CERN EL Group Summary

J Devine

S Infante

Summary

• Structure of EN-EL group at CERN

• Structure of the CERN electrical network

• Operating & installation restrictions

• Principal items of equipment we use

• Some more ‘exotic’ items…

Organisation Chart

Main Activities

• Control Cabling & Optical Fibers

• Computing and Documentation

• Control• High Voltage• Low Voltage• Network Operations

CERN Electrical Network

• HV/MV: 400kV, 66kV, 18kV, 3.3kV distribution• LV: 230/400V 50Hz throughout• DC: 48V network for critical systems• Diesel generators for continuity and life safety• Variety of equipment of all types and ages

High Voltage Section

• 400kV Supply from EDF• 132kV Supply from SIG• 66kV Distribution for LHC• 18kV Distribution for SPS/Admin• 3.3kV Distribution for Life Safety & Cryogenics• Over 100 Substations• Over 500Km of underground cables

Low Voltage Section

• Major Projects: New build and refurbishment• Minor Projects: According to user needs• Everything from transformers > lights & sockets• Majority of equipment is purchased through a

standing contract (3 year duration), including installation labour

• Special items (cables, connectors, things unique to CERN) purchased & supplied directly

Low Voltage Section

• Typical equipment we use:– LV Switchboard & distribution boards– Cables & Containment– Socket outlet strips– Lighting– UPS– 48V DC production equipment– Custom chassis, emergency stop, 48V

distribution

Control Section

• Supervision of CERN Electrical Network, from 400kV to 400V, via an industrial SCADA/DMS system (200,000 ana/dig data points)

• RTU’s, industrial computers acting as data concentrators, are installed in all main substations, surface and underground.

• Several thousands of electrical equipment, from transformers, to protection relays, to I/O units and switchboard measurement readers are monitored via different field bus and communication protocols

Control Section

IEC870-5-101/104

Control Section

• Permanent changes/upgrades of the whole control infrastructure follow the network renovation projects

• Main components are purchased through a standing Contract (RTU’s, DAU’s). End foreseen in 2013

• Data Engineering performed via the standing Contract or via a Software Support for Industrial Control interdepartmental Contract (3 year duration)

Control Section

• Several hundreds of PLC’s managing network switchover in case of outages or LV power distribution control. Programming is normally outsourced.

• Pilot project for IEC-61850 standard implementation for inter-tripping/interlocking signals within substation

Questions?

CERN EL Group SummarySummaryOrganisation ChartMain ActivitiesCERN Electrical NetworkHigh Voltage SectionSlide Number 7Low Voltage SectionLow Voltage SectionControl SectionControl SectionControl SectionControl SectionQuestions?