Current Transducer LA 305-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
=
300 A
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
b
@ ± 300 A
max
@ ± 500 A
max
@ ± 300 A
max
@ ± 500 A
max
300
0 .. ± 500
T
A
= 70°C
T
A
= 85°C
R
M min
R
M max
R
M min
R
M max
0
0
0
0
52
17
75
31
0
0
5
5
50
15
73
29
A
A
Features
•
Closed loop (compensated) current
transducer using the Hall effect
•
Insulated plastic case recognized
according to UL 94-V0
•
Copyright protected.
Ω
Ω
Ω
Ω
Secondary nominal r.m.s. current
Conversion ratio
Supply voltage (± 5 %)
Current consumption
R.m.s. rated voltage
1)
, safe separation
basic isolation
120
mA
1 : 2500
± 12 .. 15
V
20
(@ ± 15 V) +
I
S
mA
1750
V
3500
V
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.
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
2)
@
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
P max
Response time
3)
@ 90 % of
I
P max
di/dt accurately followed
Frequency bandwidth (- 3 dB)
± 0.8
< 0.1
Max
± 0.20
± 0.40
± 0.12 ± 0.30
< 500
<1
> 100
DC .. 100
Typ
%
%
mA
mA
mA
ns
µs
A/µs
kHz
I
O
I
OM
I
OT
t
ra
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
m
Ambient operating temperature
Ambient storage temperature
Secondary coil resistance @
Mass
Standards
- 10 .. + 85
- 40 .. + 90
35
37
200
EN 50178
°C
°C
Ω
Ω
g
T
A
= 70°C
T
A
= 85°C
4)
Notes :
1)
2)
3)
4)
Pollution class 2. With a non insulated primary bar which fills the
through-hole
The result of the coercive field of the magnetic circuit
With a di/dt of 100 A/µs
A list of corresponding tests is available
980707/6
LEM Components
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