safety
Differences
This shows you the differences between two versions of the page.
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| safety [2026/01/16 04:10] – created olt | safety [2026/05/17 23:13] (current) – dsheen | ||
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| - | The radome poses a risk of high RF field exposure and of crushing from the moving dish. To prevent these hazards, a safety lock-out-tag-out (LOTO) lock system attached to the 3-phase power disconnects power to the RF power amplifiers and the motor drives. | + | The radome poses a risk of high RF field exposure and of crushing from the moving dish. To prevent these hazards, a keyed interlock |
| - | The 2 keys (A and B) on the disconnects in 54-2101 are required to open the radome hatch, and they cannot be removed from 54-2101 without turning off the disconnects. | + | The 2 keys (A and B) on the disconnects in 54-2101 are required to open the radome hatch, and they cannot be removed from 54-2101 without turning off the disconnects. This ensures power to the dish drives is disabled, and that the dish has had time to fully stop if it was moving, **before** the hatch to the radome can be opened. |
| - | Access procedure for the radome: | + | **Note:** Single phase 120V AC is still present in the radome and within the rotator even when the drives are disabled. |
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| + | **Access procedure for the radome:** | ||
| 1) Ensure that the dish is not in use by checking the [[https:// | 1) Ensure that the dish is not in use by checking the [[https:// | ||
| - | 2) Turn off both disconnects in 54-2101 by pushing the lever switches down. Insert the blocker bars into the LOTO locks. This may require rotating them to the right angle. | + | 2) Turn off both disconnects in 54-2101 by pushing the lever switches down. Insert the blocker bars into the locks. This may require rotating them to the right angle. |
| 3) Remove keys A and B from the disconnects. | 3) Remove keys A and B from the disconnects. | ||
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| 7) Remove keys A and B from the hatch lock. | 7) Remove keys A and B from the hatch lock. | ||
| - | 8) Reinsert keys A and B into the LOTO locks in 54-2101 and turn the disconnects back on. | + | 8) Reinsert keys A and B into the locks in 54-2101 and turn the disconnects back on. |
safety.1768536648.txt.gz · Last modified: 2026/01/16 04:10 by olt