Measurements of electrical quantities. Voltage measurement

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ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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Section 1 General Rules

Measurements of electrical quantities. Voltage measurement

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Encyclopedia of radio electronics and electrical engineering / Rules for the installation of electrical installations (PUE)

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1.6.9. Voltage measurement, as a rule, should be made:

1) on sections of DC and AC busbars that can operate separately.

It is allowed to install one device with switching to several measuring points.

At substations, it is allowed to measure voltage only on the low voltage side, if the installation of voltage transformers on the higher voltage side is not required for other purposes;

2) in the circuits of alternating and direct current generators, synchronous compensators, and also in some cases in the circuits of special-purpose units.

In case of automated start-up of generators or other units, it is not necessary to install devices for continuous voltage measurement on them;

3) in the excitation circuits of synchronous machines with a power of 1 MW or more. In excitation circuits of hydrogenerators, measurement is not necessary;

4) in the circuits of power converters, batteries, chargers and chargers;

5) in circuits of arc extinguishing reactors.

1.6.10. In three-phase networks, as a rule, one phase-to-phase voltage is measured. In networks with voltages above 1 kV with an effectively grounded neutral, it is allowed to measure three phase-to-phase voltages to monitor the health of voltage circuits with one device (with switching).

1.6.11. The values of one phase-to-phase busbar voltage of 110 kV and higher (or voltage deviations from the set value) of power plants and substations should be recorded, the voltage at which the power system mode is maintained.

See other articles Section Rules for the installation of electrical installations (PUE).

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