Datasheet

060504/14
LEM www.lem.com
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 LAS 50-TP
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 50 A
I
P
Primary current, measuring range 0 .. ± 150 A
V
OUT
Analog output voltage @ I
P
V
REF
± (0.625·I
P
/I
PN
) V
I
P
= 0 V
REF
± 0.025 V
R
L
Output load resistance ≥ 2 kΩ
R
OUT
Output internal resistance < 20 Ω
V
REF
Internal reference voltage 2.5 ± 0.025 V
V
REF
load resistance ≥ 1 MΩ
V
REF
internal resistance 200 Ω
V
REF
external voltage range 2.0 .. 2.8 V
C
L
Max. output capacitive load 1 nF
V
C
Supply voltage (± 5 %) 5 V
I
C
Current consumption @ V
C
= 5 V typ 18 mA
Accuracy - Dynamic performance data
X Accuracy
1)
@ I
PN
, T
A
= 25°C < ± 1 %
ε
L
Linearity error 0 .. I
PN
2)
< 0.7 %
Typ Max
TCV
OUT
Thermal drift of V
OUT
@ I
P
= 0 - 40°C.. + 85°C 80 120 ppm/K
TCV
OUT
/ V
REF
Thermal drift of V
OUT
/ V
REF
@ I
P
= 0 - 40°C.. + 85°C 50 80 ppm/K
TCε
G
Thermal drift of the gain - 10°C.. + 85°C 150 300 ppm/K
- 40°C.. - 10°C 400 700 ppm/K
V
OM
Residual voltage @ I
P
= 0, after an overload of 2 x I
PN DC
± 5 mV
t
ra
Reaction time @ 10 % of I
PN
< 200 ns
t
r
Response time @ 90 % of I
PN
< 500 ns
di/dt di/dt accurately followed > 100 A/µs
Output noise without external filter < 10 mVpp
f Frequency bandwidth (- 1 dB) DC .. 100 kHz
General data
T
A
Ambient operating temperature - 40 .. + 85 °C
T
S
Ambient storage temperature - 40 .. + 100 °C
m Mass 20 g
Standards EN 50178 : 1997
All Data are given with a R
L
= 10 kΩ
Notes :
1)
Excluding electrical, magnetic offsets and linearity
2)
Including magnetic offset.
I
PN
= 50 A
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.
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.
Copyright protected.
16069