LV25-P_12 Datasheet, PDF (1/3 Pages) LEM – Voltage Transducer

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.
I_PN = 10 mA
V_PN = 10 .. 500 V
16084
Electrical data
Features
I_PN
Primary nominal current rms
I_PM
Primary current, measuring range
R_M
Measuring resistance
with ± 12 V
@ ± 10 mA _max

@ ± 14 mA _max
with ± 15 V
@ ± 10 mA _max

@ ± 14 mA _max
I_SN
Secondary nominal current rms
K_N
Conversion ratio
V_C
Supply voltage (± 5 %)
I_C
Current consumption
Accuracy - Dynamic performance data
10
mA
0 .. ± 14
mA
R R _{M min}
M max
30 190
Ω
30 100
Ω
100 350
Ω
100 190
Ω
25
mA
2500 : 1000
± 12 .. 15
V
10 (@ ± 15 V) + I_S mA
X_G
Overall accuracy @ I_PN, T_A = 25°C @ ± 12 .. 15 V ± 0.9
%

@ ± 15 V (± 5 %) ± 0.8
%
ε
L
Linearity error
< 0.2
%

Typ Max
I_O
Offset current @ I_P = 0, T_A = 25°C
± 0.15 mA
I_OT
Temperature variation of I_O
0°C .. + 25°C ± 0.06 ± 0.25 mA

+ 25°C .. + 70°C ± 0.10 ± 0.35 mA
t_r
Response time ¹⁾ to 90 % of I_PN step
40
µs
General data
T_A
Ambient operating temperature
T_S
Ambient storage temperature
R_P
Primary coil resistance
@ T_A = 70°C
R_S
Secondary coil resistance
@ T_A = 70°C
m
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.
20November2012/version 18 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice
Page 1/3
www.lem.com