The DVC 1000 series, designed to measure a nominal voltage of 1000 VRMS, utilizes an isolation amplifier that provides very high levels of isolation with a safety isolation voltage of 4.2 kV. This isolation amplifier offers significant space savings compared to other sensors of similar capacity that have bulky galvanic isolation units.
In addition to being highly robust, the DVC 1000 series also offers high levels of accuracy and temperature stability. An optional DIN rail mounting adapter facilitates integration into users' own applications.
LEM has developed the DVC 1000 to fully comply with IRIS (International Railway Industry Standards). Railway engineers working with rolling stock and substations can use these versatile new sensors to measure DC links, inverter output voltages, 4-quadrant converter input voltages, and battery voltage in light rail vehicles. The DVC 1000 voltage sensors' characteristics also make them ideal for a wide range of low- and medium-voltage measurements in industrial markets, such as monitoring DC power supplies, electric vehicle chargers, and battery storage.
The DVC 1000 sensors measure voltage by direct connection on their primary side through an internal resistive network and other components designed to introduce the signal into an isolation amplifier.
The isolated signal is recovered and conditioned to supply a voltage or current at the sensor's output connections, as an exact representation of the primary voltage. No other components are required; the connections are simply made between the voltage to be measured and the control device.
The DVC 1000 family can supply an instantaneous output current of +/- 30 mA (DVC 1000) or an output voltage of +/- 10 V (DVC 1000-B) for a peak voltage of +/- 1500 V. The DVC 1000-UI model supplies a unipolar instantaneous output current of 4-20 mA at 0…+1000 V DC (for measuring unipolar DC voltage only).
All models offer excellent overall accuracy of +/- 1% at +25°C with high temperature stability, allowing for an overall accuracy of
+/- 1.7% over a working temperature range of -40°C to +85°C.
The bandwidth of the measurement frequency (-3 dB point) is 35 kHz and the DVC 1000 models consume only 12 to 22 mA without primary voltage, depending on the model and the power supply used of +/- 15 to +/- 24 V for the DVC 1000 and DVC 1000-B models and a unipolar power supply of +15 to +24 V for the DVC 1000-UI model.
Thanks to its compact size and weight of only 57 g, the DVC 1000 series is unique in the market. Other notable features include compliance with various internationally recognized protection standards and adherence to IRIS specifications. They also stand out for their fast response time of 12 to 17 µs at 90% of nominal voltage.
The DVC 1000 models, designed by LEM in accordance with the latest applicable traction and industrial standards, use materials that meet all relevant fire and smoke requirements (EN 45545), which are mandatory in railway applications. They bear the CE mark and come with a five-year warranty, like all LEM sensors.
