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Conventional AC test transformers are especially designed for testing objects of medium capacitance. These systems are particularly suited for tests requiring stable voltage even if the load changes under voltage (corona, wet & pollution tests) or when the load is inductive (inductive voltage transformers).
The possibility of stacking several of these transformer modules allows reaching very high voltage levels by keeping reasonable floor space.
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clamp on meter is a combination power analyzer, power quality logger, and clamp meter, and is ideal for monitoring electronic loads.
With the bright color power meter display to analyze the harmonic spectrum, a low-pass filter to remove high frequency noise, and a high EMC immunity design, the Fluke 345 power analyzer is ideal for troubleshooting power quality on switching loads. Additionally, the Hall Effect clamp meter design makes measurement of dc current possible without the need to break the circuit with the power meter. The internal memory of the power analyzer enables long-term power quality logging for analysis of trends or intermittent problems.
Applications
Setup and troubleshoot variable frequency drives and UPS systems - Verify correct operation by measuring key power quality parameters
Harmonics measurements - Uncover harmonic issues that can damage or disrupt critical equipment
Inrush capture - Check start-up current where spurious resets or nuisance circuit breaker tripping occurs
Load studies - Verify electrical system capacity before adding loads
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Product ID: CA-60
AC/ DC mA Current Clamp-on Transducer
1. This miniature clamp meter features two Hall effect sensors
2. For use with any multimeter with 200mV or/and 2V ranges
for direct readout input impedance of least 1M ohm.
3. High conversion factor for low DC and AC mA measurement.
4. With the small jaw size it can fit into tight space in circuit panel
or wire bundle to take the reading
5. The high frequency response at 20 kHz is useful for
waveform monitoring on an oscilloscope.
6. Zero adjustment is made easy by just pushing the ZERO button.
7. It is best for locating small signal, industrial control,
battery leakage,and automotive usage
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Current must always be measured in our power test systems, of course, but that's just the beginning. Amperage is an important measurement in hundreds of other data acquisitoin applications, too.
We understand that, so we provide more than one choice of current clamp, and also, convenient flexible current sensors (aka Rogowski coils). DEWETRON current sensors output voltage, so they can be used directly with our medium gain voltage input connections. Every current sensor has a phase shift, and this can be offset using the standard sensor database included with DEWESoft! Yes, we thought of that.
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With its unique 100mm jaw opening, the Seaward Type L Plus large jaw current clamp meter is designed for the measurement of current in large diameter conductors and fuses.
With the ability to operate in the most difficult circumstances the instrument is capable of use on porcelain fuse carriers in distribution systems.
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511 Clamp-On Meters
The Clamp-On Meter Model 511 is a general purpose professional clamp-on meter that measures up to the toughest standards. It is built into a rugged mechanical case and is designed using quality polycarbonate materials. This meter offers a complete set of measurement ranges and is in compliance with international safety and quality standards to ensure a professional and reliable measuring tool. The Model 511 is auto-ranging and provides the best measurement range and resolution for troubleshooting. It has a high resolution 40A range.
The Model 511 measures AC Amps, AC Volts, DC Volts, Ohms, Continuity (with beeper), Frequency (from V or A) and has a Diode Test function.
The Model 511 is sized for a comfortable, one-handed operation. This model is average sensing and designed for traditional average responding electrical systems. The jaw opening for the Model 511 is 1.575" (40mm).
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To ensure impeccable measurement quality, the F15 gives measurements in RMS, whether or not the current is deformed or sinusoidal. In addition, it offers DC measurement with fully automatic zero adjustment.
# AC (RMS) intensity: 0.2-400 and 700A (2 cal.)
# DC 400 and DC 1,400A intensity (2 cal.)
# accuracy: 2.5%+/-2ct *
# AC & DC voltage: 400 and 600V (5 cal.)
# accuracy: 1.5%+/-2pt *
# RMS
# auto AC/DC and auto-range (with manual selection possible)
# bandwidth: 45Hz-450Hz
# resistance: 0.5-400Ω to 4MΩ (5 cal.)
# audible continuity test: R < 40Ω
# frequency 1.00Hz to 4kHz (3 cal.)
# functions: automatic DC zero, memory, max/min and automatic stop
# adaptor calibre (ADP) 0-4,000mV, acc. 0.1%+/-15ct
# clamping: 1 cable ø42mm, 2 cables ø25mm, 2 bars 50 x 5mm
# electrical safety: IEC 1010 & IEC1010-2-032 600V Cat III-2
# dimensions: 254 x 97 x 46mm - weight: 600g
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Easily monitor leak current fluctuations
Wide bandwidth, 5 Hz to 15 kHz (Waveform output)
High-sensitivity with a full scale of 10 mA (resolution:10 µA)
High-accuracy at ±1 %
True RMS measurement
Analyzer functions, for filtering and output signals
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Clamp-on current probes or "current clamps" enable the user to measure currents without breaking the electric circuit. Current clamps are designed with jaws that can be opened, placed around the conductor and clamped closed to form a magnetic loop around the conductor.
Current clamps offer a safe, cost-effective, simple and accurate way to take current measurements.
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High quality analogue instruments designed to measure an extensive range of electrical and electronic parameters. This comprehensive range offers DIN instruments, ANSI switchboard meters, panel indicators, sealed and ruggedised instruments, and complementary selector switches for line to line and line to neutral readings. Instruments are precision engineered and robust in design, ensuring accurate measurement and display in the most demanding of environments. All instruments are available in a range of styles, sizes and specifications to meet the exacting needs of industry.
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Honeywell's closed loop current sensors consist of a Hall-effect sensor mounted in an air gap of a magnetic core, a coil wound around the core and a current amplifier. The current carrying conductor placed through the aperture of the sensor produces a magnetic field that is proportional to the current. The core concentrates the magnetic field which is measured by the Hall sensor. The Hall sensor is connected to the input of the current amplifier, which drives the coil. The current through the coil produces an opposing field to that provided by the current through the aperture. The magnetic flux in the sensor core is constantly controlled at zero. The amount of current required to balance zero flux is the measure of the primary current flowing through the conductor, multiplied by the number of turns on the coil. This current can be expressed as a voltage by passing it through a resistor. Variety of package styles available.
Best Used For:
Applications requiring high linearity and accuracy, fast response and low temperature drift such as variable speed drives, overcurrent protection, current feedback control systems, robotics and welding power supplies.
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For exponential current impulse ECI 1/20us, 4/10us, 8/20us and rectangular current impulses (RCI) and operating duty testing with current amplitudes up to 100kA.
Used in R&D testing of metal oxide surge arrestors and arrestor sections according to IEC 60099-4 and ANSI/IEEE C 62.11.
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Conducted currents can be measured without making direct contact with the source conductor or metallic surface by means of clamp-on broadband current probes. The BCP-5xx EMC Current Probes are designed to permit field intensity meters, spectrum analyzers, and other 50W impedance instruments to measure quantitative magnitudes of current. Measurements can be made on single and multi-conductor cables, ground and bonding straps, shielded conduits and on coaxial cables. We have 11 models of Broadband Current Probes. Please vist our website for more details. www.AHSystems.com
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# For use at 20 kHz - 50 kHz and higher
# 1 Volt per Ampere sensitivity (variable through suitable termination)
# Available in molded (CS1XXX Series) or encapsulated (D18XX Series) versions
# 0.5 mm minimum wall thickness meets IEC 380, VDE 0730 and other requirements
# RoHS-compliant. Tin-silver over copper terminations.
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A broad range of AC and DC current sensing devices with a variety of AC and DC contacts. Available with fixed and adjustable setpoints for underload and overload detection.
‘AS1’ Current Switches from NK Technologies combine a current transformer, signal conditioner and limit alarm into a single package. The AS1 series has an extended current input range, universal solid-state outputs and a wide frequency response. Available in a split core case or two styles of solid core cases.
Application :
Electronic Proof Of Flow
— No need for pipe or duct penetrations.
— More reliable than electromechanical pressure or flow switches.
Conveyors
— Detects jams and overloads
— Interlocks multiple conveyor sections
Lighting Circuits
Easier to install and more accurate than photocells.
Electric Heaters
Faster response than temperature sensors.
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An extensive range of high specification transducers providing measurement, isolation and conversion of electrical parameters into industry standard DC output signals, RS232 and Modbus. The ranges offer protection against high voltage and overload, and are resistant to vibration in harsh electrical environments.
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VFD and SCR output waveforms are rough approximations of a sine wave. There are numerous spikes and dips in each cycle. ATR transducers use a mathematical algorithm called "True RMS," which integrates the actual waveform over time. The output is the amperage component of the true power (heating value) of the AC current waveform. True RMS is the only way to accurately measure distorted AC waveforms. Select ATR transducers for nonlinear loads or in "noisy" power environments.
The current waveform of a typical linear load is a pure sine wave. AT transducers measure the peaks of these sine waves, then calculate the average amperage. This works well on constant speed linear loads in a "clean" power environment. Select AT transducers for strictly linear loads on "clean" power.
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The manual desktop operating terminal OT 276 allows manual, easy control of an AC test system.
The device is primarily intended as low cost, stand-alone solution for small AC source, which do not require an embedded control.
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OMICRON's CT Analyzer is a unique lightweight electronic multifunctional instrument designed to meet the highest standards for performing excitation, ratio, polarity and winding resistance tests on current transformers (CTs) as well as burden-impedance measurement.
Applications
- Burden measurement
- CT Winding resistance measurement
- CT Excitation characteristic recording
- CT transient behavior measurement (IEC60044-6)
- CT ratio measurement with consideration of connected burden
- CT phase and polarity measurement
- Determination of accuracy limiting factor (ALF), instrument security factor (FS), secondary time constant (Ts), remanence factor (Kr), transient dimensioning factor (Ktd), knee point voltage/current, class, saturated and non saturated inductance
- Assessment according to defined standards: IEC60044-1, IEC60044-6, IEEE C57.13-1993
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he DCT ReporteR instrument automatically tests Current Transformers reducing testing time from hours to minutes. Results can be printed out by the 40-character-wide built-in printer, or easily transferred to a PC via RS-232 and USB ports or memory-stick.
Digital Current Transformer ReporteR Features
* Tests turns ratio, polarity and phase angle
* Measures excitation values and presents results in a table or as a graph
* Calculates saturation voltage
* Tests winding resistance
* Tests insulation resistance
* Provides option to design and save customized Test Plans
* Features a built-in current source for secondary injection testing
* Outputs up to 2,000 Vac
* Easily transfer stored data to memory stick or PC via USB port
* ReporteR Software (included) makes report preparation fast and easy
* A large, color multi-language LCD screen and a keyboard
* Extensive memory for test results
* A 40-character-wide built-in printer
* Compatible with Microsoft Excel® and Microsoft Word®
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Appropriate equipment for indication and supervision of alternate current, the PRU adds protection, security and trustworthiness. With alarm superior and inferior ideal for protection of loads is monitored and generally. It owns parameter of time-lag for alarm action. Access to the parameters protected by password.
Dimensions: 48x96x95mm;
Approximate weight: 360g;
Feeding: 110/220Vca, 50-60Hz;
Exit to relay 5A;
External or direct TC/5A until 25A.
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Flexible output options make this meter the right choice for many applications. With display scaling
the user can display engineering units from a linear DC input. Using the relay output users can set alarms or shut down the process.
• 14.2mm character high visibility LED display.
• 1/8 DIN (96mmX48mm) bezel.
• Simple user programming.
• Display scaleable to show engineering units.
• Programme lock out facility.
• AC and DC powered models available.
• Analogue re transmission option.
• Dual relay output option for alarms or ON/OFF control.
• RS485 communications option.
• CE approval (UL and cUL pending).
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The Leakage Current Tester TOS3200 is designed to perform leakage current (touch current and protective conductor current) tests on general electrical equipment but not medical electrical equipment.
It enables you to conduct tests that conform to the requirements of the applicable IEC, UL, JIS, and other standards, as well as the Electrical Appliance and Material Safety Law. The memory in the main unit stores the 51 types of test conditions laid down in the IEC/JIS standards for information technology equipment, household electrical appliances, audio, video electronic apparatus, luminaires, motor-operated electric tools, and electrical equipment for measurement and control and in the Electrical Appliance and Material Safety Law, thereby enabling you to conduct standard tests with simple panel operation.
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Leakage Current Measurement Essential for Electrical Safety
Automatically compatible with Networks stipulated by IEC/UL/JIS standards
Automatic measurement function (Measuring power supply polarity switching as well as the normal state / single failure state)
Stores data for 100 units
Power supply separation
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* The only two-in-one current/voltage detector designed for electrical testing
* Non-Contact AC Voltage detection
from 12V to 600VAC
* Non-Contact AC Current detection
from 200mA to 1000A
* Sensitivity adjustments to increase or
reduce sensor trigger threshold
* Current sensor detects current flow through shielded wires, conduit, and metal circuit breaker/junction boxes
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* Non-contact AC Current range
is from 200mA to 1000A
* Locates current flow even where
voltage detectors cannot work
* Detects through shielded wires, conduit, and metal circuit breaker or junction boxes
* Sensitivity adjustment for locating wires/conduit through walls
* Audible and visible indication
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Honeywell open loop current sensors consist of a Hall-effect sensor mounted in an air gap of a magnetic core. The current carrying conductor placed through the aperture of the sensor produces a magnetic field that is proportional to the current. Open loop current sensors measure dc and ac currents, and provide electrical isolation between the circuit being measured and the output of the sensor. Variety of package styles available.
Best Used For:
Applications requiring galvanic isolation such as battery circuit management.
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Resistance meter, electrometer, picoammeter, low current meter, micro-ohmmeter, current source.
Picoammeters
- Model 428-PROG Programmable Current Amplifier
The Model 428-PROG Programmable Current Amplifier converts fast, small currents to a voltage, which can be easily digitized or displayed by an oscilloscope, waveform analyzer, or data acquisitionsystem. It uses a sophisticated "feedback current" circuit to achieve both fast rise times and sub-picoamp noise. The gain of the Model 428-PROG is adjustable in decade increments from 103V/A to 1011V/A, with selectable rise times from 2μs to 300ms.
- Model 6485 5-1/2 digit Picoammeter with 10fA Resolution
- Model 6487 Picoammeter/Voltage Source
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The AC and pulsed DC sensitive residual current monitor RCMA420-D (Type A) from Bender is designed for fault and residual current monitoring in earthed power supply systems (TN and TT systems) where an alarm is to be activated in the event of a fault, but disconnection must be prevented. In addition, the device can be used to monitor the current in single conductors, such as PE conductors, N-PE connections and PE-PAS connections. Due to the use of measuring current transformers, the device is nearly independent of the load current and the nominal voltage of the system.
The response value can be adjusted in the range of 10...500 mA. When the prewarning level is reached (50% to 100% of the response value), an alarm message is generated. This information achieved sufficiently well in advance can avoid unexpected disconnections and costly downtimes.
Typical application fields are: Residual current monitoring in earthed two, three or four conductor systems; construction site equipment; current monitoring of single conductors de-energized under normal conditions; socket-outlet circuits for devices which are operated unattended for a long time and which may not fail; alarm systems; safety devices.
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The RCMS system consists of one or several RCMS460-D / -L or RCMS490-D / -L residual current evaluators, which are able to detect and evaluate fault, residual and operating currents in earthed power supplies via the associated measuring current transformers. The maximum voltage of the system to be monitored depends on the nominal insulation voltage of the measuring current transformers used in case of busbar systems, or on the cables or conductors that are routed through.
Closed W...AB series measuring current transformers are required to measure AC /DC sensitive residual currents (0...2000 Hz). Six W...AB series measuring current transformers require one AN420 power supply unit. W... (closed), WR... (rectangular) and WS... (split-core) series measuring current transformers are used for alternating and pulsating currents (42...2000 Hz).
The measuring current transformer series can be used in any combination with the measuring channels of the evaluators. Each RCMS460-D / -L and RCMS490-D / -L utilizes 12 measuring channels. Up to 90 RCMS evaluators can be connected via a BMS bus (RS-485 interface with BMS protocol), thereby up to 1080 measuring channels (sub-circuits) can be monitored.
If this product is to be used for personnel, fire or plant protection, the frequency response can be set accordingly. The measured currents can be analyzed for harmonics.
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Current measuring devices
