Attachment with Questions and Answers.docx

Question 1 : Relay Panel, Drawings E-570, E-571, Please confirm quantity. Answer: 4 Question 2: Relay Panel, Drawings E-570, E-571, Please confirm quantities and Relay part numbers. SEL does not offer SEL-3555 in 1RU configuration, only with 3RU. Answer: Furnish (2) SEL 3555 RTAC's in size offered by manufacture.

Question 3: Relay Panel, Drawings E-570, E-571, E-122, SEL-3555 connections:

Is there a reason for two (2) SEL-3555 RTACs being requested? Does the end user require redundancy? Why are the 17 serial ports for each RTAC being requested?

The comm architecture only shows serial connections to the RTACs from some of the 787 relays and Annunciators. Are these direct connections required if the same relays are connected to the 2731 switches? Are the 3555 RTACs intended for central data concentration only? Answer: See revised network drawing, E-122, for requirements.

Question 4: MV SWGR, there is an adjective "pulsed" used across different documents for feeders and buses. Does the adjetive "Pulsed" in terminology "pulsed feeders", "Pulsed Bus" or "Pulsed Power" imply any specific functionality or requirement? Switchgear will meet IEEE C37.20.2 and will be UL labeled but no specific design for pulsed functionality is applicable for Metal-clad Switchgear. Answer: Does the adjetive "Pulsed" in terminology "pulsed feeders", "Pulsed Bus" or "Pulsed Power" imply any specific functionality or requirement?

Switchgear will meet IEEE C37.20.2 and will be UL labeled but no specific design for pulsed functionality is applicable for Metal-clad Switchgear.

Question 5: MV SWGR, please confirm CTs ratio for mains and Ties, Answer: Provide 400 5 CC400 CT’s Question 6: MV SWGR, Please confirm CTs ratio for feeders on load side. Answer: Provide 4000:5 C400 CT's on the load side and Provide 1200:5 MR C400 CT's on the line side of the feeder breakers.

Question 7; MV SWGR Please clarify on this requirement for the MV SWGR. Answer: The engineering certification is applicable to the PDC design and integration, not the equipment subject to manufacturing standards.

Question 8: PDC, Drawing E-7, DC bus tie switch--Is this backfed through breakers in each panel? Specification Attachment #8: lists Two (2) Battery Disconnect Switches, and one (1) DC Bus Tie Disconnect Switch. Drawing E-500. PPDB FLOOR PLAN: shows those disconnects as well as two (2) Battery Fuse enclosures. Drawing E-4. 13.8kV & 480V SINGLE LINE: shows the Two (2) Battery Disconnect Switches and two (2) Battery Fuses but does not show one (1) DC Bus Tie Disconnect Switch. 1. Please provide a Single Line Diagram that includes the DC Bus Tie Disconnect Switch or explanation of its application. 2. Is it acceptable to combine the Battery Disconnect Switches and Battery Fuses into Fused Disconnect Switches? 3. Drawing PPDB FLOOR PLAN (E-500) does not show the rating of the Battery Disconnect Switches and Battery Fuses but does show #2/0 wire to them. Are 200A disconnect switches with 175A fuses acceptable? Answer: The DC bus tie is a connection between branch circuit breakers in each panelboard. 1. "Bus Tie" disconnect switch is not required. Branch circuit breakers from interconnected panels serve the purpose. See drawing E-4 2. No. The positive and negative leads of the batteries should be separated and routed independantly prior to overcurrent protection device.3. Yes.

Question 9: PDC, please confirm all paint colors. Attachment (Sheet Note G) calls for 4 custom colors, Sandstone on exterior walls. Spec (2.13.3) calls for Twilight Blue on exterior wall. Answer: For the building exterior we want to go with traditional FNAL blue. Please use the Federal paint standard color: SAE AMS-STD-15056 Queston 10: PDC, Need specs/drawing for FNAL Fiber Optic Interface Cab. Answer: Corning Closet Connector Housing (CCH) Question 11: PDC, Transformer monitoring racks shown on layout are not in equipment list or in the relay or mimic panel specs. Need specs/drawings. Answer: Provide 19" equipment racks for use by others. Include (2)125 VDC and (2)120 VAC circuits. Equipment racks to match adjacent racks.

Question 12: PDC, Is the PDC base structure supporting all the cable tray/light, conduit in the vault? Answer: Yes Question 13: PDC, Structural drawings state compliance with IBC 2021, spec says IBC, 2009 and 2021. Current adopted year for Illinois is 2018. If IBC 2021 is chosen, PDC size may increase. Answer: ICB 2021 is required.

Question 14: PDC, Is A40 galvanneal acceptable deviation from G90 galvanized for sheet steel applications? Answer: Details to follow – will be included in next amendment.

Question 15: PDC, For warranty purposes, Assuming delivery by Sept 2027. What is the estimated service date from the PDC factory FAT (including storage)? Answer: The latest operational date of the substation is January 1, 2030.

Question 16: PDC, What is needed for security and door hardware? Who is providing door hardware? Are general conduit provisions acceptable? Answer: PDC vendor to prep doors with conduit and boxes for FFDG installed swipe card system.

Question 17: PDC, Is a Dielectric coating system needed on floor? Will dielectric rubber mats be an acceptable alternate? Answer: No Question 18: PDC, Please confirm level of HVAC redundancy. Description following is describing N+1. Answer: Provide 10 units total per spec 2.14.1 Question 19: PDC, Who is providing the TAB services for onsite HVAC startup? Answer: The TAB services are included in the onsite installation scope of this project and vendor. Fermilab will have a separate independent Commissioning Agent oversee the work.

Question 20: PDC, Who is providing the HVAC BAS graphics and integration into the site BAS system? Answer: The HVAC BAS graphics services are included in the on site installation of the building scope of this project and vendor.

Question 21: PDC, Confirm how many termination points are going to each Marshalling cabinet. Which terminals go to which marshalling cabinet? Answer: See drawings E-337 thru E-339 for wiring in marshalling cabinets MC#1, MC#2 and MC#3.

Question 22: PDC, What is necessary to communicate with the "Firus System"? Answer: The firus system is a life safety grade alarm system that is on a site wide fiber optic communication loop. The alarm points are dry contact inputs.

Question 23: PDC, Fire System Questions: A. Are there any specific requirements needed from the AHJ/Fermilab Fire Department? B. What are requirements for the onsite fire system inspection? What part should be testing at the FAT at PDC manufacturer? C. Is this system going to support a Voice Evacuation System? D. What specific Siemens Cerberus Fire Alarm System is installed on site? Answer: A. All life safety system installed per plans, specifications and code requirements. B. The fire system will be inspected for compliance with project requirements at FAT and on site acceptance testing. C. The system components are listed in the specifications section 2.20. D. Details to follow in the next amendment.

Question 24: BMS System If relevant please provide drawing/manuals referenced in attachment #8. Not provided Answer: Please provide more detailed document reference to your RFI to better understand the question.

Question 25: Relay Panel, Who is responsible for the automation and Integration for the related equipment in the PDC? Answer: The following specification describes the services included in this scope: 3.3.2.4 SEL factory system integration shall be provided for the SCADA system and HMI interface.

PF-18 Rev2 June 2022