Datasheet

LEM reserves the right to carry out modications on its transducers, in order to improve them, without prior notice.
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090608/13
I
PN
= 125 A
Features
Closed loop (compensated) ●
current transducer using the Hall
effect
Printed circuit board mounting ●
Isolated 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.
Application domain
Industrial. ●
Current Transducer LA 125-P
For the electronic measurement of currents: DC, AC, pulsed...,
with galvanic isolation between the primary circuit (high power) and
the secondary circuit (electronic circuit).
Electrical data
I
PN
Primary nominal current rms 125 A
I
PM
Primary current, measuring range 0 .. ± 200 A
R
M
Measuring resistance T
A
= 70°C T
A
= 85°C
R
M min
R
M max
R
M min
R
M max
with ± 12 V @ ± 125 A
max
5 52 14 50 Ω
@ ± 200 A
max
5 20 14 18 Ω
with ± 15 V @ ± 125 A
max
25 74 40 72 Ω
@ ± 200 A
max
25 34 40
1)
40
1)
Ω
I
SN
Secondary nominal current rms 125 mA
K
N
Conversion ratio 1 : 1000
V
C
Supply voltage (± 5 %) ± 12 .. 15 V
I
C
Current consumption 16 (@ ± 15 V) + I
S
mA
X Accuracy @ I
PN
, T
A
= 25°C @ ± 15 V (± 5 %) ± 0.60 %
Accuracy - Dynamic performance data
@ ± 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 mA
I
OM
Magnetic offset current
2)
@ I
P
= 0 and specied R
M
,
after an overload of 3 x I
PN
± 0.50 mA
I
OT
Temperature variation of I
O
0°C .. + 70°C ± 0.15 ± 0.50 mA
- 40°C .. + 85°C ± 0.30 ± 0.95 mA
t
ra
Reaction time to 10 % of I
PN
< 500 ns
t
r
Response time
3) 4)
to 90 % of I
PN
step < 1 µs
di/dt di/dt accurately followed
4)
> 200 A/µs
BW Frequency bandwidth
4)
(- 1 dB) DC .. 100 kHz
T
A
Ambient operating temperature - 40 .. + 85 °C
General data
T
S
Ambient storage temperature - 40 .. + 90 °C
R
S
Secondary coil resistance @ T
A
= 70°C 32 Ω
  @ T
A
= 85°C 33.5 Ω
m Mass 40 g
Standards EN 50178: 1997
Notes:
1)
Measuring range limited to ± 180 A
max
2)
Result of the coercive eld of the magnetic circuit
3)
With a di/dt of 100 A/µs
4)
The primary conductor is best lling the through-hole and/or the return of
the primary conductor is above the top of the transducer.
16030