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Closed loop (compensated) voltage transducer using the Hall effect
| Supply Voltage | ±15 V |
| Operating Temperature Range | −40 ... +85 °C |
| Isolation Test Voltage | 6 kV |
| Turns Ratio (NP/NS) | 1200 V : 10 V |
| Current Consumption (IC) | 32 + U S / R L mA |
| Frequency Bandwidth (BW) | @ U DC … 800 kHz |
Single or three phase inverters, Propulsion and braking choppers, Propulsion converters, Auxiliary converters, Battery chargers. Application Domain, Railway (fixed installations and onboard).
The CV 3-1200 is a closed loop (compensated) current transducer from LEM for the electronic measurement of voltages: DC, AC, pulsed..., with galvanic isolation.
It offers excellent accuracy, very good linearity, low temperature drift and wide frequency bandwidth. Typical applications include Single or three phase inverters, Propulsion and braking choppers, Propulsion converters and Auxiliary converters.
Key characteristics from the official datasheet: total error ±0.2 %; frequency bandwidth @ U DC … 800 kHz; operating temperature −40 ... +85 °C.
| General Information | |
|---|---|
| Manufacturer | LEM |
| Product Series | CV |
| Product Reference | CV 3-1200 |
| Nominal Primary Voltage | 1200 V |
| Supply Voltage | ±15 V |
| Measurement | voltages: DC, AC, pulsed... |
| Mounting | — |
| Application Domain | Railway (fixed installations and onboard) |
| Electrical Data — CV 3-1200 | |
|---|---|
| Turns Ratio (NP/NS) | 1200 V : 10 V |
| Supply Voltage (UC) | ±15 V |
| Current Consumption (IC) | 32 + U S / R L mA |
| Accuracy & Dynamic Performance | |
|---|---|
| Total Error (εtot) @ IPN | ±0.2 % |
| Frequency Bandwidth (BW) | @ U DC … 800 kHz |
| Insulation Coordination | |
|---|---|
| RMS Voltage for AC Insulation Test (50 Hz, 1 min) Ud | 6 kV |
| Creepage Distance (dCp) | 83.8 mm |
| Clearance (dCI) | 76.4 mm |
| Comparative Tracking Index (CTI) | 600 |
| Environmental & Mechanical Characteristics | |
|---|---|
| Ambient Operating Temperature (TA) | −40 ... +85 °C |
| Ambient Storage Temperature (TA st) | −45 ... +90 °C |
| Mass (m) | 560 g |
| Case Material | Insulating plastic case recognized according to UL 94-V0. |
| General Tolerance | ±0.3 mm |
| Standards & Certifications | |
|---|---|
| EN 50155 | 2007 |
| EN 50121-3-2 | Compliance |
Note: Specifications are taken from the official CV 3-1200 datasheet. Parameters that could not be confirmed from the datasheet are marked UNVERIFIED.
Official technical documentation for the CV 3-1200.
Outline dimensions, pin layout and connection diagrams of the CV 3-1200 are shown below.
| Outline Dimensions & Mechanical Data | |
|---|---|
| General Tolerance | ±0.3 mm |
| Mass | 560 g |
| Case Material | Insulating plastic case recognized according to UL 94-V0. |
Note: All dimensions are in millimetres. Refer to the official datasheet for the complete dimension drawing.
Typical applications of the CV 3-1200.
Characteristic curve diagrams are not included in the CV 3-1200 datasheet; the relevant characteristics are the accuracy and dynamic performance data listed below.
| Accuracy & Dynamic Characteristics | |
|---|---|
| Total Error (εtot) @ IPN | ±0.2 % |
| Frequency Bandwidth (BW) | @ U DC … 800 kHz |
Note: For the full set of performance data, refer to the datasheet.
Other models of the CV3 Series share the same measurement principle, mounting concept and output interface family.
