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INSTRUMENT SIGNAL EARTHING PHILOSOPHY

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INSTRUMENT SIGNAL EARTHING PHILOSOPHYCOVER SHEET

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,SHEET DESCRIPTION REMARKS SHEET DESCRIPTION REMARKS SHEET

~ NO. NO. NO.001 COVER SHEET - 039 079

w:r

080l 002 INDEX SHEET - 0405:> 003 NOTES & LEGENDS - 041 081

INSTRUMENTS/ JUNCTION BOXES/CABINETS IN EQUIPMENTSUBSTATION/ 042 082-0 004 - ' CONTROL ROOM 043 083

005 FF DEVICES IN EQUIPMENT ROOM/ SUBSTATION - 044 084

SOLENOID VALVE/BUILDINGF&G SYSTEM IN 045 085006 -

EQUIPMENT ROOM/ SUBSTATION 046 086

007 SOUNDER/BEACON/LOCALPANEL/EQUIPMENT ROOM/ CONTROL ROOM - 047 087008 INSTRUMENTS/JUNCTION BOXES/RTU/LOCALCONTROL PANEL/TRAY - 048 088

009 049 089

010 050 090

011 051 091

012 052 092

013 053 093

014 054 094

015 055 095

016 056 096

017 057 097

' 018'

058 0980

019 059 099I

~ 020 060 100'- 021 061 101

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GENERAL NOTES

1. RESISTANCE VALUE OF PLANT EARTH GRID SHALL BE LESS THAN 1 OHM.

2. WHENEVER MULTIPAIRCABLE IS CONNECTED BETWEEN 2 CABINETS, SCREEN OF THE CABLEHAS TO BE CONNECTED TO ONLY ONE CABINETS INSULATED CLEAN EARTH BAR.

3. SCREEN EARTH FORSERIAL COMMUNICATION CABLES BETWEEN SYSTEMSSHALL BE CONNECTEDAT ONE SIDE ONLY TO INSULATED CLEAN EARTH BAR.

4. CABLEGLAND ATINSTRUMENT ENCLOSURE, MARSHALLING CABINETS,SYSTEM CABINETS JUNCTIONBOX SHALLBE FITIED WITH EARTH TAG.GSW ARMOUR EARTHED VIA CABLE GLAND EARTH STUD.

5. ALL SCREEN DRAIN WIRES SHALL BE FITIED WITH GREEN INSULATED SLEEVE.

6. THE CLEAN EARTH SYSTEMSHALL MEET THECONTROLSYSTEM EARTHING AS REQUIRED BY ICSS VENDOR.7. FOR EQUIPMENT/CONTROLROOM SUBSTAnON EARTHING, CABLE INSTALLAnON TERMINATIONFROM EARTH GRID

TO EQUIPMENT/ CONTROL ROOM SUBSTATION EARTH BAR SHALL BE BY ELECTRICAL. FROM EQUIPMENT/CONTROLROOM SUBSTATIONEARTH BAR TO EARTHBARS INSIDE PANELS SHALL BE BY INSTRUMENTATION.

8. FOR FIELD EARTHING, CABLE INSTALLATION TERMINATION UPTOEARTH BAREARTHING GRIDTO EARTH BAR) SHALL BE BY ELECTRICAL. EARTHING CABLE INSTALLATIONAND TERMINATION FROM EARTHBAR TO FIELDJB/LOCAL PANEL SHALL BE BY INSTRUMENTATION.

9. SAFETYEARTH SYSTEMCABLESSHALLBE GREEN/YELLOWINSULATED.

10. CLEAN EARTH SYSTEMCABLESSHALL BE GREENINSULATED.

11 . THE BARSSHALL BE RINGCONNECTEDTO THE BARS IN OTHER CABINETSIN THE GROUPUSING CONDUCTORS25MM2 AND M12 BOLT.

12. THE INDIVIDUAL SCREENS(S) AND OVERALL SCREENS (OS) SHALL BE INDIVIDUALLYTERMINATED IN EACHBAR TERMINAL STRIP.

13 . STANCHIONS MOUNTED ON STEEL STRUCTURE DO NOT REQUIRE EXTERNAL EARTHING.

14. BOLTS NUTS SHALL BE BRASS, SUPPORTED BY SPRING WASHER SECUREDAGAINST LOOSENING. ALL BOLTED CONNECTIONS SHALLBE PROTECTED AGAINST CORROSION BY WRAPPINGWITHGREASE IMPREGNATED TAPE.

15. ALL LOCAL PANELS SHALLBE MADE ELECTRICALLY CONTINUOUSTO SAFETY EARTH WHICH SHALLINCLUDE ITEMS SUCH AS METAL DOORS, INTERNAL INSTRUMENT CASINGSETC.

16. THE EARTH POINTS OFALL INSTRUMENTS,JUNCTION BOXES, FIELD PANELS AND OTHERINSTRUMENT

UNITS SHALL BE CONNECTED TO THE AREA EARTH POINT ON A RING MAINBASIS USING GREEN/YELLOW OVERSHEATHEDCOPPER CONDUCTORS.

17. FLEXIBLE BONDING STRAPS ACROSSRACK SPLICES ARE ONLY REQUIRED IFA NON-METALICCOATING ISAPPLIED TO THE RACK SURFACE. WHERE LADDER IS GALVANISED THE BONDING STRAP MAY BEOMITIED.

18. EACH ENDOF THE CABLERACK SYSTEMSHALLBE CONNECTEDTO MAIN EARTHING NETWORKINDIVIDUALCABLE RACK SECTIONS SHALL BE BONDED TOGETHER AT COUPLING POINTS.

19. WHEN CABLERACK SYSTEM IS NOTCONTINUOUS DUETO PENETRATION OF\VALLSCONSTRUCTIONETC. THE CABLERACK EITHERSIDE OF THE BREAK MUSTBE BONDED TOGETHER.

20. FOR FIELD INSTRUMENT, EARTHING CABLE(2.5mm2) WILL BE CONNECTED NEARTO BRANCH CABLETRAY.

21 . EARTHING DETAILS INSIDE MARSHALLING CABINETS AND SYSTEM CABINETS WILL BE UPDATED BASEDONRECOMMENDATION FROM CONTROL SYSTEM VENDOR.

22 . DELETED.

23 . OVERALL SCREEN SHALL BE CUTOFF AND INSULATEDWITH TAPE TO ACHIEVE SINGLE POINT CONNECTION.

24. FURTHER DETAILS SAME AS ANALOG DEVICE(IS).

25 . STRUCTURE MOUNTED LOCALCONTROL PANEL (LCP) JUNCTION BOX SHALL BE CONNECTED TO NEAREST SAFE1Y EARTH BUS

WITH 6MM2

PVC SHEATHED (GREEN/YELLOW)COPPER CONDUCTOR.

,,.

LEGEND

ELECTRICAL CONDUCTORS

SCREEN DRAIN WIRE

CABLE ARMOUR

PLANT EARTH GRID

PVC SHEATHED EARTH CABLE

$ ------{ 0 SYSTEM CABLE

SAFETY EARTH BAR

~ m ] CLEAN EARTH BAR

ABBREVIATIONS

BLK : BLACK

BLU : BLUE

CE : CLEAN EARTH

ESD : EMERGENCY SHUTDOWN SYSTEM

GSW : GALVANISED STEEL WIRE

FF : FOUNDATION FIELDBUS

F&G : FIRE AND GAS

IS : INTRINSIC SAFETY

ICSS : INTEGRATED CONTROL SAFETY SYSTEM

JB : JUNCTION BOX

MAC : MANUAL CALL POINT

MICS : MINERAL INSULATED COPPER SHEATHED

MDV : MOTOROPERATED VALVE

NIS : NON-INTRINSIC SAFETY

OS : OVERALL SCREEN

PCS : PROCESS CONTROL SYSTEM

RED : RED

RTD : RESISTANCE TEMPERATURE DETECTOR

RTU : REMOTE TERMINAL UNIT

s : INDIVIDUAL SCREEN

SCN : SCREEN TERMINAL

SE : SAFETY EARTH

sov : SOLENOID VALVE

1YP : 1YPICAL

TB : TERMINAL BLOCK

WHT : WHITE

ov : ZERO VOLT

~ ~ ~ ~ ~ ~ ~ ~ ;

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BY E L E C T R ICA L ~P c P - - BY ELECTRICAL~15 TAPED & ISOLATED NOTE-4 NOTE-4 - · - · · - - · - · - -Ei ~ PLANT EARTHGRID (< OHM) ~ PLANTEARTHGRID (< OHM)0 r u . ~ ~ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ~ - - - - - - - - - - - - - - - - - - - - ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ - - - - - - - - ~ ~ ~ ~ ~ ~ ~ ~

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PROGRAM PHASE -1 {60 MBOPD)1505o9o1-:0oo-oo-lc-PHL-Ooo1I "'""oo1 ' oos ·;; ;Us

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REMOTE TERMINAL UNIT

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(NOTE- 20)

mm PVC SHEATHEDCOPPER CONDUCTOR

TO NEARESTSAFETY EARTH BUS

INSTRUMENT STANCHIONS(NOTE-13)

1111111

LOCAL CONTROLPANEL

LOCAL CONTROL PANEL(NOTE 25)

(NOTE 16)

TO NEAREST SAFETYEARTH BUS.

mm PVC SHEATHEDCOPPER CONDUCTOR

FLOWMETER (ULTRASONIC/VORTEX/CORIOLIS)

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JUNCTION BOX

1 PAIR/2 CORE/1 TRIADCABLE ENTRY (TYP.)

6mm2

PVC SHEATHEDCOPPER CONDUCTOR

TO NEAREST SAFETY EARTH BUS.

(NOTE 25) PVC SHROUD,(TYP.)

(NOTE 16)

2.5mm2


6mm 2 PVC SHEATHED (GREEN/YELLOW)COPPER CONDUCTOR (TYP.)

JUNCTION BOX(NOTE-4 25)

EARTHBONDING FLEXIBLE ..,.IL: ..._JUMPER THROUGH

35mm 2PVC SHEATHED

COPPER CONDUCTOR J o;;L EARTHING BOLT (BOLT HEAD INSIDE TRAY)NUT WASHERS OUTSIDE TRAY (TYP.)

(NOTE 14)(NOTE 17)

EARTHING BOLT (BOLT HEAD INSIDE TRAY)NUT WASHERS OUTSIDE TRAY (TYP.)

(NOTE 14)

35mm 2PVC SHEATHED

COPPER CONDUCTOR


(NOTE-18)

CABLE TRAY BONDING JUMPER(NOTE-19)


DOCUMENT T T L E :·

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COmAACTORD OC J

15050901 000 00 IC PHL 0001 008 008 NTS

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15050901-000-00-IC-PHL-0001_0