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19/05/15 Nano PLC Replacement 1
Contents:1. Current situation2. Requirements definition3. Current DSS solutions (Atlas/CMS)4. Outline Proposal5. Timescale for implementation
Presentation based on EDMS 1505921“AU Chain Distribution Boxes”
Nano PLC Replacement programme
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1. Current situation – Locations:
7 No. in East Hall – EBC26*EH(EP-T7), EBC27*EH(EP-T8), EBC28*EH(EP-T10), EBC29*EH(EP-T11 Cloud), EBC30*EH(EP-T9), EBC31*EH(EP-T7), EBC35*EH(EP-T9).2 No. in West Hall – EXC8*WH, EXC21*WH3 No. in AD Hall – EXC11*49(ASACUSA), EXC15*49(ATRAP), EXC18*493 No. in EHN1 – EXC404/HN1, EXC414/HN1(HNA903), EXC418/HN1(HNA903)
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1. Current situation – Functions:
AUL chain activation,Temperature alarm (2 thresholds),Fire detection interlock,Gas Detection interlock,Loss of power (220V),External AUL input,External Gas input,External AUL secondary input,External Gas secondary input,Power trip,Air conditioning loss of power.
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1. Current situation – Motivations for change:
Schneider NANO PLC completely obsolete. EL control of CV equipment.EL control of GS/ASE equipment (fire/gas).Use of PLC requires pro-active management.Current system overly complex.
Time for a new, simpler, solution…
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2. Requirements definition
From IS5:AUL Purpose:AUL - specific features: cut off power sources situated inside or serving a geographically circumscribed position or installation.Areas to be equipped:AULs must be installed in restricted premises or areas that are clearly demarcated such as workshops, laboratories, barracks and similar areas and/or other types of plants with risks greater than those of ordinary domestic appliances or office equipment.
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2. Requirements definition
From IS5:All AUL actuators at a given point, or those of an AUG in a building or hall must have the same effect.
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2. Requirements definition
Major event 2012 – ALPHA experiment power cut due to Nano.
Additional user requirements, defined by EN/MEF with HSE, GS/ASE, EN/EL and EN-DSO for Secondary Beam Areas (SBA’s):• Covers each system, AUL, AUG, ODH,
Gas, Fire and Temperature.• Ability to cut electrical power to a
defined zone or zones upon the activation of either a manual switch or automatic interlock with another system, notably ATEX gas detection.
• Maximum granularity and flexibility for the selection of zones in which emergency electrical power cuts may be affected.
• A highly reliable system, fail safe and suitable for life safety applications.
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2. Requirements definition
EN/EL requirements:
• Compatibility with new philosophy using contactors as a replacement for MN coils to reduce the call out requirements for the EN/EL piquet service.
• A cost effective system which can be maintained without major intervention, replacement or upgrade for a significant period of at least 25 years.
• Enhanced indication of the location of AUL chain trip events (manual or interlock) to facilitate interventions.
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2. Requirements definition
Summary:
• A simple, reliable and modular system.• Suitable for various topologies of experiments and
physics barracks.• External input from Gas Detection only.• Indication of activation for faster Piquet intervention.• Can be reset by deliberate user action.
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3. Current DSS solutions (Atlas/CMS)
“Twido” BoxCircuit breakers
Electrical power supply
End user rack
Electrical monitoring
(SCADA)
Experimental Monitoring DCS
Experimental Control
(DSS/DCS)
Rack
• Experimental control of circuit breaker state• “AUE” for rack• Local feedback from rack (fans/temperature)• Control signals from experiment (on/off) from
either:• DSS• DCS• Both, in some cases
On/Off
Off
Status
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3. Current DSS solutions (Atlas/CMS)
“Twido” BoxCircuit breakers
Electrical power supply
End user rack
Electrical monitoring
(SCADA)
Experimental Monitoring DCS
Experimental Control
(DSS/DCS)
Rack
• Experimental control of circuit breaker state• “AUE” for rack• Local feedback from rack (fans/temperature)• Control signals from experiment (on/off) from
Input: 48V DC, low current consumption (15VA inrush, <1W consumption in operation). Supply derived from TGBT
Output: 48V DC latching signal, suitable for MN coils, or hold open contactor circuit – for future developments of distribution in SBA’s.
5. Timescale & Cost
Phase 1: Design and Prototype validation, May – July 2015Phase 2: Series Fabrication (50 units), July – September 2015Phase 3: Installation EHN1, September – December 2015Phase 4+: Installation in East and West areas, 2016+
5. Timescale & Cost
Cost estimate for 50 No., based on PIC chain campaign: