IT 65-S ULTRASTAB

**Current transducer IT 65-S ULTRASTAB** 

_I_ **= 60 A** P N 

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

## **Features** 

- ●Wide operating temperature range of ‒40 °C to 85 °C 

- ●Closed loop (compensated) current transducer using an extremely accurate zero flux detector 

- ●Electrostatic shield between primary and secondary circuit 

- ●9-pin D-Sub male secondary connector 

- ●Optically insulated output (photocoupler type) indicates transducer state 

- ●LED indicator confirms normal operation. 

## **Advantages** 

- ●Very high accuracy 

- ●Excellent linearity 

- ●Extremely low temperature drift 

- ●Wide frequency bandwidth 

- ●High immunity to external fields 

- ●No insertion losses 

- ●Low noise on output signal 

## **Applications** 

- ●Feed back element in high performance gradient amplifiers for MRI 

- ●Feedback element in high-precision, high-stability power supplies 

- ●Calibration unit 

- ●Energy measurement 

- ●Medical equipment. 

## **Standards** 

- ●EN 61000-6-2: 2005 

- ●EN 61000-6-3: 2007 

- ●EN 61010-1: 2010. 

## **Application Domains** 

   - ●Industrial 

   - ●Laboratory 

   - ●Medical. 

- ●Low noise feedback to primary conductor. 

N° 88.K7.27.000.0 

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LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice 

28September2020/Version 2 

**IT 65-S ULTRASTAB** 

## **Insulation coordination** 

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Parameter Symbol Unit Value Comment<br>**----- End of picture text -----**<br>


|**Parameter**|**Symbol**|**Unit**|**Value**|**Comment**|
|---|---|---|---|---|
||||||
|Rated insulation RMS voltage, basic insulation|_U_Nm|V|2000|IEC 61010-1 conditions<br>- over voltage cat III<br>- pollution degree 2|
|Rated insulation RMS voltage, reinforced insulation|_U_Nm|V|600||
|Rated insulation RMS voltage, basic insulation|_U_Nm|V|1000|EN 50178 conditions<br>- over voltage cat III<br>- pollution degree 2|
|Rated insulation RMS voltage, reinforced insulation|_U_Nm|V|600||
|RMS voltage for AC insulation test, 50/60 Hz, 1 min|_U_d|kV|5.4|Between primary and<br>secondary + shield|
|||V DC|200|Between secondary and<br>shield|
|||V DC|300|Between secondary and<br>status output|
|Impulse withstand voltage 1.2/50 µs|_U_Ni|kV|9.9||
|Clearance (pri. - sec.)|_d_CI|mm|11|Shortest distance<br>through air|
|Creepage distance (pri. - sec.)|_d_Cp|mm|11|Shortest path along<br>device body|
|Comparative tracking index|_CTI_||600||



If insulated cable is used for the primary circuit, the voltage category could be improved with the following table (for single insulation) (IEC 61010-1 standard): 

Cable insulated (primary) Category HAR03 2150 V CAT III HAR05 2250 V CAT III HAR07 2350 V CAT III 

## **Environmental and mechanical characteristics** 

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Parameter Symbol Unit Min Typ Max Comment<br>**----- End of picture text -----**<br>


|**Parameter**|**Symbol**|**Unit**|**Min**|**Typ**|**Max**|**Comment**|
|---|---|---|---|---|---|---|
||||||||
|Ambient operating temperature|_T_A|°C|‒40||85||
|Ambient storage temperature|_T_A st|°C|‒40||85||
|Relative humidity|_RH_|%|20||80|Non-condensing|
|Dimensions||||||See drawing on page 7|
|Mass|_m_|kg||0.33|||



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LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice 

28September2020/Version 2 

**IT 65-S ULTRASTAB** 

## **Electrical data** 

## At _T_ A = 25 °C, ± _U_ C = ±15 V, unless otherwise noted. 

Lines with a * in the comment column apply over the −40 … 85 °C ambient temperature range. 

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Parameter Symbol Unit Min Typ Max Conditions<br>**----- End of picture text -----**<br>


|**Parameter**|**Symbol**|**Unit**|**Min**|**Typ**|**Max**|**Conditions**|**Conditions**|
|---|---|---|---|---|---|---|---|
|||||||||
|Primary continuous direct current (nominal)|_I_P N DC|A|−60||60|*||
|Primary nominal RMS current|_I_P N|A|||60|*||
|Primary current, measuring range|_I_P M|A|−85||85|*|Peak limit|
|Measuring resistance over operating current<br>temperature and supply voltage range|_R_M|Ω|0||50||See graph on page 5|
|Secondary current|_I_S|mA|−142||142|*|Peak limit|
|Secondary nominal RMS current|_I_S N|mA|||100|*||
|Turns ratio|_N_P/_N_S|||1:600||*||
|Resistance of secondary winding|_R_S|Ω||28||||
|Maximum withstand primary peak current1)|_Î_P max|A|−300||300||@ pulse of 100 ms|
|Supply voltage DC|_U_C|V|±14.25|±15|±15.75|*||
|Current consumption|_I_C|mA||65|71||Add_I_Sfor total current<br>consumption|
|||||70|78|*||
|RMS noise current 0 ... 10 Hz2)|_I_no|ppm|||0.5|||
|RMS noise current 0 ... 100 Hz2)|||||0.75|||
|RMS noise current 0 ... 1 kHz2)|||||2|||
|RMS noise current 0 ... 10 kHz2)|||||6|||
|RMS noise current 0 ... 50 kHz2)|||||15|||
|Re-injected RMS noise on primary bus bar||µV|||30||0 ... 50 kHz|
|Electrical ofset current + self magnetization +<br>efect of earth magnetic feld2)|_I_O E|ppm||±225|±300|||
|||||±330|±400|*||
|Ofset stability2)||ppm/month|||2.5|||
|Linearity error2)|_ε_L|ppm||±1|±3||@ ±_I_P N DCrange|
|||||±3|±9|*||
|Delay time to 90 % of the final output value for_I_P N DCstep<br>3)|_t_D 90|µs|||1||d_i/_d_t_of 100 A/µs|
|Frequency bandwidth (±1 dB)|_BW_|kHz||600|||Small-signal bandwidth,<br>0.5 % of_I_P N DC|
|Frequency bandwidth (±3 dB)|_BW_|kHz||800|||Small-signal bandwidth,<br>0.5 % of_I_P N DC|



Notes:[1)] Single pulse only, not AC. The transducer may require a few seconds to return to normal operation when autoreset system is running. 

- 2) All ppm figures refer to full-scale which corresponds to a secondary current ( _I_ S) of 100 mA. 

- 3) For a d _i /_ d _t_ = 100 A/µs, accurately followed. 

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LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice 

28September2020/Version 2 

**IT 65-S ULTRASTAB** 

## **Overload protection - Electrical specification - Status** 

The overload occurs when the primary current _I_ P  exceeds a trip level such that the fluxgate detector becomes completely saturated and, consequently, the transducer will switch from normal operation to overload mode. 

This trip level is guaranteed to be greater than 110 % of _I_ P M and its actual value depends on operating conditions such as temperature and measuring resistance. 

When this happens, the transducer will automatically begin to sweep in order to lock on the primary current again. 

## Overload condition should read: 

- ●The secondary current _I_ S generated is a low frequency signal between ‒142 mA and 142 mA. 

- ●The signal _U_ out (operation status between pin 3 and 8 of the D-sub connector) switches to _U_ + or GND depending on how it is wired. In other words, the output transistor is switched off (i.e., no current from collector to emitter). See the status port wiring below. 

- ●The green LED indicator (normal operation status) turns off. 

The measuring can resume when the primary current returns in the nominal range between − _I_ P M and + _I_ P M. Then the signal _U_ out switches to _U_ + or GND and the green LED indicator (normal operation status) is again lit. 

## **TO ENSURE A SAFE RECOVERY FROM SATURATION, THE MAXIMUM BURDEN RESISTOR ALLOWED IS 43 Ω.** 

## **Status/Interlock port wiring** 

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**----- Start of picture text -----**<br>
Diagram A: Active Low Output  U+ : 4 .. +45V<br>DC<br>Power<br>Supply<br>R<br>I C E max : 30 mA D-Sub9<br>I C E min  :   2 mA Pin<br>8 U OUT<br>The photocoupler is driven as follows: Collector<br>ON   : Transducer is OK (Normal Operation)<br>D-Sub9<br>OFF : Transducer is not OK  Pin U+ (V) - 0.65 V<br>Emitter 3 R min (kΩ) =  30 mA<br>U+ (V) - 0.65 V<br>R max (kΩ) =  2 mA<br>TRANSDUCER USER SIDE<br>Diagram B: Active High Output  U+ : 4 .. +45V<br>DC<br>D-Sub9 Power<br>Pin Supply<br>8<br>The photocoupler is driven as follows: Collector<br>ON   : Transducer is OK (Normal Operation)<br>D-Sub9<br>OFF : Transducer is not OK  Pin<br>Emitter<br>3 U OUT<br>I C E max : 30 mA<br>I C E min  :   2 mA R R min (kΩ) =  U+ (30 mAV) - 0.65 V<br>U+ (V) - 0.65 V<br>R max (kΩ) =  2 mA<br>TRANSDUCER USER SIDE<br>**----- End of picture text -----**<br>


LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice 

Page 4/7 LEM International SA Chemin des Aulx 8 1228 PLAN-LES-OUATES Switzerland www.lem.com 

28September2020/Version 2 

**IT 65-S ULTRASTAB** 

The following table shows how the output signal _U_ out acts depending on how it is wired: 

|**Case**|_U_**out**|**Description**|
|---|---|---|
|Diagram A|< 0.2 V|The transducer is OK (Normal operation)|
||_U+_|The transducer is not OK (Overload mode or supply fault)|
|Diagram B|< 0.2 V|The transducer is not OK (Overload mode or supply fault)|
||_U+_|The transducer is OK (Normal operation)|



## Some recommended standard values of _R_ : 

|**Power supply voltage**_U_**+**|**_R_min (k**Ω**)**|**_R_max (k**Ω**)**|**_R _standard values ±5 %**|
|---|---|---|---|
|5 V|0.145|2.175|0.150 kΩ, 2 kΩ|
|12 V|0.378|5.675|0.390 kΩ, 5.6 kΩ|
|24 V|0.778|11.675|0.820 kΩ, 11 kΩ|



## **Electrical data - status port** 

|**Parameter**|**Symbol**|**Unit**|**Min**|**Typ**|**Max**|**Comment**|
|---|---|---|---|---|---|---|
|Collector-emitter voltage, off-state|_U_C E off|V|4||45||
|Maximum collector-emitter current, on-state|_I_C E max|mA|2||30||
|Maximum reverse collector-emitter voltage, off-state|_U_C E R off max|V|||5||
|Collector-emitter voltage, on-state|_U_C E on|V|||0.2||



## **Maximum measuring resistor versus primary current and temperature** 

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LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice 

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28September2020/Version 2 

**IT 65-S ULTRASTAB** 

## **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. 

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LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice 

28September2020/Version 2 

**IT 65-S ULTRASTAB** 

## **Dimensions** (in mm) 

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Connection<br>I P<br>+ U C<br>− U C I S<br>d Cl d Cp<br>**----- End of picture text -----**<br>


## **Conn** ~~**e**~~ **ction** 

## **Me** ~~**cha**~~ **nic** ~~**a**~~ **l ch** ~~**ar**~~ **ac** ~~**ter**~~ **istics** 

●Normal operation status (Pins 3 and 8) Normal operation means: - ±15 V (± _U_ C) present - zero detector is working - compensation current < 110 % of _I_ ~~P M green LED indicator is lit.~~ 

## **Remarks** 

- _I_ S is positive when _I_ P flows in the direction of the arrow. 

- ●We recommend that a shielded output cable and plug are used to ensure the maximum immunity against electrostatic fields. 

- ~~G~~ e ~~ne~~ ral t ~~ol~~ eranc ~~e~~ 

   - ±0.3 mm 

- ●Transducer fastening - Straight mounting 

- 2 holes ⌀ 5.5 mm 

2 M5 steel screws 3.7 N ⋅ m 

- R ~~e~~ commended fastening torque 3.7 N ⋅ m ~~- Flat mounting 4 holes ⌀ 4.5 mm~~ 4 M4 steel screws 

Recommended fastening torque 

   - Recommended fastening torque 2.8 N ⋅ m 

   - ●Connection of secondary on D-SUB-9, connector UNC 4-40 

   - ●Primary through hole ⌀ < 26 mm 

- ●Pin 4 should be connected to cable and connector shield to maintain lowest output noise. 

- ●All mounting recommendations are given for a standard mounting. Screws with flat and spring washers. 

- ●Temperature of the primary conductor should not exceed 100 °C. 

- ●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.** 

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LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice 

28September2020/Version 2