LDSR 0.3-TP/SP1

Current Transducer LDSR 0.3-TP/SP1 IP R N = 300 mA For the electronic measurement of current: DC, AC, pulsed..., with galvanic separation between the primary and the secondary circuit. Features Applications ●● Closed loop (compensated) current transducer ●● Leakage current measurement in transformerless PV inverters ●● Voltage output ●● First human contact protection of PV arrays ●● Single supply voltage ●● PCB mounting. ●● Failure detection in power sources Special feature ●● Current leakage detection in stacked DC sources ●● Symmetrical fault detection ●● Single phase nominal current measurement up to ±35 A per wire (DC or AC). ●● Dedicated primary PCB. Advantages ●● Very low offset drift temperature coefficient ●● High overload capability ●● EN 61800-1: 1997 ●● EN 61800-2: 2015 ●● High insulation capability ●● Reference pin with two modes, Ref IN and Ref OUT ●● Test winding. Standards ●● EN 61800-3: 2004 ●● UL 62109-1: 2010 ●● IEC 61010-1: 2010 ●● UL 508. Application Domain ●● Industrial. N° 97.N7.A2.001.0 26February2019/version 1 Page 1/11 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice LEM International SA Chemin des Aulx 8 1228 PLAN-LES-OUATES Switzerland www.lem.com LDSR 0.3-TP/SP1 Absolute maximum ratings Parameter Symbol Unit Value Maximum supply voltage UC max V 7 Maximum primary conductor temperature TB max °C 110 Maximum withstand primary peak current ÎP A 3300 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: 11 Standards ●● CSA C22.2 NO. 14-10 INDUSTRIAL CONTROL EQUIPMENT - Date 2011/08/01 ●● UL 508 STANDARD FOR INDUSTRIAL CONTROL EQUIPMENT - Date 2013 Ratings Parameter Symbol Primary involved potential Unit Value V RMS 300 Maximum surrounding air temperature TA °C 105 Primary current IP A 35 Secondary supply voltage UC V DC 5 Output voltage Uout V 0 to 5 Conditions of acceptability When installed in the end-use equipment, consideration shall be given to the following: 1 - These devices must be mounted in a suitable end-use enclosure. 2-T  he terminals have not been evaluated for field wiring. 3 - The LDSR xx-TP Series shall be used in a pollution degree 2 environment or better. 4-L  ow voltage circuits are intended to be powered by a circuit derived from an isolating source (such as a transformer, optical isolator, limiting impedance or electro-mechanical relay) and having no direct connection back to the primary circuit (other than through the grounding means). 5-T  hese devices are intended to be mounted on the printed wiring board of the end-use equipment (with a minimum CTI of 100). 6-L  DSR xx-TP Series: based on results of temperature tests, in the end-use application, a maximum of 110°C cannot be exceeded on the primary jumper. Marking Only those products bearing the UL or UR Mark should be considered to be Listed or Recognized and covered under UL’s FollowUp Service. Always look for the Mark on the product. Page 2/11 26February2019/version 1 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice LEM International SA Chemin des Aulx 8 1228 PLAN-LES-OUATES Switzerland www.lem.com LDSR 0.3-TP/SP1 Insulation coordination Parameter Symbol Unit Value RMS voltage for AC insulation test, 50 Hz, 1 min Ud kV 1.71 Impulse withstand voltage 1.2/50 μs UNi kV 4 Partial discharge RMS test voltage (qm < 10 pC) Ut V 990 Clearance (pri. - sec.) dCI Creepage distance (pri. - sec.) dCp Case material - mm Application example According to 62109-1 See outline drawing in page 10 - V0 CTI Comparative tracking index Comment According to UL 94 600 V Basic insulation according to UL 62109, CAT III, PD2 300 Environmental and mechanical characteristics Parameter Symbol Unit Min Ambient operating temperature TA °C −40 105 Ambient storage temperature TS °C −50 105 Mass m g Typ Max Comment 25 Page 3/11 26February2019/version 1 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice LEM International SA Chemin des Aulx 8 1228 PLAN-LES-OUATES Switzerland www.lem.com LDSR 0.3-TP/SP1 Electrical data At TA = 25 °C, UC = +5 V, unless otherwise noted (lines with * in the condition column apply over the ambient temperature range). See Min, Max, typ. definition paragraph in page 6. Parameter Unit Primary nominal residual RMS current IP R N mA Primary residual current, measuring range IP R M mA −900 Supply voltage UC V 4.75 Current consumption IC mA Internal voltage reference UI ref V Internal voltage source current reference II ref µA UE ref V - mA IO E mA −40 TCIO E mA/°C −0.40 Magnetic offset after 1000 × IP N IO M mA 8 Nominal sensitivity SN V/A 2.22 Sensitivity error εS % TCS ppm/K Linearity error εL % of IP R N RMS noise current 1 Hz … 2 kHz referred to primary Ino mA 7.5 Delay time @ 10 % of IP N tD 10 µs 25 For RL > 500 kΩ; di/dt = 3 mA/µs Delay time @ 90 % of IP N tD 90 µs 300 For RL > 500 kΩ; di/dt = 3 mA/µs Start-up time tstart ms 220 Frequency bandwidth (−3 dB) BW kHz 2 Error ε mA −40 40 Error @ 30 mA ε mA −8 8 For ±30 mA instantaneous DC jump Error @ 60 mA ε mA −12 12 For ±60 mA instantaneous DC jump Error @ 150 mA ε mA −20 20 For ±150 mA instantaneous DC jump External voltage reference Current to force a voltage external reference Electrical offset current referred to primary Temperature coefficient of IO E @ IP = 0 A Temperature coefficient of S Degauss time Degauss pin input voltage Min * Symbol Typ Max 300 2.485 Comment * 900 * 5 5.25 * 18 20.5 2.5 2.515 +IP (mA)/NS with NS = 40 turns 400 2.25 2.75 1.5 40 ±0.17 −2 0.40 For RL > 500 kΩ 2 ±250 −3 ms 3 For RL > 500 kΩ * Without initial offset 120 IN Low V 1.62 IN High V 3.42 Pulse duration ms 0.6 Page 4/11 26February2019/version 1 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice LEM International SA Chemin des Aulx 8 1228 PLAN-LES-OUATES Switzerland www.lem.com LDSR 0.3-TP/SP1 Performance parameters definition Transducer simplified model Degauss The static model of the transducer at temperature TA is: A rising edge on the “Degauss” pin will initiate the degauss cycle. During the cycle the output Uout does not carry relevant information. Uout = S⋅IP + ε In which ε = UO E + UO T (TA) + εS ⋅IP⋅S + εL (IP R M) ⋅ IP R M⋅S + TCS⋅(TA−25)⋅IP⋅S With: IP R M max Uout TA UO E UO T (TA) S TCS : max primary residual measuring range applied to the transducer : output voltage (V) : ambient operating temperature (°C) : electrical offset voltage (V) : temperature variation of UO at temperature TA (°C) : sensitivity of the transducer (V/At) : temperature coefficient of S εS : sensitivity error εL(IP R M ) : linearity error for IP R M max Notes: 1) a degauss cycle is automatically initiated at power up 2) the “Degauss” pin is provided with a 10 kΩ pull down resistor and can be left unconnected. The figure below describes the expected output during a degauss cycle. This model is valid for primary ampere-turns IP between −IP R M and +IP R M only. Magnetic offset Pre-conditioning Before any test measure the transducer is pre conditioned by applying calibrated differential current cycles. The magnetic offset current IO M is the consequence of a current on the primary side (“memory effect” of the transducer’s ferromagnetic parts). It is measured using the following primary current cycle. IO M depends on the current value IP1 (IP1 > IP M). IO M = IS (t1) − IS (t2) 2 · 1 S IP (DC) IP N 0A −IP1 t Figure 1: Pre-conditioning differential current cycles Sensitivity and linearity t2 t1 Ip(3) Ip(t 3) Figure 2: C  urrent cycle used to measure magnetic and electrical offset (transducer supplied) To measure sensitivity and linearity, the primary current (DC) is cycled from 0 to IP R M then to −IP R M and back to 0 (equally spaced IP R M/10 steps). The sensitivity S is defined as the slope of the linear regression line for a cycle between ±IP R N The linearity error εL is the maximum positive or negative difference between the measured points and the linear regression line, expressed in % of IP R M. Page 5/11 26February2019/version 1 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice LEM International SA Chemin des Aulx 8 1228 PLAN-LES-OUATES Switzerland www.lem.com LDSR 0.3-TP/SP1 Performance parameters definition Electrical offset Total error The electrical offset current IO E can either be measured when the ferro-magnetic parts of the transducer are: The total error εtot is the error at ± IP N, relative to the rated value ●● completely demagnetized, which is difficult to realize, ●● or in a known magnetization state, like in the current cycle shown in figure number. Using the current cycle shown in figure ..., the electrical offset is: Iout (t1) + Iout (t2) IO E = 2 The temperature variation T) the − IO Eelectrical (25° C) offset current IO T (T) = IIOO TE (of (t1)electrical + Iout (t2offset ) Ioutthe IO E is the variation of from 25 °C to the I = considered temperature: OE 2 IO T (T) = IO E (T) − IO E (25° C) Note: the transducer has to be demagnetized prior to the application of the current cycle (for example with a demagnetization tunnel). IP N. It includes all errors mentions above: ●● the electrical offset IO E ●● the magnetic offset IO M ●● the sensitivity error εS ●● the linearity error εL (to IP N) Delay times The delay time tD 10 @ 10 % and the delay time tD 90 @ 90 % are shown in figure 3. Both depend on the primary current di/dt. They are measured at nominal current. I 100 % 90 % Uout IP tD 90 10 % tD 10 t Figure 3: tD 10 (delay time @ 10 %) and tD 90 (delay time @ 90 %) Page 6/11 26February2019/version 1 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice LEM International SA Chemin des Aulx 8 1228 PLAN-LES-OUATES Switzerland www.lem.com LDSR 0.3-TP/SP1 Application information Decoupling supply voltage UC (5 V): RCM transducers are already provided with internal decoupling capacitors. Depending on the design it is advisable to add an external decoupling: 1 µF or more. If fast differential current surges are to be expected the decoupling capacitor should be increased in order to absorb the energy from internal protection diodes. In this case the capacitor should be increased to more than 10 µF. Protection of test winding: If fast differential current surges are to be expected, the circuit connected to the test winding shall be protected to absorb the energy coupled from the primary surge. Load on Uout: The maximum Uout is 10 mA. The load on this output should be adapted to not exceed this current. Decoupling reference Uref: The maximum decoupling capacitor value is 47 nF. Output Uout properties: The output is a direct Opamp output. The output current is limited to 10 mA. Using an external reference voltage: If the Uref pin of the transducer is not used it could be either left unconnected or filtered according to the previous paragraph “Reference Uref”. If an external voltage reference is used its source capability must be at least 1.5 mA. 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, maximal and minimal values are determined during the initial characterization of the product. Page 7/11 26February2019/version 1 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice LEM International SA Chemin des Aulx 8 1228 PLAN-LES-OUATES Switzerland www.lem.com LDSR 0.3-TP/SP1 Primary nominal residual current and primary nominal current The primary nominal residual current is the sum of the instantaneous values of all currents flowing through the primary circuit of the transducer. The presence of a primary nominal current DC or AC may lead to an additional uncertainty. For example, with a primary nominal current of 35 A the uncertainty is typically 1.2 % of the primary nominal residual current (1.2 % of 300 mA giving 3.6 mA). Test LDSR transducer Twenty turns are available on the magnetic core in order to perform tests. The current is limited to 50 mA. PCB footprint according to the product Note: the dimension of customer PCB tracks (width & thickness) and the LEM transducer’s primary PCB are linked and can influence on each other temperature heating. Assembly on PCB ●● Recommended PCB hole diameter ⌀ 2.9 mm for primary pin ⌀ 1 mm for secondary pin ●● Maximum PCB thickness 2.4 mm ●● Wave soldering profile No clean process only maximum 260 °C, 10 s 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 (e.g. primary busbar, 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. Remark 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: https://www.lem.com/en/file/3137/download/. Page 8/11 26February2019/version 1 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice LEM International SA Chemin des Aulx 8 1228 PLAN-LES-OUATES Switzerland www.lem.com LDSR 0.3-TP/SP1 Dimensions (in mm) Connection Uref dCI dCp UC Uref Uout Page 9/11 26February2019/version 1 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice LEM International SA Chemin des Aulx 8 1228 PLAN-LES-OUATES Switzerland www.lem.com LDSR 0.3-TP/SP1 Creepage and Clearance Page 10/11 26February2019/version 1 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice LEM International SA Chemin des Aulx 8 1228 PLAN-LES-OUATES Switzerland www.lem.com LDSR 0.3-TP/SP1 Packaging information Standard delivery in cardboard: L × W × H: 300 × 200 × 200 mm Each carboard contains 60 parts, placed into 3 Polystyrene-made trays of 20 parts each one. Both trays and carboard are ESD-compliant. The typical weight of the cardboard is 2.5 Kg. Page 11/11 26February2019/version 1 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice LEM International SA Chemin des Aulx 8 1228 PLAN-LES-OUATES Switzerland www.lem.com