2,808
edits
Changes
→Silver–Graphite (GRAPHOR)-Materials
<figtable id="tab:tab2.32">
<caption>'''Table 2.32: Physical Properties of Silver–Graphite (GRAPHOR) Contact Materials'''</caption>
{| class="twocolortable" style="text-align: left; font-size: 12px"
<figtable id="tab:tab2.33">
<caption>'''Table 2.33: Contact and Switching properties of Silver–Graphite (GRAPHOR) Contact Materials'''</caption>
<table class="twocolortable">
<tr><th><p class="s12">Material/</p><p class="s12">DODUCO-Designation</p></th><th><p class="s11">Properties</p></th></tr><tr><td><p class="s12">Ag/C</p><p class="s12">GRAPHOR</p></td><td><p class="s12">Highest resistance against welding during make operations at high currents,</p><p class="s12">High resistance against welding of closed contacts during short circuit,</p><p class="s12">Increase of weld resistance with higher graphite contents, Low contact resistance,</p><p class="s12">Low arc erosion resistance, especially during break operations, Higher arc erosion with increasing graphite contents, at the same time carbon build-up on switching chamber walls increases, GRAPHOR with vertical orientation has better arc erosion resistance, parallel orientation has better weld resistance,</p><p class="s12">Limited arc moving properties, therefore paired with other materials,</p><p class="s12">Limited formability,</p><p class="s12">Can be welded and brazed with decarbonized backing, GRAPHOR DF is optimized for arc erosion resistance and weld resistance</p></td></tr></table>
<figtable id="tab:tab2.34">
<caption>'''Table 2.34: Application Examples and Forms of Supply of Silver– Graphite (GRAPHOR) Contact Materials'''</caption>
<table class="twocolortable">
<tr><th><p class="s12">Material/</p><p class="s12">DODUCO Designation</p></th><th><p class="s12">Application Examples</p></th><th><p class="s12">Form of Supply</p></th></tr><tr><td><p class="s12">Ag/C 98/2</p><p class="s12">GRAPHOR 2</p></td><td><p class="s12">Motor circuit breakers, paired with Ag/Ni</p></td><td><p class="s12">Contact tips, brazed and welded contact parts, some contact rivets</p></td></tr><tr><td><p class="s12">Ag/C 97/3</p><p class="s12">GRAPHOR 3</p><p class="s12">Ag/C 96/4</p><p class="s12">GRAPHOR 4</p><p class="s12">Ag/C 95/5</p><p class="s12">GRAPHOR 5</p><p class="s12">GRAPHOR 3D GRAPHOR 4D GRAPHOR DF</p></td><td><p class="s12">Circuit breakers, paired with Cu, Motor-protective circuit breakers, paired with Ag/Ni,</p><p class="s12">Fault current circuit breakers, paired with Ag/Ni, Ag/W, Ag/WC, Ag/SnO<span class="s45">2</span>, Ag/ZnO,</p><p class="s12">(Main) Power switches, paired with Ag/Ni, Ag/W</p></td><td><p class="s12">Contact tips, brazed and welded contact</p><p class="s12">parts, some contact rivets with</p><p class="s12">Ag/C97/3</p></td></tr><tr><td><p class="s12">Ag/C 97/3</p><p class="s12">GRAPHOR 3</p><p class="s12">Ag/C 96/4</p><p class="s12">GRAPHOR 4</p><p class="s12">Ag/C 95/5</p><p class="s12">GRAPHOR 5</p><p class="s12">GRAPHOR 3D GRAPHOR 4D GRAPHOR DF</p></td><td><p class="s12">Circuit breakers, paired with Cu, Motor-protective circuit breakers, paired with Ag/Ni,</p><p class="s12">Fault current circuit breakers, paired with Ag/Ni, Ag/W, Ag/WC, Ag/SnO<span class="s45">2</span>, Ag/ZnO,</p><p class="s12">(Main) Power switches, paired with Ag/Ni, Ag/W</p></td><td><p class="s12">Contact profiles (weld tapes), Contact tips, brazed and welded contact parts</p></td></tr><tr><td/><td/></tr></table>
