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HE055T01
High Accuracy,
Fast response,
Numerous packaging options,
PCB Mountable,
Suitable for automated assembly,
50Arms
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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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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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Rogowski coils for measuring AC current from milliamps to kiloamps, suitable for measuring devices, welding machines, instrumentation, etc.
MFC150
Flexible Rogowski coil
- Offers a good accuracy, linearity
- Not influenced by magnetic fields
- Useful for measuring the harmonic content in electric currents
- Available in different length up to 2m
- The most confortable and cost effective solution
GPC80
Split-rigid Rogowski coil
- Used in applications with high powers
- Suitable for measuring current values in precision welding systems, in arc melting furnaces, but also for the measurement of starting transients for electronic motors or sudden short circuits
The integrator is essential to shift by 90° the output signal of the coils. The integrator consists of an active electronic circuit with negligible offset and a good linearity.
RPS100
Multiscale Rogowski coil adapter
- Signal converter for flexible Rogowski transducers
- Equalization of the measured signal
- Output signal 0.9 Vrms
- Power supply 230 Vac or 120 Vac (on request)
- Available in two different version: 3 or 6 scales
- Customized calibration by adjusting the three trimmers
RPS50
Electronic integrator for Rogowski coils
- Essential to shift by 90° the output signal of the coils
- Ensure accurate power and energy measurement
FCA3000
Three channels Rogowski current converter
- Three Rogowski Coils Input Channels
- Converts the values measured by a Rogowski coil into true RMS value
- Four 0÷20mA outputs
- 80-260 Vca or 19-60 Vdc power supply
Our portable and panel meters can interface Rogowski coils directly without an external integrator.
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CALIBRATOR SP - Vital for Quality Assurance and ISO 9000
-Used for periodic verification and calibration of AC, AC-HF, DC, and Impulse Spark Testers of any model and any make. Complies with all Spark Tester standards.
-Test voltage and short circuit current measurement can be certified.
Important Features:
-Measures all existing categories of test voltages
-Measures test voltage, short circuit current, frequency, fault sensitivity
-Easily accessible on the line, thanks to compact and ergonomic design
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Current measuring devices
