DESIGN STANDARDS ELECTRICAL SCHEMATIC …

1 LHC Project Document rev or Supplier/Contractor Document Document : 2000-07-05theLargeHadronColliderprojectC ERNCH-1211 Geneva 23 SwitzerlandQuality Assurance StandardDESIGN STANDARDSELECTRICAL SCHEMATIC DIAGRAMSA bstractThis document provides STANDARDS for all ELECTRICAL SCHEMATIC diagrams for the LHC andits detectors. It covers:! High and low voltage distribution diagrams.! Relay and automatism diagrams.! Lighting, power and earth protection diagrams.! LHC main ring magnets cabling diagrams.! Cooling and ventilation relay and automatism by :Martial by :LHC Quality AssuranceWorking GroupApproved by :Paul FaugerasDeputy to LHC ProjectLeader for QualityAssuranceLHC Project Document rev 2 of 14 History of ChangesRev.

2 Of draft submitted to QAWG for comments2nd draft submitted to QAWG for commentsReferences corrected. Released following QAWG Project Document rev 3 of 14 Table of .. PREPARATION - GENERAL .. SIZES .. BLOCK .. LIST .. SCHEMES .. PRODUCED BY PRODUCED BY ST/CV .. ELECTRICAL ELECTRICAL DIAGRAMS .. AND LOW VOLTAGE DISTRIBUTION UNIFILAR DIAGRAMS .. NAMING AND AUTOMATISM DIAGRAMS .. NAMING 810. LIGHTING, POWER AND EARTH PROTECTION DIAGRAMS .. FILE NAMING 911. LHC MAIN RING MAGNETS CABLING 912. COOLING AND VENTILATION RELAY AND AUTOMATISM DIAGRAMS .. FILE NAMING RELATED 1014. ANNEXES .. 10 LHC Project Document rev 4 of 141.

3 PURPOSETo provide STANDARDS for all ELECTRICAL SCHEMATIC diagrams for the Large HadronCollider (LHC) and its POLICYAll ELECTRICAL SCHEMATIC diagrams for the LHC project shall be created with a ComputerAided DESIGN (CAD) system, in accordance with the general quality assurance policy ofthe LHC CAD systems used for ELECTRICAL SCHEMATIC diagrams prepared at CERN areAutoCAD1, the AutoCAD add-on application Alpage-Elec2, and SEE ELECTRICAL SCHEMATIC diagrams prepared at CERN, and referenced in a CERN contractual document, shall incorporate the appropriate CERN title block. The drawingtittle shall be written in English only or English and ELECTRICAL schematics diagrams shall be stored in the CERN Drawing Directory(CDD) with the relevant descriptive information and identified by a unique drawingnumber defined in accordance with the CERN Drawing Directory rules as described inthe CDD Manual [ 1 ].

4 Diagrams may be stored as Hewlett Packard Graphic Language(HPGL) plot files and native CAD files or as HPGL plot files ELECTRICAL SCHEMATIC diagrams shall be submitted to a review and approval processbefore being released as described in "Drawing Management and Control", [ 2 ].New versions of released diagrams shall be submitted to the same review andapproval process as the original SCOPEThis standard is applicable to:All ELECTRICAL SCHEMATIC diagrams for the LHC and its detectors. This includes:! High and low voltage distribution SCHEMATIC diagrams.! Relay, wiring and automatism SCHEMATIC diagrams.! Lighting, power and earth protection SCHEMATIC diagrams.! LHC main ring magnets cabling SCHEMATIC diagrams.

5 ! Cooling and ventilation relay and automatism RESPONSIBILITIESM anagers, Supervisors and Project Engineers (PE) at CERN working on the LHC Projectare responsible for:! Ensuring that designers and draughtsman are aware of and understand theprocedures described in the present document.! Ensuring that these DESIGN STANDARDS are fully implemented in their DESIGN . 1 AutoCAD is a registered trademark of Autodesk, Alpage-Elec and SEE 3000 are registered trademarks of Ige-XaoLHC Project Document rev 5 of 14! Ensuring that industrial support personnel assigned to CAD DESIGN and draftingactivity is suitably trained and has been informed of CERN practices before designer and draughtsman is responsible for producing diagrams in compliancewith these DESIGN ST Division is responsible for the definition of equipment codes used for electricalschematic diagrams.

6 Equipment codes for LHC equipment have to be approved by theLHC Co-ordinator for equipment codes [ 3 ].The diagrams in the categories below are produced under the responsibility of the STDivision ELECTRICAL Engineering and Telecom group (ST/EL).! High and low voltage distribution SCHEMATIC diagrams.! Relay, wiring and automatism SCHEMATIC diagrams.! Lighting, power and earth protection SCHEMATIC diagrams.! LHC main ring magnets cabling SCHEMATIC and ventilation relay and automatism diagrams are produced under theresponsibility of the ST Division Cooling and Ventilation group (ST/CV).5. DRAWING PREPARATION - DRAWING SIZESU nless otherwise specified all diagrams shall be made on one of the followingInternational Organization for Standardization (ISO) standard sizes.

7 Horizontal A0 (1189 x 841 mm)A1 (841 x 594 mm)A2 (594 x 420 mm)A3 (420 x 297 mm)VerticalA4 (297 x 210 mm) TITLE BLOCKT itle blocks differ slightly depending on the CAD application used for preparing thediagram, but they are in all cases compatible with The diagram s title in English or in English and FrenchDRAWING NUMBERAs described in chapter CATEGORYThe code of the quality assurance category (1 char), see [ 4 ]DRAWING SIZEThe 2nd digit of the size (3 for size A3)REVISION INDEXThe 2nd letter of the revision indexAUTHORThe author s initial and surnameDATEThe date of creation of the drawing in ISO format (yyyy-mm-dd)SCALEUsed only for lighting, power and earth protection diagramsLHC Project Document rev 6 of 14 Figure 1 - Title block of a lighting diagram Figure 2 - Title block of a single line MODIFICATION LISTA new line has to be added to the modification list of diagrams for each revision, withthe following data:INDEXThe 2nd letter of the revision of the modificationNAMEI nitial and surname of the author of the modificationZONEThe location of the modification (1 char + 1 digit)MODIFICATIONThe Engineering Change Request (ECR) number of the modificationor a text describing the modification(s)Figure 3 - Diagram modification list6.

8 NUMBERING SCHEMESThe numbering scheme for ELECTRICAL SCHEMATIC diagrams is derived from the schemein use for LHC drawings. However deviations are introduced to take into account thespecific needs related to ELECTRICAL Project Document rev 7 of DIAGRAMS PRODUCED BY ST/ELA deviation is introduced in the use of the sequential number which is 3 digits longinstead of 4. The digit freed in this way is used for a geographical location code. Thestructure of the drawing number is:Project code: A project identification code. For the LHC project the code is LHCE quipment code: An LHC equipment code (5 chars/digits). See annex geographical location code (1 digit)Number: A sequential number (3 digits).

9 Example:PROJECT CODEEQUIPMENT CODEZONENUMBERLHCEBL__5014 Note: Equipment codes shorter than 5 chars/digits shall be completed withunderscores (_). DIAGRAMS PRODUCED BY ST/CVThe position normally used for the equipment code is replaced by a 1 charactersystem code followed by a 4 digit building number. The structure of the drawingnumber is:Project code: A project identification code. For the LHC project the code is LHCSys:An LHC system identification code. E for ELECTRICAL building number (4 digits).Number: A sequential number (4 digits).Example:PROJECT CODESYSBUILDINGNUMBERLHCE268400017. ARCHIVING PROCESSE lectrical diagrams are archived in CDD as HPGL plot files.

10 The process is describedbelow. Native CAD files of ST/CV diagrams are also stored in ST/EL ELECTRICAL DIAGRAMSA plot file in HPGL2 format is prepared and placed in a sub-directory of the directorySRV4_DIV\drawings\DRAWINGS\ELEC \HPGL\.This sub-directory, and the plot file it contains, are named in accordance with thefollowing convention:Sub-directory nameDOPRJFile :LHC Project Document rev 8 of 14 DOPRJ:A DESIGN office code (2 digits) concatenated with a project code (3chars)EQUIP:The equipment code (5 chars/digits)ZONE:The geographical location code (1 digit)3 NThe second to fourth digits of the diagram sequential number-3digitsExample:The plot file of the drawing LHCEBL___5004 is named and stored in thesub-directory SRV4_DIV\drawings\DRAWINGS\ELEC\HPGL\77 LHC\.