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).
Electrical data
I
PN
Primary nominal r.m.s. current
20
mA
I
P
Primary current, measuring range
0 .. 40
mA
R
M
Measuring resistance
R
M min
R
M max
with 15 V
@ 20 mA
max
0
90
@ 40 mA
max
0
25
with 24 V
@ 20 mA
max
60
170
@ 40 mA
max
60
65
I
SN
Secondary nominal r.m.s. current
100
mA
I
S
Secondary current @ I
P max
200
mA
K
N
Conversion ratio
10000 : 2000
V
C
Supply voltage ( 10 %)
15 .. 24
V
I
C
Current consumption
30
(@ 24 V) +
I
S
mA
V
d
R.m.s. voltage for AC isolation test, 50 Hz, 1 mn
6
1)
kV
1
2)
kV
V
e
R.m.s. voltage for partial discharges extinction @ 10 pC 2.5
kV
Accuracy - Dynamic performance data
X
G
Overall Accuracy @ I
PN
, T
A
= 25C
0.5
%
L
Linearity
< 0.1
%
Typ
Max
I
O
Offset current @ I
P
= 0, T
A
= 25C
0.3
mA
I
OT
Thermal drift of I
O
- 25C .. + 70C
0.4 0.7
mA
t
r
Response time
3)
@ 90 % of V
P max
20 .. 100
s
General data
T
A
Ambient operating temperature
- 25 .. + 70
C
T
S
Ambient storage temperature
- 40 .. + 85
C
R
P
Primary coil resistance @ T
A
= 25C
420
R
S
Secondary coil resistance @ T
A
= 70C
40
m
Mass
1.6
kg
Standards
4)
EN 50178
Notes :
1)
Between primary and secondary + shield
2)
Between secondary and shield
3)
R
1
= 50 k
(L/R constant, produced by the resistance and inductance
of the primary circuit)
4)
A list of corresponding tests is available
Features
Closed loop (compensated) voltage
transducer using the Hall effect
Insulated plastic case recognized
according to UL 94-V0
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.
Advantages
Excellent accuracy
Very good linearity
Low thermal drift
High immunity to external
interference
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.
981103/7
I
PN
= 20
mA
V
PN
= 100 .. 2500
V
LEM Components
w w w .lem.com
Front view
Left view
Top view
Dimensions LV 200-AW/2
(in mm. 1 mm = 0.0394 inch)
Remarks
I
S
is positive when V
P
is applied on terminal +HT.
This is a standard model. For different versions (supply
voltages, turns ratios, unidirectional measurements...),
please contact us.
Mechanical characteristics
General tolerance
0.5 mm
Fastening
4 holes
6.5 mm
Connection of primary
M5 threaded studs
Connection of secondary
M5 threaded studs
Fastening torque
2.2 Nm or 1.62 Lb - Ft.
LEM reserves the right to carry out modifications on its transducers, in order to improve them, without previous notice.
Secondary terminals
Terminal + : supply voltage + 15 .. 24 V
Terminal M : measure
Terminal E : shield
Terminal - : supply voltage - 15 .. 24 V
Connection
or
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, I
P
= 20 mA
Accuracy = 0.5 % of V
PN
(@ T
A
=
+25C)
b) R
1
= 200 k
/10 W, I
P
= 5 mA
Accuracy = 2.0 % of V
PN
(@ T
A
=
+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.
PDF 
ZIP