ML20211F987
| ML20211F987 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 09/23/1997 |
| From: | NORTHEAST NUCLEAR ENERGY CO. |
| To: | |
| References | |
| MP-772.2, NUDOCS 9710010346 | |
| Download: ML20211F987 (25) | |
Text
. - - _.
56-?W
'O 9
- NDS Document Transmittal #08571 i
9/23/97 i
To:
Nuclear Regulatory Commission Addressee Unique # 140 Document Cont *ol Desk ROUTINE distribution i
Washington, D.C. 20655 The following documents have been revised. You are currently on distribution for these documents. Verify that all documents are included in this distribution set.
DOCUMENI REY COPIES MP 772.2 6
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9710010346 970923 PDR ADOCK 0500 5
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Retum this form to NDS, MP475,3rd Floor, C/O Rick Lundin (x2446) as soon as received.
Signature Date:
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K11LLSTONE NUCLEAR POWER STATION MAINTENANCE PROCEDURE 4
1 Grounding Medium-Voltage GE Switchgear MP 772.2 Rev. 6
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SToe Tsisk
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Acv Seview
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s Approval:
s PORC Mtg. No:
/47-/T-Date:
9 TE: CP'7 Effective Date:
9 D Qi v
Level of Use SME: C.Spohn General i
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Millstone Unit 1 p
i Mairitenance Procedure -
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Grounding Medlune-Voltage GE Switchgear TABLE OF CCNTENTS 1.
PURPOSE....................................................2 2.
P R E R EQ U I S ITES.............................................
2 3.
PRECAUTIONS..............
4 l-4.
I N STR U CTI O N S..............................................
6 4.1 Installation of GTD (Magne-Blast Only)....................
6 4.2 Installation of Workman's Grounds.........................
12 4.3 Removal of Workman's Grounds..........................
16 4.4 Removal of GTD (Magne-Blast Only)......................
17 5.
REVI EW AN D SI G N-O FF....................................
20 6.
R E FE R EN C ES...............................................
20 A
t 7.
SU M M A RY O F CHAN G ES....................................
22 v
ATTACIIMENTS AND FORMS, "Tjpical Ground and Test Device"...................
23 i
(m g
V MP 772 2 Level of Use REVIEW Rev.6 General STOP THINK
'ACT' 1of23
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- 1. PURPOSE p
Q 1.1 Objective 4
The objective of this procedure is to provide instructions for grounding medium-voltage General Electric switchgear.
4 1.2 Discussion This procedure provides instructions for grounding switchgear using a
. Ground and Test Device and workman's groucds. The Ground and Test Device is referred to as GTD throughout this procedure and is applicable to GE Magne-Blast switchgear only.
1.3 Applicability This procedure applies to General Electric medium-voltage switchgear only.
- 2. PREREOUISITES 2.1 General O
V NOTE The installation of blocking devices ( 3adlock, tie-wrap, etc.), as necessary, is performed as part of the Work Orc er or Clearance Sheet for the grounding device installation.
2.1.1 Operations Department has established a tagging boundary for installing grounding device.
2.1.2 Job Leader has verified that equipment isolation and tagging at work site represent safe working conditions.
2.1.3 AWO or Clearance Sheet clearly states which side of cubicle (line or bus) is to be grounded.
2.1.4
' Breaker has been removed.
2.2 Personnel 2.2.1 Both electricians must be qualified in electrical safety and grounding practices and switchgear cubicle preventive
, p maintenance and repair.
'O MP 772.2 Level of Use ST P THINK
'ACT P.EVIEW Rev. 6 General.
2 of 23
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.p 2.3 Tools and Consumables r
g 2.3.1 Equipment Salisbury 4244 ac voltage detector and a known voltage source Approved hot stick, such as Chance-Grip All Elevator handle latch e
General Electric Ground and Test Device l
- 4/0 grounding cables for three-phase grounding systems j
" CAUTION-GROUNDS IN PLACE. DO NOT l
ENERGlZE EQUIPMENT" sign or equivalent
" WORKMAN'S GROUNDS ARE INSTALLED-DO NOT OPERATE" sign or equivalent Hard hat with face shield High-voltage gloves with leather keepers v
Padlock Safety glasses with side shields Switching jacket, such as Charkat FLR-1000 Orange or Sager Co. Pro Ban FR-7A =
2.3.2 Consumables -
Approved cleaning solvent such as isopropyl alcohol or PF degreaser Grease D6A15A1 (red) or Mobilgrease 28 Scotch Brite pads or clean, low -lint cloth
" DANGER" tape for physical barrier a
p v
MP 772.2 Level of Use Generai ST P THINK ACT REVIEW Rev.6 3of23
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- 2.4 Responsibilities t
- y' 2.4.1 Operations Department is responsible for deenergizing voltage sources and for installing and removing tagging clearance.
2.5 Definitions 2.5.1 GTD - Ground and Test Device
- 3. PRECAUTIONS 3.1 Observe two-electrician work rule (one observer, one worker) when grounding switchgear.
3.2 Prior to performing any grounding on any switchgear cubicle, breaker must be removed from cubicle.
NOTE i
A material accountability log is not required for opening switchgear cubicle door on breaker side or removal of rear cable compartment cover that encloses area where workman's grounds are placed.
O V
3.3 Use material accountability log for work performed on switchgear that requires covers to be removed that would expose internal bus work.
3.4 A physical boundary shall be maintained around switchgear while covers are removed or grounding is in progress.
3.5 Some sections of a switchgear may remain energized, depending on plant conditions. Low-voltage circuits such as space heaters and control circuits may also be energized. A thorough understanding of tagging for each switchgear cubicle is required prior to start of grounding.
3.6 Tagging Clearance must be implemented prior to grounding.
3.7 Switching coat, high-voltage gloves, face shield, hard hat, and safety glasses must be worn whenever attaching or detaching grounds on potential voltage sources.
3.8 GTD used for grounding Magne-Blast switchgear must have properly identified bushings marked " BUS" or "LINE," and these must agree with the description in the AWO or Clearance Sheet as applicable. For Magne-Blast switchgear, the " BUS" side corresponds to the front n
bushings and the "LINE" side corresponds to the rear bushings.
Q MP 772.2 Level of Use
-em Rew 6 General sw w
m 4 of 23
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b 3.9 When returning a 4kV circuit breaker to cubicle, an elevator handle latch
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must be installed if the breaker is to remain on the cubicle floor. The elevator handle latch must be removed if breaker is to be rolled out of cubicle.
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/^'t X.J Level of Use MP 772.2 Genera STOP THINK ACT REVIEW Rev.6 5 of 23 J
- 4. INSTRUCTIONS fj V
4.1 Installation of GTD (Magne-Blast Only)
STOP WARNING STOP
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'Ib prevent potential mishaps due to installation of the wrong GTD, only one GTD shall be in the proximity of the cubicle during this grounding activity.
NOTE 1.
This section cannot be performed if blocking device (padlock, tie-wrap, etc.) is installed on the elevator mechanism, thereby preventing GTD elevation.
- 2. illustrates a GTD.
l 4.1.1 ENSURE only one GTD is in proximity of cubicle to be grounded.
4.1.2 ENSURE breaker is removed from cubicle.
4.1.3 ENSURE elevator motor fuse holder and control power fuse holder are set to "OFE" 4.1.4 ENSURE safety tag is hung in or on cubicle.
4.1.5 Refer To AWO or Clearance Sheet as applicable, and dual
-VERIFY location of cubicle to be grounded matches location indicated on Clearance Sheet or AWO.
4.1.6 ESTABLISH physical boundary around cubicle.
O MP 772.2 Level of Use General ST P M
M REWEW
- h. 6 6 cf 23 l
g(3 s OP WARN 1NG STOP Extreme cauGon must be used when installing a GTD into a cubicle. GTD bushings must be properly positioned with respect to " BUS" or "LINE."
l NOTE illustrates GTD components.
4.1.7 Refer To AWO or Clearance Sheet as applicable and, and dual VERIFY GTD bushings are properly positioned " BUS" or "LINE."
C A UTIO N 1.
GTD must be rated for proper voltage and amperage.
2.
Properly sized bushing ball ends must be installed to avoid damage to equipment.
,OG 4.1.8 INSPECT and dual VERIFY GTD condition as follows:
j ENSURE GTD has proper rating for cubicle to be grounded, a.
b.
ENSURE GTD bushing ball ends are proper size for cubicle to be grounded and balls are tight.
c.
ENSURE GTD ground cables are removed from GTD bushing terminal points, d.
ENSURE all ground connections on the device are tight.
ENSURE top plate of GTD is securely tightened to frame, c.
f.
Visually INSPECT GTD bushing ball grease type matches grease installed in cubicle, g.
Visually INSPECT GTD bushing ball ends for damage or scratches.
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MP 772.2 I
Level of Use Genemi ST P THINK ACT REVIEW Rev. 6 7 of 23
h.
E GTD bushing ball ends are damaged CONSULT FLS for pj further direction.
STOP WARNING STOP To prevent injury to personnel, cubicle bushings must not be cleaned.
C A UTIO N l
Emery cloth must not be used to clean GTD bushing balls, i
l NOTE 1.
Cleaning GTD bushing balls is not ordinarily performed.
2.
Bushing balls on GTD may be cleaned using a cloth or Scotch Brite and approved cleaner, such as isopropyl alcohol or PF degreaser, f't i.
E grease on GTD bushing ball ends is hardened or dirty, OR V
grease type in cubicle does not match grease on GTD bushing balls, PERFORM the following:
- 1) Using cloth or Scotch Brite and approved degreaser, REMOVE all grease.
- 2) APPLY thin coat of D6A15A1 or Mobilgrease 28 to GTD bushing ball ends.
Ci
-v Level of USe MP 772.2 General STOP THINK ACT REVIEW Rev. 6 8 of 23
4 O I-STOP WARNING STOP Safety equipment must be donned prior to installing GTD into cubicle.
4.1.9 DON the following safety equipment:
Switching jacket (fully fastened) with hood in place over hard hat l
Safety glasses with side shleids liard hat and face shield liigh-voltage gloves with keepers l
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4.1.10 Observer VERIFY safety equipment has been donned.
4.1.11 INSERT GTD into cubicle.
4.1.12 MOUNT clevator motor in mounting bracket and APPLY latch.
4.1.13 PLUG elevator motor into receptacle on elevator mechanism.
I 4.1.14 REMOVE elevator motor fuse holder and INSTALL back into fuse block in the "ON" position.
I 4.1.15 MOVE a minimum of two cubicles away, and CLOSE cubicle door as far as possible.
CAUTION
% prevent damage to equipment, the GTD must not be overdriven into the stop pins and stop bolts. The GTD is lighter than a circuit breaker, and the elevators will attempt to raise it higher than normal, possibly forcing it to hit the stop pins or stop bolts.
4.1.16 Using elevator motor switch, electrically RAISE GTD slowly, and ENSURE GTD is not overdriven into the stop pins or stop bolts, i
MP 772.2
- Level of Use _
Rev.6 General ST P THINK
-- ACT REVIEW 9 0f 23
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Dual VERIFY no ac voltrige is present at bushing terminal points 4.1.17 v
as follows:
a.
SET the Salisbury 4244 ac voltage detector to "4.2 KV."
b.
Using known source, TEST ac voltage detector and ENSURE operation, c.
Using hot stick and ac voltage detector, TEST for electrical potential and VERIFY tachphase is deenergized.
d.
Using known source TEST ac voltage detector again and ENSURE operation.
c.
SET the Salisbury 4244 ac voltage detector to "240 V."
f.
Using known source, TEST ac voltage detector and ENSURE operation.
g.
Using hot stick and ac voltage detector, TEST for electrical potential and VERIFY cuch phase is deenergized.
h.
Using known source, TEST ac voltage detector again and ENSURE operation.
i.
IE any bushing terminal point is energized, PERFORM the following:
- 1) RACK DOWN GTD.
- 2) CLOSE door.
- 3) NOTIFY FLS.
4.1.18 MOVE a minimum of two cubicles away, and CLOSE cubicle door as far as possible.
4.1.19 RACK DOWN GTD.
4.1.20 RELEASE elevator motor latch.
4;1.21 REMOVE GTD from cubicle.
O MP 772.2 Level of Use
- THINK ACT' REVIEW Rev.6 gggggg STOP' 10 of 23
i.
STOP WARNING SToP s
liigh-voltage gloves must only be removed as necessary to connect ground cables between bushing terminal points and GTD ground shoe connector.
4.1.22 REMOVE high-voltage gloves and keepers.
4.1.23 CONNECT GTD ground cables between bushing terminal points and G1D ground shoe connector.
4.1.24 - DON high-voltage gloves with keepers.
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4.1.25 Observer VERIFY safety equipment has been donned.
STOP WARNING STop Extreme caution must be used when installing a GTD into a cubicle. GTD bushings must be properly positioned with respect to " BUS" or "LINE."
4.1.26 Refer To AWO or Clearance Sheet as applicable and
-, anri dual VERIFY GTD bushings are properly l
positioned " BUS" or "LINE."
l 4.1.27 INSTALL GTD into cubicle.
4.1.28 APPLY elevator motor latch.
C A UTIO N
'Ib prevent damage to equipment, the GTD must not be overdriven into i
the stop pins and stop bolts. The GTD is lighter than a circuit breaker, and the elevators will attempt to raise it higher than normal, possibly forcing it l-to hit the stop pins or stop bolts.
4.1.29 Using elevator motor switch, electrically RAISE GTD slout, and ENSURE GTD is not overdriven into the stop pins or stop bolts.
4.1.30 UNPLUG clevator motor.
(ml MP 772.2 Level o' USe STOP THINK ACT REVIEW Rev.6 ggggj 11 of 23 l
4.1.31 RELEASE elevator motor latch and REMOVE elevator motor from breaker compartment.
4.1.32 REMOVE elevator motor fuse holder and INSTALL back into fuse block in the "OFF" position.
NOTE Line or bus is now grounded.
4.1.33 11' accessary, REQUEST Operations Department ilANG tags on elevator mechanism handle.
4.1.34 INSTALL and dual VERIFY padlock on elevator mechanism handle.
4.1.35 CLOSE cubicle door.
4.1.36 liANO " CAUTION-GROUNDS IN PLACE. DO NOT ENERGlZE EO' 'IPMENT" sign on front cubicle door.
4.2 Installation of Workman's Grounds O
4.2.1 Refer'1b Section 4.1, and dual VERIFY GTD is installed.
j 4.2.2 j
Refer'Ib AWO or Clearance Sheet as applicable, and dual VERIFY location of cubicle to be grounded matches location indicated on Clearance Sheet or AWO.
4.2.3 j
Dual VERIFY elevator handle is locked fonvard as necessaiy to prevent breaker installation.
4.2.4 ENSURE safety tag is hung in or on cubicle.
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Level of Use 4... #-
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Genew ST P
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(ACT REVIEW Rev.6 e 3 y%
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5 4.2.5 INSPECT and dual VERIFY workman's grounds as follows:
O ENSURE cables in ground clamps are tight.
ENSURE components on ground clamps are not damaged or
-broken.
ENSURE smooth o closing mechanism. peration of ground clamp opening a ENSURE cable strands are not broken.
4.2.6 PROCEED to cable compartment at rear of cubicle.
4.2.7 COUNT cable cubicles, and dual VERIFY cable cubicle to be grounded matches location indicated on Clearance Sheet or AWO.
4.2.8 ESTABLISII physical boundary around cubicle.
4.2.9 LOOSEN, but do not remove, fasteners securing cubicle rear panel.
sToP WARNING sToP Safety equipment must be donned prior to installing workman's grounds.
4.2.10 DON the following safety equipment:
Switching jacket (fully fastened) with hood in place over hard hat Safety glasses with side shields 1 lard hat and face shield
- liigh-voltage gloves with keepers
/
4.2,11 Observer VERIFY safety equipment has been donned.
4.2.12 REMOVE cubicle rear panel.
4.2.13 REMOVE grounding connection protective covers.
MP 772.2 Level of Use ST P THINK ACT' RE}/IEW Rev.6
- General
- 13 of 23 -
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4.2.14 j
Dual VERIFY no ac voltage is present at bushing terminal points as follows:
a.
SET the Salisbury 4244 ac voltage detector to "4.2 KV."
b.
Using known source, TEST ac voltage detector and ENSURE operation.
1 c.
Using hot stick and ac voltage detector, TEST for electrical potential and VERIFY cach phase is deenergized.
d.
Using known source, TEST ac voltage detector again and ENSURE operation.
c.
SET the Salisbury 4244 ac voltage detector to "240 V."
f.
Using known source, TEST ac voltage detector and ENSURE operation, g.
Using hot stick and ac voltage detector, TEST for electrical potential and VERIFY cach phase is deenergized, h.
Using known source, TEST ac voltage detector again and p
ENSURE operation.
V 1.
IE any bushing terminal point is energized, INSTALL cubicle rear panel and NOTIFY FLS.
STOP WARNING STOP Workman's grounds must be installed and tightened on the grounding bus or station ground before installing workman's grounds on grounding studs.
4.2.15 CONNECT workman's grounds to grounding bus or station ground.
Oy MP 772.2 Level of Use ST P THINK
'ACT REVIEW Rev.6 Gened 14 of 23 a/*H-p 3r
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W STOP WARNING STOP Workman's grounds for switchgear cubicles nmst be installed on grounding connections using high-voltage gloves.
4.2.16 INSTALL and TIGIITEN workman's grounds on all three phases.
4.2.17 IIANG "WORI'. MAN'S GROUNDS ARE INSTALLED-DO NOT OPERATE" sign on front of cubicle.
4.2.18 REQUEST Operations Department IIANG tagging.
4.2.19 Temporarily INSTALL cubicle rear panel.
4.2.20 IE necessary, Go lb Section 4.4 and REMOVE GTD.
OC I
/^1 MP 772.2 Level of Use ST P THINK AT REVIEW Rev.6 Gened 15 of 23
- _ -. _ _ __ _ ;i:_-.
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4.3 Removal of Workman's Grounds 4.3.1 Refet Tb AWO or Clearance Sheet as applicable, and dual VERIFY location of cubicle from which grounds will be removed matches location indicated on Clearance Sheet or AWO.
f 4.3.2 Daal VERIFY elevator handle is locked fonvard as necessary to prevent breaker installation.
4.3.3 PROCEED to cable compartment at rear of cubicle.
4.3.4 COUNT cable cubicles, and dual VERIFY cable cubicle from which grounds will be removed matches location indicated on Clearance Sheet or AWO.
4.3.5 REQUEST Operations Department REMOVE tagging from workman's grounds.
STOP WARNING STOP Safety equipment must be donned prior to removing workman's grounds.
4.3.6 DON the following safety equipment:
Switching Jacket (fully fastened) with hood in place over hard hat Safety glasses with side shields liard hat and face shield e
liigh-voltage gloves with keepers
/
4.3.7 Observer VERIFY safety equipment has been donned.
4.3.8 REMOVE cubicle rear panel.
/~N MP 772.2 Level of Use General ST P" THINK '
ACT R5 VIEW Rev.6 16 of 23
STOP WARNING sTop Workman's grounds must be removed from the grounding connections on all three phases before removing workman's grounds from grounding bus or station ground.
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4.3.9 REMOVE workman's grounds from grounding connection on all
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threephases.
4.3.10 INSTALL grounding connection protective covers on all three phases.
4.3.11 REMOVE workman's grounds from grounding bus or station ground.
4.3.12 Dual VERIFY removal of ground cable.s.
4.3.13 INSTALL cubicle rear panel.
4.3.14 REMOVE" WORKMAN'S GROUNDS ARE INSTALLED-DO NOT OPERATE" sign from cubicle.
O V
4.3.15 REMOVE padlock from elevator mechanism handle.
4.3.16 REMOVE physical barrier.
4.4 Removal of GTD (Magne-Blast Only) 4.4.1 REMOVE padlock from elevator mechanism handle.
4.4.2 ENSURE no tagging clearances or blocking devices are installed on elevator mechanism in cubicle or on GTD.
4.4.3 REMOVE eleufor motor fuse holder and INSTALL back into fuse block in the ON" position.
4.4.4 MOUNT elevator motor in mounting bracket and APPLY latch.
4.4.5 PLUG clevator motor into receptacle on elevator mechanism.
C)
MP 772.2 Level of Use Rev.6 General ST P THINK ACT REVIEW 17 of 23
]
r sTop WARN 1NG STOP Safety equipment must be donned prior to removing GTD from cubicle, j
4.4.6 DON the following safety equipment:
6 Switching jacket (fully fastened) with hood in place over hard hat Safety glasses with side shields liard hat and face shield e
liigh-voltage gloves with keepers
/
4.4.7 Observer VERIFY safety equipment has been donned.
4.4.8 Using elevator motor switch, electrically LOWER GTD to fully lowered position (motor stops operating).
4.4.9 REMOVE elevator motor fuse holder, and INSTALL back into O
r# e dieck ie the ore" e eitie#.
4.4.10 UNPLUG elevator motor from receptacle.
4.4.11 REMOVE elevator motor from mounting bracket.
4.4.12 REMOVE GTD from cubicle.
4.4.13 Visually INSPECT cubicle elevator mechanism and position switch operator arm for damage.
4.4.14 E any damage is found, CONSULT FLS for further direction.
4.4.15 Dual VERIFY and DISCONNECT ground cables from ground bushing terminal points on GTD, 4.4.16 E workman's grounds are to remain installed, INSTALL and dual VERIFY padlock on elevator mechanism handle.
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MP 772.2 1 T, j* F k-Level of Use
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"A F "59w-Rev.6 General w
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18 0f 23 c'
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4.4.17 E workman's grounds have been removed, PERFORM the O-following:
a.
E necessary, RETURN circuit breaker to cubicle floor, and INSTAL.L elevator handle latch.
b.
REMOVE " CAUTION' GROUNDS IN PLACE. DO NOT l
ENERGlZE EQUIPMENT" sign from front cubicle door.
c.
REMOVE physical barrier.
4.4.18 E necessary, RETURN GTD to storage.
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A MP 772.2
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-ACT' REVIEW Rev.6 enetal j,..
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19 of 23
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- 5. BEVIEW AND SIGN-OFF C:
5.1 The following sections of this procedure were used:
All O specific sections l
Entire procedure or sections were completed. (Check one):
Yes O No O If procedure was terminated prior to completion, specify cause:
l Acceptance criteria verified (Located at steps 4.1.5,4.1.7,4.1.8,4.1.10, 4.1.17,4.1.25,4.1.26, 4.1.34,4.2.1,4.2.2,4.2.3,4.2.5,4.2.7,4.2.11,4.2.14, 4.3.1,4.3.4,4.3.7,4.3.12,4.4.7, and 4.4.15)
Grounds Installed:
Performed By
/
Date Name (Printed)
Signature Verified By
/
Date
- Name (Printed)
Signature Grounds Removed:
Performed By
/
Date Name (Printed)
Signature Verified By
/-
Date Name (Printed)
Signature -
- 6. REFERENCES 6.1. NNECo Accident Prevention hianual 6.2 Administrative Procedures O
h1P 772.2 Level of Use
-~
~-
REVIEW.
Rev.6 General ST P THINK
.ACT-20 of 23
6.2.1 CC 1," Control of Chemical Consumable Products" C-6.2.2
- UI WC 2 " Unit 1 Tagging" 6.3 Vendor. Manuals 6.3.1 25202-300-012A, gel-77041,'" Ground and 'Ibst Device, Instructions and Renewal Parts" 6.4 Other Documents 6.4.1
'Itchnical Evaluation TE-Ml-96-020," Restraint of 4160 Magne-Blast Circuit Breakers When Lowered Within the Cubicle" 6.4.2 ACR M1-96-0845 6.4.3 9/16/97 fax from J. Buchanan of W. II. Salisbury & Co. to D.
Chase of NU regarding ac voltage detector thresholds O
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" O MP 772.2 Level of Use' ACT'
' REVIEW Rev.6 General ST P THINK '
21 of 23 l
- 7.
SUMMARY
OF CIIANGES C-
- 7.1 The content of this procedure was modified to incorporate new format criteria specified in DC 2," Developing and Revising Procedures and Forms." Additional changes include the following:
Incorporated interim change I which added a step to install padlock on elevator mechanism handle.
Incorporated interim change 2 which added a precaution and instruction to install the elevator handle latch. This device is installed to prevent breaker from contacting cubicle door during a seismic event.
l Added requirement to install the GTD prior to installing workman's grounds.
Added requirement to maintain a physical boundary around switchgear while covers are removed and grounding is in progress.
Added numerous dual verifications of step performance.
Added instructions for inspecting the GTD prior to use.
Specified the use of the Salisbury 4244 ac voltage detector.
Added information reflecting that grounding can be performed with an AWO and/or Clearance Sheet.
I
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MP 772.2 Level of Use THINK ACT
' REVIEW...
Rev. 6 STOP' General _
22 of 23
. o' Att:chment 1
'lipical Ground and Test Device n
(Sheet 1 of 1)
C NOTE Iloth "llus Side" and "Line Side" bushing asseribiles are shown; however, only one type of bushing assembly may be installed.
Ilus Side Ilushing Assembly g
Line Side liushing Assembly i
I Top I' late Assembly Device Nameplate N
I A
N n
I ilus Side liushing j
insulating liarriers Terminal Point N
o N
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Line Side ilushing Terminal Point Device Frame N
- s
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I Ground Shoe Front i
Device Ground Shoe Connection d
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N
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Side View (Side Removed)
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Level of Use MP 772.2 General ST P THINK ACT REVIEW Rev.6 23 of 23 o