LF205-S_06 Datasheet, PDF (1/3 Pages) LEM – Current Transducer

Current Transducer LF 205-S
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).
I_PN = 200 A
Electrical data
16135
I
Primary nominal r.m.s. current
PN
I_P
Primary current, measuring range
R
Measuring resistance @
M
with ± 12 V
with ± 15 V
@ ± 200 A _max
@ ± 420 A _max
@ ± 200 A _max
@ ± 420 A
max
I_SN
Secondary nominal r.m.s. current
K _N Conversion ratio
V_C Supply voltage (± 5 %)
I_C
Current consumption @ ± 15 V
200
A
0 .. ± 420
A
T = 70°C T = 85°C
A
A
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
εG
L
I
O
I_OM
I
OT
t_ra
t_r
di/dt
f
Overall accuracy @ I , T = 25°C
PN A
Linearity error
± 0.5
%
< 0.1
%
Typ Max
Offset current @ I = 0, T = 25°C
P
A
± 0.2 mA
Residual current ¹⁾ @ I_P = 0, after an overload of 3 x I_PN
± 0.1 mA
Thermal drift of I
O
- 40°C .. + 85°C ± 0.12 ± 0.4 mA
Reaction time @ 10 % of I_PN
Response time ²⁾ @ 90 % of I_PN
di/dt accurately followed
< 500
<1
> 100
ns
µs
A/µ s
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
Standards
- 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
• 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
• Industry.
Notes : ¹⁾ The result of the coercive field of the magnetic circuit
2) _{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.
060522/11
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