Use VT7 and VT8 AC / DC Voltage Transducers allow isolation and conditioning of ac and dc voltages, converting to rms, mean or instantaneous outputs. The VT7 and VT8 series voltage transducers are designed to measure AC+DC and AC voltage in 1 phase, split phase and 3 phase systems. They convert the input voltage signal to an isolated DC output that is directly proportional to the input rms voltage. The VT8 models are RMS calibrated voltage transducers, with 0-1mA, 4-20mA (4mA live zero), voltage 0-5V or 0-10V outputs. Auxiliary power is required to ensure that the output signal is present even when the inputs are close to zero - which is a key benefit of instrument powered (externally powered) transducers.
Because the VT8 is true RMS sensing and RMS calibrated, it allows measurement of distorted waveforms of up to 9th harmonic with a crest factor of 5. Both the VT7 and VT8 are typically used in voltage measurement where distorted voltage waveforms are common, such as pump speed controllers, fan speed controllers, motor VFD controllers, UPS and thyristor drives. These units are also used to measure voltage in energy management systems, switchboards, generator and telemetery controls. Isolation of 2.5kV is provided between the input and output signal, allowing the output to be fed to PLC computer systems and even conventional analogue meters
The Model VT7 Series dc voltage transducer produces an output which is directly proportional to the input from dc to 10kHz. It functions as a millivolt dc shunt isolator or a high voltage isolator to 1000V
The Model VT8 Series (RMS) ac voltage transducer provides a dc output directly related to the true RMS or mean value of the input over a dc to 10kHz frequency range. Inputs range span from 50mV to 1000V. Input/output dielectric test is 2500Vac. Consult factory for special ranges
Exmple: 0-50mVdc Input with 4-20mAdc Output and 125Vdc Instr. Pwr.
Exmple: 0-100Vac Input with 0-10Vdc Output and 115Vac Instr. Pwr.
Option "-11" 95-135Vac, 50/60Hz, 5VA
Option "-22" 230Vac, 50/60Hz, 5VA, ±15%
Option "-12, -15, -24, -37, -48", 150mA max., 12Vdc thru 48Vdc, ±10%