Current Transducer LAS 50-TP/SP1
For the electronic measurement of currents : DC, AC, pulsed, mixed,
with a galvanic isolation between the primary circuit (high power)
and the secondary circuit (electronic circuit).
Electrical data
IPN Primary nominal r.m.s. current 50 A
IPPrimary current, measuring range 0 .. ± 150 A
VOUT Analog output voltage @ IPV REF ± (0.625·IP/IPN)V
IP = 0 V REF ± 0.025 V
V REF Reference voltage - input 2.5 ± 0.2 V
V REF Load impedance ≥ 1 MΩ
R L Output load resistance ≥ 2 kΩ
ROUT Output internal resistance < 20 Ω
C L Max. output capacitive load 1nF
VCSupply voltage (± 5 %) 5V
ICCurrent consumption @ VC = 5 V typ 17 mA
VdR.m.s. voltage for AC isolation test, 50/60 Hz, 1 mn 5kV
VeR.m.s. voltage for partial discharge extinction @ 10 pC 2kV
VwImpulse withstand voltage 1.2/50 µs 8kV
Accuracy - Dynamic performance data
XAccuracy 1) @ IPN , TA = 25°C < ± 1 %
εLLinearity error 0 .. IPN 2) < 0.7 %
Typ Max
TCVOUT / VREF Thermal drift of VOUT / VREF @ IP = 0 - 40°C .. + 85°C 50 80 ppm/K
TCεGThermal drift of the gain - 40°C .. + 85°C 150 300 ppm/K
VOM Residual voltage @ IP = 0, after an overload of 2 x IPN DC ± 5 mV
tra Reaction time @ 10 % of IPN < 200 ns
trResponse time @ 90 % of IPN < 500 ns
di/dt di/dt accurately followed > 100 A/µs
Output noise without external filter < 10 mVpp
fFrequency bandwidth (- 1 dB) DC .. 100 kHz
General data
TAAmbient operating temperature - 40 .. + 85 °C
TSAmbient storage temperature - 40 .. + 100 °C
mMass 20 g
Insulating material group I
Standards EN 50178 (97.10.01)
All data are given with a R L = 10 kΩ.
Notes : 1) Excluding electrical, magnetic offsets and linearity
2) Including magnetic offset.
Features
•Current transducer using
Eta-technology
•Unipolar voltage supply
•Insulated plastic case recognized
according to UL 94-V0
•Compact design for PCB mounting
•Extended measuring range.
Special feature
•Ref IN input = external reference.
Advantages
•Excellent accuracy
•Very good linearity
•Very 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.
Copyright protected.
IPN = 50 A
040402/9
LEM Components www.lem.com
Dimensions LAS 50-TP/SP1 (in mm. 1 mm = 0.0394 inch)
Output Voltage - Primary Current
(V REF = 2.5 V in this example)
Mechanical characteristics
•General tolerance ± 0.2 mm
•Fastening & connection of primary 6 pins 1.4 x 1 mm
Recommended PCB hole 2 mm
•Fastening & connection of secondary 4 pins 0.7 x 0. 6 mm
Recommended PCB hole 1.2 mm
Remarks
•VOUT is positive when IP flows from terminals "IN" to
terminals "OUT".
•Temperature of the primary conductor should not exceed
100°C.
Bottom view
Left view
Connection
Front view
LEM reserves the right to carry out modifications on its transducers, in order to improve them, without previous notice.
- IPmax - IPN 0 IPN IPmax
[mΩ]
5
4.375
3.125
2.5 1.875
0.625
IP [ A ]
VOUT [ V ]
Number of
primary turns Primary current Nominal output
voltage Primary
resistance Primary
insertion
inductance
Nominal Maximal
IPN [A] IP [A] VOUT [V] RPLP [µH]
150 150 VREF ± 0.625 0.12 0.008
