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LA55-P Datenblatt(PDF) 1 Page - LEM

Teilenummer LA55-P
Bauteilbeschribung  Current Transducer
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Hersteller  LEM [LEM]
Direct Link  http://www.lem.co.jp/HQ/en
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LA55-P Datenblatt(HTML) 1 Page - LEM

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LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice.
070103/11
Current Transducer LA 55-P
For the electronic measurement of currents : DC, AC, pulsed...,
with a galvanic isolation between the primary circuit (high power)
and the secondary circuit (electronic circuit).
Electrical data
I
PN
Primary nominal current rms
50
A
I
PM
Primary current, measuring range
0 .. ± 70
A
R
M
Measuring resistance @
T
A = 70°C
T
A = 85°C
R
M miniRM maxi RM mini RM maxi
with ± 12 V
@ ± 50 A
maxi
10
100
60
95
@ ± 70 A
maxi
10
50
601) 601)
with ± 15 V
@ ± 50 A
maxi
50
160
135 155
@ ± 70 A
maxi
50
90
1352) 1352)
I
SN
Secondary nominal current rms
50
mA
K
N
Conversion ratio
1 : 1000
V
C
Supply voltage (± 5 %)
± 12 .. 15
V
I
C
Current consumption
10 (@ ±15 V) + I
S mA
V
d
Rms voltage for AC isolation test, 50 Hz, 1 min
2.5
kV
Accuracy - Dynamic performance data
X
Accuracy @ I
PN , TA = 25°C
@ ± 15 V (± 5 %)
± 0.65
%
@ ± 12 .. 15 V (± 5 %)
± 0.90
%
ε
L
Linearity error
< 0.15
%
Typ
Maxi
I
O
Offset current @ I
P = 0, TA = 25°C
± 0.2
mA
I
OM
Magnetic offset current 3) @ I
P = 0 and specified RM
after an overload of 3 x I
PN
± 0.3
mA
I
OT
Temperature variation of I
O
0°C .. + 70°C
± 0.1
± 0.5
mA
- 25°C .. + 85°C
± 0.1
± 0.6
mA
t
ra
Reaction time @ 10 % of I
PN
< 500
n s
t
r
Response time @ 90 % of I
PN Step
< 1
µs
di/dt
di/dt accurately followed
> 200
A/µs
BW
Frequency bandwidth (- 1 dB)
DC .. 200
kHz
General data
T
A
Ambient operating temperature
- 25 .. + 85
°C
T
S
Ambient storage temperature
- 40 .. + 90
°C
R
S
Secondary coil resistance @
T
A = 70°C
80
T
A = 85°C
85
m
Mass
18
g
Standards
EN 50178: 1997
Notes: 1) Measuring range limited to ± 60 A
maxi
2) Measuring range limited to ± 55 A
maxi
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.
I
PN
=
50 A
16019


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