Current Transducer LTS 15-NP
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 15 At
IPPrimary current, measuring range 0 .. ± 45 At
VOUT Analog output voltage IP = 0 2.5 1) V
± IPN 2.5 ± 0.625 V
N S Number of secondary turns (± 0.1 %) 2000
R LLoad resistance ≥ 2 kΩ
R IM Internal measuring resistance (± 0.5 %) 83.33 Ω
TCR IM Thermal drift of R IM < 50 ppm/K
VCSupply voltage (± 5 %) 5V
ICCurrent consumption @ VC = 5 V Typ 20 + ISmA
VdR.m.s. voltage for AC isolation test, 50/60 Hz, 1 mn 2.5 kV
VbR.m.s. rated voltage 525 2) V
Accuracy - Dynamic performance data
XAccuracy @ IPN , TA = 25°C ± 0.2 %
Accuracy with R IM @ IPN , TA = 25°C ± 0.7 %
εLLinearity < 0.1 %
Typ Max
TCVOUT Thermal drift of VOUT @ IP = 0 - 10°C .. + 85°C 75 150 ppm/K
TCεGThermal drift of the gain - 10°C .. + 85°C 50 3) ppm/K
VOM Residual voltage @ IP = 0, after an overload of3 x IPN ± 0.5 mV
5 x IPN ± 2.0 mV
10 x IPN ± 2.0 mV
tra Reaction time @ 10 % of IP max < 50 ns
trResponse time @ 90 % of IP max < 200 ns
di/dt di/dt accurately followed > 100 A/µs
fFrequency bandwidth (0 .. - 0.5 dB) DC .. 100 kHz
(- 0.5 .. 1 dB) DC .. 200 kHz
General data
TAAmbient operating temperature - 10 .. + 85 °C
TSAmbient storage temperature - 25 .. + 100 °C
mMass 10 g
Standards EN 50178
Notes : 1) Absolute value @ TA = 25°C, 2.4750 < VOUT < 2.5250
2) Pollution class 2, category III
3) Only due to TCR IM
Features
• Closed loop (compensated) multi-
range current transducer using the
Hall effect
• Unipolar voltage supply
• Compact design for PCB mounting
• Insulated plastic case recognized
according to UL 94-V0
• Incorporated measuring resistance
• Extended measuring range.
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.
Preliminary
Copyright protected.
IPN = 5 - 7.5 - 15 A
981222/1
LEM Components www.lem.com
Output Voltage - Primary CurrentMechanical characteristics
• General tolerance ± 0.2 mm
• Fastening & connection of primary 6 pins 0.7 x 0.8 mm
Recommended PCB hole 1.3 mm
• Fastening & connection of secondary 3 pins 0.5 x 0.35 mm
Recommended PCB hole 0.8 mm
• Additional primary through-hole ∅ 3.2 mm
Remark
• VOUT is positive when IP flows from terminals 1, 2, 3 to
terminals 6, 5, 4.
Bottom view
Right view
Operation principle
Back view Front view
Standard 00 Year Week
or N° SP..
Dimensions LTS 15-NP (in mm. 1 mm = 0.0394 inch)
Closed loop Output
transducer amplifier
IS = ± 7.5 mA @ IP = ± 15 At
Number Primary nominal Nominal Primary Primary Recommended
of primary r.m.s. current output voltage resistance insertion inductance connections
turns IPN [ A ] VOUT [ V ] R P [ mΩ ] L P [ µH ]
1± 15 2.5 ± 0.625 0.18 0.013
2± 7.5 2.5 ± 0.625 0.81 0.05
3± 5 2.5 ± 0.625 1.62 0.12
6 5 4 OUT
IN 1 2 3
6 5 4 OUT
IN 1 2 3
6 5 4 OUT
IN 1 2 3
- IPmax - IPN 0 IPN IPmax
5
4.5
3.125
2.5 1.875
0.5 IP [ At ]
VOUT [ V ]
LEM reserves the right to carry out modifications on its transducers, in order to improve them, without previous notice.
