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LF305-S

LEM
Part Number LF305-S
Manufacturer LEM
Description Current Transducer LF 305-S
Published Mar 22, 2005
Detailed Description Current Transducer LF 305-S For the electronic measurement of currents : DC, AC, pulsed..., with a galvanic isolation be...
Datasheet PDF File LF305-S PDF File

LF305-S
LF305-S

Overview
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 Preliminary Electrical data IPN IP RM Primary nominal r.
m.
s.
current Primary current, measuring range Measuring resistance with ± 12 V with ± 15 V with ± 20 V ISN KN VC IC Vd @ ± 300 A max @ ± 500 A max @ ± 300 A max @ ± 500 A max @ ± 300 A max @ ± 500 A max 300 0 .
.
± 500 RM min RM max 0 0 0 0 15 15 39 12 58 22 93 45 A A Ω Ω Ω Ω Ω Ω Features • Closed loop (compensated) current • Insulated plastic case recognized according to UL 94-V0.
transducer using the Hall effect 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.
Secondary nominal r.
m.
s.
current Conversion ratio Supply voltage (± 5 %) Current consumption R.
m.
s.
voltage for AC isolation test, 50 Hz, 1 mn 150 mA 1 : 2000 ± 12 .
.
20 V 16 (@ ± 20 V) + IS mA 3 kV Accuracy - Dynamic performance data XG ε L Overall accuracy @ IPN , TA = 25°C Linearity Offset current @ IP = 0, TA = 25°C Residual current 1) @ IP = 0, after an overload of 3 x IPN Thermal drift of IO - 10°C .
.
+ 70°C Reaction time @ 10 % of IPN Response time 2) @ 90 % of IPN di/dt accurately followed Frequency bandwidth (- 1 dB) ± 0.
4 < 0.
1 Max ± 0.
20 ± 0.
08 ± 0.
1 ± 0.
30 < 500 <1 > 100 DC .
.
100 Typ % % mA mA mA ns µs A/µs kHz Applications • AC variable speed drives and servo • Static converters for DC motor drives • Battery supplied applications • Uninterruptible Power Supplies • Switched Mode Power Supplies • Power supplies for welding (SMPS) applications.
(UPS) motor drives IO IOM IOT tra tr di/dt f General data TA TS RS m Ambient operating temperature Ambient storage temperature Secondary coil resistance @ TA = 70°C Mass Standards 3) - 10 .
.
+ 70 - ...


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