Current Transducer LF 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).
16167
Electricaldata
IPN
IPM
RM
Primary nominal current rms
Primary current, measuring range
Measuring resistance
300
0 .. ± 500
RM mini
A
A
Features
RM maxi
· Closed loop (compensated) current
transducer using the Hall effect
· Isolated plastic case recognized
according to UL 94-V0.
with ± 12 V
with ± 15 V
with ± 20 V
@ ± 300 A max
0
0
0
0
15
15
39
12
58
22
93
45
W
W
W
W
W
W
@ ± 500 A max
@ ± 300 A max
@ ± 500 A max
@ ± 300 A max
@ ± 500 A max
Advantages
· Excellent accuracy
· Very good linearity
ISN
KN
VC
IC
Secondary nominal current rms
Conversion ratio
Supply voltage (± 5 %)
Current consumption
150
1 : 2000
± 12 .. 20
26 (@±20V)+IS mA
mA
· Low temperature drift
· Optimized response time
· Wide frequency bandwidth
· No insertion losses
· High immunity to external
interference
V
Accuracy - Dynamic performance data
X
Overall accuracy @ IPN , TA = 25°C
Linearity error
± 0.4
< 0.1
%
%
eG
· Current overload capability.
L
Typ Maxi
Applications
IO
Offset current @ IP = 0, TA = 25°C
± 0.20 mA
IOM
Magnetic offset current1) @ IP = 0 and specified RM,
after an overload of 3 x IPN
· AC variable speed drives and servo
motor drives
· Static converters for DC motor drives
· Battery supplied applications
· Uninterruptible Power Supplies
(UPS)
± 0.08 mA
± 0.1 ± 0.30 mA
IOT
tra
Temperature variation of IO
- 10°C .. + 70°C
Reaction time @ 10 % of IPN
Response time 2) to 90 % of IPN step
< 500
< 1
ns
µs
t
r
di/dt di/dt accurately followed
BW Frequency bandwidth (- 1 dB)
> 100
DC .. 100
A/µs
kHz
· Switched Mode Power Supplies
(SMPS)
· Power supplies for welding
applications.
General data
TA
TS
RS
m
Ambient operating temperature
Ambient storage temperature
Secondary coil resistance @ TA = 70°C
- 10 .. + 70
- 25 .. + 85
25
°C
°C
W
g
Applicationdomain
Mass
95
· Industrial.
Standards
EN 50178: 1997
1)
Notes:
The result of the coercive field of the magnetic circuit
With a di/dt of 100 A/µs.
2)
page1/3
LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice.
www.lem.com
061031/7