[dsg-svt] Fwd: Re: Fwd: SVT Cooling System Trip Analysis (Hardware Interlock)

[Peter Bonneau]

The cable is ready to be installed. We have a 120V relay box ready and 
tested.

The power must be removed from the cRio to install so the SVT will need 
to be turned off.

Override keys will not work when the crate is not powered.

Power to the chiller will also be removed for installation.

Let us know when the SVT is off and power can be removed from the chiller.



On 8/22/2018 9:20 AM, Yuri Gotra wrote:
>
> Could you please provide update on this request, we are about to have 
> beam and the cable from the hardware interlock box to the pump relay 
> box is not yet installed. This could lead to the CVT down time due to 
> the issues with circuit breaker I reported. Thank you
>
>
> -------- Forwarded Message --------
> Subject: 	Re: [dsg-svt] Fwd: SVT Cooling System Trip Analysis 
> (Hardware Interlock)
> Date: 	Fri, 10 Aug 2018 08:51:22 -0400
> From: 	Yuri Gotra <gotra at jlab.org>
> To: 	dsg-svt <dsg-svt at jlab.org>
>
> Today's trip is caused by the circuit breaker. Around 4 am I started
> warming up the tracker to prepare for the target alignment work. The
> chiller and the external pump are on the same 20 A breaker (connected
> via the relay). The chiller draws 15 A and the pump 3 A. When heater is
> operational there could be current jumps over 20 A. Bob requested
> separation of the pump and the chiller power which requires extra relay
> box. Could you please provide another relay box with additional control
> line from the hardware interlock box connected to the interlock system
> the same way as for the existing relay box. I believe splitting the same
> control line would do. Thank you
>
>
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