LEM ITC series sensors open new precision indicators in locomotive traction current measurement

LEM ITC series sensors open new precision indicators in locomotive traction current measurement Key points:

● Accuracy meets the railway industry prEN 50463 standard ● Accuracy up to 0.5R with 4000A measurement current and excellent linearity ● Low power consumption closed-loop fluxgate technology ● Low temperature offset and gain drift ● Additional ( Test) The coil can be empty to verify that the device is operating properly

Beijing, China, November 28, 2011 – Recently, LEM, the world's leading manufacturer of power sensors, has released ITC series sensors for electrical isolation, high-precision current measurement in the field of railway traction, measurement of DC, AC and Pulse current established on the new standard.

The LEM's new sensor family consists of three models: ITC 1000-S, 2000-S and 4000-S, with corresponding rated current measurements of 1000, 2000 and 4000 ARMS. The ITC series designed by LEM for the railway-traction industrial unit can measure 0.5R, while the prEN 50463 standard requires on-board energy monitoring accuracy of 1R. The ITC series features a linearity error of less than 0.05% and an offset current of less than +/- 20μA.

The unprecedented accuracy of the railway-locomotive industry is on the one hand in order to maintain the best control of the traction motor, but the most important is the measurement of energy for financial purposes to record the use of energy, for example, to record the use of trains across regions. Electricity costs. This industry complies with the tentative standard pr EN 50463.

Accurate energy metering relies on highly accurate current and voltage measurements. LEM offers a full range of products that comply with the prEN 50463 standard, including high-precision voltage sensors such as the DV series (with optional 1R or 0.75R accuracy), energy meters EM4T, and ITC series current sensors.

LEM's measurement experts believe that Hall-effect measurement techniques do not provide the required accuracy. Therefore, we use closed-loop fluxgate technology instead of high-precision, linearity, low temperature drift, and elimination. Insertion loss. The ITC series sensors are insensitive to the position of the primary conductor inside the perforation and provide insulation test voltages up to 14 kVRMS/50 Hz/1 min with a very high instantaneous overcurrent capability (100kA for 100msec) and resistance to external disturbances (eg typical railroads) Magnetic field in the environment).

Current consumption ranges from less than 80 mA to +/-340 mA (full scale) with a +/- 24V DC supply. The ITC 4000-S has a bandwidth of 82 kHz (3 dB) and the sensor's perforated hole diameter allows insertion of a maximum conductor diameter of 102 mm (ITC 4000-S), 63 mm (ITC 2000-S). The test coil allows the ITC sensor to easily determine the status of the sensor with no current on the primary side.

The ITC series of sensors offered by LEM are not only integrated (ITC 4000-S model) but also separable (ITC 1000 and 2000-S models). The separable products include measuring heads and individually packaged measuring circuits. The measuring circuits are additionally encapsulated in metal housings. This helps to place the measuring head in a limited space, such as the top of a train.

The ITC sensor operating temperature range from –40 to +85°C meets or exceeds all relevant safety standards and railway operating environmental standards such as EN 50124-1 and EN 50155.

This high accuracy also makes ITC sensors ideally suited for a wider range of current measurement applications, especially where 0.5% accuracy is required and overload current exceeds 5% to 150% of rated value.

The ITC series sensors follow the CE standard and, like all LEM industrial sensors, offer a five-year warranty.