GROUNDING REQUIREMENTS FOR OUTDOOR ELECTRICAL SUBSTATIONS

Transcription

1 PURPOSE AND SCOPE 1. THIS DRAWING PROVIDES DESIGN PARAMETERS, APPLICATION AND ORDERING INFORMATION FOR GROUNDING OF EQUIPMENT, S, ETC. IN ELECTRICAL STATIONS INCLUDING TRANSMISSION AND DISTRIBUTION SUBSTATIONS AND SWITCHING STATIONS 2. GROUNDING OF NON-CURRENT CARRYING METALLIC PARTS AND S TO LIMIT POTENTIAL GRADIENTS DURING GROUND FAULT CONDITIONS FOR PROTECTION OF PERSONNEL IN THE AREA AND MAINTAIN EQUIPMENT INTERGRITY AND RELIABLITY.. GROUNDING OF NEUTRALS TO STABILIZE CIRCUIT POTENTIALS WITH RESPECT TO EARTH AND PROVIDE MEANS FOR CIRCUIT RELAYING TO CLEAR GROUND FAULTS.. GROUNDING FOR LIGHTNING AND SWITCHING SURGE PROTECTION. GROUND GRID SPECIFICATIONS --- ELECTRICAL SUBSTATION & TRANSMISSION SUBSTATION FACILITY NAME DISCIPLINE BUSINESS LINE FACILITY TYPE GROUNDING AND BONDING ACTIVE STANDARD SUBSTATION --- DRAWING TYPE STATUS PROJECT FACILITY COMPONENT UNIT 5. THE GROUND GRID SHALL BE BURIED 1-6" IMUM BELOW UNFINISHED GRADE IN THE AREA WITHIN THE SUBSTATION SECURITY FENCE AND TERATED NOT LESS THAN 8 FT FROM THE FENCE. THE FENCE SHALL BE GROUNDED SEPARATELY FROM THE GRID UNLESS OTHERWISE NOTED ON THE APPROPRIATE PROJECT DRAWING. FOR FENCE GROUNDING, SEE ES NEW STATION OR MAJOR STATION ADDITIONS WILL BE SPECIFICALLY ANALYZED TO DETERE THE APPROPRIATE GRID RESISTANCE AND GRID SPACING TO ASSURE PERSONNEL SAFETY.. THE GRID PERIMETER SHOULD ENCLOSE ALL ABOVE SURFACE GROUNDED METAL OBJECTS WITH AT LEAST FT (6 FT PREFERRED) OUTSIDE CLEARANCE SPACING. SEE APPLICATION "S",THIS DRAWING, FOR REQUIREMENTS FOR HIGH VOLTAGE TOWERS AND POLES INSIDE STATION FENCE. 8. PERIMETER GROUND RODS ARE TO BE SPACED AT 20-0 FT APART AND AT THE CORNERS OR AS DETERED BY GROUNDING ANALYSIS. INTERIOR GROUND RODS SPACED 50 FT APART AND AT SPECIAL LOCATIONS KCMIL MHD COPPER IS THE IMUM CONDUCTOR USED FOR GROUND GRIDS AND FOR CONNECTING S SUPPORTING HIGH VOLTAGE BUS AND EQUIPMENT TO THE GRID. USE 500 KCMIL MHD COPPER CABLE FOR FAULT DUTY ECEEDING 5KA. 10. NO BOLTED CONNECTION IS TO BE USED ABOVE OR BELOW GROUND OR FOR TERATING GRID CONDUCTORS. USE APPROVED EOTHERMIC OR APPROVED COMPRESSION CONNECTORS. NOTES 1. FOR MATERIAL USED FOR FENCE GROUNDING, SEE ES SOFT DRAWN COPPER MAY BE SUBSTITUTED FOR MHD BY EPC CONTRACTORS WITH ENGINEERING PERMISSION. THE AMPACITY OF 0% CONDUCTIVITY COPPERWELD #8 AND 19#8 CABLES ARE 10kA AND 25kA RESPECTIVELY. IF THESE CONDUCTORS ARE FOUND,THE MAIMUM SUBSTATION FAULT DUTY SHOULD BE VERIFIED TO BE LESS THAN THESE VALUES OTHERWISE, THEY SHOULD BE REPLACED.. GROUND RODS ARE STEEL WITH A COPPER CLADDING. USE THE PROPER TOOLS FOR DRIVING THE GROUND ROD. IT IS IMPORTANT THAT THE COPPER CLADDING NOT BE DAMAGED TO THE ETENT THAT THE STEEL IS EPOSED AS THIS WILL LEAD TO CORROSION AND EVENTUAL FAILURE OF THE GROUND ROD. REFERENCES: GROUNDING DESIGN STANDARD DRAWING MASTER LIST COPPER AND ALUUM POWER CONNECTORS ARRANGEMENT OF VOLTAGE TRANSFORMER (VT) AND COUPLING CAPACITOR VOLTAGE TRANSFOMER (CCVT). DRAWING NO. ES ES 0626 EDS DATE: /2/2015 CAD USER: SZO VECTOR: EDS RASTER: NONE CHANGED SHEETS 1,, 1, 15 STD SZO CHANGED SHEETS, 10, 12 & 15. STD DLG 1 DSG DWN CHKD SUPV APVD APVD DATE ADDED MATERIAL CODE FOR LYNCONITE SHEET 10 STD SZO GOD REVISION 1 R MILLENA R MILLENA M LY ISSUED FOR CONSTRUCTION SUBSTATION ENGINEERING STD RIM/MLJ REV DATE DESCRIPTION JOB NO DSG/DWN CHKD SUPV APVD PACIFIC GAS AND ELECTRIC COMPANY SAN FRANCISCO, CALIFORNIA B/M DWG LIST SUPSDS SUPSD BY MPL GOD GOD GD SHEET NO 1 OF 15SHEETS REV ETEC0 (8.511) SCAN IC

2 APPLICATIONS: (A). S: EACH ABOVE SURFACE GROUNDED METAL THAT SUPPORTS ENERGIZED BUS SHOULD HAVE A IMUM OF ONE CONNECTION TO THE GRID. MORE CONNECTIONS TO THE GRID ARE NEEDED IF: (1) THE BASE AREA DIMENSION IS GREATER THAN 5 FT SQUARE OR SUPPORT ACTIVE DEVICES: (SWITCHES, BREAKER, ETC.), THEN TWO GROUND COPPER CONNECTIONS SHALL BE MADE ON DIAGONALLY OPPOSITE CORNERS. (2) HAS FOUR OR MORE SEPARATE LEGS, SPACED 10FT OR MORE APART THEN EACH LEG OF MUST BE CONNECTED TO THE GROUND GRID. (B). AIR SWITCHES, CIRCUIT SWITCHERS: PROVIDE CONTINUOUS VISIBLE BONDING CONNECTION FROM OPERATING ROD(S) TO OPERATING PLATFORM. USE 250 KCMIL COPPER CABLE FOR BONDING. (SEE FIG THROUGH FIG, THIS DRAWING). (C). POWER TRANSFORMERS: FOR -PHASE TRANSFORMER NEUTRALS (H0, 0), USE ONE GROUND CONNECTION PER BUSHING. FOR -WIRE SYSTEMS NEUTRAL, SEE APPLICATION "E". FOR SINGLE AND -PHASE TRANSFORMER CASE GROUNDS, USE TWO GROUND CONNECTIONS PER TRANSFORMER PLACED ON DIAGONALLY OPPOSITE CORNERS FOR TANK GROUNDING. (D). NEUTRAL BUS FOR SINGLE PHASE EQUIPMENT: NEUTRALS FOR BANKS OF SINGLE-PHASE TRANSFORMERS OR REGULATORS SHALL BE MADE UP SEPARATELY FROM THE GROUND GRID - ON A NEUTRAL BUS MOUNTED ON INSULATORS - AND CONNECTED TO THE GRID ON ONE END WITH TWO GROUND CABLES. IN A MULTI-BANK INSTALLATION, NO MORE THAN TWO BANKS SHALL BE CONNECTED TO SAME NEUTRAL BUS AND THE CONNECTION TO THE GROUND GRID SHALL BE MADE AT A MID-POINT BETWEEN THE BANKS. ALL NEUTRAL BUSHINGS SHALL BE CONNECTED TO THE NEUTRAL BUS UNLESS OTHERWISE SPECIFIED ON ARRANGEMENT DRAWINGS, AND THE APPROPRIATE NOTE SO SPECIFIES. (E). FOUR WIRE DISTRIBUTION: USE TWO 250 KCMIL COPPER CABLES FROM TRANSFORMER LOW VOLTAGE NEUTRAL (0) TO GROUND GRID (SEE FIG 19, THIS DRAWING) AND FROM FEEDER TERATION TO GROUND GRID (SEE FIG 1, THIS DRAWING). THE TWO CABLES SHALL BE ROUTED IN SEPARATE TRENCHES TO DIFFERENT POINTS ON THE GROUND GRID. (F). POWER CIRCUIT BREAKER (PCB S), HIGH VOLTAGE CIRCUIT CIRCUIT BREAKERS (HVCB S) TWO GROUND CONNECTIONS FOR SKID MOUNTED PCB S OR PER TANK FOR NON-SKID MOUNTED BREAKERS. FRAME MOUNTED BREAKERS SHALL HAVE TWO GROUND CONNECTIONS TO STATION GRID. THE TWO CABLES SHALL BE PLACED ON DIAGONALLY OPPOSITE CORNERS. ONE #1/0 COPPER CONNECTION TO TERAL LUG OF HVCB AND MAKE CONNECTIONS TO THE THRU BOLT OF THE GROUND BUS ON THE BOTTOM OF THE CABINET. SEE FIG.11 THIS DRAWING. FOR BONDING OF BUSHING POTENTIAL DEVICES, SEE FIG. 29. (G). REGULATORS: THREE-PHASE REGULATORS SAME REQUIREMENTS AS OUTLINED IN APPLICATION "C", ECEPT FOR -PHASE STEP REGULATORS OPERATING AT VOLTAGES 2KV AND BELOW, WILL BE OPERATED WITH THE NEUTRAL UNGROUNDED. FOR SINGLE- PHASE REGULATORS, SEE APPLICATION "D" AND "E". FOR SINGLE PHASE REGULATOR CASE GROUND, SEE APPLICATION "C". (H). CARRIER COUPLING CAPACITORS AND COUPLING CAPACITOR VOLTAGE TRANSFORMERS (CCVT): TWO GROUND CONNECTIONS TO COMBINATION GROUND TERAL AND CASE GROUND. (SEE FIG 2 AND FIG 2, THIS DRAWING). REFER TO EDS FOR ADDITIONAL GROUNDING INFORMATION. (I). POTENTIAL DEVICES/ VOLTAGE TRANSFORMERS: ONE GROUND CONNECTION TO COMBINATION GROUND TERAL AND CASE GROUND. FOR OTHER VOLTAGE TRANSFORMER GROUNDING, (SEE FIG 25 AND FIG 26, THIS DRAWING). REFER TO EDS FOR ADDITIONAL GROUNDING INFORMATION. (J). POWER CAPACITORS, SHUNT CAPACITOR BANKS AND AIR CORE S: AIR CORE S AND CAPACITOR HOUSING OR SUPPORTING STEEL RACKS SHALL HAVE TWO GROUND CONNECTIONS TO THE GRID, (SEE. FIG 10, FIG 16 AND FIG 22, THIS DRAWING). PENINSULA GROUNDING SYSTEM IS REQUIRED FOR TRANSMISSION SHUNT CAPACITOR BANKS. FOR PENINSULA GROUNDING, THE GROUND CONDUCTORS ARE ELECTRICALLY CONNECTED TO THE MAIN STATION GROUND GRID AT ONLY ONE POINT AND TOTALLY ISOLATED FROM ALL FENCES, FENCE GROUNDS AND THE STATION GROUND GRID ECEPT AT ONE POINT OF INTERCONNECTION. USE TWO (2) 500 KCMIL COPPER CABLES FOR 60KV THROUGH 20KV AND THREE () 500 KCMIL COPPER CABLES FOR 500KV SYSTEMS TO INTERCONNECT TO THE STATION GRID AND ETEND THE CONDUCTORS INTO THE CAPACITOR GROUND GRID AREA. (SEE FIG 2, THIS DRAWING). EACH CAPACITOR STEP IS INDIVIDUALLY FENCED. THIS GUARD FENCE SHOULD BE SEPARATED FROM THE MAIN GROUNDING GRID AND ALL OTHER EQUIPMENT BY AT LEAST 10 FEET, AND MAY JOIN ADJACENT CAPACITOR GUARD FENCE OF ANOTHER STEP IN THE SAME CAPACITOR BANK GROUP. CAPACITOR GUARD FENCE SHALL NOT BE CONNECTED TO THE CAPACITOR GROUND GRID ECEPT TO IT S OWN GROUND RODS. CABLE PASSING UNDER CAPACITOR GUARD FENCE SHALL BE ISOLATED FROM FENCE BY PLACING CABLE IN 20 FEET LONG, 2" PVC PLASTIC CONDUIT. (SEE FIG 2, THIS DRAWING). (K). STEEL CONDUITS, JUNCTION BOES, CABLE TRAYS AND RECEPTACLES (OUTDOOR): MUST BE BONDED TO GROUND WITH ONE # AWG COPPER CABLE. (L). LOW VOLTAGE POTENTIAL TRANSFORMERS, STATION SERVICE TRANSFORMERS, DISTRIBUTION PANELS AND EQUIPMENT INDOORS: ONE# AWG COPPER CABLE CONNECTION TO GROUND. THE SIZE OF THE CABLE WOULD HAVE TO INCREASE IF THE FAULT DUTY AT THE DEVICE ECEEDS ITS RATING. FOR STATION SERVICE TRANSFORMERS NORMALLY SUPPLIED FROM TRANSMISSION TRANSFORMER BANK TERTIARY, THE IMUM GROUND CABLE IS 250 KCMIL CU SHEET 2 OF SHEETS 06910

3 (M). METER AND RELAY CABINETS (SCADA) ETC: ONE #1/0 COPPER CABLE CONNECTION TO MAIN GROUND GRID AND VIA THRU BOLT AND 1-HOLE TERAL CONNECTORS MAKE CONNECTIONS TO THE SIDE OF THE CABINET AND THE GROUND BUS INSIDE THE CABINET. (N). CONTROL BUILDING AND BATTERY ROOM: USE TWO 250 KCMIL COPPER CABLES FROM THE OPPOSITE CORNERS OF THE BUILDING TO THE MAIN SWITCHBOARD COPPER GROUND BUS BAR AND TIE TO SURROUNDING GROUND GRID. (SEE FIG 1, THIS DRAWING). ALL BUILDING S SHOULD BE LOCATED AT A IMUM OF 11 FT AWAY FROM STATION FENCE. FOR METALLIC BUILDING, (SEE APPLICATION "U", THIS DRAWING). FOR BATTERY ROOM GROUNDING REQUIREMENTS, REFER TO EDS 0181, "TYPICAL INSTALLATIONS OF BATTERIES AND RACKS". (O). LIGHTING STANDARDS: ALL LIGHTING STANDARDS SHOULD BE LOCATED INSIDE THE GROUND GRID PERIMETER. USE ONE #1/0 COPPER CABLE CONNECTION TO GROUND GRID. FOR ADDITIONAL INFORMATION, REFER TO EDS 5906, "LIGHTING FITURE ASSEMBLY & MOUNTING DETAILS". (P). FENCE GROUNDING: REFER TO ES "METHOD OF GROUNDING FENCES". (Q). PULL BOES: IT IS NOT NECESSARY TO GROUND CABLE SUPPORTS OR COVER PLATE SUPPORTS IN PULL BOES. REFER TO FIGURE 0 - DISTRIBUTION UNDERGROUND PRIMARY ENCLOSURE WITH METALLIC COVER. (R). LIGHTNING OR SURGE ARRESTERS: ARRESTERS MOUNTED ON TRANSFORMERS SHALL BE GROUNDED WITH ONE GROUND CONNECTION DIRECTLY TO GROUND ROD NEAR THE TRANSFORMERS AND THEN CONTINUING THE CABLE TO GROUND GRID. (SEE FIG 20, THIS DRAWING). FOR FREE STANDING ARRESTERS, (SEE FIG 21, THIS DRAWING). MAKE GROUND CONNECTIONS DIRECT TO THE GRID WITH THE LEAST AMOUNT OF SHARP BENDS. (S). HIGH VOLTAGE TOWERS AND POLES INSIDE STATION FENCE: I) IF INSIDE PERIMETER GROUND, TIE TO GROUND GRID, (SEE APPLICATION A). II) IF OUTSIDE PERIMETER GROUND, TOWER MUST BE LOCATED 8 FT AWAY FROM THE GRID AND 8 FT AWAY FROM THE FENCE AND GROUND PER TRANSMISSION LINE STANDARDS. III) IF OUTSIDE PERIMETER GROUND AND 8 FT CLEARANCE CANNOT BE MAINTAINED, CONTACT ENGINEERING FOR SPECIFIC GROUND GRID DESIGN. IV) GUYS SHALL BE LOCATED INSIDE THE FENCE. DO NOT GROUND ANCHOR GUYS. IMUM DISTANCE FROM GROUND WIRE TO GUY BOLT OR GUY WIRE IS 6". INSTALL TWO INSULATOR BOBS IN THE GUY WIRE 8 IMUM ABOVE GROUND AND 8 IMUM FROM POLE. (T). SYNCHRONOUS CONDENSERS, SERIES CAPACITORS AND STATIC VAR COMPENSATION EQUIPMENT: THESE EQUIPMENT WILL HAVE THEIR OWN INDIVIDUAL DESIGNED GROUNDING STANDARDS BASED UPON THE MANUFACTURERS RECOMMENDATIONS. (U). METALLIC BUILDINGS LOCATED OUTSIDE THE MAIN GROUND PERIMETER (NOT APPLICABLE TO CONTROL BUILDING AND BATTERY ROOM): INSTALL 250 KCMIL COPPER GROUND RING AROUND THE OUTSIDE OF THE BUILDING AND BOND TO THE BUILDING METAL STUDS AT OPPOSITE CORNERS WITH 250 KCMIL COPPER CABLE. THE GROUND RING SHOULD BE LOCATED FT AWAY FROM THE BUILDING. (SEE FIG 1, DETAIL-A, THIS DRAWING). (V). GROUND WELL: USE AS A MEANS TO LOWER OVERALL RESISTANCE (TO REMOTE EARTH) OF A GROUND GRID SYSTEM WHEN IT IS DIFFICULT TO LOWER THE RESISTANCE BY EPANDING THE GRID ALONG A HORIZONTAL PLANE AS INDICATED BY SPECIFIC GROUNDING ANALYSIS RECOMMENDATIONS. SEE FIGURE 28 THIS DRAWING. (W). EISTING GROUND GRID CONNECTIONS: CONNECTIONS FROM EISTING GROUND GRID TO NEW GROUND GRID CONDUCTORS SHOULD BE MADE WITH "HEAVY DUTY" EOTHERMIC MOLDS OR APPROVED COMPRESSION CONNECTORS AS SHOWN ON SHEETS (). HANDRAILS: METALLIC HANDRAILS, INCLUDING HANDRAILS ON STAIRWAY TO MPAC BUILDINGS, LOCATED INSIDE THE SUBSTATION GRID PERIMETER MUST BE GROUNDED. CONNECT EVERY OTHER HANDRAIL POST WITH ONE #1/0 COPPER CABLE TO THE MAIN GROUND GRID. (SEE FIG 1, DETAIL- B, THIS DRAWING) (Y). FIRE ALARM CONTROL PANEL AND FIRE SUPPRESSION SYSTEM: MUST BE BONDED TO SWITCHBOARD COPPER GROUND BUS OR 250 KCMIL COPPER CABLE WITHIN THE CABLE TRAY IN THE BUILDING WITH ONE # AWG COPPER CABLE SHEET OF SHEETS

4 SUBSTATION SECURITY FENCE GROUND ROD 11-0" 6-6" 8-0" -0" CONNECTION TO, ETC CONTROL BUILDING SEE APPLICATION "N" FOR ALL EQUIPMENT TYPE GROUNDING REQUIREMENTS, REFER TO APPLICATIONS (SH 2 &, THIS DRAWING) "PENINSULA" GROUND TAP "PENINSULA" SHUNT CAPACTOR GROUNDING (SEE APPLICATION "J" FOR ALL OTHER CONDITIONS) FOR DETAIL, SEE FIGURE 2 LOCATE ALL SUBSTATION EQUIPMENT INSIDE THIS GROUND GRID GROUND ROD SEE SPEC NOTE(8),, SH " THIS LOOP NEEDS TO BE INSTALLED UNLESS THE GATE IS CONSTRAINED TO SWING IN ONLY ONE DIRECTION. FIGURE 1 FENCE GROUNDING SEE APPLICATION "P" TYPICAL ARRANGEMENT OF GROUND GRID (SEE GROUND GRID SPECIFICATIONS, THIS DRAWING) BOND TO BLDG METAL STUDS AT OPPOSITE CORNERS WITH 250KCMIL COPPER CABLE GROUNDING LUG GROUNDING LUG PB 250 KCMIL COPPER -0" (TYP AROUND BUILDING) 250 KCMIL COPPER TO STATION GROUND GRID TO STATION GROUND GRID DETAIL-A DETAIL-B TYPICAL GROUNDING FOR METALLIC BUILDING OUTSIDE OF THE GRID TYPICAL GROUNDING FOR METALLIC HANDRAILS SHEET OF SHEETS 06910

5 C GUARD FENCE CONNECT GROUND ROD TO FENCE AND STEEL POLE SHUNT CAPACITOR BANK STEP #1 SHUNT CAPACITOR BANK STEP #2 500 KCMIL COPPER CABLE GUARD FENCE SEE APPL "J" TO MAIN GROUND GRID (CONTINUED ON FIG 1, SH ) C 10 A\ HVCB A\ CAPACITORS FIG 10, S FIG 16, B\ HVCB B\ C\ HVCB C\ 500 KCMIL COPPER CABLE A\ HVCB A\ B\ HVCB B\ GROUND SW S FIG, HVCB S FIG 11, 20 LENGTH, 2"PVC CONDUIT, SEE APPL "J" DISC. SW S FIG THRU FIG 6 THIS DRAWING BUS SUPPORT FIG 12, C C\ HVCB C\ C SUBSTATION SERCURITY FENCE FIGURE 2 TYPICAL GROUNDING ARRANGEMENT FOR 2 STEPS 500KV, SHUNT CAPACITOR BANKS (SEE APPLICATION "J" FOR ALL OTHER CONDITIONS) SHEET OF SHEETS

6 Edge of platform to be appro. 6" from center line of control rod 6" Do not connect structure ground near platform bond. "Y" Copper cable to station ground Show location of platform (Dimension "Y") on Arrangement of foundation dwg. FIGURE GROUNDING FOR TYPICAL STEEL INSTALLATION Fleible Copper Braid Furnished by Switch Manufacturer Steel Bar for 2 or more Switches Copper Cable Bar Lug, Offset Operating Platform Operating Platform Bar Lug, Offset " 1" Everdur Capscrew Code and " Everdur Nut, Code FIGURE FIGURE 5 GROUNDING & BONDING ARRANGEMENT FOR ONE SWITCH GROUNDING & BONDING ARRANGEMENT FOR TWO OR MORE SWITCHES OPERATING ROD SUPPORT SUPPORT TERAL LUG CONTROL CAB. (SHOWN BEHIND) FLEIBLE COPPER BRAID TERAL LUG CONTROL CAB. (SHOWN BEHIND) OPERATING PLATFORM CIRCUIT SWITCHER/MOAS WITH DISCONNECT SWITCH CIRCUIT SWITCHER WITHOUT DISCONNECT SWITCH FIGURE 6 GROUNDING FOR MOAS AND CIRCUIT SWITCHERS SHEET OF SHEETS

7 SWITCH BASES SEE NOTE A EOTHERMIC CONTINUOUS RUN NOTES FIGURE GROUNDING OF GROUND SWITCHES (A) CONNECTION TO SW BASES AND LISTED ON APPROPRIATE BILL OF MATERIALS. WOOD POLE FENCE MOLDING 8-0". CONTROL ROD SUPPORT OPERATING PLATFORM GROUND GRID -0". NOTES OPERATING ROD -0" -0" OPERATOR SUPPORT (SEE NOTE A) -0" GROUND GRID GROUND ROD OPERATING PLATFORM -0" (A) GROUND PAD ON OPERATOR SUPPORT SHALL BE LOCATED AS SHOWN NOTES SEE APPLICATION "S"-IV. SUBSTATION APPLICATION ONLY. (B) FOR BONDING OF PLATFORM, (SEE FIG 5, THIS DRAWING) (C) IF GROUND SW IS USED, RUN ONE GROUND CONDUCTOR FROM GRID TO SW BASE, (SEE FIG, THIS DRAWING) FIGURE 8 FIGURE 9 GROUNDING AIR SWITCH WITH FIBERGLASS CONTROL ROD ON WOOD POLE GROUNDING OF OPERATOR SUPPORT CAPACITOR RACK 2 CONTROL CABINET HVCB TERAL LUG SEE APPL "J" TO COPPER BAR (INSIDE CABINET) LOCATED ON OPPOSITE CORNER LOCATED ON FAR END TERAL LUG GROUND CONNECTIONS TO STATION GRID FIGURE 10 GROUNDING FOR SHUNT CAPACITOR BANKS FIGURE 11 GROUNDING OF HIGH VOLTAGE CIRCUIT BREAKERS SHEET OF SHEETS

8 FT () 6 FT (PREFERRED) GROUND CABLE SHAPE FIG 1, GROUND GRIDS AND CONDUITS SHALL BE ARRANGED IN SUCH A WAY THAT TRENCHES ARE AT A IMUM OF 6 FT FROM DEADEND S. IF GROUND GRID CROSSES ANY CONDUIT RUNS, GROUND GRID SHALL BE ABOVE THE CONDUITS RUNS. 1-6" SPACE FOR PORTABLE GROUNDING TOOLS SHAPE GROUND CABLE AS SHOWN AVOID TRENCHING CLOSE TO FOUNDATION (SEE FIG 1) 1-6" TUBULAR FIGURE 12 GROUNDING DEADEND (TENSION). FIGURE 1 PROVISION FOR ATTACHING PORTABLE GROUND TOOLS 1" CONDUIT TRENCH EOTHERMIC BAR LUG 2-0". FOUNDATION 1-6". 5 5 GROUND GRID PREFFERED TERATION FOR COPPER CABLE ABOVE GROUND AS SHOWN. USE ALLOY HARDWARE ("EVERDUR" OR "DURIUM" TYPE) FOR ALL CONNECTIONS TO S AND EQUIPMENT. FIGURE 1 FOUNDATION CLEARANCES (IMUM DISTANCE OF TRENCH PARALLEL WITH FOUNDATION FOR TRANSFORMERS, HVCB S, ETC.) FIGURE 15 TYPICAL DETAIL OF AN EOTHERMIC CONNECTION PLAN VIEW -0" METALLIC GROSS BRACE (IF CROSS BRACING IS NON-METALLIC GROUND ALL INSULATOR SUPPORT, SEE FIG 22, ). (-WIRE SYSTEM) (-WIRE SYSTEM) INSULATOR ELEVATION FIGURE 16 GROUNDING FOR SERIES S FIGURE 1 FOR UNDERGROUND FEEDER TERATION OR NEUTRAL CURRENT LIMITING SHEET OF SHEETS

9 Ho o 1 2 Ho o 1 2 TRANSFORMER CASE GROUND (FAR SIDE) SEE APPL "C" TRANSFORMER CASE GROUND (FAR SIDE) SEE APPL "C" TO GROUND GRID TO GROUND GRID FIGURE 18 FIGURE 19 GROUNDING OF TRANSFORMER (-WIRE SYSTEM) GROUNDING OF TRANSFORMER (-WIRE SYSTEM) LIGHTNING ARRESTER SEE APPL "R" CLAMP TYPE TERAL (SUPPLIED WITH ARRESTER) LIGHTNING ARRESTER SEE APPL "R" TRANSFORMER CASE GROUND (FAR SIDE) SEE APPL "C" CABLE-FLAT (CONTINUOUS RUN) LIGHTNING ARRESTER GROUNDLOK TEE GROUND ROD TO STATION GROUND GRID TO STA GND TERAL LUG (2 PCS) FIGURE 20 GROUND ROD FIGURE 21 TRANSFORMER WITH LIGHTNING ARRESTER GROUNDING FOR FREE STANDING LIGHTNING ARRESTERS TO STA GND INSULATOR (TYP) HV EQUIPMENT (CAPACITOR,, ETC) HV EQUIPMENT (CAPACITOR,, ETC) FOUNDATION INSULATOR SEE APPL "A" () TO STATION GRID (PLAN VIEW) FIGURE 22 (ELEVATION) TO STATION GRID GROUNDING FOR S WITH MULTIPLE INSULATOR BASES WITH NO CROSS METALLIC BRACING SUPPORT SHEET 9 OF SHEETS 06910

10 CCVT TERAL LUG (2-HOLE) CCVT TERAL LUG (2-HOLE) 250 KCMIL COPPER CABLE-FLAT (CONTINUOUS RUN) TERAL LUG (2-HOLE) TERAL LUG (2 CABLES TO 2-HOLE NEMA) CABLE-FLAT (1-HOLE) #2 AWG CU 250 KCMIL COPPER TERAL LUG (2-HOLE) TERAL LUG (2 CABLES TO 2-HOLE NEMA) CABLE-FLAT (1-HOLE) #2 AWG CU TERAL LUG (2-HOLE) STATION GRID 2-GROUND CONNECTION TO STATION GRID FIGURE 2 NOTE: REFER TO APPL "H" FOR MORE INFORMATION 2-GROUND CONNECTIONS TO STATION GRID FIGURE 2 NOTE: REFER TO APPL "H" FOR MORE INFORMATION GROUNDING FOR 1-UNIT CCVT ON ONE GROUNDING FOR -UNIT CCVT S ON ONE VOLTAGE TRANSFORMER VOLTAGE TRANSFORMER 250 KCMIL COPPER 250 KCMIL COPPER TERAL LUG (2-HOLE) TERAL LUG (2-HOLE) NOTE: REFER TO APPL "I" FOR MORE INFORMATION FIGURE 25 FIGURE 26 NOTE: REFER TO APPL "I" FOR MORE INFORMATION GROUNDING FOR 1-UNIT VOLTAGE TRANSFORMER ON ONE GROUNDING FOR -UNIT VOLTAGE TRANSFORMERS ON ONE FROM CT s WARNING NAMEPLATE 5 9 GROUND WELL DETAILS ITEM CODE DESCRIPTION DEEP WELL SUSPENSED ELECTRODE- AL JB FIGURE 2 WARNING NAMEPLATE TERAL BLOCKS (ES 058) #8 STRANDED OR #10 SOLID CU # CU CABLE NOTE: 1. ALL CURRENT TRANSFORMERS INSTALLED ON SUBSTATION BUSES OR ADDED TO CIRCUIT BREAKERS, POWER TRANSFORMERS, ECT. SHALL HAVE ALL SECONDARY WINDINGS SHORT CIRCUITED AND GROUNDED WHEN NOT IN USE. 2. CONNECT THE #8 OR #10 GROUND WIRE FOR UNLOADED CT s AND REMOVE THE GROUND WIRE FOR LOADED CT S. GROUNDING REQUIREMENTS FOR TERATING SECONDARIES OF CURRENT TRANSFORMERS (JUNCTION BO APPLICATION SINGLE RATIO CT TERAL BLOCK SHOWN) Depth - as specfied 1-0" 8" 10-0" " 0-6" 2" Dia LYNCOLE PART #K-11PGE 11FT LONG CABLE SPLICE 500 KCMIL BCW TO 500 KCMIL BCW KCMIL BCW PIGTAILS GROUND GRID TEE CONNECTORS (SEE NOTE 2) CABLE SPLICE 5000 KCMIL BCW TO 250 KCMIL BCW KCMIL BCW PIGTAILS GROUND GRID TEE CONNECTORS (SEE NOTE 2) Notes: 1. Backfill well hole with a grounding backfill material slurry such as Lynconite or GEMS. Material. Code M A bag of Lynconite will fill 2.2 cu ft. 2. Minumum separation of 2" between Tee connectors FIGURE 28 SHEET 10 OF SHEETS

11 Lead in cable Lead in cable Ground Sw. See Det "B" Steel Pads for support of ground cable clamps See Det "A" Ground Sw. See Det "B" Bushing Voltage Transformer Cabinet Steel pads for support of ground cable cables see Det "A" -0" Ma Bushing Voltage Transformer Cabinet Ground Terminal Ground Cable -0" -0" Ma Ma Ground Terminal Ground Cable Gnd Cable To Sta Gnd POWER CIRCUIT BREAKER (Typical) Gnd Cable To Sta Gnd POWER TRANSFORMER (Typical) FIGURE 29 (Grounding for Bushing Voltage Transformer) Do not use case as part of electrical connection to ground Tank Wall Weld 2" 1" " DETAIL Ground Cable Support " Thick(Min) Steel Pad dia hole Ground Switch #8 Cu Braid Ground Cable with compression type Term per ES Ground Terminal Ground Cable See Gen. Reqt. DETAIL "B" Grounding Requirements Bushing Voltage Transformer Cabinet GENERAL REQUIREMENTS Each Power Circuit Breaker or Power Transformer having a bushing Voltage Transformer on the tank shall have the Voltage Transformer provided with a separate ground lead, independent of the Breaker Frame or Transfomer Case grounding leads. Multiple voltage Transformers on one unit can have their grounding leads bussed together in convenient runs, i.e., for a breaker with 6 voltage transfomers, the on each side can be bussed to a separate single tie into the ground bus and possibly follow the inter voltage Transformer conduit run. The ground cable shall be supported as shown on this dwg. The grounded end of the ground switch of the Voltage Transformer shall be electrically connected to the ground terminal on the cabinet. (See Detail "B"). When adding Voltage Transfomers to eisting installation, provide an independent ground lead from the Voltage Transformer or group of Voltage Transformers and connect to the nearest eposed station ground cables. This sheet supersedes EDS "Requirements For Grounding Bushing Voltage Transformer" SHEET OF SHEETS

12 FLEIBLE COPPER BRAID TO BOND THE LID TO METALLIC COVER FRAME, HOMAC NO. FB22-2N OR EQUIVALENT. 250 KCM CU TO 2-HOLE DMC CONNECTOR 250 KCM CU 1-HOLE STRAP 90 DEGREE CONNECTOR-250 KCM CU DMC #GC29B EISTING GROUND GRID DMC TEE CONNECTOR-250 KCM CU FIGURE 0 5 DISTRIBUTION UNDERGROUND PRIMARY ENCLOSURES WITH METALLIC COVER 5 TYPICAL MATERIALS TO BE USED: (TO BE LISTED ON ARRANGEMENT OF GROUNDING BILL OF MATERIALS) CODE DESCRIPTION CABLE ELECTRICAL BARE COPPER AWG MEDIUM HARD DRAWN STRAND.129 LBS/FT 600 LBS PER REEL. CABLE ELECTRICAL BARE COPPER 1/0 AWG MEDIUM HARD DRAWN STRAND.26 LB/FT 600 LBS PER REEL. CABLE ELECTRICAL BARE COPPER 250 KCM MEDIUM HARD DRAWN 19 STRAND, 0.5" DIA, 0.2 LB/FT. CABLE ELECTRICAL BARE COPPER 500 KCM STRAND, 0.81" DIA, 1.5 LB/FT, MEDIUM HARD DRAWN TERAL LUG STRAIGHT #250-#500 KCM COPPER CADWELD # B-122-EG, " 1", FOR KCM COPPER CABLE TO 2-HOLE NEMA FLAT TERAL LUG OFFSET BAR #250-#500 KCM COPPER CADWELD # B-101-EG-OL TYPE LA," 1" FOR KCM COPPER CABLE TO 1-HOLE FLAT ROD GROUND," 12,(10 MIL COPPER JACKET) CONNECTOR GROUND, #2/0AWG-#250KCM, CABLE-FLAT 1-BOLT #2/0 SOLID AWG TO #250 KCM COPPER. GROUND WELL SUSPENDED ELECTRODE, LYNCOLE PART #K-11-PGE REMARKS (SEE APPLICATIONS, THIS DRAWING) (SEE LIGHTING, EDS 5906) (SEE APPLICATIONS, THIS DRAWING) (SEE APPLICATIONS, THIS DRAWING) FOR CABLE-TO-FLAT, CALDWELD STD. DUTY MOLD, TYPE GL., FOR 250 KCMIL USE CAT. NO. GLC-EG2V, & CATRIDGE NO. 115 (SEE FIG 15, THIS DRAWING) UG-1 DOCUMENT NO , SEE NOTE SHEET 1 ETERNAL NEUTRAL BUS APPLICATION FOR CABLE SUPPORT TO ONLY (SEE APPLICATIONS, THIS DRAWING) FOR COMPRESSION CONNECTORS SEE SHEETS 1, 1, & 15 OF THIS DRAWING. ALL GROUND MATERIAL ECEPT EOTHERMIC MOLDS AND CHARGES (CARTRIDGES) WHICH ARE FURNISHED BY THE CONSTRUCTORS TO BE LISTED ON RESPECTIVE BILL OF MATERIAL FOR VARIOUS ARRANGEMENT DRAWINGS SHEET OF SHEETS

13 TYPICAL PG&E GROUNDLOK APPLICATIONS ARRESTER GC920 TERAL, 2-HOLE GC0/GC1 GROUND ROD GC910 TERAL, 1-HOLE GC0/GC1 TEE GROUND GRID GC60 FENCE POST CONNECTOR GC0/GC1 TEE GC0/GC1 TEE GC920 TERAL, 2-HOLE GC0/GC1 CROSS GC0/GC1 TEE GROUND ROD GC SPLIT TEE EISTING GROUND GRID SEE SHEETS 1 & 15 FOR MATERIALS AND CODE NUMBERS COMPRESION TYPE GROUNDLOK CONNECTORS FOR GROUND GRID SHEET 1 OF SHEETS 06910

14 TYPE OF CONNECTOR TYPE NO. CODE DIM. "A" PAD TYPE HOLES SIZE THICK TUBE OR CABLE MANUFACTURE AND TYPE OR SERIES DEUTSCH POWER CONNECTORS CONNECTOR CAT # HEAD ASSEMBLY CAT # KCMIL CU TO 250 KCMIL CU GC20B DLT5CLHA KCMIL CU TO 500 KCMIL CU GC20B DLT5CLHA KCMIL CU TO 250 KCMIL CU GC20B DLT5CLHA KCMIL CU TO 1/O KCMIL CU GC20B DLT5CLHA KCMIL CU TO # AWG CU* GC20B025-0G DLT5CLHA KCMIL CU TO 500 KCMIL CU** GC20B DLT5CLHA095/ COPPERCLAD ROD TO # CU* GC20B DLT5CLHA095 SPLICE COPPERCLAD ROD TO 1/O CU* GC20B DLT5CLHA KCMIL CU TO 19#8 COPPERWELD GC20B DLT5CLHA KCMIL CU TO COPERCLAD ROD GC20B DLT5CLHA KCMIL CU TO 250 KCMIL CU GC0B DLT5CLHA KCMIL CU TO COPERCLAD CU GC0B DLT5CLHA KCMIL CU TO COPERCLAD CU GC0B DLT5CLHA KCMIL CU TO 500 KCMIL CU GC0B DLT5CLHA KCMIL CU TO 250 KCMIL CU GC0B DLT5CLHA KCMIL CU TO COPERCLAD CU GC0B DLT5CLHA KCMIL CU TO 500 KCMIL CU** GC0B DLT5CLHA095/ KCMIL CU TO 1/O AWG CU GC0B DLT5CLHA KCMIL CU TO # AWG CU* GC0B025-0G DLT5CLHA KCMIL CU TO 1/O KCMIL CU GC0B DLT5CLHA KCMIL CU TO # AWG CU* GC0B050-0G DLT5CLHA05565 BLIND TEE /0 CU TO COPPERCLAD ROD GC0B DLT5CLHA KCMIL CU TO 19#8 COPPERWELD GC0B DLT5CLHA KCMIL CU TO #8 COPPERWELD GC0B DLT5CLHA KCMIL CU TO 250 KCMIL CU GCB DLT5CLHA KCMIL CU TO 500 KCMIL CU GCB DLT5CLHA KCMIL CU TO 250 KCMIL CU GCB DLT5CLHA KCMIL CU TO 19#8 COPPERWELD GCB DLT5CLHA KCMIL CU TO #8 COPPERWELD GCB DLT5CLHA095 SPLIT TEE KCMIL CU TO 250 KCMIL CU GC1B DLT5CLHA KCMIL CU TO COPERCLAD CU GC1B DLT5CLHA KCMIL CU TO COPERCLAD CU GC1B DLT5CLHA KCMIL CU TO 500 KCMIL CU GC1B DLT5CLHA KCMIL CU TO 250 KCMIL CU GC1B DLT5CLHA KCMIL CU TO COPERCLAD CU GC1B DLT5CLHA KCMIL CU TO 1/O KCMIL CU GC1B DLT5CLHA KCMIL CU TO # AWG CU* GC1B025-0G DLT5CLHA KCMIL CU TO 1/O AWG CU GC1B DLT5CLHA05565 THRU HOLE TEE KCMIL CU TO # AWG CU* 1/0 CU TO COPPERCLAD ROD GC1B050-0G GC1B DLT5CLHA05565 DLT5CLHA KCMIL CU TO #2 AWG CU* GC1B025-02G DLT5CLHA KCMIL CU TO 19#8 COPPERWELD GC1B DLT5CLHA KCMIL CU TO #8 COPPERWELD GC1B DLT5CLHA095 NOTES: * SOLID OR STRANDED ** 9 STRAND ROPE LAY COMPRESION TYPE GROUNDLOK CONNECTORS FOR GROUND GRID SHEET 1 OF SHEETS N6

15 TYPE OF CONNECTOR TYPE NO. CODE DIM. "A" PAD TYPE HOLES SIZE THICK TUBE OR CABLE MANUFACTURE AND TYPE OR SERIES DEUTSCH POWER CONNECTORS CONNECTOR CAT # HEAD ASSEMBLY CAT # KCMIL CU TO 250 KCMIL CU GC0B DLT5CLHA KCMIL CU TO 500 KCMIL CU GC0B DLT5CLHA KCMIL CU TO 250 KCMIL CU GC0B DLT5CLHA05565 BLIND CROSS KCMIL CU TO 250 KCMIL CU GC1B DLT5CLHA KCMIL CU TO 500 KCMIL CU GC1B DLT5CLHA KCMIL CU TO 250 KCMIL CU GC1B DLT5CLHA05565 THRU HOLE CROSS /0 AWG CU TO 1 HOLE NEMA PAD GC910B001T DLT5CLHA AWG CU TO 1 HOLE NEMA PAD GC910BL0GT DLT5CLHA KCMIL CU TO 1 HOLE NEMA PAD GC910B025T 500 KCMIL CU TO 1 HOLE NEMA PAD GC910B050T DLT5CLHA095 DLT5CLHA awg CU TO 1 HOLE NEMA PAD GC910BL02GT DLT5CLHA095 CABLE TO PAD KCMIL CU TO 2 HOLE NEMA PAD GC920B025T DLT5CLHA KCMIL CU TO 2 HOLE NEMA PAD GC920B050T DLT5CLHA KCMIL CU TO 2 HOLE NEMA PAD** GC920B05T DLT5CLHA095/ AWG TO 2 HOLE NEMA PAD GC920BL02GT DLT5CLHA AWG TO 2 HOLE NEMA PAD GC920BL0GT DLT5CLHA095 CABLE TO PAD " FENCE POST TO 1/0 CU COND GC60B DLT5CLHA " FENCE POST TO # AWG CU* GC60B-0G DLT5CLHA " FENCE POST TO 1/0 CU* GC60B T DLT5CLHA " FENCE POST TO 1/0 CU* GC60B T DLT5CLHA " FENCE POST TO 1/0 CU* GC60B T DLT5CLHA " FENCE POST TO 1/0 CU* GC60B T DLT5CLHA " FENCE POST TO 1/0 CU* GC60B T DLT5CLHA095 FENCE POST CONNECTOR SWING GATE TO FENCE POST CONNECTOR " FENCE POST TO 1/0 CU* GC60B T DLT5CLHA095 1 " GATE TO " FENCE POST GC62B TO 1/0 CU* 8-002T DLT5CLHA " GATE TO 2 " FENCE POST GC62B2- DLT5CLHA095 TO 1/0 CU* 0-002T " GATE TO " FENCE POST GC62B2- TO 1/0 CU* T DLT5CLHA095 1 " GATE TO " FENCE POST GC62B TO 1/0 CU* 6-002T DLT5CLHA095 1 " GATE TO 6" FENCE POST GC62B DLT5CLHA095 TO 1/0 OR 2/0 CU* DT " GATE TO 8" FENCE POST GC62B2- DLT5CLHA095 TO 1/0 OR 2/0 CU* DT NOTES: COMPRESSION TYPE GROUNDLOK CONNECTORS * SOLID OR STRANDED ** 9 STRAND ROPE LAY SHEET 15 OF 15 SHEETS 06910