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