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LA25-NP14 Datasheet, PDF (1/2 Pages) LEM – Current Transducer LA 25-NP/SP14 | |||
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Current Transducer LA 25-NP/SP14
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).
IPN = 0.25 A
Electrical data
IPN
Primary nominal r.m.s. current
IP
Primary current, measuring range
RM Measuring resistance
with ± 15 V
@ ± 0.25 A max
@ ± 0.36 A
max
I
Secondary nominal r.m.s. current
SN
K N Conversion ratio
V
Supply voltage (± 5 %)
C
IC
Current consumption
V
R.m.s. voltage for AC isolation test, 50 Hz, 1 mn
d
Vb
R.m.s. rated voltage 1), safe separation
basic isolation
0.25
A
0 .. ± 0.36
A
RM min
RM max
100 320 â¦
100 190 â¦
25
mA
100 : 1000
± 15
V
10 + IS
mA
2.5
kV
600
V
1700
V
Accuracy - Dynamic performance data
X
Typical accuracy @ I , T = 25°C
εL
Linearity
PN A
± 0.5
%
< 0.2
%
Typ Max
IO
Offset current 2) @ IP = 0, TA = 25°C
± 0.05 ± 0.15 mA
IOM Residual current 3) @ IP = 0, after an overload of 3 x IPN ± 0.05 ± 0.15 mA
IOT
Thermal drift of IO
- 10°C .. + 70°C ± 0.10 ± 0.35 mA
tr
Response time 4) @ 90 % of IP max
f
Frequency bandwidth (- 1 dB)
<1
µs
DC .. 150 kHz
General data
T
Ambient operating temperature
A
TS
Ambient storage temperature
R
Primary coil resistance @ T = 25°C
P
A
R S Secondary coil resistance @ TA = 70°C
L
Primary insertion inductance
P
R IS Isolation resistance @ 500 V, TA = 25°C
m
Mass
Standards 5)
- 10 .. + 70
°C
- 25 .. + 85
°C
< 745
mâ¦
110
â¦
496
µH
> 1500
Mâ¦
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
â¢Closed loop (compensated) multi-
turns current transducer using the
Hall effect
â¢Insulated plastic case recognized
according to UL 94-V0.
Special features
â¢IPN = 0.25 A
â¢IP = 0 .. ± 0.36 A
â¢K N = 100 : 1000
â¢TA = - 10°C .. + 70°C.
Advantages
â¢Excellent accuracy
â¢Very good linearity
â¢Low temperature drift
â¢Optimized response time
â¢Wide frequency bandwidth
â¢No insertion losses
â¢High immunity to external
interference
â¢Current overload capability.
Applications
â¢AC variable speed drives and servo
motor drives
â¢Static converters for DC motor drives
â¢Battery supplied applications
â¢Uninterruptible Power Supplies
(UPS)
â¢Switched Mode Power Supplies
(SMPS)
â¢Power supplies for welding
applications.
990126/2
LEM Components
w w w .lem.com
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