LF205-P Datasheet, PDF (1/2 Pages) LEM – Current Transducer LF 205-P

Current Transducer LF 205-P
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
I_PN
Primary nominal r.m.s. current
I_P
Primary current, measuring range
R_M Measuring resistance @
200
A
0 .. ± 420
A
T_A = 70°C T_A = 85°C
R_{M min} R_{M max} R_{M min} R_{M max}
with ± 12 V
with ± 15 V
@ ± 200 A _max
@ ± 420 A _max
@ ± 200 A _max
@ ± 420 A _max
0 71 0 69 Ω
0 14 0 12 Ω
0 100 23 98 Ω
0 28 23 26 Ω
I_SN Secondary nominal r.m.s. current
K_N Conversion ratio
V_C Supply voltage (± 5 %)
I_C
Current consumption @ ± 15V
V_d
R.m.s. voltage for AC isolation test, 50 Hz, 1 mn
100
mA
1 : 2000
± 12 .. 15
V
17 + I_S
mA
3.5
kV
Accuracy - Dynamic performance data
εX G
L
I_O
I_OM
I_OT
t_ra
t_r
di/dt
f
Overall accuracy @ I_PN , T_A = 25°C
Linearity
± 0.5
%
< 0.1
%
Offset current @ I_P = 0, T_A = 25°C
Residual current ¹⁾ @ I_P = 0, after an overload of 3 x I_PN
Thermal drift of I_O
- 40°C .. + 85°C
Reaction time @ 10 % of I_{P max}
Response time²⁾ @ 90 % of I_{P max}
di/dt accurately followed
Frequency bandwidth (- 3 dB)
Typ
± 0.12
Max
± 0.2
± 0.1
± 0.4
< 500
<1
> 100
DC .. 100
mA
mA
mA
ns
µs
A/µ s
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 ³⁾
- 40 .. + 85
°C
- 40 .. + 90
°C
33
Ω
35
Ω
58
g
EN 50178
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.
Notes : ¹⁾ The result of the coercive field of the magnetic circuit
2) _{With a di/dt of 100 A/µs}
3) _{A list of corresponding tests is available.}
LEM Components
011120/2
w w w.lem.com