Current Transducer LA 55-TP
IPN = 50 A
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).
16016
Electrical data
IPN
IP
RM
Primary nominal r.m.s. current
Primary current, measuring range
Measuring resistance @
50
0 .. ± 70
TA = 70°C
RM min RMmax RM min RMmax
A
A
Features
TA = 85°C
· Closed loop (compensated) current
transducer using the Hall effect
· Printed circuit board mounting
· Insulated plastic case recognized
according to UL 94-V0.
with ± 12 V
with ± 15 V
@ ± 50 A max
10 100 60 95
W
W
W
W
@ ± 70 A max
@ ± 50 A max
@ ± 70 A max
10
50
60 1) 60 1)
50 160 135 155
50
90 135 2)135 2)
Advantages
ISN
KN
VC
IC
Secondary nominal r.m.s. current
Conversion ratio
Supply voltage (± 5 %)
Current consumption
50
1 : 1000
± 12 .. 15
mA
· Excellent accuracy
· Very good linearity
V
10 (@ ±15V) + IS mA
· Low temperature drift
· Optimized response time
· Wide frequency bandwidth
· No insertion losses
· High immunity to external
interference
Accuracy - Dynamic performance data
X
Accuracy @ IPN , TA = 25°C
@ ± 15 V (± 5 %)
± 0.65
± 0.90
< 0.15
%
%
%
@ ± 12 .. 15 V (± 5 %)
e
Linearity error
L
· Current overload capability.
Typ Max
IO
IOM
IOT
Offset current @ IP = 0, TA = 25°C
± 0.2 mA
± 0.3 mA
± 0.1 ± 0.5 mA
± 0.1 ± 0.6 mA
Applications
Residual current3) @ IP = 0, after an overload of 3 x IPN
Thermal drift of IO
0°C .. + 70°C
- 25°C .. + 85°C
· AC variable speed drives and servo
motor drives
tra
tr
Reaction time @ 10 % of IP max
< 500
< 2.5
> 200
DC .. 100
ns
µs
A/µs
kHz
· Static converters for DC motor drives
· Battery supplied applications
· Uninterruptible Power Supplies
(UPS)
Response time 4) @ 90 % of IP max
di/dt di/dt accurately followed
f
Frequency bandwidth @ 30A (- 3 dB)
· Switched Mode Power Supplies
(SMPS)
· Power supplies for welding
applications.
General data
TA
TS
RS
Ambient operating temperature
Ambient storage temperature
Secondary coil resistance @
- 25 .. + 85
- 40 .. + 90
80
85
24
°C
°C
W
W
g
TA = 70°C
TA = 85°C
Application Domain
m
Mass
Standards
EN 50178 : 1997
· Industrial
1)
Notes : Measuring range limited to ± 60 A
max
max
2)
Measuring range limited to ± 55 A
Result of the coercive field of the magnetic circuit
With a di/dt of 100 A/µs.
3)
4)
060126/7
LEM reserves the right to carry out modifications on its transducers, in order to improve them, without previous notice.
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LEM
www.lem.com