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Current Transducer LTS 15-NP
For the electronic measurement of currents: DC, AC, pulsed,
mixed with galvanic isolation between the primary circuit (high power)
and the secondary circuit (electronic circuit).
Electrical data
IPN Primary nominal current rms 15 At
IPM Primary current, measuring range 0 .. ± 48 At
ÎP Overload capability 250 At
VOUT Output voltage (Analog) @ IP 2.5 ± (0.625·IP/IPN) V
IP = 0 2.5 1) V
G Sensitivity 41.6 mV/A
N S Number of secondary turns (± 0.1 %) 2000
R L Load resistance ≥ 2 kW
R IM Internal measuring resistance (± 0.5 %) 83.33 W
TCR IM Temperature coefcient of R IM < 50 ppm/K
VC Supply voltage (± 5 %) 5 V
IC Current consumption @ VC = 5 V Typ 28+IS
2)+(VOUT/RL) mA
X Accuracy @ IPN, TA = 25°C ± 0.2 %
Accuracy - Dynamic performance data
Accuracy with RIM @ IPN, TA = 25°C ± 0.7 %
εL Linearity error < 0.1 %
Typ Max
TCVOUT Temperature coefcient of VOUT @ IP= 0 - 10°C .. + 85°C 65 120 ppm/K
- 40°C .. - 10°C 65 170 ppm/K
TCG Temperature coefcient of G - 40°C .. + 85°C 50 3) ppm/K
VOM Magnetic offset voltage @ IP = 0,
after an overload of 3 x IPN ± 0.5 mV
5 x IPN ± 2.0 mV
10 x IPN ± 2.0 mV
tra Reaction time @ 10 % of IPN < 100 ns
tr Response time to 90 % of IPN step < 400 ns
di/dt di/dt accurately followed > 35 A/µs
BW Frequency bandwidth (0 .. - 0.5 dB) DC .. 100 kHz
(- 0.5.. 1 dB) DC .. 200 kHz
General data
TA Ambient operating temperature - 40 .. + 85 °C
TS Ambient storage temperature - 40 .. + 100 °C
m Mass 10 g
Standards EN 50178: 1997
IEC 60950-1: 2001
Notes:
1) Absolute value @ TA = 25°C, 2.475 < VOUT < 2.525
2) IS = IP/NS
3) Only due to TCRIM.
IPN = ± 15 At
Features
● Closed loop (compensated) multi-
range current transducer using
the Hall effect
● Unipolar voltage supply
● Isolated plastic case recognized
according to UL 94-V0
● Compact design for PCB
mounting
● 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.
Application domain
● Industrial.
16058
LEM reserves the right to carry out modications on its transducers, in order to improve them, without prior notice.
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Current Transducer LTS 15-NP
Isolation characteristics
Vd Rms voltage for AC isolation test, 50 Hz, 1 min 3 kV
Vw Impulse withstand voltage 1.2/50 µs > 8 kV
Min
Ve Rms voltage for partial discharge extinction @ 10pC > 1.5 kV
Min
dCp Creepage distance 1) 15.5 mm
dCI Clearance distance 2) 6.35 mm
CTI Comparative Tracking Index (group IIIa) 175
Notes: 1) On housing
2) On PCB with soldering pattern UTEC93-703.
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 insulation voltage Nominal voltage
Single insulation 600 V 600 V
Reinforced insulation 300 V 300 V
Vw
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Dimensions LTS 15-NP (in mm)
Mechanical characteristics
● General tolerance ± 0.2 mm
● Fastening & connection of primary 6 pins 0.8 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 Ø 3.2 mm
Remarks
●VOUT swings above 2.5 V when IP ows from terminals 1,
2, 3 to terminals 6, 5, 4 (with the arrow).
● Temperature of the primary jumper should not exceed
100°C.
Output Voltage - Primary Current
Operation principle
- IPM - IPN IPM
IPN
0
VOUT [ V ]
[ At ]
IP
4.5
5
2.5
0.5
3.125
1.875
Number of
primary turns
Primary nominal
current rms
IPN [ A ]
Nominal
output voltage
VOUT [ V ]
Primary
resistance
RP [ mW ]
Primary insertion
inductance
LP [ µH ]
Recommended
connections
1± 15 2.5 ± 0.625 0.18 0.013
6 5 4 OUT
IN 1 2 3
2± 7.5 2.5 ± 0.625 0.81 0.05
6 5 4 OUT
IN 1 2 3
3± 5 2.5 ± 0.625 1.62 0.12
6 5 4 OUT
IN 1 2 3