Difference between revisions of "General Rules for Dimensioning of Contacts"
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| − | ===6.4.6 General Rules for Dimensioning of Contacts=== | + | ===<!--6.4.6-->General Rules for Dimensioning of Contacts=== |
| − | + | '''Recommended Minimum Contact Forces at Slightly Sliding Contact Make:''' | |
| − | + | <table class="twocolortable" style="text-align: left; font-size: 12px;width:40%"> | |
| − | + | <tr> | |
| − | + | <td>Gold</td> | |
| − | + | <td>0.03 N </td> | |
| − | + | </tr><tr> | |
| − | + | <td>Silver </td> | |
| − | + | <td>0.1 N</td> | |
| − | + | </tr><tr> | |
| − | + | <td>Tungsten </td> | |
| − | + | <td>0.5 N</td> | |
| − | + | </tr> | |
| − | + | </table> | |
| − | + | '''Contact Force Recommendations:''' | |
{| class="twocolortable" style="text-align: left; font-size: 12px;width:40%" | {| class="twocolortable" style="text-align: left; font-size: 12px;width:40%" | ||
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| − | + | '''General Rules for Dimensioning of Contact Rivets''' | |
| − | [[File:General Rules for Dimensioning of Contact Rivets.jpg|left|General Rules for Dimensioning of Contact Rivets]] | + | [[File:General Rules for Dimensioning of Contact Rivets.jpg|left|thumb|Figure 1: General Rules for Dimensioning of Contact Rivets]] |
{| class="twocolortable" style="text-align: left; font-size: 12px;width:100%" | {| class="twocolortable" style="text-align: left; font-size: 12px;width:100%" | ||
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| − | {| class="twocolortable" style="text-align: left; font-size: 12px;width: | + | |
| + | |||
| + | |||
| + | '''Failure Probability of Single and Double (Bifurcated) Contacts''' (according to Thielecke) | ||
| + | |||
| + | {| class="twocolortable" style="text-align: left; font-size: 12px;width:100%" | ||
|- | |- | ||
| − | + | !Contact force[N] | |
| − | | | + | !colspan="4" style="text-align:center"|'''Single contact''' |
|- | |- | ||
| − | + | ! | |
| − | + | !Ag | |
| + | !AuNi 5, Pt | ||
| + | !Ag | ||
| + | !AuNi 5, Pt | ||
|- | |- | ||
| − | | | + | |0.04 |
| − | + | | | |
| − | | | + | |1 x 10<sup>-4</sup> |
| − | + | | | |
| − | + | |2 x 10<sup>-8</sup> | |
| − | |- | ||
| − | |||
| − | |||
| − | | | ||
| − | |||
| − | |||
| − | |||
| − | |||
| − | |||
| − | |||
| − | |||
|- | |- | ||
| − | | | + | |0.1 |
| − | | | + | |2 x 10<sup>-3</sup> |
| + | |4 x 10<sup>-5</sup> | ||
| + | |8 x 10<sup>-5</sup> | ||
| + | |8 x 10<sup>-9</sup> | ||
|- | |- | ||
| − | | | + | |0.2 |
| − | | | + | |1 x 10<sup>-4</sup> |
| + | |8 x 10<sup>-6</sup> | ||
| + | |4 x 10<sup>-6</sup> | ||
| + | |4 x 10<sup>-8</sup> | ||
|- | |- | ||
| − | | | + | |0.3 |
| − | | | + | |5.5 x 10<sup>-6</sup> |
| + | |1.5 x 10<sup>-6</sup> | ||
| + | |1.8 x 10<sup>-7</sup> | ||
| + | |3.2 x 10<sup>-10</sup> | ||
|} | |} | ||
| − | |||
| − | |||
| − | |||
| − | |||
| − | |||
| − | [[File:Failure probability of a contact as a function of the voitage.jpg|left|Failure probability of a contact as a function of the voltage (according to Kirchdorfer); Ag/Ni10; 10 mA]] | + | <div class="multiple-images"> |
| + | <figure id="fig:Failure probability of a contact as a function of the voitage"> | ||
| + | [[File:Failure probability of a contact as a function of the voitage.jpg|left|thumb|Figure 2: Failure probability of a contact as a function of the voltage (according to Kirchdorfer); Ag/Ni10; 10 mA]] | ||
| + | </figure> | ||
| − | + | <figure id="fig:Failure probability of a contact as a function of the current"> | |
| − | function of the current | + | [[File:Failure probability of a contact as a function of the current.jpg|left|thumb|Figure 3: Failure probability of a contact as a function of the current (according to Kirchdorfer); Ag/Ni10; F<sub>k</sub> = 0.45 N; U = 24 V]] |
| − | + | </figure> | |
| − | + | </div> | |
| − | [[File:Failure probability of a contact as a function of the current.jpg|left|Failure probability of a contact as a function of the current (according to Kirchdorfer); Ag/Ni10; F<sub>k</sub> = 0.45 N; U = 24 V]] | + | <div class="clear"></div> |
==References== | ==References== | ||
[[Application Tables and Guideline Data for Use of Electrical Contact Design#References|References]] | [[Application Tables and Guideline Data for Use of Electrical Contact Design#References|References]] | ||
| + | |||
| + | [[de:Faustregeln_für_die_Kontaktdimensionierung]] | ||
Latest revision as of 14:01, 26 January 2023
General Rules for Dimensioning of Contacts
Recommended Minimum Contact Forces at Slightly Sliding Contact Make:
| Gold | 0.03 N |
| Silver | 0.1 N |
| Tungsten | 0.5 N |
Contact Force Recommendations:
| Signal relays | ≥ 3 cN |
| AC power relays | ≥ 20 cN |
| Automotive relays | ≥ 20 cN |
| Motor switches (Contactors) (Silver – Metal oxide contacts) |
0.05 - 0.08 N/A |
| Power switches | 0.1 - 0.2 N/A |
| Connectors (Gold coating) |
≥ 30 cN/contact element |
| Connectors (Silver coating) |
≥ 50 cN/contact element |
| Connectors (Tin coating) |
≥ 1 N/contact element |
General Rules for Dimensioning of Contact Rivets
| Dimensioning | Solid Rivets (1) | Composite Rivets (2) |
|---|---|---|
| a : d | 1.5 : 1 bis 2.5 : 1 | 2 : 1 bis 2.5 : 1 |
| a : b | 2.5 : 1 bis 10 : 1 | 3 : 1 bis 5 : 1 |
| c : b | ≥ 1 : 1 | ≥ 1 : 1 |
| b : s | ≥ 2 : 1 | |
| smin | ≈ 0.3 mm |
Failure Probability of Single and Double (Bifurcated) Contacts (according to Thielecke)
| Contact force[N] | Single contact | |||
|---|---|---|---|---|
| Ag | AuNi 5, Pt | Ag | AuNi 5, Pt | |
| 0.04 | 1 x 10-4 | 2 x 10-8 | ||
| 0.1 | 2 x 10-3 | 4 x 10-5 | 8 x 10-5 | 8 x 10-9 |
| 0.2 | 1 x 10-4 | 8 x 10-6 | 4 x 10-6 | 4 x 10-8 |
| 0.3 | 5.5 x 10-6 | 1.5 x 10-6 | 1.8 x 10-7 | 3.2 x 10-10 |
