For applications in harsh environments the T-start can be installed with a special protective cup as shown in Figure.
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1. Base
2. Electric terminals
3. RF & EMI shielded protective cover
4. Magnet
5. Compression spring
6. Bronze rod
7. Bronze nose piece
8. Heat sensitive lock made from a shape memory alloy
9. Protective cup
10. ?O? Ring
11. Bushing
12. Housing made from a high-temperature plastic
13. Frame of reel
14. Electromagnetic coil
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The protective cup shields the T-start device from possible mechanical and environmental impacts, however, the cup reduces the sensitivity of the heat-sensitive element in the automatically operated T-start devices and as a result increases their activation time.
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