LV20-P Datasheet, PDF (1/2 Pages) LEM – Voltage Transducer

Voltage Transducer LV 20-P
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).
I_PN = 10 mA
V_PN = 10 .. 500 V
Electrical data
I _PN Primary nominal r.m.s. current
I_P
Primary current, measuring range
R_M Measuring resistance
with ± 12 V
with ± 15 V
@ ± 10 mA _max
@ ± 14 mA _max
@ ± 10 mA _max
@ ± 14 mA _max
I_SN Secondary nominal r.m.s. current
K_N Conversion ratio
V_C Supply voltage (± 5 %)
I_C
Current consumption
V_d
R.m.s. voltage for AC isolation test ¹⁾, 50 Hz, 1 mn
Accuracy - Dynamic performance data
X _G Overall Accuracy @ I_PN , T_A = 25°C @ ± 12 .. 15 V
@ ± 15 V (± 5 %)
ε_L
Linearity
I_O
Offset current @ I_P = 0, T_A = 25°C
I_OT
Thermal drift of I_O
0°C .. + 25°C
+ 25°C .. + 70°C
t_r
Response time ²⁾ @ 90 % of V_{P max}
General data
10
mA
0 .. ± 14
mA
R_{M min}
R_{M max}
30 190 Ω
30 100 Ω
100 350 Ω
100 190 Ω
25
mA
2500 : 1000
± 12 .. 15
V
10 (@±15V ) +I_S m A
2.5
kV
± 1.1
%
± 1.0
%
< 0.2
%
Typ Max
± 0.20 m A
± 0.10 ± 0.30 m A
± 0.14 ± 0.40 m A
40
µs
Features
• Closed loop (compensated) voltage
transducer using the Hall effect
• Insulated plastic case recognized
according to UL 94-V0
• Optimized.
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
• Low response time
• High bandwidth
• High immunity to external
interference
• Low disturbance in common mode.
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
Standards ³⁾
0 .. + 70
°C
- 25 .. + 85
°C
250
Ω
110
Ω
22
g
EN 50178
Notes : ¹⁾ Between primary and secondary
2) _{R 1 = 25 kΩ (L/R constant, produced by the resistance and inductance}
of the primary circuit)
3) _{A list of corresponding tests is available}
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 .
010802/0
LEM Components
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