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 鹵 15 V
I
SN
K
N
V
C
I
C
V
d
V
b
@ 鹵 25 At
max
@ 鹵 36 At
max
25
0 .. 鹵 36
R
M min
R
M max
100
100
320
190
At
At
鈩?/div>
鈩?/div>
Features
鈥?/div>
Closed loop (compensated) multi-
range current transducer using the
Hall effect
鈥?/div>
Insulated plastic case recognized
according to UL 94-V0.
Secondary nominal r.m.s. current
Conversion ratio
Supply voltage (鹵 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
鹵 15
V
10 +
I
S
mA
2.5
kV
600
V
1700
V
Advantages
鈥?/div>
Excellent accuracy
鈥?/div>
Very good linearity
鈥?/div>
Low temperature drift
鈥?/div>
Optimized response time
鈥?/div>
Wide frequency bandwidth
鈥?/div>
No insertion losses
鈥?/div>
High immunity to external
interference
鈥?/div>
Current overload capability.
Accuracy - Dynamic performance data
X
蔚
L
Accuracy @
I
PN
,
T
A
= 25擄C
Linearity
Offset current
2)
@
I
P
= 0,
T
A
= 25擄C
Residual current
3)
@
I
P
= 0, after an overload of 3 x
I
PN
Thermal drift of
I
O
0擄C .. + 25擄C
+ 25擄C .. + 70擄C
Response time @ 90 % of
I
P max
di/dt accurately followed
Frequency bandwidth (- 1 dB)
4)
鹵 0.5
< 0.2
Typ
鹵 0.05
鹵 0.05
鹵 0.06
鹵 0.10
Max
鹵 0.15
鹵 0.15
鹵 0.25
鹵 0.35
%
%
mA
mA
mA
mA
碌s
A/碌s
kHz
I
O
I
OM
I
OT
t
r
di/dt
f
Applications
鈥?/div>
AC variable speed drives and servo
motor drives
鈥?/div>
Static converters for DC motor drives
鈥?/div>
Battery supplied applications
鈥?/div>
Uninterruptible Power Supplies
(UPS)
鈥?/div>
Switched Mode Power Supplies
(SMPS)
鈥?/div>
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擄C
Secondary coil resistance @
T
A
= 70擄C
Isolation resistance @ 500 V,
T
A
= 25擄C
Mass
Standards
5)
0 .. + 70
- 25 .. + 85
< 1.25
110
> 1500
22
EN 50178
擄C
擄C
m
鈩?/div>
鈩?/div>
M鈩?/div>
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/碌s
A list of corresponding tests is available
980909/8
LEM Components
w w w .lem.com
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