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LA305-S Datasheet, PDF (1/2 Pages) LEM – Current Transducer LA 305-S | |||
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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).
IPN = 300 A
Electrical data
IPN
Primary nominal r.m.s. current
I
Primary current, measuring range
P
RM Measuring resistance @
with ± 12 V
with ± 15 V
@ ± 300 A
max
@ ± 500 A max
@ ± 300 A
max
@ ± 500 A max
ISN
Secondary nominal r.m.s. current
K N Conversion ratio
VC Supply voltage (± 5 %)
IC
Current consumption
Vb
R.m.s. rated voltage 1), safe separation
basic isolation
300
A
0 .. ± 500
A
TA = 70°C TA = 85°C
RR RR
M min M max M min M max
0 52 0 50 â¦
0 17 0 15 â¦
0 75 5 73 â¦
0 31 5 29 â¦
120
mA
1 : 2500
± 12 .. 15
V
20 (@ ±15 V) + IS mA
1750
V
3500
V
Accuracy - Dynamic performance data
εX G
L
I
O
IOM
I
OT
tra
tr
di/dt
f
Overall accuracy @ IPN , TA = 25°C
Linearity
± 0.8
%
< 0.1
%
Typ Max
Offset current @ I = 0, T = 25°C
P
A
± 0.20 mA
Residual current 2) @ IP = 0, after an overload of 3 x IPN
± 0.40 mA
Thermal drift of I
O
- 10°C .. + 85°C ± 0.12 ± 0.30 mA
Reaction time @ 10 % of IP max
Response time 3) @ 90 % of IP max
di/dt accurately followed
< 500
<1
> 100
ns
µs
A/µ s
Frequency bandwidth (- 3 dB)
DC .. 100
kHz
General data
T
Ambient operating temperature
A
TS
Ambient storage temperature
R S Secondary coil resistance @
m
Mass
Standards 4)
- 10 .. + 85
°C
- 40 .. + 90
°C
TA = 70°C 35
â¦
TA = 85°C 37
â¦
200
g
EN 50178
Features
â¢Closed loop (compensated) current
transducer using the Hall effect
â¢Insulated plastic case recognized
according to UL 94-V0
â¢Copyright protected.
Advantages
â¢Excellent accuracy
â¢Very good linearity
â¢Low temperature drift
â¢Optimized response time
â¢Wide frequency bandwidth
â¢No insertion losses
â¢High immunity to external
interference
â¢Current overload capability.
Applications
â¢AC variable speed drives and servo
motor drives
â¢Static converters for DC motor drives
â¢Battery supplied applications
â¢Uninterruptible Power Supplies
(UPS)
â¢Switched Mode Power Supplies
(SMPS)
â¢Power supplies for welding
applications.
Notes : 1) Pollution class 2. With a non insulated primary bar which fills the
through-hole
2) The result of the coercive field of the magnetic circuit
3) With a di/dt of 100 A/µs
4) A list of corresponding tests is available
980707/6
LEM Components
w w w .lem.com
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