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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'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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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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# 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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Reliable fire and system protection:
Differential current monitor type B with pre-warning function, measuring range from10 mA to 3 A.
Early detection of insulation faults can prevent failure of complete electrical plants. Fault current monitoring by measuring differential current is the ideal method for this application. The monitoring requirement for today’s supply systems get more and more complex. Electronic control of drives, switched power supplies and chargers or fluorescent lamps with electronic ballast units can create DC fault currents in the case of earth faults. Standard differential current monitors do not detect this type of faults.
Type B differential current monitor DOLD varimeter IP5883 detects DC and AC fault currents in grounded voltage systems. The measurement is done by an external current transformer.
Contrary to RCD units, IP5883 does not disconnect the mains immediately but signals the fault. The unit includes an easy to read LED bar indicating the fault current and LEDs for operation, pre-alarm and alarm. The measuring range is 10 mA to 3 A. Additional features: broken wire detection, adjustable pre-alarm and test function. This varimeter offers advanced information for specific and cost effective maintenance BEFORE the plant breaks down.
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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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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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| ... products without technical information |
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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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