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LA55-TP-SP27 Datasheet, PDF (1/3 Pages) LEM – Current Transducer | |||
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Current Transducer LA 55-TP/SP27
For the electronic measurement of currents: DC, AC, pulsed...,
with galvanic isolation between the primary circuit (high power) and
the secondary circuit (electronic circuit).
IPN = 50 A
16086
Electrical data
IPN
Primary nominal current rms
IPM Primary current, measuring range
RM Measuring resistance
with ± 12 V
@ ± 50 A max
@ ± 100 A max
with ± 15 V
@ ± 50 A max
@ ± 100 A max
ISN
Secondary nominal current rms
KN Conversion ratio
VC
Supply voltage (± 5 %)
IC
Current consumption
Accuracy - Dynamic performance data
50
A
0 .. ± 100
A
R R M min
M max
0 210
â¦
0
30
â¦
30 320
â¦
30 90
â¦
25
mA
1 : 2000
± 12 .. 15
V
10 (@ ± 15 V)+ IS mA
X
Accuracy @ IPN , TA = 25°C @ ± 15 V (± 5 %)
@ ± 12 .. 15 V (± 5 %)
ε
L
Linearity error
± 0.65
± 0.90
< 0.15
Typ Max
IO
Offset current @ IP = 0, TA = 25°C
IOM
Magnetic offset current 1) @ IP = 0 and specified RM,
after an overload of 3 x IPN
IOT
Temperature variation of IO
- 25°C .. + 85°C ± 0.1
- 40°C .. - 25°C ± 0.2
± 0.1
± 0.2
± 0.3
± 0.5
tra
tr
di/dt
Reaction time to 10 % of IPN step
Response time 2) to 90 % of IPN step
di/dt accurately followed
< 500
< 1
> 200
BW Frequency bandwidth (- 1 dB) DC .. 200
%
%
%
mA
mA
mA
mA
ns
µs
A/µs
kHz
General data
TA
Ambient operating temperature - 40 .. + 85
°C
TS
Ambient storage temperature - 50 .. + 90
°C
RS Secondary coil resistance @ TA = 85°C 140
â¦
m
Mass 35
g
Standards EN 50155: 1995
Features
ââ Closed loop (compensated)
current transducer using the Hall
effect
ââ Mounted on printed circuit board
ââ Insulated plastic case recognized
according to UL 94-V0.
Special features
ââ IPM = 0 .. ± 100 A
ââ KN = 1 : 2000
ââ Vd = 3.6 kV
ââ TA = - 40°C .. + 85°C
ââ Potted.
Advantages
ââ Excellent accuracy
ââ Very good linearity
ââ Low temperature drift
ââ Optimized response time
ââ Wide frequency bandwidth
ââ No insertion losses
ââ High immunity to external
interference
ââ Current overload capability.
Applications
ââ Single or three phases inverter
ââ Propulsion and braking chopper
ââ Propulsion converter
ââ Auxiliart converter
ââ Battery charger.
Application domain
ââ Traction.
Notes: 1) Result of the coercive field of the magnetic circuit
2) With a di/dt of 100 A/µs.
090616/4
LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice.
Page 1/3
www.lem.com
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