LV25-P Datasheet, PDF (2/2 Pages) LEM – VOLTAGE TRANSDUCER LV 25-P

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
•General tolerance
•Fastening & connection of primary
•Fastening & connection of secondary
•Recommended PCB hole
± 0.2 mm
2 pins
0.635 x 0.635 mm
3 pins ∅ 1 mm
1.2 mm
Remarks
•I_S is positive when V_P is applied on terminal +HT.
•This is a standard model. For different versions (supply
voltages, turns ratios, unidirectional measurements...),
please contact us.
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 V_PN = 250 V
a) R ₁ = 25 kΩ / 2.5 W, I_P = 10 mA
b) R ₁ = 50 kΩ / 1.25 W, I_P = 5 mA
Accuracy = ± 0.8 % of V_PN (@ T_A = + 25°C)
Accuracy = ± 1.6 % of V_PN (@ T_A = + 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.