LF1010-S

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Document overview

• Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
• PDF pages: 7

Technical content

Features

• Bipolar and insulated current measurement up to 2.7 kA
• Current output
• Closed loop (compensated) current transducer
• Panel mounting. Advantages
• High accuracy
• Very low offset drift over temperature.

Applications

• Windmill inverters
• Test and measurement
• AC variable speed and servo motor drives
• Statics converters for DC motors drives
• Battery supplied applications
• Uninterruptible Power Supplies (UPS)
• Switched Mode Power Supplies (SMPS)
• Power supplies for welding applications. Standards
• EN 50178: 1997
• UL 508: 2010. Application Domain
• Industrial.

24August2015/Version 7 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice www.lem.com LF 1010-S Absolute maximum ratings Parameter Symbol Unit Value Maximum supply voltage (working) (−40 … 85 °C) ±UC V ±25.2 Primary conductor temperature TB °C 100 Maximum steady state primary current (−40 … 85 °C) IPN A 1000 Stresses above these ratings may cause permanent damage. Exposure to absolute maximum ratings for extended periods may degrade reliability. UL 508: Ratings and assumptions of certification File # E189713 Volume: 2 Section: 9 Standards

• USR indicates investigation to the Standard for Industrial Control Equipment UL 508.
• CNR indicates investigation to the Canadian standard for Industrial Control Equipment CSA C22.2 No. 14-13 Conditions of acceptability When installed in the end-use equipment, with primary feedthrough potential involved of 600 V AC/DC, consideration shall be given to the following: 1 - These products must be mounted in a suitable end-use enclosure. 2 - The secondary pin terminals have not been evaluated for field wiring. 3 - Low voltage control circuit shall be supplied by an isolating source (such as transformer, optical isolator, limiting impedance or electro-mechanical relay). 4 - Based on the temperature test performed on all Series, the primary bar or conductor shall not exceed 100 °C in the end use application. Marking Only those products bearing the UL or UR Mark should be considered to be Listed or Recognized and covered under UL’s Follow- Up Service. Always look for the Mark on the product.

24August2015/Version 7 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice www.lem.com LF 1010-S Insulation coordination Parameter Symbol Unit Value Comment Rms voltage for AC insulation test, 50 Hz, 1 min Ud kV 3.8 Impulse withstand voltage 1.2/50 µs ÛW kV 16 Insulation resistance RIS MΩ 200 measured at 500 V DC Comparative tracking index CTI 600 Application example 1000 V CAT III, PD2 Reinforced insulation, non uniform field according to EN 50178, IEC 61010 Application example 1000 V CAT III, PD2 Basic insulation, non uniform field according to EN 50178, IEC 61010 Case material - - V0 according to UL 94 Clearance and creepage See dimensions drawing on page 7 Environmental and mechanical characteristics Parameter Symbol Unit Min Typ Max Comment Ambient operating temperature TA °C −40 85 Ambient storage temperature TS °C −50 90 Mass m g 503

24August2015/Version 7 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice www.lem.com LF 1010-S Electrical data At TA = 25 °C, ±UC = ±24 V, RM = 1 Ω, unless otherwise noted. Lines with a * in the conditions column apply over the −40 … 85 °C ambient temperature range. Parameter Symbol Unit Min Typ Max Conditions Primary nominal rms current IPN A 1000 * Primary current, measuring range IPM A −2700 2700 * Measuring resistance RM Ω 0 * Max value of R M is given in figure 1 Secondary nominal rms current ISN A −0.2 0.2 * Resistance of secondary winding RS Ω 29.9 RS (TA) = RS × (1 + 0.004 × (TA + ∆temp−25)) Estimated temperature increase @IPN is ∆temp = 15 °C Secondary current IS A −0.54 0.54 * Number of secondary turns NS 5000 Theoretical sensitivity Gth mA/A 0.2 Supply voltage ±UC V ±14.25 ±25.2 * Current consumption IC mA 44 + IS 49 + IS ±UC = ±15 V ±UC = ±24 V Offset current, referred to primary IO A −1 1 Temperature variation of I O, referred to primary IOT A −0.6 0.6 * Magnetic offset current, referred to primary IOM A ±1 After 3 × IPN Sensitivity error εG % −0.15 0.15 * Linearity error εL % of IPN −0.15 0.15 * Overall accuracy at I PN XG % of IPN −0.2 −0.4 0.2 0.4 25 … 70 … 85 °C −40 … 85 °C Output rms current noise referred to primary Ino mA 50 1 Hz to 20 kHz (see figure 4) Reaction time @ 10 % of I PN tra µs < 0.5 0 to 1 kA, 200 A/µs Step response time to 90 % of I PN tr µs < 0.5 0 to 1 kA, 200 A/µs Frequency bandwidth BW kHz 200 −3 dB, small signal bandwidth (see figure 5) Definition of typical, minimum and maximum values Minimum and maximum values for specified limiting and safety conditions have to be understood as such as well as values shown in “typical” graphs. On the other hand, measured values are part of a statistical distribution that can be specified by an interval with upper and lower limits and a probability for measured values to lie within this interval. Unless otherwise stated (e.g. “100 % tested”), the LEM definition for such intervals designated with “min” and “max” is that the probability for values of samples to lie in this interval is 99.73 %. For a normal (Gaussian) distribution, this corresponds to an interval between −3 sigma and +3 sigma. If “typical” values are not obviously mean or average values, those values are defined to delimit intervals with a probability of 68.27 %, corresponding to an interval between −sigma and +sigma for a normal distribution. Typical, minimum and maximum values are determined during the initial characterization of the product.

24August2015/Version 7 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice www.lem.com LF 1010-S −130 −120 −110 −100 −90 −80 −70 −60 fc (Hz) eno (dBVrms/Hz1/2) rms Ino referred to primary (Arms) (Hz)fc Figure 1: Maximum measuring resistance IP RM max = NS × − RS max− 0.93 Ω UC min − 0.5 V Figure 3: Typical noise voltage density eno with RM = 100 Ω Figure 4: Typical total output current noise with RM = 100 Ω (primary referred, rms) To calculate the noise in a frequency band f1 to f2, the formula is: with Ino (f) read from figure 4 (typical, rms value). Example: What is the noise from 1 to 106 Hz? Figure 4 gives Ino (1 Hz) = 0.5 mA and Ino (106 Hz) = 199 mA. The output current noise (rms) is therefore: Ino (f1 … f 2) = Ino (f2)2 − Ino (f2)2 (199 × 10−3)2 − (0.5 × 10−3)2 = 199 mA referred to primary Figure 2: Typical step response (0 to 1 kA, 200 A/µs) 0 15 Time (µs) 30 45 Input 200 A/div Output 40 mA/div Typical performance characteristics 100 120 700 1000 1300 1600 1900 2200 2500 2800 RM max (Ω) IP (A)

22.8 V & 85 °C

14.25 V & 85 °C

24August2015/Version 7 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice www.lem.com LF 1010-S Mechanical characteristics

• General tolerance ±0.5 mm
• Transducer fastening
• Vertical position 2 holes ⌀ 5.3 mm
• 2 M5 steel screws
• Recommended fastening torque 3.2 N·m (±10 %)
• Or 4 holes ⌀ 4.2 mm
• 4 M4 steel screws
• Recommended fastening torque 2.1 N·m (±10 %)
• Primary through-hole ⌀ 38 mm
• Or 40 mm × 13 mm
• Transducer fastening
• Horizontal position 4 holes ⌀ 5.3 mm
• 4 M5 steel screws
• Recommended fastening torque 3.2 N·m (±10 %)
• Connection of secondary Molex 6410 Remarks
• IS is positive when IP flows in the direction of arrow.
• The secondary cables also have to be routed together all the way.
• Installation of the transducer is to be done without primary current or secondary voltage present.
• Maximum temperature of primary conductor: see page 2.
• This is a standard model. For different versions (supply voltages, turns ratios, unidirectional measurements...), please contact us
• Installation of the transducer must be done unless otherwise specified on the datasheet, according to LEM Transducer Generic Mounting Rules. Please refer to LEM document N°ANE120504 available on our Web site: Products/ Product Documentation. Safety This transducer must be used in limited-energy secondary circuits according to IEC 61010-1. This transducer must be used in electric/electronic equipment with respect to applicable standards and safety requirements in accordance with the manufacturer’s operating instructions. Caution, risk of electrical shock When operating the transducer, certain parts of the module can carry hazardous voltage (eg. primary connection, power supply). Ignoring this warning can lead to injury and/or cause serious damage. This transducer is a build-in device, whose conducting parts must be inaccessible after installation. A protective housing or additional shield could be used. Main supply must be able to be disconnected. Connection IP IS RM +UC −UC dCI dCp Dimensions (in mm)