[Dsg-hallb_magnets] Solenoid - Sequence of pre-power up I and C checks

[Pablo Campero]

Ruben, 

We will start the checks this afternoon. 
With regards to Onish's email, first action is check and make sure that all interlocks faults are clear, that includes the hardware interlocks (liquid levels, cryocon units, lead water flow), this hardware interlocks also affects the Quench Det. status on the PS control module (status in remote control board) and the MPS D ump switch engages. 
I verified PLC side and it seems to be fine, there is no 'PLC Fast Dump interlocks' at this time. PLC relay outputs associate with the 'Fast dump interlocks' are clear. 

Best Regards, 
Pablo 


From: "Ruben Fair" <rfair at jlab.org> 
To: "Onish Kumar" <okumar at jlab.org> 
Cc: "Brian Eng" <beng at jlab.org>, "Pablo Campero Rojas" <campero at jlab.org>, "Probir Ghoshal" <ghoshal at jlab.org>, "Sarin Philip" <philip at jlab.org>, "Mark Todd" <mtodd at jlab.org> 
Sent: Monday, August 21, 2017 11:44:43 AM 
Subject: Re: [Dsg-hallb_magnets] Solenoid - Sequence of pre-power up I and C checks 

Thank you Onish and Mark. 

Pablo, Brian, 

Can you check all this out this afternoon - see Onish's note below. 

Regards 

Ruben 



From: "Onish Kumar" <okumar at jlab.org> 
To: "Ruben Fair" <rfair at jlab.org> 
Cc: "Brian Eng" <beng at jlab.org>, "Pablo Campero Rojas" <campero at jlab.org>, "Probir Ghoshal" <ghoshal at jlab.org>, "Sarin Philip" <philip at jlab.org>, "Mark Todd" <mtodd at jlab.org> 
Sent: Monday, August 21, 2017 11:41:07 AM 
Subject: Re: [Dsg-hallb_magnets] Solenoid - Sequence of pre-power up I and C checks 

Hi Ruben, 

We have finished our checklist today (see attachment). While working on our checklist we found that QD PLC inputs are not making contact. I think Pablo and Brian should check on their side if QD PLC relay's are good (Below is the list of interlock to check, PLC side). To make sure something is not wrong on our side we check the wiring and did continuity tests, and the test passed, hence I suspect issue on the PLC side. We did all of our test by taking connector X15 off and putting jumpers between pins A & H, and between pins J & K. 

List of interlock to check: 
1. Quench Det. Fast Ramp Down 
2. Fast Dischange 
3. Energy Dump Status 
4. Control PLC status. 

Please note all the interlocks mentioned above are in series, so if any one of them is not making contact then they will show-up as Quench Det. (on the PS control module) and the Dump switch engages. Let us know if you have any questions or concerns. 

Thanks, 
Onish 

-- 
Onish Kumar 
DC Power Systems Engineer 
Jefferson Lab, EES-DCP 
Email: okumar at jlab.org 
Phone: (757) 269-7852 


From: "Ruben Fair" <rfair at jlab.org> 
To: "Brian Eng" <beng at jlab.org> 
Cc: "Pablo Campero" <campero at jlab.org>, "Onish Kumar" <okumar at jlab.org>, "Probir Ghoshal" <ghoshal at jlab.org>, "Sarin Philip" <philip at jlab.org> 
Sent: Thursday, August 17, 2017 12:06:40 PM 
Subject: Re: [Dsg-hallb_magnets] Solenoid - Sequence of pre-power up I and C checks 

Ok 

Onish - we have to wait till you complete your work 

Ruben 

> On Aug 17, 2017, at 11:15 AM, Brian Eng <beng at jlab.org> wrote: 
> 
> Ruben, 
> 
> Pablo and I just went through the interlock checkout and I don't think there's any we can start early with. 
> 
> We either need the MPS to be operational (in order to have some current or to close the fast dump contactor) or to have all the interlocks cleared as the first step. 
> 
> Unless we change the procedure to not require all the interlocks to be cleared at the very least we'll have to wait for DC power to finish their MPS work before starting. 
> 
>> On Aug 17, 2017, at 9:34 AM, Pablo Campero <campero at jlab.org> wrote: 
>> 
>> Hello Ruben, 
>> 
>> Brian and I will start with the Pre-Power Up checks today. 
>> To complete with the full test for most of the 'Fast Dump- Hardware Interlock' checkouts is required to turn on the PSU to verified correct function of the dump switch and remote resets on the PSU. 
>> Will someone will be available to turn on the PSU after the replacement of the connector in the remote crate and re-tune of the QD units? 
>> 
>> Best Regards, 
>> Pablo 
>> 
>> From: "Ruben Fair" <rfair at jlab.org> 
>> To: "Onish Kumar" <okumar at jlab.org>, "Probir Ghoshal" <ghoshal at jlab.org>, "Pablo Campero Rojas" <campero at jlab.org>, "Brian Eng" <beng at jlab.org>, "Nicholas Sandoval" <sandoval at jlab.org> 
>> Cc: "George Biallas" <biallas at jlab.org>, "Scot Spiegel" <spiegel at jlab.org> 
>> Sent: Thursday, August 17, 2017 7:40:46 AM 
>> Subject: Solenoid - Sequence of pre-power up I and C checks 
>> 
>> Gentlemen, 
>> 
>> Some of the I and C checks for pre-power up will have to be carried out in sequence (e.g. anything to do with the QD units): 
>> 
>> 1. Replace connector on PSU remote control crate + complete both PSU check sheets - Onish (to be completed by Friday 18th Aug) 
>> 2. Re-tune QD units - Probir (by Thursday 24th Aug) - as Probir is out Mon-Wed next week) 
>> 3. Checks (including interlock checks) on QD units (by Friday 25th Aug) - Pablo/Brian/Nick - though of course you can make a start on the other checks 
>> 
>> As our cooling rate has increased (we are presently cooling at about 10 K/day), we won't have as much time as we initially thought so we should start as soon as possible. 
>> 
>> Regards 
>> 
>> Ruben 

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