| Presentation | 2001/8/14 Functional Safety of Protection Devices for Electric Heaters : PART 1 Hirotaka Shimizu, Yoshinobu Sato, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In order to specify SIL, the IEC61508 standard classifies the operation modes of SRSs into two categories, low demand mode of operation and high demand/continuous mode of operation. However, it is not clear which modes of operation should be applied to the protection devices of the heaters. Then, the present paper investigates the relationships among failures of the protection devices, demand to operate the heater and the hazardous event, i.e., breaking out of fire by use of fault tree analyses involving sequential failure logic AND-gates(priority AND-gates). Finally SILs of the protection devices are specified using the ratios of hazardous event to demand frequencies. Thus, the present paper demonstrates the procedure how to combine SILs of the protection devices with risk analyses of the overall electric heater-systems. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | safety integrity level / modes of operation / frequency of harmful event / safety-related system / functional safety / fault tree analysis / protection devices for electric heaters |
| Paper # | SSS2001-15 |
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| Conference Information | |
| Committee | SSS |
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| Conference Date | 2001/8/14(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Vice Chair | |
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| Paper Information | |
| Registration To | Safety (SSS) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Functional Safety of Protection Devices for Electric Heaters : PART 1 |
| Sub Title (in English) | |
| Keyword(1) | safety integrity level |
| Keyword(2) | modes of operation |
| Keyword(3) | frequency of harmful event |
| Keyword(4) | safety-related system |
| Keyword(5) | functional safety |
| Keyword(6) | fault tree analysis |
| Keyword(7) | protection devices for electric heaters |
| 1st Author's Name | Hirotaka Shimizu |
| 1st Author's Affiliation | Hitachi-Kokusai Electric Inc.() |
| 2nd Author's Name | Yoshinobu Sato |
| 2nd Author's Affiliation | Tokyo University of Mercantile Marine |
| Date | 2001/8/14 |
| Paper # | SSS2001-15 |
| Volume (vol) | vol.101 |
| Number (no) | 252 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |