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LV25-P Datasheet, PDF (1/2 Pages) LEM – VOLTAGE TRANSDUCER LV 25-P | |||
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Voltage Transducer LV 25-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).
IPN = 10 mA
V = 10 .. 500 V
PN
Electrical data
I
Primary nominal r.m.s. current
PN
IP
Primary current, measuring range
R
Measuring resistance
M
with ± 12 V
with ± 15 V
@ ± 10 mA
max
@ ± 14 mA max
@ ± 10 mA
max
@ ± 14 mA max
ISN
Secondary nominal r.m.s. current
K N Conversion ratio
VC Supply voltage (± 5 %)
IC
Current consumption
V
R.m.s. voltage for AC isolation test 1), 50 Hz, 1 mn
d
Accuracy - Dynamic performance data
10
mA
0 .. ± 14
mA
R
M min
R
M max
30
190 â¦
30
100 â¦
100 350 â¦
100 190 â¦
25
mA
2500 : 1000
± 12 .. 15
V
10 (@ ±15 V)+ IS mA
2.5
kV
Features
â¢Closed loop (compensated) voltage
transducer using the Hall effect
â¢Insulated plastic case recognized
according to UL 94-V0.
Principle of use
â¢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.
X G Overall Accuracy @ IPN , TA = 25°C @ ± 12 .. 15 V
@ ± 15 V (± 5 %)
εL
Linearity
IO
Offset current @ IP = 0, TA = 25°C
I
Thermal drift of I
OT
O
0°C .. + 25°C
+ 25°C .. + 70°C
t
Response time 2) @ 90 % of V
r
P max
General data
TA
Ambient operating temperature
T
Ambient storage temperature
S
R P Primary coil resistance @ TA = 70°C
R
Secondary coil resistance @ T = 70°C
S
A
m
Mass
Standards 3)
± 0.9
%
± 0.8
%
< 0.2
%
Typ Max
± 0.15 mA
± 0.06 ± 0.25 mA
± 0.10 ± 0.35 mA
40
µs
0 .. + 70
°C
- 25 .. + 85
°C
250
â¦
110
â¦
22
g
EN 50178
Advantages
â¢Excellent accuracy
â¢Very good linearity
â¢Low thermal drift
â¢Low response time
â¢High bandwidth
â¢High immunity to external
interference
â¢Low disturbance in common mode.
Applications
â¢AC variable speed drives and servo
motor drives
â¢Static converters for DC motor drives
â¢Battery supplied applications
â¢Uninterruptible Power Supplies
(UPS)
â¢Power supplies for welding
applications.
Notes : 1) Between primary and secondary
2)
R
1
=
25
kâ¦
(L/R
constant,
produced
by
the
resistance
and
inductance
of the primary circuit)
3) A list of corresponding tests is available
981125/14
LEM Components
w w w .lem.com
Tope Co., Ltd. Tel: (02) 8228-0658 Fax: (02) 8228-0659 http://www.sensor.com.tw e-mail: tope@ms1.hinet.net
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