DVL 500
500V rated true RMS voltage transducer with 0.5% accuracy for power monitoring and metering applications
Product Overview
Description
The DVL 500 is a high-precision true RMS voltage transducer designed for AC voltage monitoring and power metering applications. Unlike instantaneous voltage transducers, the DVL 500 calculates and outputs the true RMS value of the input voltage, providing accurate measurement regardless of waveform distortion.
Featuring 0.5% accuracy, 2.5kV isolation, and DC voltage output proportional to RMS input, the DVL 500 is ideal for power quality monitoring, energy management systems, and industrial metering. The sensor handles input frequencies from DC to 100Hz and maintains accuracy even with distorted waveforms containing harmonics.
The DVL 500 is widely deployed in applications such as grid monitoring, generator set control, building energy management, and industrial power distribution systems where accurate voltage measurement is essential for billing, protection, or control purposes.
Product Series
DVL
Primary Application
Voltage Transducers
Key Features
- High efficiency and reliability
- Optimized for industrial applications
- Comprehensive technical support
- Available from stock
Specifications
| Rated Voltage | 500V AC |
|---|---|
| Measurement Range | 50-500V AC |
| Supply Voltage | ±12V to ±24V |
| Output Type | DC Voltage (RMS) |
| Accuracy | ±0.5% |
| Response Time | 300 ms |
| Frequency Range | DC to 100 Hz |
| Isolation Voltage | 2.5 kV |
| Operating Temperature | -10°C to +55°C |
Applications
Motor Drives
Variable frequency drives and servo motor controls
Power Supplies
SMPS, UPS, and industrial power systems
Renewable Energy
Solar inverters and wind turbine converters
EV Charging
Electric vehicle charging stations
FAE Expert Insights
"DVL 500 is an excellent choice for industrial applications."
— Field Application Engineer, BeiLuo
Frequently Asked Questions
What is true RMS measurement and why is it important?
True RMS (Root Mean Square) measurement calculates the effective heating value of an AC waveform, regardless of its shape. For a pure sine wave, average-responding and true RMS meters give the same result. However, for distorted waveforms (common with VFDs, switching supplies, LED drivers), average-responding meters can have significant errors (20-50% or more). True RMS sensors like DVL 500 use computational methods to accurately measure the actual RMS value. This is critical for: 1) Accurate power billing and energy measurement; 2) Proper sizing of electrical equipment; 3) Power quality analysis; 4) Compliance with IEEE and IEC standards. Any application involving non-linear loads should use true RMS measurement.
Use DVL 500 for any AC voltage measurement where the waveform may be distorted (VFD outputs, switching power supplies, non-linear loads). For pure sine wave applications, average-responding sensors may be acceptable, but true RMS provides safety margin.
Why is the DVL 500 response time 300ms?
The 300ms response time of DVL 500 is inherent to true RMS calculation. RMS is defined over a complete cycle of the waveform (or multiple cycles for accuracy). At 50Hz, one cycle is 20ms; at 60Hz, it's 16.7ms. To achieve stable 0.5% accuracy, the sensor averages over multiple cycles - typically 10-20 cycles, resulting in 200-400ms response time. This is a fundamental trade-off: accurate RMS measurement requires time to collect and process waveform data. For applications requiring faster response (protection, fast control), use instantaneous output sensors like LV series. The DVL 500 is designed for monitoring and metering where accuracy is more important than speed.
The 300ms response is suitable for monitoring and metering applications. For protection applications requiring fast response (<100ms), use instantaneous output sensors like LV series instead of RMS sensors.
Can DVL 500 measure DC voltage?
Yes, the DVL 500 can measure DC voltage and provides a DC output proportional to the DC input level. The DC measurement accuracy is typically the same as AC (0.5%). This dual AC/DC capability makes the DVL 500 versatile for applications with mixed AC and DC measurements, such as UPS systems, battery monitoring, and systems with rectified supplies. When measuring DC, the response time is typically faster than for AC since no cycle averaging is needed. The frequency specification (DC to 100Hz) confirms DC measurement capability. For pure DC applications where RMS calculation is unnecessary, an instantaneous sensor like LV 25-P may be more cost-effective.
DVL 500 can measure DC, but for pure DC applications, LV 25-P is more cost-effective. Use DVL 500 for DC only when you need the same sensor to handle both AC and DC measurements (e.g., UPS battery monitoring with AC input/DC output).