Changes

The wide variety of thermostatic bimetal types is specified mostly through DIN 1715 and/or applicable ASTM standards <xr id="tab:tab5.23Partial Selection from the Wide Range of Available Thermo-Bimetals"/> (Table 5.23). The different types have varying material compositions for the active and passive side of the materials. The mostly used alloys are iron-nickel and manganese-copper-nickel. Mainly used in circuit protection switches (i.e. circuit breakers) some thermo-bimetals include an intermediate layer of copper or nickel which allows to design parts with a closely controlled electrical resistance.

<figtable id="tab:tab5.23Partial Selection from the Wide Range of Available Thermo-Bimetals">

For the design and calculation of the most important thermostatic-bimetal parts formulas are given in <xr id="tab:tab5.24Design Formulas for Thermostatic Bimetal Components"/> Table 5.24. The necessary properties can be extracted for the most common materials from <xr id="tab:tab5.23Partial Selection from the Wide Range of Available Thermo-Bimetals"/> Table 5.23. The values given are valid only for a temperature range up to approximately 150°C. For higher temperatures data can be obtained from the materials manufacturer.

<figtable id="tab:tab5.24Design Formulas for Thermostatic Bimetal Components">