Class 8110 High Voltage Drawout Contactor Type E, Series A
W1001146 8110-7 SERVICE BULLETIN
AUGUST, 1978
Supersedes SB 8110-7 Dated 11/76
Class 8110 High Voltage Drawout Contactor
Type E, Series A
General Inspection Preparation for installation Maintenance Parts listing Troubleshooting
SQUAREI] COMPANY . P. O. Box 9247,Columbia, S C. 29290
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GENERAL DESCRIPTION
The Class 8110 Contactor is a 3 pole, drawout , clapper type, air break device. The contactor is rated at 5000 volts, 360 amperes (enclosed), 60 KV BIL. and has an interrupting capacity of 50 MVA RMS symmetrical.
This contactor is designed to meet UL Standard No. 347 and NEMA Standard ICS 2-324.
The contactor can be supplied in four configurations, con-
sisting of the following assemblies, for various applications:
1. Standard Contactor Assembly (figure 1) includes :
* a. Basic contactor . b. Three power fuses with fuse clips. c. Control power transformer : 750VA, 1 (Z) 120V secondary. with two primary fuses.
Note: This contactor assembly is used as:
Main Contactor (M) on:
·Full voltage non-reversing starters ·Reduced voltage auto- transformer starters ·Wound rotor motor starters
Start Contactor (S) on:
·Reduced voltage primary reactor starters
2. Contactor with Third-Stab Assembly includes:
a. Standard contactor assembly as described under 1 above.
b. Third-stab assembly mounted below the blowout coil assembly (see figure 2 for location).
Note:
Third-stab assembly is supplied on "Forward" (F) contactor of reversing starter . It is also used as disconnect switch for potential transformers or static exciter for a synchronous motor starter.
FIGURE 1 Standard Contactor
Assembly
3. Special Contactor Assembly includes:
a. Basic contactor . b. Third-stab assembly mounted below the blowout coil
assembly (see figure 2. rear view, for location).
c. Front bus assembly in place of power fuses and fuse clips (see figure 2, front view, for location).
Note : This contactor assembly is used as:
RUN (R) contactor on: Reduced voltage starters
REVERSE ( R) contactor on: Reversing starter
4. Mechanically Latched Contactor Assembly includes:
a Standard contactor assembly, described under 1 above.
b . Latching mechanism mounted on the left hand side plate of the contactor (see figure 3 for location).
Note:
Mechanically latched contactor assembly is used primarily for:
·Transformer feeder circuits ·Transfer schemes ·Applications where it is desirable to have the con-
tactor remain closed, should the voltage dip or fall.
One 750VA control transformer with two primary fuses is supplied as standard on 1 , 2 and 4 above; however , a maximum of 2500VA capacity control transformer can be
mounted on the contactor . Two 750 control transformers
can be supplied on the contactor to obtain three phase
power . In this case, three primary current limiting control
fuses are furnished ( figure 4). Wiring diagram of the starter should be consulted to determine control transformer ca-
pacity and arrangement.
* NOTE: The basic contactor assembly for Class 8198 and Class 8196 starters are the same except for additional pins on side plates of contactor to be used on 8196 starters. See page 7 for details.
FRONT VIEW
REARVIEW
FIGURE 2
Front View Special contactor assembly with frooi-fcus assemblies ( without cont 'ol t 'ansformer . power fuses and luse clips) .
- Rear View Special contactor assembly with Ihlrd stab assemp les
FIGURE 3 Mechanically latched contactor with latching mechanism Topping solenoid mounted in front is optional.
FIGURE 4
Contactor with two control transformers and three primary control fuses lo obtain 3<Z>
power
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UNCRATING
Examine shipping crate before unpacking the contactor to make sure it has not been damaged in transit. If shipping crate is damaged, pay particular attention when unpacking to see if contents are also damaged. Notify carrier if damage is found. Also notify local Square D field office of damage.
INSPECTION
A. PRELIMINARY INSPECTION
1 . Check the contactor visually for good condition. Inspect all parts for secure mounting and good elec-
trical connections.
2. Check that fuse holder clips are not bent or deformed. Be sure that all fuses fit firmly in fuse clips.
3. Pull out power fuses by hand-- first from top clip and then from lower clip. Next, remove phase barriers
by lifting straight up (approximately 1 ") then tilting backward and sliding them out. Also remove the arc chutes by lifting straight up with both hands until clear of contactor . NOTE : NO TOOLS ARE REQUIRED TO REMOVE
THESE PARTS.
4 . Check to be sure that the operating shaft rotates easily. Close contactor armature manually to check contact tip alignment (see figure 5). Release armature slowly and check that shaft rotates out of engagement freely.
5. Check to be sure that all connections are secure.
6. Inspect control circuit receptacle for possible dam-
age.
B. ROUTINE INSPECTION The contactor should be inspected at intervals determined by the service conditions. The following table can be used as a guide:
CAUTION
DO NOT USE CONTACTOR LINE AND LOAD STABS TO MOVE OR LIFT THE CONTACTOR. THE STABS ARE ALIGNED AT THE FACTORY. TO ROLL THE CONTACTOR, USE HANDLE IN FRONT.
Contactor with power fuses, pnase barners
and arc cnuies
removed Contacts closed manually
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FIGURE 5
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FRONT VIEW
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FIGURE 6
SIDE VIEW
Front View
< Rignt Pole of Contactor )
·Clearance between arc chute and pedestal must not exceed 3/16"
·Remove power fuses to check this clearance.
Suiicnary Cmttacl lias?
.COPlSClor
r oe
Contactor Righi Side View
(Blowout Coils Line & Load Fingers not shown)
- ·Distance between top of arc chute anc stationary contact base must not exceed 1 1/8 ·Check thai phase barriers are mstalleo as shown
OPERATING CONDITION
ENVIRONMENT
INSPECTION TIME PERIOD
·Contactor in continuous operation up to 16 hours
during a 24 hour day except for isolated instances.
Contactor operating in clean atmosphere.
Every two months
·Maximum two start-stop operations per day.
·Contactor under intermittent operating conditions for Contactor operating in clean
24 hours during a day.
atmosphere.
Every month
·Maximum one start-stop operation within 3 hour
time period except for isolated instances.
·Contactor under intermittent operating conditions for 24 hours during a day.
·Maximum one start-stop operation within 3 hour time period except for isolated instances.
Contactor operating in highly contaminated atmosphere with chem-
ical fumes, gases and/or fine dust.
Every week
NOTE: If trouble is found during inspection, repairs should be made immediately.
MAKE SURE, FOLLOWING ANY INSPECTION, THAT ALL CONNECTIONS ARE TIGHT, ARC CHUTES, FUSES AND ALL FOUR PHASE BARRIERS ARE NOT DAMAGED AND ARE PROPERLY INSTALLED BEFORE ENERGIZING THE CONTACTOR. SEE FIGURE 6.
3
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* PREPARATION FOR INSTALLATION
CAUTION
DO NOT USE CONTACTOR LINE AND LOAD STABS TO MOVE OR LIFT THE CONTACTOR. THE STABS ARE ALIGNED AT THE FACTORY. TO ROLL THE CONTACTOR, USE THE HANDLE IN FRONT.
NOTE: Before installation, check that contactor part number (P.N.) on its nameplate matches the contactor part number on label located inside high voltage compartment door of the starter.
(a) Remove contactor from shipping pallet to contactor lift
jack. Class 8198 Type HJ-2 (can be purchased from Square D Company, see figure 7).
(b) Make sure the two front wheels of the contactor are positioned in the slots provided on the tray of the lift
jack.
(c) Secure the contactor by inserting safety pin into the hole on the tray behind the front right wheel of the contactor. The pin is attached to the lift jack tray.
FIGURE 7
INSTALLATION For details, refer to instructions on the label inside the High Voltage Compartment Door
(d) With the lift jack tray in its lowest position, move the contactor near its proper compartment (see note above). The contactor should be transported on the lift jack with the tray lowered to bottom position.
TESTING
For details, refer to Service Bulletins 8198-2 or 8196-1.
(e) Move drawout handle for the High Voltage Compart ment to the down position and open the door.
CAUTION
Note: Drawout handle is not provided for `Reverse' (R) contactor in reversing starter. `Start ' ( S) and 'Run' (R) contactors in Autotransformer starter
and `Run' (R) contactor in Primary Reactor starter.
* NOTE: This section does not apply to Class 8196 starters since
contactors are shipped inside the starter section.
WHEN CHECKING CONTACTOR ENGAGEMENT BE SURE INCOMING LINE TO
VERTICAL SECTION IS DE-ENERGIZED.
MAINTENANCE
1. CLEANING
CAUTION
Clean all dirt or dust from the contactor . Pay particular attention to insulators and tracking surfaces. Foreign
ALL POWER SHOULD BE DISCONNECTED
materials from these surfaces should be removed
FROM THE STARTER EQUIPMENT PRIOR TO PERFORMING ANY TROUBLESHOOT-
2. CONTACT TIP INSPECTION AND REPLACEMENT Remove power fuses if used (85) or front bus
ING OR MAINTENANCE WORK ON THE
assembly, phase barriers (94) and arc chutes (93). See
CONTACTOR. HOWEVER, THE EQUIPMENT HAS BEEN DESIGNED TO PERMIT LIMITED MAINTENANCE AND/OR TESTING ON THE CONTACTOR AFTER IT HAS BEEN
page 3 for instructions. Discoloration of surfaces and slight pitting is normal. If contact surfaces show grooves, deep pits or are structurally weakened, they
should be replaced.
ISOLATED FROM THE MAIN POWER. WHEN PERFORMING THIS WORK, EX -
To check for contact wear, move the armature by hand until the contacts just close Gauge the distance from
)
TREME CAUTION MUST BE EXERCISED IN VIEW OF THE PRESENCE OF HAZARDOUS
VOLTAGE.
the armature to the top of the magnet frame. If this
' distance is less than A " (see figure 8) due to contact
wear or erosion, the contact tips should be replaced.
J
IT IS RECOMMENDED THAT CONTACTOR BE REMOVED FROM THE HIGH VOLTAGE
COMPARTMENT FOR ADDITIONAL SAFETY AND EASE OF MAINTENANCE.
For contact tips replacement , refer to instruction sheet (51033-510) enclosed with contact tip replacement kit.
3. CONTACT FORCE The contact force should be 22 ± 4 pounds on each power contact. This force will be maintained unless
contact arm springs (64) have been badly overheated
Note: See page 7 and 8 for item number listing
or damaged In this event, the entire assembly (63)
must be replaced. To measure initial contact pressure,
hold the armature in a position just to close the con-
tacts. Insert the cloth tape around one of the moving
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MAINTENANCE
CONTACT FORCE (continued)
contacts as shown in figure 9 and pull the tape with
spring scale until the contact just opens. For proper
n angle of pull, the tape should barely touch the top edge
of the fuse clip (see figure 9).
.25
fuse is identical to original fuse. Pull down front end of fuse gently, then pull the fuse from rear fuse clip as shown in figure 10. When installing replacement fuse, insert rear end first and then push up front end so that
it sets firmly in clips.
O
Checking Contact Wear
FIGURE 8
Spring Scale
Cloth Tape
(H
Fuse Clip
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CPT Fuse Replacement Magnet Coil Replacement
FIGURE 10
7. ARC CHUTES New arc chutes are pre-conditioned and give the appearance of having been used. Under normal service these arc chutes rarely need replacement. If the arc chute is broken or arc runners are eroded, the arc chute should be replaced. When operating under adverse environmental conditions, contamination of arc chutes may occur .
Initial Contact Force Measurement
FIGURE 9
Note: Deterioration of arc chutes can be detected by performing `HIPOT' test (13,250 volts ac for one minute) between arc runners. If breakdown (arc-over)
4. LINE AND LOAD FINGERS (DISCONNECT
occurs, arc chute should be replaced.
ASSEMBLY) REPLACEMENT
If disconnect fingers become pitted, burned, or damaged, entire Disconnect Assembly (74) must be replaced. Before installing replacement assembly, coat sides of the Power Fuse Bus Assembly ( 76) with special deoxidizing lubricant (item #107, page 8) where finger assemblies mate. Under no circumstances should any other lubricant be used on these surfaces.
Note:
Should pitting or burns be observed on the contactor fingers, inspection should be made of the mating stabs in the starter compartment from which the contactor is removed.
8. MAGNET COIL REPLACEMENT
Note: Coil resistance may be measured to determine
if it is defective. The coil resistance should be
33 ± 3 ohms at 25°C.
Disconnect the two wires from coil. Remove the two
bolts (4) and two washers (67) holding the core to the back of the magnet frame. Be sure to support coil to prevent dropping. Coil along with core can now be removed by sliding it away from contactor side plate. Remove the coil from core and replace it with new one . Attach core and coil assembly in same position with the two screws and the two washers. Be sure to insert
large spring washer (61) between coil and magnet
CAUTION
frame (15) as before. Reconnect the two wires to coil terminals (see figure 10). The hole in the armature
POWER MUST BE DISCONNECTED FROM STARTER VERTICAL SECTION BEFORE IN-
plate must clear the core cap screw (8) and the lock washer (9).
SPECTING STABS.
9. RECTIFIER REPLACEMENT
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Rectifier output can be measured to determine if it is defective. To measure rectifier output:
)
5. POWER FUSE REPLACEMENT Fuse size and rating are determined by motor full load
a) Disconnect 2 wires connected to the coil and put insulating tape around them.
and locked rotor currents. Information on size of the
b) Energize control circuit .
fuse is given on the nameplate of the starter. Make sure replacement fuse is identical to original fuse. Pull fuse from top fuse clip first and then from lower clip. When installing new fuse, make sure it is centered between fuse clips and is firmly held by the fuse clips
c) Check the dc output across terminals " + " and
" - " of rectifier. Rectifier output should be 107 ± 5 volts dc , with 120 volts ac input . d) If rectifier is defective, replace it with new one.
at top and bottom.
10. REACTOR (CHOKE) REPLACEMENT
6. CONTROLTRANSFORMER PRIMARY FUSE REPLACEMENT Control transformer primary fuses are selected on
Check reactor resistance. DC resistance should be
10 ± 2 ohms at 25°C. Replace it if resistance is not
within these values.
basis of transformer rating. Make sure replacement
MAINTENANCE (continued page 6)
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MAINTENANCE
11. ELECTRICAL AUXILIARY CONTACT BLOCK
REPLACEMENT
To replace an electrical auxiliary contact block, it is necessary first to remove magnet control assembly (32) by removing three screws (54) and lockwasher (14). Individual blocks may be replaced as needed and the assembly can then be mounted to side plate. Contact block to which coil is connected is mounted in the
fourth position from the side plate and is offset 0.1 " from the other blocks. DO NOT USE N.O. CONTACT OF THIS AUXILIARY CONTACT BLOCK (see fig-
ure 11).
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Auxiliary Contact
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Block Bracket Optional Auxiliary
Contact Blocks
FIGURE 11
Contactor Side Plate
12. CHANGING RECEPTACLE (CONNECTOR)
The receptacle lor the control circuit plug consists of connector block ( 45) and connector pins with wire leads inserted from rear. No tool is required for inserting connector pins but to remove pins in order to replace broken ones requires an extraction tool, item
#108, page 8. This tool, inserted into the connector block from front, compresses retention spring, allow-
ing the lead and pin to be withdrawn from block .
13. SHAFT BEARINGS These are pre-lubricated, sealed bearings and need no further lubrication.
CAUTION
MAKE SURE, FOLLOWING ANY MAINTENANCE, THAT ALL CONNECTIONS ARE TIGHT; ARC CHUTES, FUSES AND ALL FOUR PHASE BARRIERS ARE NOT DAMAGED AND ARE PROPERLY INSTALLED BEFORE ENERGIZING THE CONTACTOR. See Figure 6.
TROUBLESHOOTING CHART
TROUBLE
Magnet-Armature Chatters
POSSIBLE CAUSE
1) Loose connection in control circuit. 2) Defective control relay. 3) Defective magnet: Coil/ Rectifier / Reactor (Choke)
4) Auxiliary contact block in coil circuit out of alignment.
5) Low control circuit voltage
REMEOY
1} Check connections and tighten if loose 2) Check control relay, replace if defective 3) Check coil, rectifier , and reactor (choke) see page 5 for details.
Replace if defective 4) Check alignment, see figure 11. page 6 5) Check control circuit voltage Should be minimum 100
volt 5 lor proper operation
Sluggish Operation
1) Mechanical interference in armature or contactor shaft 2) Interference with mechanical interlocks between contactors. 3) Defective coil or control circuit
1) Cneck to see if shaft rotates freely Check to see if bolthead and lockwasher on coil core clear hole in the armature
2) Mechanical interlock binding Refer to 8198- 2 Service Bulletin Supplement 8198-2.1 for details to make the check
3 ) Check coil ( see page 5 for details) and control circuit
Contacts Overheat and Contact Life Short
1) Loose connections. 2) Stationary and moving contact tips not properly aligned 3) Dirt or foreign matter on surfaces 4 ) Contact surfaces scored, burned or contact tips
worn beyond limits 5) Contact pressure weak / contact bounce due to
defective contact springs. 6) Arc Chutes nol installed properly.
1) Protective relay tripped, or power fuses blown.
Contacts Do Nol Close
Coil Overheats Line/ Load Fingers Overheat
2) Control circuit fuse blown 3) Magnet coil/ rectifier defective. 4 ) Control relay defective 5) Control transformer primary fuses blown
1) Defective reador (Choke ) 2) Defective auxiliary contact block m coil circuit . 3) Detective coil (short circuited turns)
1) Dirt or foreign matter on surfaces.
2) Defective springs in finger assembly. 3) Lack of special lubricant (item 107, page 7).
1) Check Connections and tighten if loose 2) Align contact tips 3) Remove dirt or foreign matter . 4) Inspect contact surfaces Check for contact wear, see figure 8 , page 5.
5) Check initial coniact force, see figure 9, page 5. for details
6) Check figure 6 page 3 for proper installation.
1) Check the protective relays Reset if tripped Check the power fuses; replace if blown
·Note Before resetting protective relays and/or replacing blown fuses , a checK must be made to determine the cause
2) Inspect the fuse, replace if blown 3) Check coil and/or rectifier See page 5 for details Replace if defective 4 } Check control relay . Replace if defective 5) Inspect fuses, replace if blown
1) Check reactor { see page 5 for details) . Replace if defective. 2) Check auxiliary contact block. Replace if defective. 3) Check resistance of the coil. See page 5 for details Replace if defective
1) Remove dirt or loreign matter. 2) Check springs. Replace entire finger assembly if springs are defective 3) Apply special lubricant See page 5 for details
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Control Power Transformer
Arc Chute
Phase Barrier
DC Magnet Coil
Auxiliary Contact Block Bracket
Control Circuit Receptacle
Primary Control Fuse
Power Fuse
MAIN COMPONENTS CLASS 8110 HIGH VOLTAGE CONTACTOR
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PEDESTAL ^
CONTACT CLIP
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STATIONARY CONTACT BASE
74
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OPTIONAL BUS-STAB ASSEMBLY (THIRD STAB)
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OPTIONAL DOUBXE TRANSFORMER ASSEMBLY
Item No. Part Number
1 051033-375-50
2l A52910-005-50 2b A52910-006-50
3 B51033-431-50
4 21401-24320
5 23602-12409
6 23002-00240
7 29013-07640
8 21401-22240
9 23701-00220
10 22710-22240
11 23002-00220
12 A51033-442-01
13 21401-20160
14 23701-00200
15 A51033-388-50
16 C51020-056-85
17 B50502-006-22
18 850502-006-15
CO
19 051033-391-50
20 A51033-392-01
21 A51033-393-01
22 A51033-390-01
23 21401-24660
24 23701-00240
25 21401-20320
26 B51033-394-01
27 21401-22480
28 21401-20240
29 23601-00200
30
t'
31 C51033-421-50
2
u
32
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33 C51033-422-01
34 A51042-096-01
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35 A51033-435-50
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36 21911-12160
37 23101-00120
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38 27907-34121
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Parts List for Class 8110 High Voltage Contactor
Item
Description
No.
Frame Assembly ( Includes items 1 2, 1 3 & 14)
39
* Cam Follower Roller (V -28)
Cam Follower Roller (5/16-24)
40 41
(After August 1977)
42
Wheel Assembly
43
3/8 - 1 6 x 1 Hex Screw
44
3/ 8 Washer (Spacer)
45
3/8 - 1 6 Hex Nut
·46
Bearing - Housing Assemblies
·47
5/16 - 18 x VA Hex Screw
·48
5/16 Plain Lockwasher
·49
5 5
/ /
1 1
6 6
-
1 1
8 8
x V*
Hex
Rd. Nut
Hd.
Sq.
Neck
Bolt
·50
Contactor Stop
·51
VA - 20 x 1/2 Hex Screw
VA Plain Lockwasher
·52
Magnet Frame Assembly
53
Operating Coil
54
Core Cap
55
Core Cap Spacer
56
Interlock Arm Assembly
57
Armature Clamp
58
C.C.C. Knocker
Armature
59
3 / 8 * 1 6 x 2 7« Hex Screw
60
3 / 8 Plain Lockwasher
61
VA - 20 x 1 Hex Screw
62
Armature Stop
63
5 / 1 6 - 1 8 x 1 7 2 Hex Screw
VA - 20 x VA Hex Screw (for 2500VA trans. or
64
2 - 750VA trans. use ref . 25)
65
74 Washer, Plain
Control Transformer Assembly (Refer to wiring 66
diagram supplied with the specific equipment)
67
Transformer Mounting Plate Assembly
68
C.C.C and Magnet Control Assembly, Completely 69
Wired (includes items 33 thru 54) Consult Factory 70
C.C.C. Mounting Bracket
71
Liner
72
Electrical Interlock Assembly
73
#6 - 32 x Vi Pan Screw Assembly
#6 - 3 2 Square Nut
Rectifier
Part Number
27920-81500
21915-14320
A51033-432-50
23001- 00170 23201-00170 21507-17120 25410-03560
21101-12160
23704-00120 23001-00121 25410-90025
25410-90024
B51033-425-01 21402- 21160 A51033-476-01 25901-05560 21916-17160 21711- 22320
23001-00220 D51033-360-01 A 51020-041-01 1571-002020 D51033-384-50
A51033-023-01 Class 9996 Type LA-2 Parts Kit 21401- 24360 23903-32402 23601-00240 21401-26480
23601-00280
23701-00280 23002-00280 C51033-401-50
Description
Item
No. Part Number
Transient Voltage Suppressor
. #8 - 3 2 x 1 Fil Hd Screw Assembly
74
Reactor Assembly
75
#10 - 32 Hex Nut
-#1 0 3 2 Hex. Lock Nut
- #1 0 3 2 x 3/ 8 Pan Hd. Screw
76 77
Electrical Separable Connector Housing
78
#6 - 3 2 x 7 2 Fil. Hd. Screw
79
#6 Internal Tooth Lockwasher
82
#6 - 3 2 Hex Nut
83
Fixed Jack Screw - Female, with lockwasher and 84a
nut
84b
Fixed Jack Screw Male, with lockwasher and nut 85
#4 External Tooth Lockwasher (furnished with
Items 49 & 50)
86
#4 - 40 Nut (furnished with Items 49 & 50)
Connector Mounting Plate
87
VA - 28 x Vi Hex Cap Screw
88
Handle, Contactor
89
Clamp, Tube
90
#10 - 32 x Vi Pan Hd. Screw Assembly
91
5/ 1 6 - 1 8 x 1 Hex Socket Button Hd, Seif -Locking 92
Cap Screw
- 5/ 1 6 1 8 Hex Nut
93 94
Top Support
95
Spring Washer
96
Loctite, Grade A ( Loctite Corp #88)
97
Operating Shaft Assembly, including Contact Arm 98
Assembly, Spring, Pins, and Retaining Rings
99
Spring (part of Item 63)
100
Contact Tip (Kit containing 6 contact tips with
101
mounting hardware)
102
3 / 8 - 16 x 1-1/ 8 Hex Screw
103
3 / 8 Spring Washer
104
3/ 8 Wa5her , Plain
105
Vi - 13 x 17? Hex Screw
106
Vi Washer, Plain
107
Vi Plain Lockwasher
108
Vi - 13 Hex Nut
Stationary Contact Base Assembly, including
109
Base, Bracket , Contact Clip, Contact Tip, Blowout 110
Coil and Ears, Washers, and Disconnect
111
Assembly
112
113
A51033-042-51
21410-16200
C51033-406-50 21401-24400 23601-00242 A51033-410-01 D51033-506-01
B51033-507-01 B51033-526-50
B51033-525-51
A51033-413-01 21911-17120 D51033-382-50 A51033-383-01
851033-387-50 21401- 24240
A51033-073-50 A51033-076-01 23045- 22000
A51033-022-01
B51033-439-01 B51033-438-50 23002-00200 A51033-320-01 C51033- 447- 50 A 51033- 453-01
23601-00220
C 51033- 441- 50
24209-16640
23201-00170 PJC-7201 AMP # 305183
21401-22200
21401-24200
B51033-575-50 A51033-567-01 A51033-568-01
Description
Disconnect Assembly (part of Items 73 and 76) (includes Item 75)
- #10 24 x 5/8 Hex Hd. Tap Screw (part of Items
73, 74 & 76) Power Fuse Bus Assembly (includes Item 74) 3/ 8 - 1 6 x 1 7 4 Hex Screw 3/ 8 Washer , Plain Clamping Bar Fuse Clip Fuse Clip, Spring Fuse Stop Bracket with Control Fuse Clip Fuse Stop Bracket without Control Fuse Clip Power Fuse, Refer to wiring diagram supplied with specific equipment.
Control Transformer Fuse, Refer to wiring diagram supplied with specific equipment. Fuse Retainer Spring
- #10 32 x 3/ 8 Pan Hd. Screw Assembly
Pedestal Assembly Contact Clip
. Connector Assembled ( 400 Amps)
3/ 8 - 16 x VA Hex Screw Arc Chute, Assembled
Barrier
5 /1 6 - 1 8 Heavy Hex Jam Nut (part of Item 63) Adjusting Screw (part of Hem 63) Third-Stab Bracket Third-Stab Bus
74 20 Hex Nut Jumper (Front Bus Assembly) Mechanical Latch Assembly Adjustment Plate
5 /1 6 Washer, Plain Electrical Release Assembly VA x 2 Slotted Spring Pin #10 Plain Lockwasher Disconnect Stab Lubricant Extraction Tool. Order from AMP Incorporated, Harrisburg, Pennsylvania 17105
5 / 1 6 - 1 8 x 5/8 Hex Screw 3 / 8 - 1 6 x 5/8 Hex Screw Adapter for T' power fuse (Not Shown)
Contactor Pm Contactor Pin
®
SQUARE COMPANY
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