Current Transducer LAH 25-NP
IPN = 8-12-25 A
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).
Electrical data
IPN
IP
RM
Primary nominal r.m.s. current
Primary current, measuring range
Measuring resistance @
25
0 .. 55
TA = 70°C
RM min RMmax RM min RMmax
At
At
Features
1)
TA = 85°C
· Closed loop (compensated) multi-
range current transducer using the
Hall effect
· Printed circuit board mounting
· Insulated plastic case recognized
according to UL 94-V0.
with ± 12 V
with ± 15 V
@ IPN [± At DC
@ IPN [At RMS
@ IPN [± At DC
]
0
0
257
155
0
0
252
150
W
W
W
W
2)
]
]
2)
67 371 70 366
67 236 70 231
@ IPN [At RMS
@ IP < IPN
]
3)
Advantages
ISN
KN
VC
IC
Vd
Vb
Secondary nominal r.m.s. current
Conversion ratio
Supply voltage (± 5 %)
Current consumption
R.m.s. voltage for AC isolation test, 50/60 Hz, 1 mn
R.m.s. rated voltage 4)
25
mA
V
1 - 2 - 3 : 1000
± 12 .. 15
10 (@ ± 15V) + IS mA
5
600
· Excellent accuracy
· Very good linearity
· Low temperature drift
· Optimized response time
· Wide frequency bandwidth
· No insertion losses
· High immunity to external
interference
kV
V
Accuracy - Dynamic performance data
X
Accuracy5) @ IPN, TA = 25°C
Linearity
± 0.3
< 0.2
%
%
· Current overload capability.
e
L
Typ Max
Applications
IO
Offset current @ TA = 25°C
± 0.15 mA
IOM
IOT
Residual current@ IP = 0, after an overload of 5 x IPN ± 0.20 ± 0.25 mA
· AC variable speed drives and servo
motor drives
· Static converters for DC motor drives
· Battery supplied applications
· Uninterruptible Power Supplies
(UPS)
Thermal drift of IO
0°C .. + 70°C
- 25°C .. + 85°C
± 0.10 ± 0.60 mA
± 0.10 ± 0.70 mA
tr a
tr
Reaction time @ 10 % of IPN
Response time 6) @ 90 % of IPN
< 200
< 500
ns
ns
di/dt di/dt accurately followed
f
> 200
DC .. 200
A/µs
kHz
Frequency bandwidth (- 1 dB)
· Switched Mode Power Supplies
(SMPS)
General data
· Power supplies for welding
applications.
TA
TS
RS
Ambient operating temperature
Ambient storage temperature
Secondary coil resistance
- 25 .. + 85
- 40 .. + 90
99
104
20
°C
°C
W
W
g
@ TA = 70°C
@ TA = 85°C
m
Mass
Standards
7)
EN 50178
Notes : 1)During 10 s, with RM £ 109 W (VC = ± 15 V) - 2) 50 Hz Sinusoidal -
3) The measuring resistance RM min may be lower (see "LAH Technical Informa-
tion" leaflet) - 4) Pollution class 2, cat. III - 5) Without IO & IOM - 6) With a di/dt of
100 A/µs - 7) A list of corresponding tests is available.
010822/3
LEM Components
www.lem.com