LA55-TP Ver la hoja de datos (PDF) - LEM Industrial
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LA55-TP Datasheet PDF : 3 Pages
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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
16016
IPN
Primary nominal r.m.s. current
IP
Primary current, measuring range
RM Measuring resistance @
with ± 12 V
with ± 15 V
@ ± 50 A max
@ ± 70 A
max
@ ± 50 A max
@ ± 70 A
max
I
Secondary nominal r.m.s. current
SN
K N Conversion ratio
V
Supply voltage (± 5 %)
C
IC
Current consumption
50
A
0 .. ± 70
A
TA = 70°C TA = 85°C
RM min RMmax RM min RMmax
10 100 60 95 Ω
10 50 60 1) 60 1) Ω
50 160 135 155 Ω
50 90 135 2)135 2) Ω
50
mA
1 : 1000
± 12 .. 15
V
10 (@ ± 15 V) + IS mA
Accuracy - Dynamic performance data
X
Accuracy @ IPN , TA = 25°C
@ ± 15 V (± 5 %) ± 0.65
%
@ ± 12 .. 15 V (± 5 %) ± 0.90
%
εL
Linearity error
< 0.15
%
Typ Max
I
Offset current @ I = 0, T = 25°C
O
P
A
± 0.2 mA
IOM
Residual current 3) @ IP = 0, after an overload of 3 x IPN
± 0.3 mA
I
Thermal drift of I
OT
O
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 @ 30A (- 3 dB)
General data
< 500
< 2.5
> 200
DC .. 100
ns
µs
A /µ s
kHz
TA
Ambient operating temperature
T
Ambient storage temperature
S
R S Secondary coil resistance @
m
Mass
Standards
TA = 70°C
T = 85°C
A
- 25 .. + 85
°C
- 40 .. + 90
°C
80
Ω
85
Ω
24
g
EN 50178 : 1997
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.
Application Domain
• Industrial
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.
LEM
LEM reserves the right to carry out modifications on its transducers, in order to improve them, without previous notice.
060126/7
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