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AC Current Transducer
| Supply Voltage | (loop-powered) +15.2 … 30 V DC |
| Operating Temperature Range | −20 … +60 °C A |
| Isolation Test Voltage | 3.5 kV |
| RMS Voltage for AC Insulation Test (50 Hz, 1 min) Ud | 3.5 kV |
| Creepage Distance (dCp) | 6 mm |
| Clearance (dCI) | 6 mm |
Cost-effective solution, Easy installation, • Automation Easy installation and Supervision Applications Current measurement for process Applications regulation by distributed PLCs or, ● AAuuttoommaattiioonn remote control (e.g. aanndd SCADA SSuuppeervrvisisioionn CCuurrrreenntt software) mmeeaassuurreemmeennt tf ofor rp prorocecsess s rreegguullaattiioonn bbyy ddiissttrribibuutetedd PLLCCs s Load monitoring for protection oorr rreemmoottee ccoonnttrrooll ((ee.g.g. .S SCCAADDAA systems and predictive ssooffttwwaarree)) maintenance (e.g. conveyers,, ● SSaaffeettyy aanndd CCoonnddiittiioonn pumps or HVAC motors) MMoonniittoorriinngg Load monitoring for protection Load monitoring for protection Convenient connection to power systems and predictive systems consumption and sub-meters predictive pumps or HVAC motors) Application pumps or HVAC domain motors), Energy management, Energy management Convenient connection to power Convenient connection to power consumption sub-meters consumption sub-meters.
The AT 20 B420L is a None current transducer from LEM.
Typical applications include Cost-effective solution, Easy installation, • Automation Easy installation and Supervision Applications Current measurement for process Applications regulation by distributed PLCs or and ● AAuuttoommaattiioonn remote control (e.g. aanndd SCADA SSuuppeervrvisisioionn CCuurrrreenntt software) mmeeaassuurreemmeennt tf ofor rp prorocecsess s rreegguullaattiioonn bbyy ddiissttrribibuutetedd PLLCCs s Load monitoring for protection oorr rreemmoottee ccoonnttrrooll ((ee.g.g. .S SCCAADDAA systems and predictive ssooffttwwaarree)) maintenance (e.g. conveyers.
Key characteristics from the official datasheet: operating temperature −20 … +60 °C A.
| General Information | |
|---|---|
| Manufacturer | LEM |
| Product Series | AT |
| Product Reference | AT 20 B420L |
| Supply Voltage | (loop-powered) +15.2 … 30 V DC |
| Measurement | — |
| Mounting | — |
| Application Domain | without prior notice |
| Electrical Data — AT 20 B420L | |
|---|---|
| Supply Voltage (UC) | (loop-powered) +15.2 … 30 V DC |
| Insulation Coordination | |
|---|---|
| RMS Voltage for AC Insulation Test (50 Hz, 1 min) Ud | 3.5 kV |
| Creepage Distance (dCp) | 6 mm |
| Clearance (dCI) | 6 mm |
| Comparative Tracking Index (CTI) | 600 |
| Overvoltage Category / Pollution Degree | Over voltage category CAT · Pollution degree PD2 |
| Environmental & Mechanical Characteristics | |
|---|---|
| Ambient Operating Temperature (TA) | −20 … +60 °C A |
| Ambient Storage Temperature (TA st) | - 20 .. + 85 ° |
| Mass (m) | 90 g |
Note: Specifications are taken from the official AT 20 B420L datasheet. Parameters that could not be confirmed from the datasheet are marked UNVERIFIED.
Official technical documentation for the AT 20 B420L.
Outline dimensions, pin layout and connection diagrams of the AT 20 B420L are shown below.
| Outline Dimensions & Mechanical Data | |
|---|---|
| Mass | 90 g |
Note: All dimensions are in millimetres. Refer to the official datasheet for the complete dimension drawing.
Typical applications of the AT 20 B420L.
Characteristic curve diagrams are not included in the AT 20 B420L datasheet; the relevant characteristics are the accuracy and dynamic performance data listed below.
Note: For the full set of performance data, refer to the datasheet.
Other models of the AT Series share the same measurement principle, mounting concept and output interface family.
