fukt i fjärrvärmerör, larmsystem och detektering - Svensk Fjärrvärme
fukt i fjärrvärmerör, larmsystem och detektering - Svensk Fjärrvärme
fukt i fjärrvärmerör, larmsystem och detektering - Svensk Fjärrvärme
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We recommend that the following investigations be performed:<br />
• Determining the break down voltage for insulation as a function of the gap<br />
between measuring wire and steel pipe<br />
• Means to check the position of the measuring wire using TDR during<br />
manufacturing pre-insulated pipes and components<br />
• Determining basic data for the PUR insulation, i.e. electrical conductivity and<br />
its changes as a consequence of the presence of water with different salt<br />
contents<br />
• Determining the electrical properties of moist insulation<br />
At a later stage, these investigations may be followed by studies of mechanisms for<br />
damage in test rigs in order to determine the sensitivity of the systems to quantity of<br />
moisture, its geographical distribution, time delays to response, etc<br />
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