Datasheet

LEM reserves the right to carry out modifications on its transducers, in order to improve them, without previous notice.
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Current Transducer LTSR 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
I
PN
Primary nominal r.m.s. current 15 At
I
P
Primary current, measuring range 0 .. ± 48
1)
At
V
OUT
Analog output voltage @ I
P
2.5 ± (0.625·I
P
/I
PN
)V
I
P
= 0 2.5
2)
V
V
REF
Voltage reference (internal reference), refout mode 2.5
3)
V
Voltage reference (external reference), refin mode 1.9 .. 2.7
4)
V
N
S
Number of secondary turns (± 0.1 %) 2000
R
L
Load resistance ≥ 2 kΩ
C
L
Max. capacitive loading 500 pF
R
IM
Internal measuring resistance (± 0.5 %) 83.33 Ω
TCR
IM
Thermal drift of R
IM
< 50 ppm/K
V
C
Supply voltage (± 5 %) 5 V
I
C
Current consumption @ V
C
= 5 V Typ 28 + I
S
5)
+ (V
OUT
/R
L
) mA
Accuracy - Dynamic performance data
X Accuracy @ I
PN
, T
A
= 25°C ± 0.2 %
Accuracy with R
IM
@ I
PN
, T
A
= 25°C ± 0.7 %
ε
L
Linearity error < 0.1 %
Max
TCV
OUT
Thermal drift of V
OUT
/V
REF
@ I
P
= 0
- 40°C .. + 85°C 64 ppm/K
TCε
G
Thermal drift of the gain - 40°C .. + 85°C 50
6)
ppm/K
V
OM
Residual voltage @ I
P
= 0, after an overload of 3 x I
PN
± 0.5 mV
5 x I
PN
± 2.0 mV
10 x I
PN
± 2.0 mV
TCV
REF
Thermal drift of internal V
REF
@ I
P
= 0 - 10°C .. + 85°C 50 ppm/K
- 40°C .. - 10°C 100 ppm/K
t
ra
Reaction time @ 10 % of I
PN
< 100 ns
t
r
Response time @ 90 % of I
PN
< 400 ns
di/dt di/dt accurately followed > 35 A/µs
f Frequency bandwidth (0 .. - 0.5 dB) DC .. 100 kHz
(- 0.5 .. 1 dB) DC .. 200 kHz
General data
T
A
Ambient operating temperature - 40 .. + 85 °C
T
S
Ambient storage temperature - 40 .. + 100 °C
Insulating material group III a
m Mass 10 g
Standards EN 50178 : 1997
IEC 60950-1 : 2001
Features
• Closed loop (compensated) multi-
range current transducer using the
Hall effect
• Unipolar voltage supply
• Insulated plastic case recognized
according to UL 94-V0
• Compact design for PCB mounting
• Incorporated measuring resistance
• Extended measuring range
• Access to the internal voltage
reference
• Possibility to feed the transducer
reference from external supply.
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.
I
PN
= 15 A
Copyright protected.
Application Domain
• Industrial.