LA25-NPSP7 LEM, LA25-NPSP7 Datasheet
LA25-NPSP7
Manufacturer Part Number
LA25-NPSP7
Description
Current Transducer LA 25-NP/SP7
Manufacturer
LEM
Datasheet
1.LA25-NPSP7.pdf
(2 pages)
Current Transducer LA 25-NP/SP7
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
I
R
I
K
V
I
V
V
X
I
I
I
t
f
T
T
R
R
L
R
m
Notes :
LEM Components
PN
P
SN
OT
C
O
OM
r
C
A
S
d
b
M
P
N
L
P
S
IS
Electrical data
Accuracy - Dynamic performance data
General data
Primary nominal r.m.s. current
Primary current, measuring range
Measuring resistance
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
Typical accuracy @ I
Linearity
Offset current
Residual current
Thermal drift of I
Response time
Frequency bandwidth (- 1 dB)
Ambient operating temperature
Ambient storage temperature
Primary coil resistance @ T
Secondary coil resistance @ T
Primary insertion inductance
Isolation resistance @ 500 V, T
Mass
Standards
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
with ± 15 V
5)
2)
4)
@ I
3)
O
@ 90 % of I
@ I
P
= 0, T
PN
1)
, safe separation
P
, T
= 0, after an overload of 3 x I
basic isolation
A
A
@ ± 2.5 A
@ ± 3.6 A
= 25°C
= 25°C
A
P max
= 25°C
A
A
= 70°C
= 25°C
+ 25°C .. + 70°C
max
max
0°C .. + 25°C
PN
100
100
± 0.05 ± 0.15
± 0.05 ± 0.15
± 0.06 ± 0.25
± 0.10 ± 0.35
2.5
0 .. ± 3.6
R
25
10 : 1000
± 15
10 + I
2.5
600
1700
± 0.5
< 0.2
< 1
DC .. 150
0 .. + 70
- 25 .. + 85
< 8.5
110
5.5
> 1500
22
EN 50178
Typ
M min
S
Max
320
190
R
M max
kHz
m
M
mA
mA
mA
mA
mA
mA
µ H
kV
µs
°C
°C
%
%
A
A
V
V
V
g
I
Features
Special features
Advantages
Applications
PN
Closed loop (compensated) multi-
turns current transducer using the
Hall effect
Insulated plastic case recognized
according to UL 94-V0.
I
I
K
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.
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.
PN
P
N
= 2.5 A
= 0 .. ± 3.6 A
= 10 : 1000.
=
2.5 A
w w w .lem.com
990125/2
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LA25-NPSP7 Summary of contents
Page 1
... Current overload capability. kHz Applications AC variable speed drives and servo °C motor drives °C Static converters for DC motor drives m Battery supplied applications Uninterruptible Power Supplies µ H (UPS) M Switched Mode Power Supplies g (SMPS) Power supplies for welding applications. 990125 .lem.com ...
Page 2
... Mechanical characteristics General tolerance Fastening & connection of primary Fastening & connection of secondary 3 pins Recommended PCB hole LEM reserves the right to carry out modifications on its transducers, in order to improve them, without previous notice. (in mm 0.0394 inch) Right view Secondary terminals Terminal + : supply voltage + 15 V ...