 Fri Jun 30 11:17:57 2006, Doug Preddy, Normal Running, Solenoid recovered
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Tuesday night. June 27, 2006, the solenoid quenched for no apparent
reason. It was restarted Wednesday morning. The vacuum in the solenoid
went away (up to 8 Torr). This was found to be a result of a leaking
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Tue May 18 15:04:36 2010, Kevin Trithardt, Maintenance, Solenoid ramping up
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Tue Jul 14 15:28:36 2009, Doug Preddy, Quench Recovery, Solenoid ramped up
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The solenoid is cold and I have started to ramp up the power supply. Some slight ripples in the power leads, but they are dieing out. Liquid level is
a lot more stable this time. |
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Fri Nov 12 16:54:50 2010, Doug Preddy, Normal Running, Solenoid ramped up
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Tue Aug 14 10:15:22 2007, Doug Preddy, Maintenance, Solenoid ramped down
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| Solenoid ramped down and locked out for M9A slits work. |
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Wed May 30 08:38:38 2007, Doug Preddy, Quench Recovery, Solenoid quenched this morning
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Solenoid quenched this morning on power lead temp (I believe).
I restarted it at ~7:00, but the capacity control for the compressor would
not respond. I shut the system back down and checked as many relays as I
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Wed May 5 07:55:37 2004, Doug Preddy, Quench Recovery, Solenoid quenched on power lead temp 
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Solenoid quenched on power lead temp. I ran down and managed to recover it
with minimal temp rise in the solenoid. Coil temps are falling, liquid is
building. No flow to the power leads yet. |
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Mon Nov 19 02:58:44 2007, Doug Preddy, Quench Recovery, Solenoid quenched on power lead over temperature
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I received a page at 1:30 this morning. The power lead temperatures were
climbing. Cycling CV142 did not fix the problem. The solenoid quenched at
1:50.
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Fri Sep 26 09:45:18 2008, Doug Preddy, Quench Recovery, Solenoid quenched at 7:50
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| Compressor on. Turbines started. Vacuum system recovering. |
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Wed May 27 08:06:00 2009, Doug Preddy, Quench Recovery, Solenoid quenched at 5:00
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The solenoid quenched at 5:00 this morning due to power lead temps. The temps started oscillating about 10 minutes before the trip. The compressor and
the cold box stayed on. The flow to the solenoid was stopped.
The solenoid flow was started in parallel cold return at ~7:20. |
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Thu Jul 20 00:25:16 2006, Doug Preddy, Quench Recovery, Solenoid quenched @ 11:15
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Solenoid Quenched on C1 temp. It went above 5K. Shut off compressor.
Restarting system @ 12:15 |
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Sat Aug 23 17:02:38 2008, Doug Preddy, Quench Recovery, Solenoid quenched
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The solenoid quenched this afternoon at ~12:30. The compressor shut down. Fault lights were cold box trip.
Restarted the compressor by 3:30 and started
flow to the solenoid by 4:15.
Peter Yandon came down with Ops' radio to investigate the radios may trip the solenoid. When the radio is keyed the vacuum
guages jump. CG1, CG5 and the pirani gauges. This would trip of the refrigerator. More investigation to happen tomorrow and on maintenance day. |
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Mon May 3 07:49:54 2010, Doug Preddy, Quench Recovery, Solenoid quench Saturday
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Solenoid quenched at ~13:30 Saturday. Kevin came in later in the day to recover it. System was in all around mode, no flow to solenoid. Discharge pressure
went over 12 bar while starting flow and tripped the compresswor. After restart solenoid was cooling well.
Monday morning 7:30 I opened CV155 to increase the cooldown rate. |
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Tue Nov 23 07:47:00 2004, Doug Preddy, Quench Recovery, Solenoid quench Nov 21
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Solenoid quenched Nov 21 due to alarge power bump. Everything tripped off
including vacuum and water pumps. Cold box vacuum was at 3.6e-1, so pumped
it out overnight.
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Tue Jul 27 23:33:27 2004, Doug Preddy, Quench Recovery, Solenoid quench 9:30
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I was phoned at about 9:30 tonight with a solenoid alarm. After looking at
the display I found the system to be tripped off. When I came in I found
the compressor off and the solenoid quenched. There was no real indication
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Sat Jun 16 15:05:03 2007, Doug Preddy, Normal Running, Solenoid power lead temp problem
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Power lead temps rippling and increasing. I asked an operator to cycle
HIC142. This seems to have fixed the problem (for now). |
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Thu Oct 26 11:45:22 2006, Doug Preddy, Quench Recovery, Solenoid cold
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power leads cold 50% liquid.
Turning on power supply |
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Thu Sep 27 07:41:15 2007, Doug Preddy, Start Up, Solenoid cold
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Solenoid cold and in series mode. 50% liquid level. Starting flow to
powerleads. |
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Fri Nov 9 14:50:03 2007, Doug Preddy, Quench Recovery, Solenoid cold
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Solenoid cold. Added two bottles of helium. Allowing to stablize. Will
ramp power supply in half an hour. |
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Mon Jul 18 11:18:40 2005, Doug Preddy, Quench Recovery, Solenoid Quenched over the weekend
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The solenoid was found to be warm on Monday morning. M9Q3 had a bad water
leak over the weekend. The water header serving Q3 was turned off and the
leak confirmed. Q3 was isolated and the header was turned back on. My
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