LV100 Datasheet, PDF (2/2 Pages) LEM – Voltage Transducer LV 100

Dimensions LV 100 (in mm. 1 mm = 0.0394 inch)
Front view
Left view
Secondary terminals
Terminal + : supply voltage + 15 V
Terminal M : measure
Terminal - : supply voltage - 15 V
Connection
Top view
Mechanical characteristics
•General tolerance
•Fastening
•Connection of primary
Fastening torque
•Connection of secondary
± 0.3 mm
2 holes ∅ 6.5 mm
M5 screw terminals
2.2 Nm or 1.62 Lb - Ft.
Faston 6.3 x 0.8 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 100
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 = 1000 V
a) R ₁ = 100 kΩ /40 W, I_P = 10 mA
b) R ₁ = 400 kΩ / 5 W, I_P = 2.5 mA
Accuracy = ± 0.7 % of V_PN (@ T_A = +25°C)
Accuracy = ± 2.5 % 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 100 to 2500 V.
LEM reserves the right to carry out modifications on its transducers, in order to improve them, without previous notice.