Current Transducer LA 205-S
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
=
200 A
Electrical data
I
PN
I
P
Î
P max
R
M
Primary nominal r.m.s. current
Primary current, measuring range
Measuring overload
1)
Measuring resistance @
with ± 12 V
with ± 15 V
I
SN
K
N
V
C
I
C
V
b
@ ± 200 A
max
@ ± 300 A
max
@ ± 200 A
max
@ ± 300 A
max
200
0 .. ± 300
600
T
A
= 70°C
T
A
= 85°C
R
M min
R
M max
R
M min
R
M max
0
0
5
5
68
33
95
50
0
0
5
5
66
30
93
49
A
A
A
Features
•
Closed loop (compensated) current
transducer using the Hall effect
•
Insulated plastic case recognized
according to UL 94-V0
•
Patent pending.
Ω
Ω
Ω
Ω
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.
Secondary nominal r.m.s. current
Conversion ratio
Supply voltage (± 5 %)
Current consumption
R.m.s rated voltage
2)
, safe separation
basic isolation
100
mA
1 : 2000
± 12 .. 15
V
20
(@ ± 15 V) +
I
S
mA
1625
V
3250
V
Accuracy - Dynamic performance data
X
G
ε
L
Overall accuracy @
I
PN
,
T
A
= 25°C
Linearity
Offset current @
I
P
= 0,
T
A
= 25°C
Residual current
3)
@
I
P
= 0, after an overload of 3 x
I
PN
Thermal drift of
I
O
- 10°C .. + 85°C
Reaction time @ 10 % of
I
PN
Response time
4)
@ 90 % of
I
PN
di/dt accurately followed
Frequency bandwidth (- 3 dB)
± 0.8
< 0.1
Max
± 0.15
± 0.50
± 0.15 ± 0.30
< 500
<1
> 100
DC .. 100
Typ
%
%
mA
mA
mA
ns
µs
A/µs
kHz
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.
I
O
I
OM
I
OT
t
ra
t
r
di/dt
f
General data
T
A
T
S
R
S
m
Ambient operating temperature
Ambient storage temperature
Secondary coil resistance @
- 10 .. + 85
- 40 .. + 90
35
37
110
EN 50178
°C
°C
Ω
Ω
g
T
A
= 70°C
T
A
= 85°C
Mass
Standards
5)
Notes :
1)
3 mn/hour @
V
C
= ± 15 V,
R
M
= 5
Ω
2)
Pollution class nr 2. W ith a non insulated primary bar which fills the
through-hole
3)
The result of the coercive field of the magnetic circuit
4)
With a di/dt of 100 A/µs
5)
A list of corresponding tests is available
020711/6
LEM Components
w w w .lem.com
Dimensions LA 205-S
(in mm. 1 mm = 0.0394 inch)
Front view
Left view
Connection
Top view
Mechanical characteristics
•
•
•
•
General tolerance
Fastening
Primary through-hole
Connection of secondary
± 0.5 mm
2 holes
∅
5.5 mm
23 x 18 mm
Molex 5046-04/AG
Remarks
•
I
S
is positive when
I
P
flows in the direction of the arrow.
•
Temperature of the primary conductor should not exceed
100°C.
•
Dynamic performances (di/dt and response time) are best
with a single bar completely filling the primary hole.
•
This is a standard model. For different versions (supply
voltages, turns ratios, unidirectional measurements...),
please contact us.
LEM reserves the right to carry out modifications on its transducers, in order to improve them, without previous notice.
Embedded System
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