Vaisala HUMICAP MMT310 Guía de usuario descargar pdf (Pagina 58)

USER'S GUIDE____________________________________________________________________

56 __________________________________________________________________ M210474EN-B

Water solubility of mineral transformer oil as a

function of temperature

Figure 1. The water solubility of transformer oils versus

temperature. The margins show the range of variation of water

solubility found in mineral oils.

Ppm-calculation for transformer

oils

Traditionally, moisture in transformer oil is measured by using

ppm-units. The ppm-output shows the average mass concentration

of water in oil.

The moisture and temperature transmitter MMT318 and MMT317

have an option for ppm-output provided that this has been notified as

placing the order of the transmitter.

NOTE

Silicone based oils must have the MMT318 and MMT317 with the

Calculation Model With Oil Specific Coefficients.

WATER SOLUBILITY IN MINERAL TRANSFORMER OIL

100

1000

10000

0 102030405060708090100

Temperature (°C)

average water

solubility

range of

variation due to

oil type

range of

variation due to

oil t

1 2 ... 53 54 55 56 57 58 59 60 61 62 63

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Vaisala HUMICAP MMT310 Guía de usuario Pagina 58