LA25-NPSP11 Datasheet, PDF (1/2 Pages) LEM – Current Transducer LA 25-NP/SP11

Current Transducer LA 25-NP/SP11
For the electronic measurement of currents : DC, AC, pulsed,
mixed, with a galvanic isolation between the primary circuit
(high power) and the secondary circuit (electronic circuit).
I_PN = 1 A
Electrical data
I_PN
Primary nominal r.m.s. current
I_P
Primary current, measuring range
R_M Measuring resistance
with ± 15 V
@ ± 1.0 A _max
@ ± 1.5 A
max
I
Secondary nominal r.m.s. current
SN
K _N Conversion ratio
V
Supply voltage (± 5 %)
C
I_C
Current consumption
V
R.m.s. voltage for AC isolation test, 50 Hz, 1 mn
d
V_b
R.m.s. rated voltage ¹⁾, safe separation
basic isolation
1
A
0 .. ± 1.5
A
R_{M min}
R_{M max}
100 320 Ω
100 190 Ω
25
mA
25 : 1000
± 15
V
10 + I_S
mA
2.5
kV
600
V
1700
V
Accuracy - Dynamic performance data
X
Typical accuracy @ I , T = 25°C
ε_L
Linearity
PN A
± 0.5
%
< 0.2
%
Typ Max
I_O
Offset current ²⁾ @ I_P = 0, T_A = 25°C
± 0.05 ± 0.15 mA
I_OM Residual current ³⁾ @ I_P = 0, after an overload of 3 x I_PN ± 0.05 ± 0.15 mA
I_OT
Thermal drift of I_O
0°C .. + 25°C ± 0.06 ± 0.25 mA
+ 25°C .. + 70°C ± 0.10 ± 0.35 mA
t_r
Response time ⁴⁾ @ 90 % of I_{P max}
f
Frequency bandwidth (- 1 dB)
<1
µs
DC .. 150 kHz
General data
T_A
Ambient operating temperature
T
Ambient storage temperature
S
R _P Primary coil resistance @ T_A = 25°C
R
Secondary coil resistance @ T = 70°C
S
A
L _P Primary insertion inductance
R
Isolation resistance @ 500 V, T = 25°C
IS
A
m
Mass
Standards ⁵⁾
0 .. + 70
°C
- 25 .. + 85
°C
< 51
mΩ
110
Ω
31
µH
> 1500
MΩ
22
g
EN 50178
Notes : ¹⁾ Pollution class 2
2) _{Measurement carried out after 15 mn functionning}
3) _{The result of the coercive field of the magnetic circuit}
4) _{With a di/dt of 100 A/µs}
5) _{A list of corresponding tests is available}
Features
•Closed loop (compensated) multi-
turns current transducer using the
Hall effect
•Insulated plastic case recognized
according to UL 94-V0.
Special features
•I_PN = 1 A
•I_P = 0 .. ± 1.5 A
•K _N = 25 : 1000.
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.
990125/1
LEM Components
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