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參數(shù)資料
| 型號： | LV25P |
| 廠商： | LEM |
| 英文描述： | VOLTAGE TRANSDUCER |
| 中文描述： | 電壓互感器 |
| 文件頁數(shù)： | 2/2頁 |
| 文件大?。?/td> | 69K |
| 代理商： | LV25P |
Bottom view
Right view
Top view
Dimensions LV 25-P
(in mm. 1 mm = 0.0394 inch)
Remarks
I
is positive when
V
is applied on terminal +HT.
This is a standard model. For different versions (supply
voltages, turns ratios, unidirectional measurements...),
please contact us.
Mechanical characteristics
General tolerance
Fastening & connection of primary
± 0.2 mm
2 pins
0.635 x 0.635 mm
Fastening & connection of secondary 3 pins
1 mm
Recommended PCB hole
1.2 mm
Secondary terminals
Terminal + : supply voltage + 12 .. 15 V
Terminal M : measure
Terminal -
: supply voltage - 12 .. 15 V
Connection
LEM reserves the right to carry out modifications on its transducers, in order to improve them, without previous notice.
Instructions for use of the voltage transducer model LV 25-P
Primary resistor
R
: 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.
a)
R
1
= 25 k
/
2.5 W,
I
P
= 10 mA
b)
R
1
= 50 k
/
1.25 W,
I
P
= 5 mA
Operating range (recommended) : taking into account the resistance of the primary windings (which must remain low compared to
R
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.
Example: Voltage to be measured
V
PN
= 250 V
Accuracy = ± 0.8 % of
V
PN
(@
T
A
= +
25°C)
Accuracy = ± 1.6 % of
V
PN
(@
T
A
= +
25°C)
Standard 00 Year Week
or N° SP..
swiss
made
Back view
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