LA35-NP_06 Datasheet, PDF (1/2 Pages) LEM – Current Transducer

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).
I_PN = 7-8-11-17-35 A
Electrical data
16136
I
Primary nominal r.m.s. current
PN
I_P
Primary current, measuring range
R
Measuring resistance
M
with ± 15 V
@ ± 35 At _max
@ ± 70 At _max
I_SN
Secondary nominal r.m.s. current
K _N Conversion ratio
V_C Supply voltage (± 5 %)
I_C
Current consumption
V_d
R.m.s. voltage for AC isolation test, 50 Hz, 1 mn
V_b
R.m.s. rated voltage ²⁾, safe separation
basic isolation
35 ¹⁾
At
0 .. ± 70
At
R
M min
R
M max
60
150 Ω
60
85 Ω
35
mA
1-2-3-4-5 : 1000
± 15
V
10 + I_S
mA
2.5
kV
600
V
1700
V
Accuracy - Dynamic performance data
X
ε_L
I_O
I
OM
I_OT
t_r
di/dt
f
Typical accuracy @ I T = 25°C
PN, A
Linearity
± 0.5
%
< 0.2
%
Typ Max
Offset current ³⁾ @ I_P = 0, T_A = 25°C
± 0.10 ± 0.20 mA
Residual current ⁴⁾ @ I = 0, after an overload of 3 x I ± 0.05 ± 0.15 mA
P
PN
Thermal drift of I_O
- 25°C .. + 70°C ± 0.15 ± 0.50 mA
Response time ⁵⁾ @ 90 % of I_PN
di/dt accurately followed
<1
> 50
µs
A/µs
Frequency bandwidth (- 1 dB)
DC .. 150
kHz
General data
T
Ambient operating temperature
A
T_S
Ambient storage temperature
R
Primary resistance per turn @ T = 25°C
P
A
R _S Secondary coil resistance @ T_A = 70°C
R
Isolation resistance @ 500 V, T = 25°C
IS
A
m
Mass
Standards
- 25 .. + 70
°C
- 40 .. + 85
°C
< 1.25
mΩ
80
Ω
> 1500
MΩ
22
g
EN 50178 : 1997
Features
• Closed loop (compensated) multi-
range current transducer using the
Hall effect
• Printed circuit board mounting
• Insulated plastic case recognized
according to UL 94-V0.
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.
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.
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.}
060719/4
LEM Components
www.lem.com