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LA35-NP Datasheet, PDF (1/2 Pages) LEM – Current Transducer LA 35-NP | |||
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Current Transducer LA 35-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).
IPN = 7-8-11-17-35 A
Electrical data
IPN
Primary nominal r.m.s. current
I
Primary current, measuring range
P
RM Measuring resistance
with ± 15 V
@ ± 35 At max
@ ± 70 At
max
ISN
Secondary nominal r.m.s. current
K N Conversion ratio
VC Supply voltage (± 5 %)
IC
Current consumption
Vd
R.m.s. voltage for AC isolation test, 50 Hz, 1 mn
Vb
R.m.s. rated voltage 2), safe separation
basic isolation
35 1)
At
0 .. ± 70
At
RM min
RM max
60
320 â¦
60
85
â¦
35
mA
1-2-3-4-5 : 1000
± 15
V
10 + IS
mA
2.5
kV
600
V
1700
V
Accuracy - Dynamic performance data
X
εL
I
O
IOM
I
OT
tr
di/dt
f
Accuracy @ IPN , TA = 25°C
Linearity
± 0.5
%
< 0.2
%
Typ Max
Offset current 3) @ I = 0, T = 25°C
P
A
± 0.10 ± 0.20 mA
Residual current 4) @ IP = 0, after an overload of 3 x IPN ± 0.05 ± 0.15 mA
Thermal drift of I
O
- 25°C .. + 70°C ± 0.15 ± 0.50 mA
Response time 5) @ 90 % of IP max
di/dt accurately followed
<1
> 50
µs
A/µs
Frequency bandwidth (- 1 dB)
DC .. 150
kHz
General data
TA
Ambient operating temperature
T
Ambient storage temperature
S
R P Primary resistance per turn @ TA = 25°C
R
Secondary coil resistance @ T = 70°C
S
A
R IS Isolation resistance @ 500 V, TA = 25°C
m
Mass
Standards 6)
- 25 .. + 70
°C
- 40 .. + 85
°C
< 1.25
mâ¦
80
â¦
> 1500
Mâ¦
22
g
EN 50178
Features
â¢Closed loop (compensated) multi-
range current transducer using the
Hall effect
â¢Insulated plastic case recognized
according to UL 94-V0.
Advantages
â¢Excellent accuracy
â¢Very good linearity
â¢Low temperature drift
â¢Optimized response time
â¢Wide frequency bandwidth
â¢No insertion losses
â¢High immunity to external
interference
â¢Current overload capability.
Applications
â¢AC variable speed drives and servo
motor drives
â¢Static converters for DC motor drives
â¢Battery supplied applications
â¢Uninterruptible Power Supplies
(UPS)
â¢Switched Mode Power Supplies
(SMPS)
â¢Power supplies for welding
applications.
Notes : 1) In order to avoid over-heating, it is necessary that the recommended
primary connections be followed (see table page 2)
2) Pollution class 2
3) Measurement carried out after 15 mn functioning
4) The result of the coercive field of the magnetic circuit
5) With a di/dt of 100 A/µs
6) A list of corresponding tests is available
980909/1
LEM Components
w w w .lem.com
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