For the electronic measurement of current: DC, AC, pulsed..., with galvanic separation between the primary and the secondary circuit.

Transcription

1 Current Transducer HO-NP/SP33 series I PN = 8, 15, 25 A Ref: HO 8-NP/SP33, HO 15-NP/SP33, HO 25-NP/SP33 For the electronic measurement of current: DC, AC, pulsed..., with galvanic separation between the primary and the secondary circuit. Features Hall effect measuring principle Multirange current transducer through PCB pattern lay-out Galvanic separation between primary and secondary circuit Insulated test voltage 43 V Low power consumption Extremely low profile 12 mm Fixed offset & sensitivity Over-current detect 2.63 I PN (peak value) Memory check. Special feature Single power supply +3.3 V. Advantages Small size and space saving Only one design for wide primary current range High immunity to external interference 8 mm creepage /clearance Fast response. Applications AC variable speed 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 solar inverter on DC side of the inverter (MPPT) Combiner box. Standards EN 5178: 1997 IEC 611-1: 21 IEC : 212 UL 58: 21. Application Domain Industrial. N , N , N Page 1/16

2 Absolute maximum ratings Parameter Symbol Unit Value Supply voltage (not operating) U C V 6.5 Primary conductor temperature T B C 12 ESD rating, Human Body Model (HBM) U ESD kv 2 Stresses above these ratings may cause permanent damage. Exposure to absolute maximum ratings for extended periods may degrade reliability. UL 58: Ratings and assumptions of certification File # E Volume: 2 Section: 5 Standards Ratings CSA C22.2 NO INDUSTRIAL CONTROL EQUIPMENT - Edition 11 - Revision Date 211/8/1 UL 58 STANDARD FOR INDUSTRIAL CONTROL EQUIPMENT - Edition 17 - Revision Date 21/4/15 Conditions of acceptability When installed in the end-use equipment, consideration shall be given to the following: 1 - These devices have been evaluated for overvoltage category III and for use in pollution degree 2 environment. 2 - A suitable enclosure shall be provided in the end-use application. 3 - The terminals have not been evaluated for field wiring. 4 - These devices have been evaluated for use in 15 C maximum surrounding air temperature. 5 - The secondary (Sensing) circuit is intended to be supplied by a Isolated Secondary Circuit - Limited voltage circuit defined by UL 58 paragraph The maximum open circuit voltage potential available to the circuit and overcurrent protection shall be evaluated in the end use application. 6 - These devices are intended to be mounted on a printed wiring board of end-use equipment. The suitability of the connections (including spacings) shall be determined in the end-use application. 7 - Primary terminals shall not be straightened since assembly of housing case depends upon bending of the terminals. 8 - Any surface of polymeric housing have not been evaluated as insulating barrier. 9 - Low 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). Marking Parameter Symbol Unit Value Primary involved potential V AC/DC 6 Max surrounding air temperature T A C 15 Primary current I P A According to series primary currents Secondary supply voltage U C V DC 3.3 Output voltage V out V to 3.3 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. Page 2/16

3 Insulation coordination Parameter Symbol Unit Value Comment Rms voltage for AC isolation test 5/6 Hz/1 min U d kv 4.3 Impulse withstand voltage 1.2/5 µs Û W kv 8 Partial discharge extinction rms 1 pc U e V 165 Clearance (pri. - sec.) d CI mm 8 Shortest distance through air Creepage distance (pri. - sec.) d Cp mm 8 Case material V according to UL 94 Comparative tracking index CTI 6 Shortest path along device body Application example V CAT III PD2 Reinforced insulation, non uniform field according to EN 5178 Application example V CAT III PD2 Reinforced insulation, non uniform field according to IEC 611 Application example V CAT III PD2 Simple insulation, non uniform field according to EN 5178, IEC 611 Environmental and mechanical characteristics Parameter Symbol Unit Min Typ Max Comment Ambient operating temperature T A C Ambient storage temperature T S C Surrounding temperature according to UL 58 C 15 Mass m g 5 Page 3/16

4 Electrical data HO 8-NP/SP33-1 At T A = 25 C, U C = +3.3 V, N P = 3 turns, R L = 1 KΩ unless otherwise noted (see Min, Max, typ. definition paragraph in page 12). Parameter Symbol Unit Min Typ Max Comment Primary nominal rms current I PN At 8 Primary current, measuring range I PM At -2 2 Number of primary turns N P 1,2,3 Supply voltage U C V Current consumption I C ma 25 Reference voltage V ref V Internal reference External reference voltage V ref V.5 U C = V.5 U C = V Output voltage I PM V out - V ref V Output I P = A V out V V ref + V OE Electrical offset voltage V OE mv -7 7 Temperature coefficient of V ref TCV ref ppm/k ±17 ±18-2 C.. 85 C Internal reference -4 C.. 15 C Internal reference Temperature coefficient of V OE TCV OE mv/k ±.8-4 C.. 15 C Theoretical sensitivity G th mv/a mv/ I U C Sensitivity error ε G % ±.5 Factory adjustment Temperature coefficient of G TCG ppm/k ±2-2 C.. 85 C ±21-4 C.. 15 C Linearity error.. I PN ε L % of I PN U C Linearity error.. I PM ε L % of I PM U C Gain error with respect to U C ±1 % %/% ±.4 Gain error per U C drift Magnetic offset I P = after 2.5 I PN V OM mv ±4 Reaction 1 % of I PN t ra µs 2 di/dt = I PN /µs Response 9 % of I PN t r µs 3.5 di/dt = I PN /µs Frequency bandwidth (-3 db) BW khz 25 Output rms voltage noise (spectral density) (DC.. 1 khz) Output voltage noise (DC.. 2 MHz) e no µv/ Hz 18.9 V no mvpp 4 Standby pin level V.3 Standby pin 1 level V U C -.3 Time to switch from standby to normal mode µs 2 Over-current detect At 2.6 I PN 2.9 I PN 3.2 I PN peak value X % of I PN ±1 = ε G + ε T A = +85 C X % of I PN ±3.3 See formula note T A = +15 C X % of I PN ±4.1 See formula note 1) 1) Note: I P and X TA = ± [X + (TCG/1) (T A - 25) + TCV OE 1 (T A -25) / (G th I P )]. Page 4/16

5 Electrical data HO 15-NP/SP33-1 At T A = 25 C, U C = +3.3 V, N P = 3 turns, R L = 1 KΩ unless otherwise noted (see Min, Max, typ. definition paragraph in page 12). Parameter Symbol Unit Min Typ Max Comment Primary nominal rms current I PN At 15 Primary current, measuring range I PM At Number of primary turns N P 1,2,3 Supply voltage U C V Current consumption I C ma 25 Reference voltage V ref V Internal reference External reference voltage V ref V.5 U C = V.5 U C = V Output voltage I PM V out - V ref V Output I P = A V out V V ref + V OE Electrical offset voltage V OE mv -5 5 Temperature coefficient of V ref TCV ref ppm/k ±17 ±18-2 C.. 85 C Internal reference -4 C.. 15 C Internal reference Temperature coefficient of V OE TCV OE mv/k ±.8-4 C.. 15 C Theoretical sensitivity G th mv/a mv/ I U C Sensitivity error ε G % ±.5 Factory adjustment Temperature coefficient of G TCG ppm/k ±2-2 C.. 85 C ±21-4 C.. 15 C Linearity error.. I PN ε L % of I PN U C Linearity error.. I PM ε L % of I PM U C Gain error with respect to U C ±1 % %/% ±.4 Gain error per U C drift Magnetic offset I P = after 2.5 I PN V OM mv ±4 Reaction 1 % of I PN t ra µs 2 di/dt = I PN /µs Response 9 % of I PN t r µs 3.5 di/dt = I PN /µs Frequency bandwidth (-3 db) BW khz 25 Output rms voltage noise (spectral density) (DC.. 1 MHz) Output voltage noise (DC.. 2 MHz) e no µv/ Hz 1.15 V no mvpp 3 Standby pin level V.3 Standby pin 1 level V U C -.3 Time to switch from standby to normal mode µs 2 Over-current detect At 2.6 I PN 2.9 I PN 3.2 I PN peak value X % of I PN ±1 = ε G + ε T A = +85 C X % of I PN ±3.3 See formula note T A = +15 C X % of I PN ±4.1 See formula note 1) 1) Note: I P and X TA = ± [X + (TCG/1) (T A - 25) + TCV OE 1 (T A -25) / (G th I P )]. Page 5/16

6 Electrical data HO 25-NP/SP33-1 At T A = 25 C, U C = +3.3 V, N P = 3 turns, R L = 1 KΩ unless otherwise noted (see Min, Max, typ. definition paragraph in page 12). Parameter Symbol Unit Min Typ Max Comment Primary nominal rms current I PN At 25 Primary current, measuring range I PM At Number of primary turns N P 1,2,3 Supply voltage U C V Current consumption I C ma 25 Reference voltage V ref V Internal reference External reference voltage V ref V.5 U C = V.5 U C = V Output voltage I PM V out - V ref V Output I P = A V out V V ref + V OE Electrical offset voltage V OE mv -6 6 Temperature coefficient of V ref TCV ref ppm/k ±17 ±18-2 C.. 85 C Internal reference -4 C.. 15 C Internal reference Temperature coefficient of V OE TCV OE mv/k ±.8-4 C.. 15 C Theoretical sensitivity G th mv/a mv/ I U C Sensitivity error ε G % ±.5 Factory adjustment Temperature coefficient of G TCG ppm/k ±2-2 C.. 85 C ±21-4 C.. 15 C Linearity error.. I PN ε L % of I PN U C Linearity error.. I PM ε L % of I PM U C Gain error with respect to U C ±1 % %/% ±.4 Gain error per U C drift Magnetic offset I P = after 2.5 I PN V OM mv ±4 Reaction 1 % of I PN t ra µs 2 di/dt = I PN /µs Response 9 % of I PN t r µs 3.5 di/dt = I PN /µs Frequency bandwidth (-3 db) BW khz 25 Output rms voltage noise (spectral density) (DC.. 1 MHz) Output voltage noise (DC.. 2 MHz) e no µv/ Hz 6.13 V no mvpp 2 Standby pin level V.3 Standby pin 1 level V U C -.3 Time to switch from standby to normal mode µs 2 Over-current detect At 2.6 I PN 2.9 I PN 3.2 I PN peak value X % of I PN ±1 = ε G + ε T A = +85 C X % of I PN ±3.3 See formula note T A = +15 C X % of I PN ±4.1 See formula note 1) 1) Note: I P and X TA = ± [X + (TCG/1) (T A - 25) + TCV OE 1 (T A -25) / (G th I P )]. Page 6/16

7 Typical performance characteristics I PN = 8 A Linearity error (%) Linearity error HO 8-NP/SP Primary current (A) Figure 1: Linearity error Gain [ db at 5 Hz] Frequency characteristics Gain [ db at 5 Hz] Spec Phase Frequency [Hz] Figure 2: Frequency response Phase [deg] Vout Ip Vout Ip 2 µs/div 1 µs/div Figure 3: Step response Figure 4: dv/dt 2 mv/div Figure 5: Output noise Page 7/16

8 Typical performance characteristics I PN = 15 A Linearity error (%) Linearity error HO 15-NP/SP Primary current (A) Figure 6: Linearity error Gain [ db at 5 Hz] Frequency characteristics Gain [ db at 5 Hz] Spec Phase Frequency [Hz] Figure 7: Frequency response Phase [deg] Vout Ip Vout Ip 2 µs/div Figure 8: Step response Figure 9: dv/dt 1 µs/div 2 mv/div Figure 1: Output noise Page 8/16

9 Typical performance characteristics I PN = 25 A Linearity error (%) Linearity error HO 25-NP/SP Primary current (A) Gain [ db at 5 Hz] Frequency characteristics Gain [ db at 5 Hz] Spec Phase Frequency [Hz] Phase [deg] Figure 11: Linearity error Figure 12: Frequency response Vout Ip Vout Ip 2 µs/div 1 µs/div Figure 13: Step response Figure 14: dv/dt 2 mv/div Figure 15: Output noise Page 9/16

10 Maximum continuous DC primary primary current I p (A) 2 I p (A) 5 1 8A 15A 25 15A T A ( ) T A ( ) I p (A) A T A ( ) Figure 16: I P vs T A for HO series Important notice: whatever the usage and/or application, the transducer jumper temperature shall not go above the maximum rating of 12 C as stated in page 2 of this datasheet. Page 1/16

11 Measuring range with external reference voltage I p (A) HO V ref (V) Upper limit: I P = V ref (V ref = V) Lower limit: I P = V ref +8.7 (V ref = V) I p (A) HO V ref (V) Upper limit: I P = V ref (V ref = V) Lower limit: I P = V ref (V ref = V) I p (A) HO V ref (V) Upper limit: T A = 15 C I P = 8 (V ref = V) I P = V ref (V ref = V) T A = 85 C I P = 9 (V ref = V) I P = V ref (V ref = V) T A = 8 C I P = 1 (V ref = V) I P = V ref (V ref = V) T A = 25 C I P = 11 (V ref = V) I P = V ref (V ref = V) Lower limit: I P = V ref (V ref = V) Example with V ref =.5 V: The 8 A version has a measuring range from A to 4 A The 15 A version has a measuring range from A to 75 A The 25 A version has a measuring range from A to 8 A at T A = 15 C Example with V ref = 1.5 V: The 8 A version has a measuring range from A to 22.6 A The 15 A version has a measuring range from A to A The 25 A version has a measuring range from A to +7.6 A Page 11/16

12 Application information Total primary resistance The primary resistance is.36 mω per conductor at 25 C. In the following table, examples of primary resistance according to the number of primary turns. Number of primary turns Primary resistance current rms R P [ mω ] Recommended connections OUT IN OUT IN OUT IN Primary nominal current I PN [ A ] 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. 1 % 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 %. 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 %, corresponding to an interval between -sigma and +sigma for a normal distribution. Typical, maximal and minimal values are determined during the initial characterization of a product. 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 ANE1254 available on our Web site: Products/Product Documentation. Page 12/16

13 HO-NP/SP33 Series: name and codification HO family products may be ordered on request 1) with a dedicated setting of the parameters described below (standards products are delivered with the setting according to the table). HO 15-NP/SP33-XXXX Reference out: 2.5 V V V 3.5 V 4 only V ref IN (Low power mode engaged) Response time: 3.5 µs 1 2 µs 2 6 µs H 2.3 The products of this datasheet are the following references: : - HO 8-NP/SP HO 15-NP/SP HO 25-NP/SP33-1 Note: 1) For other dedicated settings, minimum quantities apply. EEPROM Control: YES 1 NO Over current detection: SET_THRESH = A.67 B.94 C 1.17 D 1.4 SET_THRESH = 1 E 1.6 F 1.9 G 2.1 Page 13/16

14 PCB Footprint Assembly on PCB Recommended PCB hole diameter Maximum PCB thickness Wave soldering profile No clean process only 1.5 mm for primary pin.9 mm for secondary pin 2.4 mm maximum 26 C, 1 s Safety This transducer must be used in limited-energy secondary circuits according to IEC 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 bus bar, 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. Page 14/16

15 Ampere-turns and amperes The transducer is sensitive to the primary current linkage Θ P (also called ampere-turns). Θ P = N P I P (At) Where N P is the number of primary turn (depending on the connection of the primary jumpers) Caution: As most applications will use the transducer with only one single primary turn (N P = 1), much of this datasheet is written in terms of primary current instead of current linkages. However, the ampere-turns (At) unit is used to emphasis that current linkages are intended and applicable. Transducer simplified model The static model of the transducer at temperature T A is: V out = G Θ P + overall error (mv) In which error = ε G Θ P G + ε L Θ P G + TCG (T A -25) Θ P G + V OE + TCVOE (T -25) (mv) A With: Θ P = N P I P : primary current linkage (At) Θ P max : max primary current linkage applied to the transducer (At) V out : output voltage (V) T A : ambient operating temperature ( C) V OE : electrical offset current (V) TCV OE : temperature coefficient of V OE (mv/k) G : sensitivity of the transducer (V/At) TCG : temperature coefficient of G (%/K) ε G : sensitivity error (%) ε L (Θ P max ) : linearity error for Θ P max (%) This model is valid for primary ampere-turns Θ P between -Θ P max and +Θ P max only. Sensitivity and linearity To measure sensitivity and linearity, the primary current (DC) is cycled from to I P, then to -I P and back to (equally spaced I P /1 steps). The sensitivity G is defined as the slope of the linear regression line for a cycle between ± I PN. The linearity error ε L is the maximum positive or negative difference between the measured points and the linear regression line, expressed in % of I PN. Magnetic offset Performance parameters definition The magnetic offset voltage V OM 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. V OM depends on the current value I P1 (I P1 > I PM ). V OM V = t ) V 1 2 ( t ) ( out out 2 I IP (DC) P1 A -I P1 Figure 17: Current cycle used to measure magnetic and electrical offset (transducer supplied) Electrical offset The electrical offset voltage V OE can either be measured when the ferro-magnetic parts of the transducer are: completely demagnetized, which is difficult to realize, or in a known magnetization state, like in the current cycle shown in figure 17. Using the current cycle shown in figure 18, the electrical offset is: V ( t ) + V ( t ) out 1 out 2 V = OE 2 Note: the transducer has to be demagnetized prior to the application of the current cycle (for example with a demagnetization tunnel). Overall accuracy The overall accuracy at 25 C X G is the error in the - I PN.. + I PN range, relative to the rated value I PN. It includes: the electrical offset V OE / Θ P G (%) the sensitivity error ε G (%) the linearity error ε L (to I PN ) (%) Response and reaction times t 1 The response time t r and the reaction time t ra are shown in figure 18 Both depend on the primary current di/dt. They are measured at nominal ampere-turns. I 1 % 9 % I p 1 % t r V out t 2 t t ra t Figure 18: Response time t r and reaction time t ra Page 15/16

16 Dimensions HO 8-NP/SP33, HO 15-NP/SP33, HO 25-NP/SP3 (mm, general linear tolerance ±.5 mm) Required Connection OUT IN 1 2 5Ω 3 2Ω nF 4.7nF 47nF >1kΩ +U c V V out V ref (IN/OUT) OCD STANDBY N/A (connected to ground) d CI d Cp Page 16/16