Interlock Defeat

System(s) Affected:
Optics

Interlock to be Defeated:
Temporary 1AQ16 power supply running with no interlocks

Implementation:	Number:
Date: 2023-11-22 Time: 18:45:00	2023-619
Implemented By: Eric Chapman
In Consultation With:

Status: Removed

Estimated Duration:
1 weeks

Reason for Defeat:
One of the 1AQ16 power supplies failed and has been replaced by a temporary replacement. This replacement 1AQ16 power supply is currently running with no interlocks.

Number of Yellow Tags:
2

Location of Defeat Tag(s):
DCR console and defeats board

How Was Defeat Implemented?
Where is Defeat Located?:
Power supply must be shut down locally in the event of Cu-ALCW cooling loss.

Describe Alternate Protection:
Manual operation, alternate protection to come later. Operation of this temporary power supply approved via Doug Preddy over the phone to 100A maximum.

Fault Reports:

Work Permits:
C2023-11-22-3

Disables:

Interlock Defeat

Removal:	Number:
Date: 2023-11-29 Time: 10:00:00	2023-619
Removed by: David Bandiera

Status: Removed

Interlock Verification Method:
Water flow interlock added to temporary spare Lambda P/S by Controls group under WP#: C2023-11-28-3. Interlock functionality verified by shutting off water flow to 1AQ16 at valve in South TNF and both P/S shut off. Tested by Beamlines group during maintenance day Nov 28 under WP#: C2023-11-28-13.

Number of Tags Removed:
2

Comments:

David Bandiera: 2023-11-29 10:11:52.895114
Temporary Lambda P/S is now running at 200A, up from 100A before the water flow interlock was in place. Plone note "1AQ16 until end of 2023" updated by F.H.

Interlock Defeat / Device Disable Management System v1.5 (Driver)

Interlock Defeat

Interlock Defeat

Interlock Defeat / Device Disable
Management System v1.5 (Driver)