Authorized Distributor
?
closed loop
| Operating Temperature Range | −40 ... 80 °C |
| Isolation Test Voltage | 7.4 kV |
| RMS Voltage for AC Insulation Test (50 Hz, 1 min) Ud | 7.4 kV |
| Impulse Withstand Voltage (1.2/50 µs) UNi | 12.8 kV |
| Comparative Tracking Index (CTI) | 600 |
| RMS voltage for AC insulation test, 50 Hz, 1 min (Ud) | 7.4 kV |
Outdoor substations, Distribution transformer monitoring, Medium voltage isolated cable distribution, Underground substations, Pole-mounted transformers, Low voltage overhead lines, Distributions system equipment. Standards, IEC 61010-1:2010/AMD1: 2016; IEC 61010-2-32: 2012, IEC 61869-10: 2017, UL: 61010-1: 2012. Application Domains, Industrial, Smart Grid. Page 1/11 Route du Nant-d’Avril, 152 www.lem.com
The ARU-B100-D250/SP4 is a closed loop (compensated) current transducer from LEM.
Since it cannot saturate, very high and short-circuit currents are measured without degradation. Typical applications include Outdoor substations, Distribution transformer monitoring, Medium voltage isolated cable distribution and Underground substations.
Key characteristics from the official datasheet: operating temperature −40 ... 80 °C.
| General Information | |
|---|---|
| Manufacturer | LEM |
| Product Series | ARU |
| Product Reference | ARU-B100-D250/SP4 |
| Measurement | — |
| Mounting | Busbar Mount |
| Application Domain | Industrial, Smart Grid |
| Insulation Coordination | |
|---|---|
| RMS Voltage for AC Insulation Test (50 Hz, 1 min) Ud | 7.4 kV |
| Impulse Withstand Voltage (1.2/50 µs) UNi | 12.8 kV |
| Comparative Tracking Index (CTI) | 600 |
| RMS voltage for AC insulation test, 50 Hz, 1 min (Ud) | 7.4 kV |
| Impulse withstand voltage 1.2/50 μs (UNi) | 12.8 kV |
| (q Partial discharge RMS test voltage < 10 pC) m (Ut) | 1275 V |
| Clearance (pri. - sec.) (dCI) | > 16 mm |
| Creepage distance (pri. - sec.) (dCp) | > 16 mm |
| Case material | V0 |
| Application example - indoor use RMS voltage line-to-neutral | 1000 V |
| Application example - outdoor use RMS voltage line-to-neutral | 600 V |
| Environmental & Mechanical Characteristics | |
|---|---|
| Ambient Operating Temperature (TA) | −40 ... 80 °C |
| Ambient Storage Temperature (TA st) | −40 ... 80 °C |
| Mass (m) | 236 g |
| Relative humidity (non-condensing) (RH) | Min 0 / Max 90 % |
| Altitude above sea level | Max 2000 m |
| Mass 125 ⌀ (m) | Typ 236 g |
| Mass 175 ⌀ (m) | Typ 247 g |
| Mass 250 ⌀ (m) | Typ 277 g |
| Mass 300 ⌀ (m) | Typ 297 g |
| Standards & Certifications | |
|---|---|
| IEC 61010-1 | 2010/AMD1: 2016; IEC 61010-2-32: |
| IEC 61869-10 | Compliance |
| UL: 61010-1: 2012. | |
| Absolute Maximum Ratings | |
|---|---|
| Maximum secondary voltage (RMS) (USmax) | 30 V |
| Absolute Maximum Ratings | |
|---|---|
| Maximum primary conductor temperature (TBmax) | 105 °C |
| Electrical Data | |
|---|---|
| Rated short-time thermal current (Ith) | Typ 20 kA |
| Rated transformation ratio (kr) | Typ 10 kA/V |
| Rated frequency (fr) | Typ 50/60 Hz |
| Mutual inductance (M) | Typ 321.9 nH |
| M Temperature coefficient of (TCM) | Typ ±30 ppm/k |
| Coil inductance (LS) | Typ 1080 µH |
| Coil resistance (RS) | Typ 113 Ω |
| Ratio error (centered) (ε) | Min −0.5 / Max 0.5 % |
| Ratio error (all positions) (ε) | Min −1 / Max 1 % |
| Linearity error (εL) | Typ None % |
| Error due to magnetic field of external conductor current (εIext) | Min 0 / Typ ±0.4 / Max ±0.65 % |
Note: Specifications are taken from the official ARU-B100-D250/SP4 datasheet. Parameters that could not be confirmed from the datasheet are marked UNVERIFIED.
Official technical documentation for the ARU-B100-D250/SP4.
Outline dimensions, pin layout and connection diagrams of the ARU-B100-D250/SP4 are shown below.
| Outline Dimensions & Mechanical Data | |
|---|---|
| Mass | 236 g |
| Case material | V0 |
Note: All dimensions are in millimetres. Refer to the official datasheet for the complete dimension drawing.
Typical applications of the ARU-B100-D250/SP4.
The accuracy class characteristic diagram of the ARU-B100-D250/SP4 from the official datasheet is shown below.
| Accuracy & Dynamic Characteristics | |
|---|---|
| Maximum secondary voltage (RMS) (USmax) | 30 V |
| Mutual inductance (M) | Typ 321.9 nH |
| M Temperature coefficient of (TCM) | Typ ±30 ppm/k |
| Ratio error (centered) (ε) | Min −0.5 / Max 0.5 % |
| Ratio error (all positions) (ε) | Min −1 / Max 1 % |
| Linearity error (εL) | Typ None % |
| Reference Conditions | |
|---|---|
| Ambient Temperature (TA) | 25 °C, unless otherwise noted |
| Rated Frequency (fr) | Typ 50/60 Hz |
Note: For the full set of performance data, refer to the datasheet.
Other models of the ARU Series share the same measurement principle, mounting concept and output interface family.
