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Testing; Test Procedures - dehn PHV 1 P Instructions For Use Manual

Single-phase phase comparator with electronic indicator and visual and acoustic indication, nominal voltage up to 36 kv / 50 hz

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5. Testing

The function of a phase comparison is to verify in-phase conditions of three-phase systems. It is typical-

ly carried out at the disconnection point of:

Two networks

Two systems

Two system parts

Two conductors

etc. which are to be connected. In the following, this will be referred to as "system" (see Fig. 4).

 System 1

Fig. 4

System representation

5.1

The test procedures that will be described in the following are required to ensure clear phase compa-

rison and must be completely carried out unless the test should be interrupted. The specified sequence

must be observed.

The contact point for the test electrode at the part of the installation must be metallically bare. It must

be ensured that the test electrode only contacts the

Energised part of the installation,

Earthed part of the installation and

Unearthed part of the installation

to be tested.

The "out-of-phase" indication of the phase comparator appears if the phase angle between the sys-

tems (system parts) to be tested is between 60° and 300°, this corresponds to class B.

The phase comparator may be energised for max. 5 minutes and, in wet weather conditions, for max.

1 minute.

 System 2

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