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Closed loop (compensated)
| Primary Current, Measuring Range | −150 ... 150 A |
| Output Voltage Range | 4.625 V |
| Supply Voltage | 4.75 ... 5.25 V |
| Accuracy @ IPN | 3.4 % of IPN |
| Operating Temperature Range | −40 ... 85 °C |
| Isolation Test Voltage | 4.2 kV |
AC variable speed and servo motor drives, Static converters for DC motor drives, Battery supplied applications, Uninterruptible Power Supplies (UPS), Switched Mode Power Supplies (SMPS), Power supplies for welding applications.
The CAS 50-NP is a closed loop (compensated) current transducer from LEM for the electronic measurement of current: DC, AC, pulsed..., with galvanic isolation.
Typical applications include AC variable speed and servo motor drives, Static converters for DC motor drives, Battery supplied applications and Uninterruptible Power Supplies (UPS).
Key characteristics from the official datasheet: linearity error −0.1 ... 0.1 % of IPN; frequency bandwidth 200 kHz; operating temperature −40 ... 85 °C.
| General Information | |
|---|---|
| Manufacturer | LEM |
| Product Series | CAS |
| Product Reference | CAS 50-NP |
| Primary Nominal Current | 50 A |
| Supply Voltage | 4.75 ... 5.25 V |
| Measurement | current: DC, AC, pulsed... |
| Mounting | PCB Mount |
| Application Domain | Industrial |
| Electrical Data — CAS 50-NP | |
|---|---|
| Primary Nominal RMS Current (IPN) | 50 A |
| Primary Current, Measuring Range (IPM) | −150 ... 150 A |
| Supply Voltage (UC) | 4.75 ... 5.25 V |
| Current Consumption (IC) | 15 ... 20 mA |
| Accuracy & Dynamic Performance | |
|---|---|
| Accuracy @ IPN | 3.4 % of IPN |
| Linearity Error (εL) | −0.1 ... 0.1 % of IPN |
| Electrical Offset Voltage (VO E) @ IP = 0 | −5.8 ... 5.8 mV |
| Response Time to 90 % of IPN Step | 0.3 µs |
| Frequency Bandwidth | 200 kHz |
| Insulation Coordination | |
|---|---|
| RMS Voltage for AC Insulation Test (50 Hz, 1 min) Ud | 4.2 kV |
| Impulse Withstand Voltage (1.2/50 µs) UNi | 7.6 kV |
| Creepage Distance (dCp) | 7.7 mm |
| Clearance (dCI) | 7.7 mm |
| Comparative Tracking Index (CTI) | 600 |
| Environmental & Mechanical Characteristics | |
|---|---|
| Ambient Operating Temperature (TA) | −40 ... 85 °C |
| Ambient Storage Temperature (TA st) | −55 ... 105 °C |
| Mass (m) | 9 g |
| Standards & Certifications | |
|---|---|
| EN 50178 | Compliance |
| UL 508 | Compliance |
| IEC 61010 | -1: 2010. |
Note: Specifications are taken from the official CAS 50-NP datasheet. Parameters that could not be confirmed from the datasheet are marked UNVERIFIED.
Official technical documentation for the CAS 50-NP.
Outline dimensions, pin layout and connection diagrams of the CAS 50-NP are shown below.
| Outline Dimensions & Mechanical Data | |
|---|---|
| Mass | 9 g |
Note: All dimensions are in millimetres. Refer to the official datasheet for the complete dimension drawing.
Typical applications of the CAS 50-NP.
The characteristic curves of the CAS 50-NP from the official datasheet are shown below.
| Accuracy & Dynamic Characteristics | |
|---|---|
| Accuracy @ IPN | 3.4 % of IPN |
| Linearity Error (εL) | −0.1 ... 0.1 % of IPN |
| Response Time to 90 % of IPN Step | 0.3 µs |
| Frequency Bandwidth | 200 kHz |
Note: Refer to the datasheet for the complete set of characteristic curves.
Other models of the CAS CASR CKSR share the same measurement principle, mounting concept and output interface family.
