Current Transducer LAH 50-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
= 50 A
16010
Electrical data
I
PN
I
P
R
M
Primary nominal r.m.s. current
Primary current, measuring range
Measuring resistance @
with ± 12 V
with ± 15 V
I
SN
K
N
V
C
I
C
V
d
V
e
V
w
X
@
@
@
@
1)
50
0 .. 110
T
A
= 70°C
T
A
= 85°C
R
M min
R
M max
R
M min
R
M max
0
0
0
0
221
115
335
195
0
0
0
0
214
108
327
188
A
A
Features
•
Closed loop (compensated) current
transducer using the Hall effect
•
Printed circuit board mounting
•
Insulated plastic case recognized
according to UL 94-V0.
I
PN
[± A
DC
]
I
PN
[A
RMS
]
2)
I
PN
[± A
DC
]
I
PN
[A
RMS
]
2)
Ω
Ω
Ω
Ω
mA
V
mA
kV
kV
kV
Secondary nominal r.m.s. current
25
Conversion ratio
1 : 2000
Supply voltage (± 5 %)
± 12 .. 15
Current consumption
10
(@ ± 15V) +
R.m.s. voltage for AC isolation test, 50/60 Hz, 1 mn
5
R.m.s. voltage for partial discharge extinction @ 10 pC > 2
Impulse withstand voltage 1.2/50 µs
> 12
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.
I
S
Accuracy - Dynamic performance data
ε
L
Accuracy
3)
@
I
PN,
T
A
= 25°C
Linearity
Offset current @
T
A
= 25°C
Residual current @
I
P
= 0, after an overload of 5 x
I
PN
Thermal drift of
I
O
0°C .. + 70°C
- 25°C .. + 85°C
Reaction time @ 10 % of
I
PN
Response time
4)
@ 90 % of
I
PN
di/dt accurately followed
Frequency bandwidth (- 1 dB)
± 0.25
< 0.15
Max
± 0.15
± 0.10 ± 0.15
± 0.10 ± 0.30
± 0.10 ± 0.40
< 200
< 500
> 200
DC .. 200
Typ
%
%
mA
mA
mA
mA
ns
ns
A/µs
kHz
I
O
I
OM
I
OT
t
r a
t
r
di/dt
f
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.
General data
T
A
T
S
R
S
Ambient operating temperature
Ambient storage temperature
Secondary coil resistance
Insulating material group
Mass
Standards
5)
1)
2)
3)
4)
5)
@
T
A
= 70°C
@
T
A
= 85°C
m
- 25 .. + 85
- 40 .. + 90
135
142
I
22
EN 50178
°C
°C
Ω
Ω
g
Notes :
For 10 s, with
R
M
≤
71
Ω
(V
C
= ± 15 V)
50 Hz Sinusoidal
Without
I
O
&
I
OM
With a di/dt of 100 A/µs
A list of corresponding tests is available.
060124/7
LEM reserves the right to carry out modifications on its transducers, in order to improve them, without previous notice.
page 1/3
LEM
w w w .lem.com
Dimensions LAH 50-P
(in mm. 1 mm = 0.0394 inch)
Connection
Bottom view
Left view
Front view
Number
of primary
t u r n s
Primary current
nominal
maximum
N o m i n a l
output current
Turns
r a t i o
Primary
resistance
Primary insertion
i n d u c t a n c e
I
PN
[ A ]
50
I
P
[A]
I
SN
[ mA ]
K
N
1 : 2000
R
P
[ mΩ ]
L
P
0.008
[ µH ]
1
110
25
0.12
Mechanical characteristics
•
General tolerance
•
Fastening & connection of primary
Recommended PCB hole
•
Fastening & connection of secondary
Recommended PCB hole
± 0.2 mm
6 pins 1.4 x 1 mm
2 mm
3 pins 0.7 x 0.6 mm
1.2 mm
Remarks
•
I
S
is positive when
I
P
flows from terminals "IN" to terminals
"OUT".
•
The jumper temperature and PCB should not exceed 100°C.
•
This is a standard model. For different versions (supply
voltages, turns ratios, unidirectional measurements...),
please contact us.
060124/7
LEM reserves the right to carry out modifications on its transducers, in order to improve them, without previous notice.
page 2/3
LEM
w w w .lem.com
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