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LA305-S Datasheet(PDF) 1 Page - LEM

No. de pieza LA305-S
Descripción Electrónicos  Current Transducer
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Fabricante Electrónico  LEM [LEM]
Página de inicio  http://www.lem.co.jp/HQ/en
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LA305-S Datasheet(HTML) 1 Page - LEM

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LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice.
110203/9
www.lem.com
Page 1/3
Current Transducer LA 305-S
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
300
A
I
PM
Primary current, measuring range
0 .. ± 500
A
T
A = 70°C
T
A = 85°C
R
M
Measuring resistance
R
M min RM max RM min RM max
with ± 12 V
@ ± 300 A
max
0
52
0
50 Ω
@ ± 500 A
max
0
17
0
15 Ω
with ± 15 V
@ ± 300 A
max
0
75
5
73 Ω
@ ± 500 A
max
0
31
5
29 Ω
I
SN
Secondary nominal current rms
120
mA
K
N
Conversion ratio
1 : 2500
V
C
Supply voltage (± 5 %)
± 12 .. 15
V
I
C
Current consumption
20 (@ ± 15 V) +
I
S mA
X
G
Overall accuracy @
I
PN, TA = 25°C
± 0.8
%
Accuracy - Dynamic performance data
ε
L
Linearity error
< 0.1
%
Typ
Max
I
O
Offset current @
I
P = 0, TA = 25°C
± 0.20
mA
I
OM
Magnetic offset current 1) @
I
P = 0 and specified RM,
mA
after an overload of 3 x
I
PN
± 0.40
mA
I
OT
Temperature variation of
I
O
- 10°C .. + 85°C
± 0.12 ± 0.30
mA
t
ra
Reaction time @ 10 % of
I
PN
< 500
ns
t
r
Response time 2) @ 90 % of
I
PN step
< 1
µs
di/dt
di/dt accurately followed
> 100
A/µs
BW
Frequency bandwidth (- 3 dB)
DC .. 100
kHz
T
A
Ambient operating temperature
- 10 .. + 85
°C
General data
T
S
Ambient storage temperature
- 40 .. + 90
°C
R
S
Secondary coil resistance
@
T
A = 70°C
35
@
T
A = 85°C
37
m
Mass
200
g
Standards
EN 50178: 1997
Notes: 1) The result of the coercive force (Hc) of the magnetic circuit
2)
With a di/dt of 100 A/µs.
I
PN = 300 A
Features
● Closed loop (compensated)
current transducer using the Hall
effect
● 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.
16173


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