current shunts.
