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LF305-S_06 Datasheet, PDF (1/3 Pages) LEM – Current Transducer | |||
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Current Transducer LF 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 current rms
IPM Primary current, measuring range
RM Measuring resistance
with ± 12 V
with ± 15 V
with ± 20 V
@ ± 300 A max
@ ± 500 A max
@ ± 300 A max
@ ± 500 A max
@ ± 300 A max
@ ± 500 A max
ISN Secondary nominal current rms
K N Conversion ratio
VC Supply voltage (± 5 %)
IC
Current consumption
16167
Accuracy - Dynamic performance data
εX G
L
Overall accuracy @ IPN , TA = 25°C
Linearity error
IO
IOM
IOT
tra
tr
di/dt
BW
Offset current @ IP = 0, TA = 25°C
Magnetic offset current 1) @ IP = 0 and specified RM,
after an overload of 3 x IPN
Temperature variation of IO
- 10°C .. + 70°C
Reaction time @ 10 % of IPN
Response time 2) to 90 % of IPN step
di/dt accurately followed
Frequency bandwidth (- 1 dB)
General data
TA
Ambient operating temperature
TS Ambient storage temperature
R S Secondary coil resistance @ TA = 70°C
m Mass
Standards
300
A
0 .. ± 500
A
RM mini
RM maxi
0
39 â¦
0
12 â¦
0
58 â¦
0
22 â¦
15
93 â¦
15
45 â¦
150
mA
1 : 2000
± 12 .. 20
V
26 (@±20V) + IS mA
± 0.4
%
< 0.1
%
Typ Maxi
± 0.20 mA
± 0.08 mA
± 0.1 ± 0.30 mA
< 500
<1
> 100
DC .. 100
ns
µs
A/µs
kHz
- 10 .. + 70
°C
- 25 .. + 85
°C
25
â¦
95
g
EN 50178: 1997
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.
Notes: 1) The result of the coercive field of the magnetic circuit
2) With a di/dt of 100 A/µs.
061031/7
LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice.
page 1/3
www.lem.com
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