LF205-S_13 Datasheet, PDF (1/3 Pages) LEM – Current Transducer

Current Transducer LF 205-S
For the electronic measurement of currents: DC, AC, pulsed...,
with galvanic separation between the primary circuit and the secondary
circuit.
I_PN = 200 A
Electrical data
I_PN
Primary nominal rms current
I_PM
Primary current, measuring range
R_M
Measuring resistance @

with ± 12 V
@ ± 200 A _max

@ ± 420 A _max
with ± 15 V
@ ± 200 A _max

@ ± 420 A _max
I_SN
Secondary nominal rms current
K_N
Conversion ratio
U_C
Supply voltage (+ 5 %)
I_C
Current consumption @ ± 15 V
200
A
0 .. ± 420
A
T_A = 70 °C T_A = 85 °C
R R R R _{M min}
M max
M min
M max
0 71 0 69 Ω
0 14 0 12 Ω
0 100 23 98 Ω
0 28 23 26 Ω
100
mA
1 : 2000
± 12 .. 15
V
17 + I_S
mA
Accuracy - Dynamic performance data
X_G
Overall accuracy @ I_PN, T_A = 25 °C
ε_L
Linearity error

± 0.5
%
< 0.1
%
Typ Max
I_O
Offset current @ I_P = 0, T_A = 25 °C
± 0.2 mA
I_OM
Magnetic offset current ¹⁾ @ I_P = 0 and specified R_M,
after an overload of 3 x I_PN
± 0.1 mA
I
OT
Temperature
variation
of
I
O
- 40 °C .. + 85 °C ± 0.12 ± 0.4 mA
t_ra
Reaction time to 10 % of I_PN step
< 500
ns
t_r
Response time ²⁾ to 90 % of I_PN step
< 1
µs
di/dt di/dt accurately followed
> 100
A/µs
BW Frequency bandwidth (- 3 dB)
DC .. 100
kHz
General data
T_A
Ambient operating temperature
T_S
Ambient storage temperature
R_S
Secondary coil resistance
@ T_A = 70 °C
@ T_A = 85 °C
m
Mass
Standard
- 40 .. + 85
°C
- 40 .. + 90
°C
33
Ω
35
Ω
78
g
EN 50178: 1997
Features
●● Closed loop (compensated)
current transducer using the Hall
effect
●● Insulating 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⁾ The result of the coercive force (Hc) of the magnetic circuit
²⁾ With a di/dt of 100 A/µs.
Nº 97.14.44.000.0
8June2013/version 17
LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice
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