voltage divider

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voltage divider:

see potentiometerpotentiometer.
1 Manually adjustable, variable, electrical resistor. It has a resistance element that is attached to the circuit by three contacts, or terminals. The ends of the resistance element are attached to two input voltage conductors of the circuit, and the third
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.

Voltage Divider

 

an electrical device for dividing a DC or AC voltage into parts. All voltage dividers consist of reactances or effective resistances.

Voltage dividers are usually used to measure voltage. At low voltages series-connected resistors (Figure l,a) are used.

Figure 1. Circuits of low-voltage voltage dividers: (a) resistive, (b) capacitive, (c) inductive; (u) and (U) voltages, (r) and (R) resistances, (C1) and (C2) capacitances, (L1) and (L2) inductances

Capacitive voltage dividers with fixed or variable capacitors (Figure l,b), as well as induction voltage dividers (Figure l,c), are used for alternating currents. Capacitive voltage dividers, which consist of several series-connected high-accuracy capacitors (Figure 2), are used in electric power

Figure 2. Circuit of a high-voltage voltage divider: (U), (U1), and (U2) voltages; (SG) spark gap; (R) reactor; (T) transformer, (V) volt-meter

engineering to take off small amounts of power from a high-voltage transmission line (up to 500 kilovolts). An autotransformer is an example of an inductive voltage divider.

N. G. VOSTROKNUTOV

voltage divider

[′vōl·tij di‚vīd·ər]
(electricity)
A tapped resistor, adjustable resistor, potentiometer, or a series arrangement of two or more fixed resistors connected across a voltage source; a desired fraction of the total voltage is obtained from the intermediate tap, movable contact, or resistor junction. Also known as potential divider.
References in periodicals archive ?
lt;<Resistive voltage dividers can have frequency and phase characteristics that allow operation at frequencies up to hundreds of kilohertz.
Features of broadband voltage dividers for the high frequency region, as well as for measuring pulse voltages.
To test high-voltage voltage dividers in substation conditions, it is advisable to develop the capabilities of high-voltage mobile calibration laboratories [13] for metrological certification, both transformers and voltage dividers with their actual load.
According to the results of the research, among the large-scale high-voltage converters of various types, high-voltage broadband voltage dividers of resistive-capacitive type have the most acceptable characteristics of the accuracy of high voltage conversion in accordance with class A of the International Standard IEC 61000-4-30.
Among the main scientific problems of the development of the theory and practice of high-voltage broadband voltage dividers, one should note the influence of the non-identical parameters of the R, C- elements of the high-voltage arm, the matching of the distribution of the potentials of the circuit of lumped R, C- elements and the spatial-field circuit of the divider, as well as the optimal damping of its circuit connections.
It is necessary to create high-voltage mobile calibration laboratories for metrological certification of both transformers and voltage dividers with their actual load at the substations.
Determination of frequency characteristics of high voltage dividers in frequency domain.
Characteristics of high voltage dividers designed for power quality measurement.
The experimental dependence of the tolerance of the same voltage dividers of the high voltage meter BBH--0,8-100M in the range of the input DC voltage variation 10 .
The experimental dependence of the tolerance of the same voltage dividers of the high voltage meter BBH-0,8-100M in the range of the input AC voltage variation 10 .
The paper [8] describes the circuit and design of the divider for a 400 kV network, which, although called a <<resistive>> voltage divider, is in fact is a resistive-capacitive voltage divider with parallel connection of R, C- elements.
In [10], the development of a pulse resistive voltage divider is described for recording a lightning impulse up to 500 kV.