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Current Alternates direction of flow cyclically.

See Also: Alternating Current


Showing results: 2341 - 2355 of 2443 items found.

  • PXI Switches

    Keysight Technologies

    The PXI general purpose switch modules deliver fast, reliable switching in a variety of configurations. Cycle power to products under test, control indicator and status lights or actuate external power relays and solenoids with independent, single-pole, double-throw (Form C) or single-pole, single-throw (Form A) switches in a single PXI module. Choose between the high-speed, long-life reed relays capable of switching up to 100Vrms with up to 1A and 25W of power, or the higher power armature relays capable of switching up to 250Vrms, with up to 2A and 60W of power. The general purpose line also includes a module that offers the performance you need to switch heavy loads with up to 300W (DC resistive load)/1250W (AC resistive load).

  • Three-Phase Transformer Demagnetizer

    DEM60C - IBEKO Power AB

    After a DC current test, such as winding resistance measurement, the magnetic core of a power or instrument transformer may be magnetized (remnant magnetism). It can cause various problems such as wrong diagnostics, inaccurate measurements on a transformer, inrush current at the start-up of a power transformer, or incorrect operation of protective relays due to magnetized CT cores. The best way to eliminate this source of potential problems is to use demagnetizer on the power or instrument transformer.The DEM60C is a fully automatic test instrument which performs three-phase transformer demagnetization. Transformer magnetic core demagnetization requires the application of AC current with magnitude decreasing to zero. DEM60C provides this AC current by internally changing the polarity of a controlled DC current. During the demagnetization process, the instrument supplies the current at decreasing magnitude for each step, following a proprietary algorithm. It can demagnetize single-phase and three-phase power transformers.The instrument can be connected to all three phases of a power transformer to be demagnetized, on either the primary or the secondary side. If a user selects specific vector diagrams for different types of transformers, DEM60C will run a specific demagnetization procedure for each transformer type (i.e., single phase, delta, wye/star, zig-zag.) without switching the test leads.DEM60C enables safe and efficient power transformer demagnetization. The instrument automatically regulates the injection of current and discharging energy from the inductance. During and after the operation, an intrinsically safe discharge circuit with an indicator rapidly dissipates the stored magnetic energy. The discharging circuit is independent of the power supply, which improves its reliability in case of loss of power.Test currents of up to 60 A DC enable efficient demagnetization of even the largest power transformers. Using a DV Win software, it is possible to control DEM60C externally.

  • Variable Power Supply

    VS3 - Allied Edison LLC

    The VS-3 power supply is a very convenient portable, non-isolated “variable source” from 0 volts to 150 Vac or 0 volts to 150 Vdc and rated for up to 3 amps, thus the name VS-3. It is comprised of an illuminated voltmeter that reads to the first significant digit, AC variable system output voltage, DC variable system output voltage, logic output voltage and one sense (continuity) contact monitoring points. Banana jacks for connection of test leads are spaced at intervals that allow the use of dual banana test plugs if desired. The VS-3 is protected by two levels of overcurrent protection; AC input, and ground fault protection by a GFCI. All circuitry is housed inside a custom designed case made from 16 gauge steel. An Internal fan dissipates heat buildup and exhaust through louvered side vents built into the case. The carrying handle is designed with a “spring return to rest” position and is padded for comfort. The case has been sized for optimum portability and is balanced from the handle during transportation. The case has a powder coated finish that is scratch, chemical and weather resistant. Rubber padded feet support the case when in the upright position and a convenience receptacle is located on the side of the case. A unique feature of the VS-3 is that it contains “Magnet Packs” on the back of the case. These “Magnet Packs” can support the VS-3 and allow it to “hang” from any magnetic metal surface. The VS-3 can be powered by our UPS system, eliminating the need for an extension cord. The ability to magnetically attach the VS-3 near the source of connection and eliminating the need for an extension cord makes the VS-3 a “must have tool” for technicians.

  • Small/Medium Capacity Type High-Speed Rotation Torque Detector

    TH-2000/1000 Series - Ono Sokki

    The TH-1000 series torque detectors employ a new magnetic phase difference method with improving functionality while maintaining the advantages of Ono Sokki's conventional torque detectors. They incorporate high durability and long service life---the biggest features of our torque detectors. The new magnetic phase difference method does not require AC power supply to an auxiliary motor for rotation detection change. TH-1000 series is a standard type torque detector with the rotation speed range up to 6000 r/min. The TH-2000 series is a high-speed rotation type which can be used for torque characteristic test of high-speed rotating motor such as an EV/HEV motor, a centrifuge machine or the like. The characteristic data of the detector can be automatically set up on the TH-5100 torque meter when power is turned on.

  • Class 2 Sound Level Meter

    SP79 - Martindale Electric Co. Ltd

    The SP79 is a Class 2 sound level meter for on-site measurements in accordance with Noise at Work legislation in industrial and office environments. Featuring A and C frequency weighting and fast and slow time weighting, the compact design can be handheld, or mounted on a tripod for longer term monitoring of Min / Max values. Detailed recording and analysis can be made using the AC and DC outputs. The SP79 complies with BS EN 61672-1:2003 and is supplied with a detachable windshield and hard carry case. The large high contrast display includes both digital reading and analogue bar graph. An optional Class 2 sound level calibrator is available to verify accuracy before and after readings in accordance with international standards. The SPC70 is simple to use and provides a 1kHz reference at 94dB and 114dB.

  • Contact Resistance Measurement System

    CRMS - Ultra-Tech Enterprises, Inc.,

    The CRMS is a system designed to allow any user to measure the resistance of each set of relay contacts associated with the relay under test. The test system consists of a CONTACT RESISTANCE MEASUREMENT UNIT (CRMU), a MULTIPLE RELAY TEST RACK, as well as an interconnect CABLE ASSEMBLY. Either DC or AC energy to pick and drop relay coils under test for all contact measurements is supplied from the CRMU and easily interfaces with the Multiple Relay Test Rack. For additional and more thorough testing of relays an external relay tester can be interfaced to the Multiple Relay Test Rack to supply energy to the relay coil. It is recommended that the UTE Relay Tester With Timer/Counter (UTE Product # 15967-00) be utilized so the operator can take full advantage of the unique features it offers

  • Core Loss Tester

    VCL - Veer Electronics

    Core loss testing has become one of the most important tests for quality assurance in the motor industry. The function of a core loss test is to determine weather a motor has damaged core iron. Damage could include shorts between laminations and electrical arching. Although it is possible for a motor to still run with damaged core but the efficiency of that motor will be greatly reduced. The Motor will consume more power to operate at normal levels and it will cause the Motor to generate more heat. Heat will reduce the reliability of the motor and its overall life. VEER make Core Loss Tester is portable & easy to use instrument which is very useful to measure AC magnetic properties of Electrical steel of core of different grade and size. We provide Free Computer software along with instrument to create test report in computer.

  • Programmable Signal Conditioning

    DTX 5000 Series - R.C. Electronics, Inc.

    The DTX-5000 Signal Conditioner Series provides up to 64 channels of state-of-the-art signal processing in a compact (5U) chassis. Using hybrid mixed-signal technology, high-performance analog circuitry is combined with Digital Signal Processing to give gain accuracy performance previously available only in larger customized modules. A simple-to-use graphical user interface running under the Windows 2000 operating system allows for ease of setup and either local or remote operation as a network-based instrument node. The suite of conditioner modules include a strain amplifier with internal bridge completion, a general-purpose instrumentation amplifier with selectable AC or DC coupling, a linearized thermocouple amplifier with cold-junction compensation, a frequency-to-voltage converter with dual inputs for direction sensing, and an ICP accelerometer amplifier with constant-current excitation.

  • Fluxmeter

    480 - Oersted Technology

    The Model 480 is a laboratory grade fluxmeter, for use with a Helmholtz coil or custom search coils. This instrument measures the total flux of a magnet part, which can be related to the magnetic field strength. Applications include magnet testing, magnetizing, and automated field measurement. In order to provide accurate and repeatable measurements, automatic or manual drift compensation is available to the user. A peak mode allows even the fastest magnetic pulse, such as those from a magnetizer, to be accurately measured. The Model 480 is also useful for measuring AC fields that are too high in frequency for a gaussmeter to detect. Relay outputs and an external reset input allow for simple automation functions to be implemented, while the RS232C and IEEE-488 ports permit advanced control of the fluxmeter via a remote computer or automation equipment.

  • Computer Controlled Electronic Relaxation Testing Machine

    ERT-300 - Jinan Testing Equipment IE Corporation

    Model ERT-300 Computer Controlled Electronic Relaxation Testing Machine is designed for the relaxation tests ofPC steel bar, steel wires, indented wire, and galvanized steel wire etc. This machine adopts vertical load framewith great rigidity, AC servomotor with zero clearance & great torque precise reducer to drive the screw to carryout the adjustment of the test space, the tension of specimen and keeping of the load force, to complete therelaxation test. The machine is equipped with especially designed industrial PC. The control and data processingsystem of IPC has very high reliability, which can meet the requirements of data adopting, displaying, storage anddata analyzing demanded by the relaxation test that over 1000 hours; Testing standard: ASTM E328, ISO 15630, BS5896, ASTM A1061 etc.

  • Multi-channel DC Electronic Load

    IT8700 Series - I-TECH Electronic Co., Ltd

    IT8700 series programmable DC electronic load adopts removable modules design, supports up to 16 channels with mainframe extension transient mode up to 25 kHz, which improves your test efficiency, with high resolution and accuracy. Users can freely choose in the 8 load modules according to the number of channels and power requirements, controlled by mainframe control panel, or controlled by host computer software via built-in LAN / RS232 /USB / GPIB interface. IT8700 is with adjustable slope, list function, automatic test and other functions, and can be applied to multiple or single output AC/ DC, DC / DC power converters, chargers and other power supply electronic components performance test, also can be used in ATE test system, solar cells, LED, communications testing, aerospace and other fields.

  • Dynamic Digital I/O With Per Channel Timing, Programmable Logic Levels And PMU PXI Card

    GX5296 - Marvin Test Solutions, Inc.

    The GX5296 offers advanced dynamic digital I/O performance and capabilities in a single slot, 3U PXI format. The 32-channel, GX5296 features timing per pin, multiple time sets, data formatting, and an advanced sequencer – providing users with the capability to emulate and test complex digital busses for system, board or device test applications. Offering sub-nanosecond edge placement resolution per pin and a PMU per pin, the GX5296 has the ability to perform both DC and AC parametric testing. Each digital channel can be individually programmed for a drive hi, drive lo, sense hi, sense lo, and load value (with commutation voltage level). In addition, each channel offers a parametric measurement unit (PMU) providing users with the capability to perform parallel DC measurements on the DUT (device under test).

  • Inductive Sensors

    Bernstein AG

    In general, inductive proximity switches consist of four basic elements: a coil, an oscillator, a threshold switch and an output stage with short-circuit protection.The oscillator generates a high frequency, electromagnetic alternating field which is emitted from the active face of the coil.Eddy currents are induced in a metal object that enters this field. These eddy currents draw energy from both the electromagnetic field and from the oscillator which is consequently attenuated.The more energy taken the closer the metal object moves towards the active face. The threshold switch switches on the output stage at a defined attenuation value.In proximity switches with a DC voltage supply, this switch is designed as an NPN transistor which switches the connected load to the negative pole or as a PNP transistor which switches the load to the positive pole. The output stage is a thyristor or a triac in AC voltage switches.

  • 24-Bit High-Resolution Dynamic Signal Acquisition and Generation Module

    PCI-9527L - ADLINK Technology Inc.

    The PCI-9527L is a high-performance, 2-CH analog input and 2-CH analog output dynamic signal acquisition board. This board is specifically designed for audio testing, acoustic measurement, and vibration analysis applications.The ADLINK PCI-9527L features two 24-bit simultaneous sampling analog input channels. The 24-bit sigma-delta ADC provides a sampling rate up to 216 KS/s at high resolutions, making it ideal for higher bandwidth dynamic signal measurements. The sampling rate can be adjusted by setting the onboard DDS clock source to an appropriate frequency. All channels are sampled simultaneously and accept an input range from ±40 V to ±0.316 V. The PCI-9527L analog input supports software selectable AC or DC coupling and 4 mA bias current for integrated electronic piezoelectric (IEPE) sensors.

  • 3000A Datalogging Power Analyzer Kit

    Extech PQ3450-30 - Extech Instruments Corporation

    The PQ3450 is a 3-phase power analyzer/data logger capable of logging up to 30,000 sets of measurements in Excel format on a removable SD memory card. Large dot-matrix, sun-readable, numerical, backlit LCD with easy-to-use onscreen menu. Full system analysis with up to 35 parameters. Adjustable Current Transformer CT (1 to 600) and Potential Transformer PT (1 to 1000) ratio for high power distribution systems. Log up to 30,000 reading on a removable SD memory card in Microsoft Excel format. Wide sampling rate range (2 seconds to 2 hours). Built-in Clock and Calendar. Complete with 4 voltage leads with alligator clips, three 3000A flexible current clamps, 8 AA batteries, SD card, 100-240 Volt AC adaptor and case.

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