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LA55-P Datasheet(PDF) 1 Page - LEM

Part No. LA55-P
Description  Current Transducer LA 55-P
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Manufacturer  LEM [LEM]
Direct Link  http://www.lem.co.jp/HQ/en
Logo LEM - LEM

LA55-P Datasheet(HTML) 1 Page - LEM

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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 r.m.s. current
50
A
I
P
Primary current, measuring range
0 .. ± 70
A
R
M
Measuring resistance @
T
A = 70°C
T
A = 85°C
R
M min RM max
R
M min RM max
with ± 12 V
@ ± 50 A
max
10
100
60
95
@ ± 70 A
max
10
50
601) 601)
with ± 15 V
@ ± 50 A
max
50
160
135 155
@ ± 70 A
max
50
90
13 52) 1352)
I
SN
Secondary nominal r.m.s. current
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
R.m.s. voltage for AC isolation test, 50 Hz, 1 mn
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
< 0.15
%
Typ
Max
I
O
Offset current @ I
P = 0, TA = 25°C
± 0.2
mA
I
OM
Residual current 3) @ I
P = 0, after an overload of 3 x I PN
± 0.3
mA
I
OT
Thermal drift 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
P max
< 500
n s
t
r
Response time @ 90 % of I
P max
< 1
µs
di/dt
di/dt accurately followed
> 200
A/µs
f
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 4)
EN 50178
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
4) A list of corresponding tests is available
Features
Closed loop (compensated) current
transducer using the Hall effect
Printed circuit board mounting
Insulated 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.
I
PN
=
50 A
980706/8
LEM Components
ww w .lem.com


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