LV25-P [LEM]
VOLTAGE TRANSDUCER LV 25-P; 电压传感器LV 25 -P
| 型号： | LV25-P |
| 厂家： | 
LEM |
| 描述： | VOLTAGE TRANSDUCER LV 25-P |
| 文件： | 总2页 (文件大小：54K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Voltage Transducer LV 25-P
IPN = 10 mA
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).
VPN = 10 .. 500 V
Electrical data
I PN
IP
RM
Primary nominal r.m.s. current
Primary current, measuring range
Measuring resistance
10
0 .. ± 14
RM min
mA
mA
Features
RM max
· Closed loop (compensated) voltage
transducer using the Hall effect
· Insulated plastic case recognized
according to UL 94-V0.
with ± 12 V
@ ± 10 mA max
30
30
100
100
190
100
350
190
W
W
W
W
@ ± 14 mA max
@ ± 10 mA max
@ ± 14 mA max
with ± 15 V
Principle of use
ISN
KN
VC
IC
Secondary nominal r.m.s. current
Conversion ratio
Supply voltage (± 5 %)
Current consumption
R.m.s. voltage for AC isolation test 1), 50 Hz, 1 mn
25
mA
2500 : 1000
± 12 .. 15
10 (@± 15 V)+ IS mA
· 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.
V
Vd
2.5
kV
Accuracy - Dynamic performance data
XG
Overall Accuracy @ IPN , TA = 25°C @ ± 12 .. 15 V
± 0.9
± 0.8
< 0.2
%
%
%
Advantages
@ ± 15 V (± 5 %)
e
Linearity
· Excellent accuracy
· Very good linearity
· Low thermal drift
· Low response time
· High bandwidth
L
Typ
Max
± 0.15 mA
IO
IOT
Offset current @ IP = 0, TA = 25°C
Thermal drift of IO
0°C .. + 25°C
± 0.06 ± 0.25 mA
± 0.10 ± 0.35 mA
+ 25°C .. + 70°C
· High immunity to external
interference
tr
Response time 2) @ 90 % of VP max
40
µs
· Low disturbance in common mode.
General data
Applications
TA
TS
RP
RS
m
Ambient operating temperature
Ambient storage temperature
0 .. + 70
- 25 .. + 85
250
110
22
°C
°C
W
W
g
· AC variable speed drives and servo
motor drives
· Static converters for DC motor drives
· Battery supplied applications
· Uninterruptible Power Supplies
(UPS)
Primary coil resistance @ TA = 70°C
Secondary coil resistance @ TA = 70°C
Mass
3)
Standards
EN 50178
· Power supplies for welding
applications.
1)
Notes : Between primary and secondary
2)
R 1 = 25 kW (L/R constant, produced by the resistance and inductance
of the primary circuit)
A list of corresponding tests is available
3)
981125/14
LEM Components
Tope Co., Ltd. Tel: (02) 8228-0658
www.lem.com
Fax: (02) 8228-0659
http://www.sensor.com.tw
e-mail: tope@ms1.hinet.net
Dimensions LV 25-P (in mm. 1 mm = 0.0394 inch)
Bottom view
Right view
Top view
swiss
made
Standard 00
or N° SP..
Year Week
Secondary terminals
Terminal + : supply voltage + 12 .. 15 V
Terminal M : measure
Terminal
- : supply voltage - 12 .. 15 V
Connection
Back view
Mechanical characteristics
Remarks
· General tolerance
· Fastening & connection of primary
± 0.2 mm
2 pins
0.635 x 0.635 mm
· IS is positive when VP is applied on terminal +HT.
· This is a standard model. For different versions (supply
voltages, turns ratios, unidirectional measurements...),
please contact us.
· Fastening & connection of secondary 3 pins Æ 1 mm
· Recommended PCB hole 1.2 mm
Instructions for use of the voltage transducer model LV 25-P
Primary resistor R 1 : the transducer’s optimum accuracy is obtained at the nominal primary current. As far as possible, R 1 should be
calculated so that the nominal voltage to be measured corresponds to a primary current of 10 mA.
Example: Voltage to be measured VPN = 250 V
a) R1 = 25 kW/2.5 W, IP = 10 mA
b) R1 = 50 kW/1.25 W, IP = 5 mA
Accuracy = ± 0.8 % of VPN (@ TA = + 25°C)
Accuracy = ± 1.6 % of VPN (@ TA = + 25°C)
Operating range (recommended) : taking into account the resistance of the primary windings (which must remain low compared to R 1, in order
to keep thermal deviation as low as possible) and the isolation, this transducer is suitable for measuring nominal voltages from 10 to 500 V.
LEM reserves the right to carry out modifications on its transducers, in order to improve them, without previous notice.
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