Notes on the New Front-End Crate Low Voltage Power Supplies --------------------------------------------------------------- Original Rev. 12-Mar-2012 Current Rev. 19-Apr-2013 The first Wiener PL506, for evaluation as a replacement Front-End crate low voltage power supply was ordered on about 17-May-2011. Specifically what was ordered: PL506_EX_3U Floating Power Supply PL506 consisting of: Micro-processor controlled plug-in power supply (3U hight) with 3 floating DC output channels, individually sensed, maximum output 1000W - 3000C (110/220V), low noise and ripple, air cooled, 3 DC outputs: +5V/115A, -5V/115A, -5.2V/115A AC auto-range input 95 ... 264 VAC / 16A with power factor correction, with alpha-numeric display and combo interface for remote control (Ethernet, USB) 3U hight RASO power bin The price for this supply was about $5,862.00 This first PL506 supply was received at MSU on 8-Nov-2012. Serious testing and evaluation of this supply did not begin until 13-Mar-2013. Notes from 13-Mar-2012 from initial look at the first PL506 ------------------------------------------------------------- - No instruction manual at all came with the supply. I did find and get a PL506 manual from their US web site. - There is the first obvious issue that the "Power Box" can hold up to 6 supplies, we have only 3 installed, but they crammed them all right next to each other. With this setup we clearly will not get even vertical air flow through this power supply, nor does it make sense for its own cooling to have all the parts crammed right next to each other. - The RASO "Power Bin" is labeled: Type RASO Powerbin 6 Channel Part No. 0B16.0600 Serial No. 3789009 - The "Power Box" is labeled: Type PL506 Part No. 0P13.0006U Serial No. 3589022 MAC Adrs 0050-C22D-CC58 U0 5.0V 115A U1 5.0V 115A U2 5.2V 115A - The University of Maryland property tag on this first LV power supply is: UMD 211124. - The front panel control stuff on the PL506 is not exactly the same as on the Wiener VME crate power supplies. For example, at least with the default setup, the 3 supplies do not start up at the same time. Rather you need to tell each of the supplies individually to start up. I don't know yet how much you can program from the front panel and to what extent you need either their USB or Ethernet control program to setup the supply. - Power Output Studs on the Power Bin These appear to be M6 studs and take a 10mm thin wall driver. They appear to be a copper alloy and not the preferred steel. That is tightening these nuts to the proper torque is going to be an issue. Too loose and the connection burns up, just a little too tight and you break off the stud. The power output studs are hidden back between 2 horizontal mechanical support bars that run the full width of the power bin. These bars stick out about 0.29" past the flat boss part of the power output studs. There is about 0.70" from the edge of the stud threads to the close edge of one of these bars. So the lug that you put on the stud needs to make an immediate bend of about 30 degrees or so. There is still room to get on a thin wall socket. The good part is that these bars are tapped so that is a nice setup to anchor the power output cables so that they do not pull on the weak studs. - During this initial look at this supply I ran it and loaded all supplies up to the 80 to 90 Amp range. Everything looked OK so I believe that it arrived at MSU in good shape. DC Power Cable Specification Questions 14-Mar-2012 --------------------------------------------------- - Need to learn how the current Milagro power supplies are wired to the crate. The big issue is where to the +5V, -5V Analog and -5.2V digital returns all tie together. Note that none of the Ground pins on the Analog card are common with the Ground pin on the Digital card. Where is this common point tied to the "rack" "system" ground. - Are we going to use Remote Sensing in the new front-end crate supplies for HAWC ?? - The supplies are rated for a 115 Amp output. Thus the Fermilab electrical safety manual would require: 1 to 3 conductors in a bundle AWG #2 115 Amps max 4 to 6 conductors in a bundle AWG 1/0 120 Amps max This Fermilab specification is based on 75 deg C maximum copper temperature in a 30 deg C ambient temperature. How much more careful does HAWC want to be because of the high altitude and un-attended operation ?? I would guess that AWG #2 is cutting it too close. - Specifications for wires sizes in this range: Resistance at 25 C Cross Section Size mill-Ohm per foot sq mm ---- ------------------ ------------- 4 0.2533 21.15 2 0.1593 33.62 1 0.1264 42.41 1/0 0.1002 53.49 2/0 0.07947 67.43 The cross section of the M6 power supply stud is about: 5.0 mm Dia --> 19.6 sq mm 5.2 mm Dia --> 21.2 sq mm 6.0 mm Dia --> 28.3 sq mm - Stranding used on the DC power cables, to big and it is too stiff, too small and they break. The good small size is in the 15 to 20 mil range, i.e. AWG 26 to 24 range. - Probably want tinned conductor wire with 105 deg C PVC insulation assuming that PVC is allowed in the HAWC counting house. - The heaviest current draw is expected to be about 88 Amps on the -5.2V digital line. I believe that these power supplies will be mounted about 3U above the top of the Front-End crates. Thus a per supply total DC cable length of about 10 feet may be all that is needed. In any case it would be good to keep the DC drop on these cables down under 100 mV. Is DC power feed to both the left-hand and right-hand sides of the crate to give more even distribution ? I.E. do we need to find parts so we can have 2 lugs per power supply stud or 2 cables per lug ? The FEB Manual says power feed to the crate from left and right. Separate return lines for each of the 3 supplies or is there one common return line between the carte and the power supply chassis ? Where are the Analog card ground and the Digital card ground tied together ? Andeas Ruben visit on 20-March-12 --------------------------------- - We ran the supplies with the MUSEcontrol software. Clearly that is the rational way to initially run and setup these supplies. - Verified OK for 208 V AC operation from 2 hot phase leads. - For the bulk order just need to specify that we want the supplies spaced out for even air flow and that we will be running the supplies from 2 hot phase leads 208 V AC to get fuses in both sides of the line. - There is some national lab that wants only one fuse for 120 V AC operation. - OK to space out the supplies in this initial unit. More Testing ------------ - Installed MUSEcontrol on the Rm 2150 Evo machine and took it to 1200C to run the supply with the load box. - Ordered with Jim's MSU HAWC money: Description: USB Cable 6 ft "A" to "B" Digi-Key Part No. Q364-ND Discription: Fuse type 326p 15 Amp 250 Volt Digi_Key Part No. F2649-ND Littlefuse Part No. 0326015.HXP Description: Hirschmann STAK 3 N Female Plug Cable Socket Description: Hirschmann STASI 3 Clips - Made a 208 V AC power cable so that I could test at both 120 V AC and 208 V AC. - Most of the Power Box assembly screws are 3mm. The nuts on the output terminals of the high current modules are 8mm. The Power Box DC output socket nuts are 17mm. The RASO Power Bin stud nets are 10mm (thin-wall socket is best). Final testing before shipping - running with MUSEcontrol 6-Apr-12: ------------------------------------------------------------------- Module Module Load Sense Output Dana Output Box Supply Voltage Voltage Voltmeter Current Current ------ ------- ------- --------- ------- ------- U0 5.002 5.013 5.0027 9.8 9.9 5.003 5.108 5.0024 80.8 80.6 after 22 min 5.002 5.113 5.0034 80.7 80.3 "Hot Spot" is 42 deg C and stable Down to 31 deg C in 5 min at 10 Amp load U1 5.001 5.013 5.0036 9.8 9.9 5.002 5.100 5.0027 79.8 79.7 after 25 min 5.002 5.104 5.0038 79.6 79.3 "Hot Spot" is 42 deg C and stable Down to 29 deg C in 10 min at 10 Amp load U2 5.201 5.215 5.2028 10.2 10.3 5.202 5.318 5.2034 84.1 84.0 after 25 min 5.201 5.322 5.2039 83.7 83.5 "Hot Spot" is 41 deg C and stable Down to 29 deg C in 7 min at 10 Amp load Running from 208 V AC I check the leakage current to chassis ground (safety ground) from all of the output terminals. In all six cases the current was less than 1 uAmp after 10 seconds or so. This was measured as the voltage across a 50 k Ohm resistor which in all cases was 1 mV DC or less. Shipped the supply UMD 211124 to Los Alamos on 9-Apr-12 ------------------------------------------------------- Shipping - Operating Notes: Besides the power supply itself I put in the box: - the normal 120 V AC line cord for it, - one of the special "Hirschmann STAK 3 N" power connectors that plug into the supply for use if you want to make a 208 V AC power cord for it, - a USB cable to connect it to a normal USB connector on a computer. There are 2 things that you will probably want to get from the Wiener web site: http://file.wiener-d.com/ - in the /documentation/PL506-PL512/ web directory you can get the manual for the PL506 & PL512 series power supplies, - in the /software/MUSEcontrol/ web directory you can get the latest version of their "MUSEcontrol" software for setting up and running the power supply. I would suggest using the MUSEcontrol software. It makes it easier to run the power supply and see what it is doing. You can run it and monitor it from the front panel but MUSEcontrol is an easier way to do it. I installed MUSEcontrol on a windows XP system as their manual suggests. I believe that their intent is that one should use the USB MUSEcontrol software to initially setup the power supply "on the bench" and then use the Ethernet interface to control and monitor the supply (or set of supplies) once they are installed in the experiment. Operating Notes: - You can just run it from a normal 120 V AC wall plug to get things started. It can easily power a 1/2 full front-end crate from 120 V AC line power. - To run the supply I set it up on a couple of strips of 2 by 4 to hold it up off of the table so that air could get into it. In the real HAWC rack layout there will be a fan try under each power supply to help push air up through them. - When you plug it into the wall it is normal to hear a small click sound after 2 or 3 seconds and then after about 5 seconds the front panel LED indicators will flash ON for just a 1/2 second or so. The click sound is a relay closing after the input capacitor bank has charged up. - The small front panel ON-OFF switch is just a control level signal to the micro-processor controller. Any time that the supply is plugged in the full AC line power is applied to the inner workings and the 380 V DC bus is hot. There is no real AC power disconnect switch on the supply. - There is a shipping strap across the front of the "Power Bin" to help keep the Power Bin straight and to keep the "Power Box" seated in the Power Bin during shipping. - On the back of the Power Bin, the nuts on the studs for the DC output cables require a 10mm socket. I had to use a thin-wall socket to get a good fit with the lugs on the DC power cables that I was using. I do not have a torque specification for these nuts - but the studs appear to be some copper brass alloy (not steel) so it takes a rational person to get them full tight enough for a good connection but not break them off. Not a job for a full professor. - I put some labels on the back about how you may want to use the 3 supplies in the Power Box for + - 5 Analog and -5.2 Digital but you can obviously use them any way that works out best. - You can adjust the actual output voltage with the MUSEcontrol software to get the voltage that you want at the load. If we were using remote sense then the MUSEcontrol will display both the voltage at the load and the voltage that the supply is actually putting out. Things that I do not like about these supplies: - They have circuit board components mounted very near the surface of the perforated top and bottom metal covers. I tried to be careful to never set the supply and a surface that could dent in one of these covers. - I wish that they had used bigger heavier output studs. 7-June-2012 Notes from Robert DeLay with slight re-formatting --------------------------------------------------------------- From Robert DeLay's note on 6-June-2012 I made some measurements assuming we have 4u of space above the frontend crate and dc supply. - For the plus five volts we need a 39" cable and a 50" cable if the dc supply is set up like the current one. - For the minus five volts we need one cable 36" and one 42" long. - For the minus five point two volt supply we need one cable 44" and one 34". - The ground for the plus and minus five needs to be 55" long and the lug on the end that mount to the crate needs to be a little less than three eights wide.  It has to fit in between the two connectors for the digital boards. - The grounds for the five volt supplies should be 37" and 31" long. (D.E. I assume that this should read, ... ground for the -5.2V Digital supply ...)   - All the lugs on the crate side except for the -5.2 ground should be square lugs that are no more than one half inch wide with a small hole.  The screws in the crate side are about 6/32 that hold the cable in place. - On the dc supply side if we put more than two lugs on one output mount the nut is flush with the end.   I don't know if there's a crimp that can take two cables but it might save space.  - The current cables are 4awg 600volt and 105c. I could make the cables but we have no cable and I have no crimp tool. We need to ship this soon so should we get the parts and tools or do you have what we need? From Robert DeLay's note on 7-June-2012 I included the 4u space in the measurement between the dc supply and the crate. If you could make the cables and ship them out here that would be great Proto-Type DC Power Cables for the HAWC Front-End Crates ---------------------------------------------------------- Original Rev. 7-June-2012 Current Rev. 13-June-2012 Draft Specifications for the DC Power cables for the Front-End Crates: - There are 5 crates so assume that 6 sets of cabes should be built (or at least enough parts on hand to make 6 sets for long term support of HAWC). 6 Set Total P.S. Crate Cable Type Length(s) Color Length Terminal Terminal -------------- --------- ----- ------ ---------- ---------- +5V Analog 39" & 50" Red 44.5' LCA4-14H-L LCA4-10-L -5V Analog 36" & 42" White 39.0' LCA4-14H-L LCA4-10-L Return Analog 55" Black 27.5' LCA4-14H-L LCAN4-10-L -5.2V Digital 34" & 44" Yellow 39.0' LCA4-14H-L LCA4-10-L Return Digital 31" & 37" Black 34.0' LCA4-14H-L LCA4-10-L +5V Return to ? Black ? -5V Return at the Power Supply Connection to ? Black ? the Common Ground Crate End Terminal Requirements from Robert: (confusing) - The ground for the plus and minus five needs the lug on the end that mount to the crate needs to be a little less than three eights wide. - All the lugs on the crate side except for the -5.2 ground should be square lugs that are no more than one half inch wide with a small hole. The screws in the crate side are about 6/32 that hold the cable in place. Review of basic safety points: AWG #4 is rated for 85 Amps (30 deg C Ambient, 75 deg C Copper) Bolted connections require a contact surface area of at least 1 square inch per 1000 Amps Bolted connections require at contact pressure of at least 2000 pounds per square inch. Possible Wire: All wire was specified to me to be AWG #4. I will use 105 deg C stranded tinned copper wire. The stranding is 133 AWG #25 strands. This should have a 0.266" conductor O.D. 75ft Black Maney # 12834133T0 per foot O.D. 0.386" # 12834133T0-100 for 100 ft 50ft Red Maney # 12834133T2 per foot O.D. 0.446" # 12834133T2-100 for 100 ft 50ft Yellow Maney # 12834133T4 per foot O.D. 0.446" # 12834133T4-100 for 100 ft 50ft White Maney # 12834133T9 per foot O.D. 0.446" # 12834133T9-100 for 100 ft Maney Wire: http://www.maneywire.com/ Alpha Wire type: 784133 Power Supply Terminals: - The power supply studs are M6. The closest commonly available English size is 1/4". Possible choices are: Panduit: LCA4-14H-L or LCA4-14F-L (Pkg 50 45 deg and 90 deg) (90 deg height 1.12" ) (LCA strip length 0.875" ) Panduit: PV4-14R-E (pkg of 20) Molex: 0190670082 DK No. WM4317-ND 67 mils thick 0.475 wide 0.280" conductor max O.D. 1.850 long including insulation tinned copper ??brazed?? insulated Molex: 19193-0275 DK No. WM19134-ND 75 mils thick 0.465 Wide 1.288" long 0.280" conductor max O.D. 0.425" crimp length tinned copper brazed seam non-insulated Front-End Crate Terminals: Panduit: LCA4-10-L or LCAN4-10-L (Pkg 50 standard and narrow) (the narrow is 0.40" wide ) (LCA strip length 0.875" ) Panduit: PV4-10R-E (pkg of 20) TE Connectivity: 33114 DK No. A27082-ND 70 mils thick 0.500 Wide 1.199" long tinned copper brazed seam non-insulated Molex: 19193-0273 DK No. WM19133-ND 75 mils thick 0.465 Wide 1.288" long 0.280" conductor max O.D. 0.425" crimp length tinned copper brazed seam non-insulated Required Dies: Dies for CT-720 tool: Panduit Die CD-720-1 Panduit Die CD-720PV8-2 (have) ------------------------------------------------------------- 19-June-2012 Build 6 sets of cables. Orders for parts to make the cables: ------------------------------------------------------------- Order #1 4 items from a company called Panduit all ordered from Newark Electronics http://www.newark.com/ Enter the Newark Part Number into their Search Window Total Cost for Order #1 is about $856.00 Lug for #4 AWG wire 1/4" hole 45 deg. Panduit No. LCA4-14H-L Newark Part No. 42H5448 Quantity to order: 60 Price about: $7.06 each thus about $423.60 for this item Expected Lead-time for this item about: 15 days Lug for #4 AWG wire #10 hole thin tongue Panduit No. LCAN4-10-L Newark Part No. 64K1329 Quantity to order: 15 Price about: $10.37 each thus about $155.55 for this item Expected Lead-time for this item about: 21 days Lug for #4 AWG wire #10 hole standard Panduit No. LCA4-10-L Newark Part No. 50F1272 Quantity to order: 1 box of 50 pieces Price about: $189.73 for one box of 50 pieces Expected Lead-time for this item about: 12 days Crimp Die 8 AWG to 2 AWG for use in CT-720 tool Panduit No. CD-720-1 Newark Part No. 01C2459 Quantity to order: 1 Price about: $87.12 each Expected Lead-time for this item about: in stock ------------------------------------------------------------- Order #2 3 types AWG #4 wire ordered from Interstate Wire http://www.interstatewire.com/ Enter the Interstate Wire part number into their Search Window The contact that I worked with at Interstate Wire to get price information on this wire is: Lisa Bell Total Cost for Order #2 is about $423.00 4 AWG Stranded Tinned Copper UL AWM Style 1283 Black Wire Interstate Wire Part No. WPB-4133-0 Order Length: 100 ft Price: $1.41 per ft Total Cost for this item about: $141.00 4 AWG Stranded Tinned Copper UL AWM Style 1283 Red Wire Interstate Wire Part No. WPB-4133-2 Order Length: 100 ft Price: $1.41 per ft Total Cost for this item about: $141.00 4 AWG Stranded Tinned Copper UL AWM Style 1283 White Wire Interstate Wire Part No. WPB-4133-9 Order Length: 100 ft Price: $1.41 per ft Total Cost for this item about: $141.00 ------------------------------------------------------------- Order #3 2 types of heat shrink tubing http://www.digikey.com Enter the Digi-Key Part Number into their Part Search Window Total cost for Order #3 is about $32.74 Heat Shrink Tubing 1/2" ID Black Adhesive Lined 3M No. EPS-200 1/2" BL 48"BX Digi-Key No. EPS2012-ND Quantity to Order: 5 pieces Price about: $5.80 each thus about $29.00 for this item Heat Shrink Tubing 1/2" ID Clear Alpha No. F221B1/2 CL210 Digi-Key No. A012C-4-ND Quantity to Order: 2 pieces Price about: $1.87 each thus about $3.74 for this item ------------------------------------------------------------- Summary of what is being built: Just a note to let you know that I have made some progress with the new LV cables for the front-end crates. - As requested the wire will be #4 AWG. I'm getting the flexible type with 133 strands of AWG #25 inside. It is a 105 deg C cable. I'm getting 4 different colors to help make it clear what is connected to what. - From the nice pictures of the crate LV wiring that you have supplied I believe that most of the lugs at the crate end of the cables are Panduit type LCA4-10-L. - For the common +-5V analog return on the front side of the crate (the lug that must be very narrow) I have ordered a special narrow Panduit type LCAN4-10-L. - For the power supply end of the cables the lugs must clear the bars that are above and below the power supply output studs. For this I have ordered lugs with a 45 deg bend, Panduit type LCA4-14H-L. I stayed with Panduit because that looks like what was used in the original cables and I have the correct crimp tool for these lugs. All of these lugs fit the electrical code standards. I have ordered all of this material but some of it will take a while to get here. I could not find a distributor with the 2 specialized types of lugs in stock. I will assume that the lengths you specified are from the center of lug hole to center of lug hole. Four quick points to think about: - Do you need a cable to tie the common +-5V analog return to the experiment system ground ? - Along the long axis of a given cable, having the 2 lugs on that cable correctly indexed with respect to each other (in the sense of the rotation of one of the lugs wrt the other) can make the cables a lot easier to connect. If the 2 lugs have the correct relative rotation wrt each other then you do not need to twist a cable in a tight spot right where it connects to the crate or P.S.. Do you want me to make the first set of cables 1" extra long and with zero degrees relative rotation between the 2 lugs. You could then try them and tell me e.g. "the lug on the P.S. end of the bla cable needs to be rotated 45 deg CW" or whatever and I would cut off 1" and install a new lug to make the cables fit correctly. - Under a serious fault condition the single #4 AWG common +-5V analog return cable could carry up to 115 Amps (the specified capability of the supply). A single #4 wire in a bundle of 1 to 3 wires is only rated for 85 Amps. Under normal conditions there is clearly no problem with the current load in this return cable. - The individual cable lengths range from 31" to 50". I believe that the heaviest current draw under normal conditions in a fully loaded crate will be about 88 Amps. #4 AWG at room temperature is about 0.253 mill Ohm / ft. Thus the worst case cable drop should be under 93 mV counting the drop on both the feed and return lines. Is that cable drop in the range that you were expecting ? It sounds reasonable from the point of view of how many extra Watts of power the supply will need to provide. Summary of what I'm building: P.S. Crate Cable Type Length(s) Color Terminal Terminal -------------- --------- ----- ---------- ---------- +5V Analog 39" & 50" Red LCA4-14H-L LCA4-10-L -5V Analog 36" & 42" White LCA4-14H-L LCA4-10-L Return Analog 55" Black LCA4-14H-L LCAN4-10-L -5.2V Digital 34" & 44" Yellow LCA4-14H-L LCA4-10-L Return Digital 31" & 37" Black LCA4-14H-L LCA4-10-L Jumper at the power supply end between the negative side of the +5V analog supply and the positive side of the -5V analog supply. This is a 1" wide 100 mils thick copper strap that goes over these 2 power supply output studs and has a bolt in the middle to connect to the common +-5V analog return wire that runs to the front of the crate ------------------------------------------------------------- Notes from Robert and Brenda about requested changes to the DC Power Cables From: Robert Date: Tue, 13 Nov 2012 12:04:21 -0500 Subj: DC supply cable length. Hello Dan after my last tripe to Mexico I think we should make the next set of cables longer.  The ones you made were long enough if they had been used in the right locations.   They had the short cables going to the longer runs.   We fixed that problem but lets not give them a choice next time.   I think the second longest black cable should be able to fit any where.  The one really long ground should stay the same length. Micheal had me build a new set of fans with these high volume fans he found.   Their almost three inches tall so if we use them on top the cable length will also have to be longer. From:  Brenda Sent:  Tuesday, November 20, 2012 12:21 PM  Subj:  monitoring LV voltage ...  He suggests that when Dan Edmunds makes more cables that he crimp in the sense wire with the cable, because there isn't much physical space to put the sense wire under the same screw as the fat cable. From: Robert Date: Tue, 20 Nov 2012 13:52:40 -0500 Subj: LV front-end crate DC supply cable length I would say make them all 50" except for the one 55" ground it should stay 55".  Anytime you want to make them I'll have Brenda mail them down or we'll carry them. ------------------------------------------------------------- Date: 26-Nov-2012 Sent a note to Andreas requesting a quote for a 2nd PL506 with 3 special options: space out the MEH modules, 2 line fuses, and a control input to disable all outputs. I also asked is it OK to cut the AC in an emergency shutdown. Received a reply on the 27th. ------------------------------------------------------------- Date: 29-Nov-2012 Made and shipped to LANL the second set of Low Voltage DC power cables for the front-end crates. Include in this set of cables the length changes that Robert requested on 20-Nov-2012, i.e. all cables 50" except Analog Return is 55", and include the "sense wires" that Brenda requested on 20-Nov-2012. Thus second set of cables is: P.S. Crate Cable Type Length(s) Color Terminal Terminal -------------- --------- ----- ---------- ---------- +5V Analog 50" & 50" Red LCA4-14H-L LCA4-10-L -5V Analog 50" & 50" White LCA4-14H-L LCA4-10-L Return Analog 55" Black LCA4-14H-L LCAN4-10-L -5.2V Digital 50" & 50" White LCA4-14H-L LCA4-10-L Return Digital 50" & 50" Black LCA4-14H-L LCA4-10-L As with the first set, all 9 of these cables have labels and double heat-shrink over the lug barrel at both ends. I put a "sense" wire into the crate end lug on one cable of each of the 5 types. I also made and shipped a second jumper to connect the negative side of the +5V analog supply to the positive side of the -5V analog supply at the supply end. The dimensions remained the same as the first of these jumpers, i.e. 1" wide 100 mils thick copper strap 1.850" long with 1/4" diameter holes in the center at: 0.300", 0.925", and 1.550". The two end holes (for the power supply studs) are double drilled with an end mill, the second drill is 5 mils outward to bring their center to center spacing up to 32.0mm vs 1.250". Include a 1/4-20 steel bolt nut and washers for the center hole for the Analog-Return cable. ------------------------------------------------------------- Date: 19-Apr-2013 As requested I shipped all of the remaining AWG #4 wire and all of the remaining Panduit lugs and my Panduit crimpers and Greenlee wire cutter to Robert/Brenda at Los Alamos. There is enough wire and lugs to make 3 more LV cable sets. I also made an shipped a completed LV cable set and 4 of the machined copper straps for the Analog Return connection to the supplies. Package 1, 15 lbs, my crimp tool and cutter for making DC cables, 3 types of Panduit lugs for the HAWC LV cables. Package 2, 38 lbs, black, red, and white AWG #4 wire - enough for at least 3 more LV cable sets. Package 3, 11 lbs, a completed LV cable set and 4 of the machined copper straps for the analog supply common connection. As requested this new set of LV cables was the same design as the set that was shipped at the end of November 2012. Shipped UPS with Tracking Number: 1Z4589450346427992 I received a note from Andy Smith that Wiener would ship the next LV supply on April 29th. This latest set of LV cables and material will be at Los Alamos before then.