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LA25-NP-SP7 Datasheet, PDF (1/3 Pages) LEM – Current Transducer | |||
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Current Transducer LA 25-NP/SP7
For the electronic measurement of currents: DC, AC, pulsed...,
with galvanic isolation between the primary circuit and the secondary
circuit.
IPN = 2.5 A
16160
Electrical data
IPN
Primary nominal current rms
IPM
Primary current, measuring range
RM
Measuring resistance
with ± 15 V
@ ± 2.5 A max
@ ± 3.6 A max
ISN
Secondary nominal current rms
KN
Conversion ratio
VC
Supply voltage (± 5 %)
IC
Current consumption
Accuracy - Dynamic performance data
2.5
A
0 .. ± 3.6
A
R R M min
M max
100 320
â¦
100 190
â¦
25
mA
10 : 1000
± 15
V
10 + IS
mA
X
ε
L
IO
IOM
IOT
tr
di/dt
BW
Accuracy @ IPN, TA = 25°C
Linearity error
Offset current 1) @ IP = 0, TA = 25°C
Magnetic offset current 2) @ IP = 0 and specified RM,
after an overload of 3 x IPN
Temperature variation of IO
0°C .. + 25°C
+ 25°C .. + 70°C
Response time 3) to 90 % of IPN step
di/dt accurately followed
Frequency bandwidth (- 1 dB)
± 0.5
< 0.2
Typ Max
± 0.05 ± 0.15
± 0.05 ± 0.15
± 0.06 ± 0.25
± 0.10 ± 0.35
< 1
> 50
DC .. 150
%
%
mA
mA
mA
mA
µs
A/µs
kHz
General data
TA
Ambient operating temperature
TS
Ambient storage temperature
RP
Primary coil resistance
@ TA = 25°C
RS
Secondary coil resistance
@ TA = 70°C
LP
Insertion inductance
RIS
Isolation resistance @ 500 V, TA = 25°C
m
Mass
Standards
0 .. + 70
°C
- 25 .. + 85
°C
< 8.5
mâ¦
110
â¦
5.5
µH
> 1500
Mâ¦
22
g
EN 50178: 1997
Notes: 1) Measurement carried out after 15 mn functioning
2) The result of the coercive field of the magnetic circuit
3) With a di/dt of 100 A/µs.
Features
ââ Closed loop (compensated)
current transducer using the Hall
effect
ââ Isolated plastic case recognized
according to UL 94-V0.
Special features
ââ IPN = 2.5 A
ââ IPM = 0 .. ± 3.6 A
ââ KN = 10 : 1000.
Advantages
ââ Excellent accuracy
ââ Very good linearity
ââ Low temperature drift
ââ Optimized response time
ââ Wide frequency bandwidth
ââ No insertion losses
ââ High immunity to external
interference
ââ Current overload capability.
Applications
ââ AC variable speed drives and
servo motor drives
ââ Static converters for DC motor
drives
ââ Battery supplied applications
ââ Uninterruptible Power Supplies
(UPS)
ââ Switched Mode Power Supplies
(SMPS)
ââ Power supplies for welding
applications.
Application domain
ââ Industrial.
9November2011/version 5
LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice
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www.lem.com
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