AC/DC high voltage transducer for True RMS measurement. Input signals from VIN = 60 mV AC up to VIN = 10 V AC
The VariTrans P 41000 TRMS isolation amplifiers have been specially conceived for measurements of bipolar voltages ranging from millivolts to volts. They reliably isolate high potentials at the input circuit. Thanks to the true rms conversion in the transducer, even distorted input signals are captured correctly and output as so-called true rms values.
The isolating distances are designed to withstand permanent voltages up to 3600 V AC/DC and fast transients up to 20 kV.
AC Input 60 mV~ to 10 V~
DC output 0 (4) ... 20 mA, 0 ... 10 V
New TransShield technology allows for extremely compact modular housing
Working voltages up to 3600 V AC/DC
Protection against electric shock through protective separation up to 1800 V AC/DC according to EN 61140
Virtually no influence from common-mode voltages: CMRR approx. 150 dB
Tremendous flexibility provided by
Calibrated switching of up to 16 input/output ranges
Up to 16 customer-specific measuring ranges
VariPower 20 V to 253 V AC/DC broad-range power supply
Reliable function even with unstable supply
No damage in the case of erroneous power connection
Switchable models minimize required device variants and save stockkeeping costs
Robust thanks to vacuum encapsulation
Mechanically stable for operation on ships, rail vehicles and land vehicles
The Task In electrical systems, alternating currents from 60 mV to 10 V need to be recorded, galvanically isolated and converted into standard 0...20 mA, 0...10 V or 4 ... 20 mA output signals. The DC output signal should reflect the rms values of the input voltage.
The Problems The alternating voltages which are used are not always sinusoidal, but sometimes distorted. But typical AC/DC transducers are only designed for sinusoidal sources. With input signals which are not sinusoidal, they exhibit – sometimes considerable – errors in forming the rms value, which can be severe enough to render the mea-surement values unusable. Therefore true rms measurement is required for signals which are non-sinusoidal and/or are distorted. In the case of insufficient insulation, high voltages and harsh ambient conditions may overload the galvanic isolation. This can result in false measurement values or even personal injury or damage to the equipment. These risks have to be eliminated safely and over the long term by suitably designed high voltage transducers.
The Solution The VariTrans P 41000 TRMS high voltage transducers have been specially conceived for measurements of bipolar voltages ranging from millivolts to volts. They reliably isolate high potentials at the input circuit. Thanks to the true rms conversion in the transducer, even distorted input signals are captured correctly and output as so-called true rms values.