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LA55-P (Current sensor)

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Current Transducer LA 55-P MAKE LEM
For the electronic measurement of currents: DC, AC, pulsed...,
with galvanic isolation between the primary circuit (high power) and the secondary circuit (electronic circuit).
Ipn = 50 A
Electrical dataIPN Primary nominal current rms 50 A
IPM Primary current, measuring range 0 .. ± 70 A
RM Measuring resistance TA = 70°C TA = 85°C
RM min RM max RM min RM max
with ± 12 V
@ ± 50 A max 10 100 60 95 Ω
@ ± 70 A max 10 50 60 1) 60 1) Ω
with ± 15 V
@ ± 50 A max 50 160 135 155 Ω
@ ± 70 A max 50 90 135 2) 135 2) Ω
ISN Secondary nominal current rms 50 mA
KN Conversion ratio 1 : 1000
VC Supply voltage (± 5 %) ± 12 .. 15 V
IC Current consumption 10 (@ ± 15 V) IS mA
General data
TS Ambient storage temperature - 40 .. 90 °C
RS Secondary coil resistance @ TA = 70°C 80 Ω
@ TA = 85°C 85 Ω
m Mass 18 g
Standards EN 50178: 1997
Notes: 1) Measuring range limited to ± 60 A max 2) Measuring range limited to ± 55 A max 3) Result of the coercive field of the magnetic circuit.
Features
Closed loop (compensated)
current transducer using the Hall effect Printed circuit board mounting
Isolated plastic case recognized
according to UL 94-V0.Advantages Excellent accuracy
Very good linearity
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.

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