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Voltage Transducer LV 100-400
For the electronic measurement of voltages: DC, AC, pulsed...,
with galvanic isolation between the primary circuit (high voltage)
and the secondary circuit (electronic circuit).
Electrical data
VPN
VPM
IPN
R M
Features
Primary nominal voltage rms
Primary voltage, measuring range
Primary nominal current rms
Measuring resistance
with ± 15 V
@ ± 400 V max
@ ± 600 V max
with ± 24 V
@ ± 400 V max
@ ± 600 V max
ISN
Secondary nominal current rms
K N
Conversion ratio
VC
Supply voltage (± 5 %)
IC
Current consumption
400
0 .. ± 600
25
RM min RM max
V
V
mA
0
210
Ω
0
120
Ω
0410 Ω
0
250
Ω
50
mA
400 V / 50 mA
± 15 .. 24 V
< 37(@ ± 24 V) + IS mA
Accuracy - Dynamic performance data
XG
εL
Overall accuracy @ VPN, TA = 25°C
Linearity error
IO
IOT
Typ Max
Offset current @ IP = 0, TA = 25°C
± 0.2
Temperature variation of IO 0°C .. + 70°C ± 0.2 ± 0.3 tr
Response
time to 90
% of VPN step
1)
Resp
m
o9
io
n
%
0
Isteoefsp
t
100.5.0
µs
t
r
PN
± 0.9
< 0.1
80
%
%
mA
mA
µs
General data
TA
TS
NP
P
R 1
RS
m
VPN= 400 V
Ambient operating temperature 0 .. + 70
Ambient storage temperature
- 25 .. + 85
Turns ratio
4000 : 2000
Total primary power loss
10
Primary resistance @ TA = 25°C
16
Secondary coil resistance @ TA = 70°C
55
Mass
790
Standards EN 50178: 1997
°C
°C
W
kΩ
Ω
g
●● Closed loop (compensated)
voltage transducer using Hall
effect
●● Isolated plastic case recognized
according to UL 94-V0
●● Primary resistor R1 incorporated
within the housing.
Advantages
●●
●●
●●
●●
●●
●●
●●
Excellent accuracy
Very good linearity
Low temperature drift
Optimized response time
Wide frequency bandwidth
No insertion losses
High immunity to external
interference.
Applications
●● AC variable speed drives and
servo motor drives
●● Static converters for DC motor
drives
●● Uninterruptible Power Supplies
(UPS)
●● Power supplies for welding
applications.
Application Domain
●● Industrial.
Page 1/3
110407/6
LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice.
www.lem.com
Voltage Transducer LV 100-400
Isolation characteristics
Vd
Vw
Rms voltage for AC isolation test, 50 Hz, 1 min
Impulse withstand voltage 1.2/50 µs
6
6.7 kV
kV
dCp
dCI
CTI
Creepage distance
Clearance distance
Comparative Tracking Index (group I)
Min
55.12
27.9
600
mm
mm
Applications examples
According to EN 50178 and IEC 61010-1 standards and following conditions:
●● Over voltage category OV 3
●● Pollution degree PD2
●● Non-uniform field
EN 50178
IEC 61010-1
Rated insulation voltage
Nominal voltage
Single insulation
400 V
400 V
Reinforced insulation
400 V
400 V
dCp, dCI, Vw
Safety
This transducer must be used in electric/electronic equipment with respect
to applicable standards and safety requirements in accordance with the
manufacturer’s operating instructions.
Caution, risk of electrical shock
When operating the transducer, certain parts of the module can carry hazardous
voltage (eg. primary busbar, power supply).
Ignoring this warning can lead to injury and/or cause serious damage.
This transducer is a build-in device, whose conducting parts must be inaccessible
after installation.
A protective housing or additional shield could be used.
Main supply must be able to be disconnected.
Page 2/3
110407/6
LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice.
www.lem.com
Dimensions LV 100-400 (in mm)
Connection
Mechanical characteristics
●● General tolerance
●● Transducer fastening
Recommended fastening torque
●● Connection of primary
●● Connection of secondary
●● Connection to the ground
Recommended fastening torque
Remarks
± 0.3 mm
2 holes Ø 6.5 mm,
2 x M6 steel screws
5 Nm
M5 threaded studs
Faston 6.3 x 0.8 mm
M5 threaded stud
2.2 Nm
●● 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.
Page 3/3
110407/6
LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice.
www.lem.com
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