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LHC Project Document No.
LHC-PM-QA-403.00 rev 1.0
CERN Div./Group or Supplier/Contractor Document No.
EDMS Document No.
103568
Date: 2000-07-05
the
LargeHadron
Collider
projectCERN
CH-1211 Geneva 23Switzerland
Quality Assurance Standard
DESIGN STANDARDS
ELECTRICAL SCHEMATIC DIAGRAMS
Abstract
This document provides standards for all electrical schematic diagrams for the LHC and its 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 diagrams.
Prepared by :Martial Dujardin
ST/EL
Martial.Dujardin@cern.ch
Joaquin Inigo-Golfin
ST/CV
Joaquin.Inigo-Golfin@cern.ch
Checked by :
LHC Quality Assurance
Working Group
Approved by :
Paul Faugeras
Deputy to LHC Project
Leader for Quality
Assurance
LHC Project Document No.
LHC-PM-QA-403.00 rev 1.0
Page 2 of 14
History of Changes
Rev. No. Date Pages Description of Changes
0.1 draft
0.2 draft
1.02000-05-15
2000-05-24
2000-07-05 101st draft submitted to QAWG for comments
2nd draft submitted to QAWG for comments
References corrected. Released following QAWG meeting.
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Table of Contents
1. PURPOSE ............................................................................................. 4
2. POLICY ................................................................................................ 4
3. SCOPE.................................................................................................. 4
4. RESPONSIBILITIES.............................................................................. 4
5. DRAWING PREPARATION - GENERAL.................................................... 5
5.1 DRAWING SIZES .................................................................................. 5
5.2 TITLE BLOCK ....................................................................................... 5
5.3 MODIFICATION LIST ............................................................................. 6
6. NUMBERING SCHEMES ......................................................................... 6
6.1 DIAGRAMS PRODUCED BY ST/EL............................................................. 7
6.2 DIAGRAMS PRODUCED BY ST/CV ............................................................ 7
7. ARCHIVING PROCESS........................................................................... 7
7.1 ST/EL ELECTRICAL DIAGRAMS................................................................ 7
7.2 ST/CV ELECTRICAL DIAGRAMS ............................................................... 8
8. HIGH AND LOW VOLTAGE DISTRIBUTION UNIFILAR DIAGRAMS ........... 8
8.1 FILE NAMING CONVENTION.................................................................... 8
9. RELAY AND AUTOMATISM DIAGRAMS................................................... 8
9.1 FILE NAMING CONVENTION.................................................................... 8
10. LIGHTING, POWER AND EARTH PROTECTION DIAGRAMS ...................... 9
10.1 FILE NAMING CONVENTION.................................................................... 9
11. LHC MAIN RING MAGNETS CABLING DIAGRAMS.................................... 9
12. COOLING AND VENTILATION RELAY AND AUTOMATISM DIAGRAMS .... 10
12.1 FILE NAMING CONVENTION...................................................................10
13. RELATED DOCUMENTATION................................................................ 10
14. ANNEXES ........................................................................................... 10
LHC Project Document No.
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1. PURPOSE
To provide standards for all electrical schematic diagrams for the Large Hadron
Collider (LHC) and its detectors.
2. POLICY
All electrical schematic diagrams for the LHC project shall be created with a Computer Aided Design (CAD) system, in accordance with the general quality assurance policy of the LHC project. The CAD systems used for electrical schematic diagrams prepared at CERN are
AutoCAD
1 , the AutoCAD add-on application Alpage-Elec 2 , and SEE 3000 2 All electrical schematic diagrams prepared at CERN, and referenced in a CERN contractual document, shall incorporate the appropriate CERN title block. The drawing tittle shall be written in English only or English and French. All electrical schematics diagrams shall be stored in the CERN Drawing Directory (CDD) with the relevant descriptive information and identified by a unique drawing number defined in accordance with the CERN Drawing Directory rules as described in the "CDD Manual"[ 1 ]. Diagrams may be stored as Hewlett Packard Graphic Language (HPGL) plot files and native CAD files or as HPGL plot files only. All electrical schematic diagrams shall be submitted to a review and approval process before being released as described in "Drawing Management and Control", [ 2 ]. New versions of released diagrams shall be submitted to the same review and approval process as the original diagrams.
3. SCOPE
This 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. ! Cooling and ventilation relay and automatism diagrams.
4. RESPONSIBILITIES
Managers, Supervisors and Project Engineers (PE) at CERN working on the LHC Project are responsible for: ! Ensuring that designers and draughtsman are aware of and understand the procedures described in the present document. ! Ensuring that these design standards are fully implemented in their design. 1 AutoCAD is a registered trademark of Autodesk, Inc. 2 Alpage-Elec and SEE 3000 are registered trademarks of Ige-Xao
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! Ensuring that industrial support personnel assigned to CAD design and drafting activity is suitably trained and has been informed of CERN practices before starting work. Every designer and draughtsman is responsible for producing diagrams in compliance with these design standards. The ST Division is responsible for the definition of equipment codes used for electrical schematic diagrams. Equipment codes for LHC equipment have to be approved by the
LHC Co-ordinator for equipment codes [ 3 ].
The diagrams in the categories below are produced under the responsibility of the ST Division 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 diagrams. Cooling and ventilation relay and automatism diagrams are produced under the responsibility of the ST Division Cooling and Ventilation group (ST/CV).
5. DRAWING PREPARATION - GENERAL
5.1 DRAWING SIZES
Unless otherwise specified all diagrams shall be made on one of the following International Organization for Standardization (ISO) standard sizes:
Horizontal A0 (1189 x 841 mm)
A1 (841 x 594 mm)
A2 (594 x 420 mm)
A3 (420 x 297 mm)
Vertical A4 (297 x 210 mm)
5.2 TITLE BLOCK
Title blocks differ slightly depending on the CAD application used for preparing the diagram, but they are in all cases compatible with CDD. TITLE The diagram's title in English or in English and French
DRAWING NUMBER As described in chapter 6.
QA CATEGORY The code of the quality assurance category (1 char), see [ 4 ] DRAWING SIZE The 2nd digit of the size (3 for size A3) REVISION INDEX The 2nd letter of the revision index
AUTHOR The author's initial and surname
DATE The date of creation of the drawing in ISO format (yyyy-mm-dd) SCALE Used only for lighting, power and earth protection diagrams
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Figure 1 - Title block of a lighting diagram
Figure 2 - Title block of a single line diagram
5.3 MODIFICATION LIST
A new line has to be added to the modification list of diagrams for each revision, with the following data:
INDEX The 2nd letter of the revision index.
DATE Date of the modification
NAME Initial and surname of the author of the modification ZONE The location of the modification (1 char + 1 digit) MODIFICATION The Engineering Change Request (ECR) number of the modification or a text describing the modification(s)
Figure 3 - Diagram modification list
6. NUMBERING SCHEMES
The numbering scheme for electrical schematic diagrams is derived from the scheme in use for LHC drawings. However deviations are introduced to take into account the specific needs related to electrical diagrams.
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6.1 DIAGRAMS PRODUCED BY ST/EL
A deviation is introduced in the use of the sequential number which is 3 digits long instead of 4. The digit freed in this way is used for a geographical location code. The structure of the drawing number is: Project code: A project identification code. For the LHC project the code is LHC Equipment code: An LHC equipment code (5 chars/digits). See annex A1.
ZoneA geographical location code (1 digit)
Number: A sequential number (3 digits).
Example:
PROJECT CODE
EQUIPMENT CODE
ZONE
NUMBER
LHCEBL__5014
Note: Equipment codes shorter than 5 chars/digits shall be completed with underscores (_).
6.2 DIAGRAMS PRODUCED BY ST/CV
The position normally used for the equipment code is replaced by a 1 character system code followed by a 4 digit building number. The structure of the drawing number is: Project code: A project identification code. For the LHC project the code is LHC Sys: An LHC system identification code. E for electrical system.
BuildingA building number (4 digits).
Number: A sequential number (4 digits).
Example:
PROJECT CODE
SYS BUILDING NUMBER
LHCE26840001
7. ARCHIVING PROCESS
Electrical diagrams are archived in CDD as HPGL plot files. The process is describedquotesdbs_dbs20.pdfusesText_26
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