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Voltage Transducer LV 200-AW/2
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).
IPN = 20 mA VPN = 100 .. 2500 V
Electrical data
I PN IP RM Primary nominal r.m.s. current Primary current, measuring range Measuring resistance with 15 V with 24 V ISN IS KN VC IC Vd Ve @ 20 mA max @ 40 mA max @ 20 mA max @ 40 mA max 20 mA 0 .. 40 mA RM min RM max 0 0 60 60 90 25 170 65
Features
* Closed loop (compensated) voltage
transducer using the Hall effect
* Insulated plastic case recognized
according to UL 94-V0
100 mA 200 mA 10000 : 2000 15 .. 24 V 30 (@ 24 V )+ IS m A 6 1) kV 1 2) kV R.m.s. voltage for partial discharges extinction @ 10 pC 2.5 kV
Secondary nominal r.m.s. current Secondary current @ IP max Conversion ratio Supply voltage ( 10 %) Current consumption R.m.s. voltage for AC isolation test, 50 Hz, 1 mn
* Accessible electronic circuit * Shield between primary and
secondary circuit.
Principle of use
* For voltage measurements, a current
proportional to the measured voltage must be passed through an external resistor R 1 which is selected by the user and installed in series with the primary circuit of the transducer.
Accuracy - Dynamic performance data
XG
L
Overall Accuracy @ IPN , TA = 25C Linearity error Offset current @ IP = 0, TA = 25C Thermal drift of IO Response time 3) @ 90 % of VPN
0.5 < 0.1 Typ Max 0.3 0.7
% % mA mA s
Advantages
* * * *
Excellent accuracy Very good linearity Low thermal drift High immunity to external interference
IO IOT tr
- 25C .. + 70C
0.4
20 .. 100
General data
TA TS RP RS m Ambient operating temperature Ambient storage temperature Primary coil resistance @ TA = 25C Secondary coil resistance @ TA = 70C Mass Standards - 25 .. + 70 C - 40 .. + 85 C 420 40 1.6 kg EN 50178 (01.10.97)
Applications
* AC variable speed drives and servo
motor drives
* Static converters for DC motor drives * Battery supplied applications * Uninterruptible Power Supplies
(UPS)
* Power supplies for welding
applications .
Notes :
1) 2) 3)
Between primary and secondary + shield Between secondary and shield R 1 = 50 k (L/R constant, produced by the resistance and inductance of the primary circuit) 030916/8
LEM Components
w w w.lem.com
Dimensions LV 200-AW/2 (in mm. 1 mm = 0.0394 inch)
Left view Front view
Connection
Top view Mechanical characteristics
* General tolerance * Fastening of the transducer
Recommended fastening torque * Connection of primary * Connection of secondary * Recommended fastening torque 0.5 mm 4 slots 6.5 mm 4 steel screws M6 4.5 Nm or 3.32 Lb. - Ft. M5 threaded studs M5 threaded studs 2.2 Nm or 1.62 Lb - Ft.
Remarks
* IS is positive when VP is applied on terminal +HT. * This is a standard model. For different versions (supply
voltages, turns ratios, unidirectional measurements...), please contact us.
Instructions for use of the voltage transducer model LV 200-AW/2 Primary resistor R 1 : the transducer's optimum accuracy is obtained at the nominal primary current. As far as possible, R 1 should be calculated so that the nominal voltage to be measured corresponds to a primary current of 20 mA . Example: Voltage to be measured V PN = 1000 V a) R 1 = 50 k/40 W, IP = 20 mA b) R 1 = 200 k/10 W, IP = 5 mA Accuracy = 0.5 % of V PN (@ TA = +25C) Accuracy = 2.0 % of V PN (@ TA = +25C)
Operating range (recommended) : taking into account the resistance of the primary windings (which must remain low compared to R 1, in order to keep thermal deviation as low as possible) and the isolation, this transducer is suitable for measuring nominal voltages from 100 to 2500 V.
LEM reserves the right to carry out modifications on its transducers, in order to improve them, without previous notice.

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