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LA55-TP Datasheet, PDF (1/2 Pages) LEM – Current Transducer LA 55-TP | |||
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Current Transducer LA 55-TP
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).
IPN = 50 A
Electrical data
IPN
Primary nominal r.m.s. current
I
Primary current, measuring range
P
RM Measuring resistance @
50
A
0 .. ± 70
A
TA = 70°C TA = 85°C
RR RR
M min M max M min M max
with ± 12 V
with ± 15 V
@ ± 50 A
max
@ ± 70 A max
@ ± 50 A
max
@ ± 70 A max
10 100 60 95 â¦
10 50 60 1) 60 1) â¦
50 160 135 155 â¦
50 90 135 2)135 2) â¦
ISN
Secondary nominal r.m.s. current
K N Conversion ratio
VC Supply voltage (± 5 %)
IC
Current consumption
Vd
R.m.s. voltage for AC isolation test, 50 Hz, 1 mn
Vb
R.m.s. rated voltage
50
mA
1 : 1000
± 12 .. 15
V
10 (@ ± 15 V) + IS mA
2
kV
60
V
Accuracy - Dynamic performance data
X
Accuracy @ I , T = 25°C
@ ± 15 V (± 5 %) ± 0.65
%
PN A
@ ± 12 .. 15 V (± 5 %) ± 0.90
%
ε
Linearity
L
< 0.15
%
Typ Max
IO
Offset current @ IP = 0, TA = 25°C
± 0.2 mA
I
Residual current 3) @ I = 0, after an overload of 3 x I
OM
P
PN
± 0.3 mA
IOT
Thermal drift of IO
0°C .. + 70°C ± 0.1 ± 0.5 mA
- 25°C .. + 85°C ± 0.1 ± 0.6 mA
tra
tr
di/dt
f
Reaction time @ 10 % of IP max
Response time 4) @ 90 % of IP max
di/dt accurately followed
Frequency bandwidth (- 1 dB)
General data
< 500
<1
> 200
DC .. 200
ns
µs
A /µ s
kHz
TA
Ambient operating temperature
T
Ambient storage temperature
S
R S Secondary coil resistance @
m
Mass
Standards 5)
- 25 .. + 85
°C
- 40 .. + 90
°C
TA = 70°C 80
â¦
T = 85°C 85
A
â¦
24
g
EN 50178
Features
â¢Closed loop (compensated) current
transducer using the Hall effect
â¢Printed circuit board mounting
â¢Insulated plastic case recognized
according to UL 94-V0.
Advantages
â¢Excellent accuracy
â¢Very good linearity
â¢Low temperature drift
â¢Optimized response time
â¢Wide frequency bandwidth
â¢No insertion losses
â¢High immunity to external
interference
â¢Current overload capability.
Applications
â¢AC variable speed drives and servo
motor drives
â¢Static converters for DC motor drives
â¢Battery supplied applications
â¢Uninterruptible Power Supplies
(UPS)
â¢Switched Mode Power Supplies
(SMPS)
â¢Power supplies for welding
applications.
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) With a di/dt of 100 A/µs
5) A list of corresponding tests is available
980706/4
LEM Components
w w w .lem.com
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