Voltage Transducer LV 25-P
For the electronic measurement of currents: DC, AC, pulsed...,
with galvanic isolation between the primary circuit and the secondary
circuit.
IPN = 10 mA
VPN = 10 .. 500 V
16084
Features
Electrical data
IPN
Primary nominal current rms
IPM
Primary current, measuring range
RM
Measuring resistance
with ± 12 V
@ ± 10 mA max
@ ± 14 mA max
with ± 15 V
@ ± 10 mA max
@ ± 14 mA max
ISN
Secondary nominal current rms
K N
Conversion ratio
VC
Supply voltage (± 5 %)
IC
Current consumption
10
0 .. ± 14
RM min
mA
mA
RM max
30 190
Ω
30 100
Ω
100 350
Ω
100 190
Ω
25
mA
2500 : 1000
± 12 .. 15
V
10 (@ ± 15 V) + IS mA
Accuracy - Dynamic performance data
XG
εL
IO
IOT
t r
Overall accuracy @ IPN, TA = 25°C @ ± 12 .. 15 V
± 0.9
@ ± 15 V (± 5 %) ± 0.8
Linearity error
< 0.2
Typ Max
Offset current @ IP = 0, TA = 25°C
± 0.15
Temperature variation of IO
0°C .. + 25°C ± 0.06 ± 0.25
+ 25°C .. + 70°C ± 0.10 ± 0.35
Response time 1) to 90 % of IPN step
40
%
%
%
mA
mA
mA
µs
General data
TA
TS
RP
RS
m
Ambient operating temperature
Ambient storage temperature
Primary coil resistance
@ TA = 70°C
Secondary coil resistance
@ TA = 70°C
Mass
Standard
0 .. + 70
°C
- 25 .. + 85
°C
250
Ω
110
Ω
22
g
EN 50178: 1997
Note: 1) R1 = 25 kΩ (L/R constant, produced by the resistance and inductance of
the primary circuit).
●● Closed loop (compensated)
current transducer using the Hall
effect
●● Isolated plastic case recognized
according to UL 94-V0.
Principle of use
●● For voltage measurements,
a current proportional to the
measured voltage must be
passed through an external
resistor R1 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
Low response time
High bandwidth
High immunity to external
interference
●● Low disturbance in common
mode.
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.
Application domain
●● Industrial.
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20November2012/version 18
LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice
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