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Current Transducer LF 2005-S
For the electronic measurement of currents: DC, AC, pulsed...,
with galvanic isolation between the primary circuit (high power)
and the secondary circuit (electronic circuit).
Electrical data
IPN Primary nominal current rms 2000 A
IPM Primary current, measuring range @ ± 24 V 0 .. ± 3000 A
RM Measuring resistance @ TA = 70°C TA = 85°C
RM minRM max RM minRM max
with ± 15 V @ ± 2000 A max 0 8 07Ω
@ ± 2200 A max 0 5 0 4 Ω
with ± 24 V @ ± 2000 A max 5 29 13 28 Ω
@ ± 3000 A max 5 11 @ ± 2800 A 13 13 Ω
ISN Secondary nominal current rms 400 mA
KN Conversion ratio 1 : 5000
VC Supply voltage (± 5 %) ± .15 .. 24 V
IC Current consumption (± 1) 33 (@ ± 24 V) + IS mA
X Accuracy @ IPN , TA = 25°C ± 0.3 %
Accuracy - Dynamic performance data
εL Linearity error < 0.1 %
Typ Max
IO Offset current @ IP = 0, TA = 25°C ± 0.5 mA
IOM Magnetic offset current @ IP = 0 and specied RM,
after an overload of 3 x IPN ± 0.2 mA
IOT Temperature variation of IO - 25°C .. + 85°C ± 0.2 ± 0.5 mA
- 40°C .. - 25°C ± 1.5 mA
tr Response time 1) to 90 % of IPN step < 1 µs
di/dt di/dt accurately followed > 50 A/µs
BW Frequency bandwidth (- 1 dB) DC .. 100 kHz
TA Ambient operating temperature - 40 .. + 85 °C
General data
TS Ambient storage temperature - 50 .. + 90 °C
RS Secondary coil resistance @ TA = 70°C 25 Ω
@ TA = 85°C 26 Ω
m Mass 1.5 kg
Standards EN 50178: 1997
Note: 1) With a di/dt of 100 A/µs.
IPN = 2000 A
Features
Closed loop (compensated) ●
current transducer using the Hall
effect
Isolated plastic case recognized ●
according to UL 94-V0.
Advantages
Excellent accuracy ●
Very good linearity ●
Low temperature drift ●
Optimized response time ●
Wide frequency bandwidth ●
No insertion losses ●
High immunity to external ●
interference
Current overload capability. ●
Applications
AC variable speed drives and ●
servo motor drives
Static converters for DC motor ●
drives
Battery supplied applications ●
Uninterruptible Power Supplies ●
(UPS)
Switched Mode Power Supplies ●
(SMPS)
Power supplies for welding ●
applications.
Application domain
Industrial. ●
16103
090525/10 LEM reserves the right to carry out modications on its transducers, in order to improve them, without prior notice. www.lem.com
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Current Transducer LF 2005-S
Isolation characteristics
Vd Rms voltage for AC isolation test, 50 Hz, 1 min 6 kV
Min
dCp Creepage distance 29.1 mm
dCI Clearance distance 27.1 mm
CTI Comparative Tracking Index (group I) 600
Applications examples
According to EN 50178 and IEC 61010-1 standards and following conditions:
Over voltage category OV 3 ●
Pollution degree PD2 ●
Non-uniform eld ●
Safety
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 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.
EN 50178 IEC 61010-1
dCp, dCI
Rated isolation voltage
Nominal voltage
Single isolation
4000 V
4000 V
Reinforced isolation
2000 V
2000 V
090525/10 LEM reserves the right to carry out modications on its transducers, in order to improve them, without prior notice. www.lem.com
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Connection
Dimensions LF 2005-S (in mm. 1 mm = 0.0394 inch)
Front view
Top view
Left view
Mechanical characteristics
General tolerance ± 0.5 mm ●
Transducer fastening 4 holes Ø 6.5 mm ●
Vertical or at position 4 steel screws M6
Recommended fastening torque 5.5 Nm or 4.05 Lb.-Ft.
Primary through-hole 60.5 x 20.5
Or Ø max 57 mm
Connection of secondary S3P-VH ●
Remarks
I ●S is positive when IP ows in the direction of the arrow.
Temperature of the primary conductor should not exceed ●
100°C.
Dynamic performances (di/dt and response time) are best ●
with a single bar completely lling the primary hole.
This is a standard model. For different versions (supply ●
voltages, turns ratios, unidirectional measurements...),
please contact us.
