Current Transducer LA 25-NP
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
= 5-6-8-12-25 A
Electrical data
I
PN
I
P
R
M
Primary nominal r.m.s. current
Primary current, measuring range
Measuring resistance
with ± 15 V
I
SN
K
N
V
C
I
C
V
d
V
b
@ ± 25 At
max
@ ± 36 At
max
25
0 .. ± 36
R
M min
R
M max
100
100
320
190
At
At
Ω
Ω
Features
•
Closed loop (compensated) multi-
range current transducer using the
Hall effect
•
Insulated plastic case recognized
according to UL 94-V0.
Secondary nominal r.m.s. current
Conversion ratio
Supply voltage (± 5 %)
Current consumption
R.m.s. voltage for AC isolation test, 50 Hz, 1 mn
R.m.s. rated voltage
1)
, safe separation
basic isolation
25
mA
1-2-3-4-5 : 1000
± 15
V
10 +
I
S
mA
2.5
kV
600
V
1700
V
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.
Accuracy - Dynamic performance data
X
ε
L
Accuracy @
I
PN
,
T
A
= 25°C
Linearity
Offset current
2)
@
I
P
= 0,
T
A
= 25°C
Residual current
3)
@
I
P
= 0, after an overload of 3 x
I
PN
Thermal drift of
I
O
0°C .. + 25°C
+ 25°C .. + 70°C
Response time @ 90 % of
I
P max
di/dt accurately followed
Frequency bandwidth (- 1 dB)
4)
± 0.5
< 0.2
Typ
± 0.05
± 0.05
± 0.06
± 0.10
Max
± 0.15
± 0.15
± 0.25
± 0.35
%
%
mA
mA
mA
mA
µs
A/µs
kHz
I
O
I
OM
I
OT
t
r
di/dt
f
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.
<1
> 50
DC .. 150
General data
T
A
T
S
R
P
R
S
R
IS
m
Ambient operating temperature
Ambient storage temperature
Primary resistance per turn @
T
A
= 25°C
Secondary coil resistance @
T
A
= 70°C
Isolation resistance @ 500 V,
T
A
= 25°C
Mass
Standards
5)
0 .. + 70
- 25 .. + 85
< 1.25
110
> 1500
22
EN 50178
°C
°C
m
Ω
Ω
MΩ
g
Notes :
1)
2)
3)
4)
5)
Pollution class 2
Measurement carried out after 15 mn functionning
The result of the coercive field of the magnetic circuit
With a di/dt of 100 A/µs
A list of corresponding tests is available
980909/8
LEM Components
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