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 Voltage Transducer LV 25-400
For the electronic measurement of voltages : DC, AC, pulsed..., with a galvanic isolation between the primary circuit (high voltage) and the secondary circuit (electronic circuit).
VPN =
400 V
Electrical data
VPN VP IPN RM Primary nominal r.m.s. voltage Primary voltage, measuring range Primary nominal r.m.s. current Measuring resistance with 12 V with 15 V ISN KN VC IC Vd @ 400 V max @ 600 V max @ 400 V max @ 600 V max 400 V 0 .. 600 V 10 mA RM min RM max 30 30 100 100 200 100 320 180
Features
*Closed loop (compensated) voltage
transducer using the Hall effect
*Transducer with insulated plastic
case recognized according to UL 94-V0 *Primary resistor R 1 and transducer mounted on printed circuit board 128 x 60 mm.
Secondary nominal r.m.s. current Conversion ratio Supply voltage ( 5 %) Current consumption R.m.s. voltage for AC isolation test 1), 50 Hz, 1 mn
25 mA 400 V / 25 mA 12 .. 15 V 10 (@ 15 V) + IS mA 4.1 kV
Advantages
*Excellent accuracy *Very good linearity *Low thermal drift *High immunity to external
interference.
Accuracy - Dynamic performance data
XG
L
Overall Accuracy @ VPN , TA = 25C Linearity Offset current @ IP = 0, TA = 25C Thermal drift of IO Response time @ 90 % of VP max
0.8 < 0.2 Max 0.15 0.10 0.60 0.10 0.60 15 Typ
% % mA mA mA s
Applications
*AC variable speed drives and servo
motor drives
IO IOT tr
- 25C .. + 25C + 25C .. + 70C
*Static converters for DC motor drives *Uninterruptible Power Supplies
(UPS)
General data
TA TS N P R1 RS m Ambient operating temperature Ambient storage temperature Turns ratio Total primary power loss Primary resistance @ TA = 25C Secondary coil resistance @ TA = 70C Mass Standards 2)
1) 2)
*Power supplies for welding
applications. - 25 .. + 70 - 40 .. + 85 2500 : 1000 4 40 110 60 EN 50178 C C W k g
Notes :
Between primary and secondary A list of corresponding tests is available 980909/2
LEM Components
w w w .lem.com
Dimensions LV 25-400
Front view
(in mm. 1 mm = 0.0394 inch)
Top view
Standard 00 or N SP.. Year Week
Secondary terminals
Terminal + : supply voltage + 12 .. 15 V Terminal M : measure Terminal - : supply voltage - 12 .. 15 V
Connection
Mechanical characteristics
*General tolerance *Fastening *Connection of primary *Connection of secondary
0.3 mm 4 holes 4.2 mm Faston 6.3 x 0.8 mm Faston 6.3 x 0.8 mm
Remarks
*IS is positive when VP is applied on terminal +HT. *The primary circuit of the transducer must be linked to the
connections where the voltage has to be measured.
*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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