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Current Transducer LT 505-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
=
500 A
Electrical data
IPN IP RM Primary nominal r.m.s. current Primary current, measuring range Measuring resistance @ with 15 V with 24 V ISN KN VC IC Vd Vb @ 500 @ 800 @ 500 @ 1200 A max A max A max A max 500 0 .. 1200 TA = 70C TA = 85C RM min RM max RM min RM max 0 0 0 0 65 15 145 22 0 0 15 15 60 12 140 18 A A
Features
*Closed loop (compensated) current
transducer using the Hall effect

*Insulated 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
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 R.m.s. rated voltage 1), safe separation basic isolation
100 mA 1 : 5000 15 .. 24 V 30 (@ 24 V) + IS mA 6 kV 1750 V 3500 V
Accuracy - Dynamic performance data
XG
*Current overload capability.
0.6 < 0.1 Typ Max 0.4 0.5 % % mA mA s A/s kHz
L
Overall accuracy @ IPN , TA = 25C Linearity Offset current @ IP = 0, TA = 25C Thermal drift of IO - 10C .. + 85C Response time 2) @ 90 % of IP max di/dt accurately followed Frequency bandwidth (- 1 dB)
Applications
*AC variable speed drives and servo
motor drives
IO IOT tr di/dt f
0.3
<1 > 50 DC .. 150
*Static converters for DC motor drives *Battery supplied applications *Uninterruptible Power Supplies
(UPS)
*Switched Mode Power Supplies
General data
TA TS RS m Ambient operating temperature Ambient storage temperature Secondary coil resistance @ Mass Standards 3) - 10 .. + 85 - 25 .. + 100 65 69 400 EN 50178 C C g
(SMPS)
*Power supplies for welding
applications.
TA = 70C TA = 85C
Notes :
1)
2) 3)
Pollution class 2. With a non insulated primary bar which fills the through-hole With a di/dt of 100 A/s A list of corresponding tests is available
980708/6
LEM Components
w w w .lem.com
Dimensions LT 505-S
Front view
(in mm. 1 mm = 0.0394 inch)
Left view
Secondary terminals
Terminal + : supply voltage + 15 .. 24 V Terminal M : measure Terminal - : supply voltage - 15 .. 24 V
Connection
Top view Mechanical characteristics
*General tolerance *Fastening *Primary through-hole *Connection of secondary
0.5 mm 4 holes 6.5 mm 40.5 x 40.5 mm Faston 6.3 x 0.8 mm
Remarks
*IS is positive when IP flows in the direction of the arrow. *Temperature of the primary conductor should not exceed
100C.
*Dynamic performances (di/dt and response time) are best
with a single bar completely filling the primary hole.
*This is a standard model. For different versions (supply
voltages, turns ratios, unidirectional measurements...), please contact us.
LEM reserves the right to carry out modifications on its transducers, in order to improve them, without previous notice.

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