LA125-P_06 Datasheet, PDF (1/2 Pages) LEM – Current Transducer

Current Transducer LA 125-P
For the electronic measurement of currents : DC, AC, pulsed...,
with a galvanic isolation between the primary circuit (high power)
and the secondary circuit (electronic circuit).
I_PN = 125 A
Electrical data
16030
I_PN Primary nominal r.m.s. current
I_P
Primary current, measuring range
R_M Measuring resistance @
125
A
0 .. ± 200
A
T_A = 70°C T_A = 85°C
R R R R _{M min Mmax M min Mmax}
with ± 12 V
with ± 15 V
@ ± 125 A _max
@ ± 200 A _max
@ ± 125 A _max
@ ± 200 A _max
5 52
5 20
25 74
25 34
14 50 Ω
14 18 Ω
40 72 Ω
40¹⁾ 40 ¹⁾ Ω
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
125
mA
1 : 1000
± 12 .. 15
V
16 (@ ± 15 V) + I_S m A
3
kV
Accuracy - Dynamic performance data
X
Accuracy @ I_PN , T_A = 25°C
@ ± 15 V (± 5 %) ± 0.60
%
@ ± 12 .. 15 V (± 5 %) ± 0.80
%
ε _L Linearity error
< 0.15
%
Typ Max
I_O
Offset current @ I_P = 0, T_A = 25°C
± 0.40 m A
I_OM Residual current ²⁾ @ I_P = 0, after an overload of 3 x I_PN
± 0.50 m A
I_OT
Thermal drift of I_O
0°C .. + 70°C ± 0.15 ± 0.50 m A
- 40°C .. + 85°C ± 0.30 ± 0.95 m A
t_ra
t_r
di/dt
f
Reaction time @ 10 % of I_PN
Response time ^{3) 4)} @ 90 % of I_PN
di/dt accurately followed ⁴⁾
Frequency bandwidth ⁴⁾ (- 1 dB)
< 500
<1
> 200
DC .. 100
ns
µs
A/µs
kHz
General data
T_A Ambient operating temperature
T_S Ambient storage temperature
R _S Secondary coil resistance @
m Mass
Standards
T_A = 70°C
T_A = 85°C
- 40 .. + 85
°C
- 40 .. + 90
°C
32
Ω
33.5
Ω
40
g
EN 50178 : 1997
Features
• Closed loop (compensated) 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⁾ Measuring range limited to ± 180 A _max
2) _{The result of the coercive field of the magnetic circuit.}
3) _{With a di/dt of 100 A/µs}
4) _{The primary conductor is best filling the through-hole and/or the return}
of the primary conductor is above the top of the transducer.
LEM
LEM reserves the right to carry out modifications on its transducers, in order to improve them, without previous notice.
060213/10
page 1/2
www.lem.com