Verivolt IsoBlock V-3P | Three-Phase Voltage Sensor
Measures three-phase voltages with galvanic isolation and routes the signals to the DAQ in one bundle – reducing wiring in compact test setups.
- ✓ Input Voltage: 150–1000 VAC
- ✓ Bandwidth: up to 100 kHz
- ✓ Accuracy: up to 0.1%
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Galvanically Isolated Differential Voltage Sensor
Verivolt IsoBlock V-3P: Four-Channel Three-Phase Voltage Measurement up to 1000 VAC
The Verivolt IsoBlock V-3P Series is designed for galvanically isolated voltage measurements in three-phase systems. Depending on the version, the four-channel differential voltage sensor covers input measurement ranges from 150 VAC to 1000 VAC. The bandwidth is up to 100 kHz, with accuracy of up to 0.1% depending on the version.
Measure Phase-to-Phase and Phase-to-Neutral Voltages
The IsoBlock V-3P measures voltages in three-phase systems including the neutral conductor. In a delta configuration, phase-to-phase voltages can be output; in a star or wye configuration, phase-to-neutral voltages can be output. This makes the three-phase voltage sensor suitable for multi-channel voltage measurement in electrical three-phase systems.
Galvanic Isolation for Differential Voltage Measurements
Each channel provides galvanic isolation between input and output as well as its own isolated reference. This helps decouple high common-mode voltages from the downstream measurement system. Common-mode rejection is 112 dB at 60 Hz. An input protection stage also protects the sensor against transient overvoltages.
Scaled Output Signal for DAQ Systems
The IsoBlock V-3P operates as a differential divider network and generates a 7 VAC scaled version of the input signal. An anti-aliasing filter is integrated into the signal conditioning stage. The differential output signal can then be processed by suitable data acquisition systems and DAQs.
Alternative Products
If you only require one galvanically isolated measurement channel and more flexible measurement ranges up to 1.5 kV, we recommend the Verivolt IsoBlock V-1c Series. Do you need significantly higher bandwidth for fast transients or PWM signals? Then the Verivolt IsoBand V Series with up to 8 MHz bandwidth and measurement ranges up to 2000 V is a suitable alternative.Related Product Categories
Signal Amplifiers | TransducersWhich IsoBlock V-3P model is right for your measurement application?
The measurement range, accuracy, and integration into the data acquisition system determine the appropriate configuration. We’ll help you select the right IsoBlock V-3P for your three-phase and differential voltage measurements.
Variants
Specifications
| Input Measurement Ranges | ±150 VAC, ±250 VAC, ±500 VAC, ±700 VAC or ±1000 VAC |
|---|---|
| Channels | 4 |
| Galvanic Isolation | 3-way isolation |
| Accuracy | ±(0.2% of reading + 0.005% of range) or ±(0.1% of reading + 0.005% of range) |
| Bandwidth (-3 dB) | DC to 100 kHz |
| Common-Mode Rejection at 60 Hz | 112 dB |
| Primary-to-Secondary Isolation Voltage | > ±1500 V |
| Maximum Common-Mode Transient Voltage | 5000 V for 1 minute |
| Maximum Differential-Mode Transient Voltage | 2000 V at 65 °C |
| Output Voltage | 7 VAC |
| Output | Differential signal pair |
| Differential Divider Network | With anti-aliasing filter at the output and a scaled 7 VAC output signal |
| Isolated Reference | Separate isolated reference for each input channel |
| Differential Input Impedance | 8 MΩ |
| Input-to-Output Non-Linearity | < 0.04% |
| Maximum Phase Shift at 60 Hz | < 0.05° |
| Maximum Through Delay | 3.8 µs |
| Insulation Impedance | > 10 GΩ || 2 pF |
| Output Impedance | 20 Ω |
| Supply Voltage | 12 to 28 V |
| Connection Type | Spring-cage terminals |
| Mounting | DIN rail |
| Operating Temperature | -25 to 70 °C |
| Storage Temperature | -40 to 80 °C |
| Weight | 198 g |
| Plug-and-Play | Easy reconfiguration for different measurement tasks |
Options & Accessories
| NIST calibration for accuracy |
Scope of Delivery
| IsoBlock V-3P Series unit(s) |
Applications
| Three-Phase Power Monitoring | Voltage measurement in three-phase systems |
|---|---|
| Grid-Tied Inverter Testing | Galvanically isolated measurement of three-phase input and output voltages |
| Motor Drive Measurements | Voltage measurement at the inputs and outputs of frequency converters and motor drives |
| Power Quality Analysis | Measurement of three-phase voltages for power quality testing |
| Delta and Wye Systems | Phase-to-phase measurements in delta configurations and phase-to-neutral measurements in wye configurations |
| DAQ-Based Measurement Systems and Test Benches | Transfer of differential output signals to computer-based data acquisition systems |
Links & Downloads
Available Documents (Subject to Change)
Supplier
Verivolt Sensors and Measurement Solutions for Electrical Quantities
Measure Voltage and Current Across Different Potentials
Verivolt develops voltage and current sensors as well as galvanically isolated transducers for measurement tasks in power electronics, test systems, and high-voltage applications. The portfolio includes single- and multi-channel measurement modules from the IsoBlock and IsoBand families for voltage, current, and differential voltage measurements.
IsoBlock and IsoBand for Different Measurement Tasks
Depending on the product family, measurement range, galvanic isolation, bandwidth, and output signal vary. Many IsoBlock and IsoBand modules are designed for DIN-rail mounting. Depending on the sensor, measurement ranges extend from low currents to high-current applications and from low differential voltages into the kilovolt range.
Integrate Measurement Signals into DAQ Systems and Test Setups
For connection to data acquisition systems (DAQ), digitizers, and other measurement equipment, many Verivolt transducers provide scaled analog output signals. Galvanically isolated channels support measurements at different ground and common-mode potentials and simplify the design of multi-channel measurement systems.
Applications in Power Electronics, Battery Systems, and High Voltage
Typical applications include battery and energy storage systems, fuel cells, EV charging systems, variable frequency drives, motors, photovoltaics, and power electronics. For specialized applications, Verivolt also offers the IsoBlock Q-4c, a galvanically isolated signal amplifier for quench detection in superconducting magnets.
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