Siemens 456 User manual

SIEMENS,
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. IN ··5 T Rue T ION 5
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.• CC603~
. . 20X975&-11
.-:; February.
191

TABLE OF CONTENTS
Page
GENERAL INFORMATION .................................................. 2
Introduction . .............................................................. 2
General Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 2
Contactor Ratings ......................................................... 2
RECEIVING, UNLOADING AND UNPACKING .............................. 3
Storing ................................................................... 3
INSTALLATION ............................................................ 3
Mounting
................................................................. 3
Electrical Connections ..................................................... 3
OPERATION ................................................................ 4
Pre-Energization Check .. ......................... , ........................ 4
Operating Data ............................................................ 4
Control Circuit Diagrams
.................................................. 4
MAINTENANCE
............................................................ 4
Arc Chute and Phase Barrier Removal/lnstallation . _ ......................... 4
Main Contact InspectionlReplacement ....................................... 5
Magnet Coil Replacement
.................................................. 5
Auxiliary Contact
Adjustment.. . . .. . . .. .. . .. . . . . . . . .. . .. . . . . .. .. .. . . .. . .... 5
Arc Chute InspectionIMaintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 5
Periodic Cleaning .......................................................... 5
Recommended Torque Values
............................................... 6
TROUBLE SHOOTING ...................................................... 6
Trouble Shooting
Chart .................................................... 7
PARTS LIST ................................................................ 9
Type 456 Air-Break Contactor
.. . . . . . . . . .. . .. . .. . . . . . .. . . .. .. .. .. . . . . .. . . ... 9
Main Contact Replacement
Kit ........................................... 12
Arc
Chute Replacement Information ........................................ 12
Type 456-D Dynamic Braking Contactor
.................................... 13
The information contained within is intended to assist operating personnel
by providing information on the general characteristics of equipment of this
type. It does not relieve the user of responsibility to use sound Practices and
Safety Procedures in the installation, application, operation and mainte-
nance of the particular equipment purchased. This instruction book is not a
training manual for unskilled persons.
If drawing. or other .upplementary instructions for Bpecific applications are
forwarded with this manual or separately, they take precedence over any con-
flicting or incomplete information in this mlUlual.
-1-
.....

(
GENERAL INFORMATION
Fig. 1 - Type 456 AC Air-Break Contactor
INTRODUCTION
The Type 456 5KV AC air· break contactor is designed
primarily for general alternating current motor starting
applications. It is particularly suited for applications re-
Quiring frequent starting, reversing, plugging or dynamic
braking.
CONTACTOR RATINGS
~A
GENERAL DESCRIPTION
The basic contaetor is of compact design. 24 in. deep. 16
in. wide,
and 28 in. high. The contacts are double break and
have a contactangleof45degrees which facilitates natural
arc movement into the arc chute. This angle also provides a
wedging action fOT higher effective contact pressure. Dust
and dirt slide otT.
The accessibility of the contactorallows fast and conven-
ient inspection and testing. The Type 456 contactor fea-
tures lift out arc chutes. Hinged blow-out pole pieces swing
back to expose all contacts for quick inspection and re-
placement.
The supporting base is of cast aluminum. The pushrods,
contact support blocks and other insulating parts are con-
structed of glass polyester. All insulation in contact with
high voltage current carrying parts is flame retardant and
track resistant.
An auxiliary contact panel assembly for magnet opera-
tion consists of a silicon rectifier. three NO - NC auxiliary
switches and one NC long wipe switch which are mounted
on an aluminum plate. The auxiliary switches are operated
by an auxiliary drive link from the magnet armature.
The stationary contact ~ssemblies are mounted on a
glass polyester support bh.l.;r. along with the blowout coil
assemblies.
One terminal of each blowout is connected to
the stationary contact assembly.
Maximum Horsepower
Enclosed
4OO()'5000 Volts
No.
Continuous
Interrupting
220()' 2500 vons
ot Ampere
capacity at
Synchronous
Impulse
Synchronous
Impulse
Poles Rating 8 Hr.
Induction
level
Induction
level
Basis
220()'
400()'
2500V 5000V
1.0pt
.Bpt
(BIL)
1.0pt
.Bpt
(Bll)
3 360
50,000
50,000
1750 1500 1500
60~
3000 2500 2500
6O~
Auxiliary Contacts: Each contactor is equipped with 2 N.O. and 3 N.C. extra auxiliary contacts rated 6DDV, 1DA (NEMA Class
A6DD). A third (3rd) N.O. is used to energize the contacto(s magnet. See Circuit Diagrams page 4.
. ,

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RECEIVING, UNLOADING
AND UNPACKING
Air break contactors are shipped completely assembled.
To unpack, remove
the cardboard shipping carton, then
remove the screws holding the contactor to the wooden
platform
and lift the contactor from the platform. Refer to
Figure 2 for recommended lifting method.
•• >PE
SUHIi
1
2O"APPRQI(.
J
Fig. 2 - Recommended Lifting Method
NOTE: If any signs of damage are apparent, file a claim
immediately with the transportation company and notify
your Siemens-Allis Sales Office. As much identification as
possible should accompany the claim with a description of
the damage.
STORING
If the contactor can be set up immediately in its perma-
nent location, it is advisable to do so, even though it may
not be placed in operation for some time, Contactor should
bestoredindoors in a clean dry dust~free heated area where
condensation cannot OCCur.
INSTALLATION
GENERAL
Installation shall be in accordance with the National
Electrical Code, ANSI, and NFPA 70 Standards.
• •
MOUNTING
The contactor should be installed in a clean dry heated
place with good ventilation. It should be readily accessible
for
cleaning and inspection and should be carefully set up
and leveled on its supporting foundation and secured in
place.
All
adjustments have been made at the factory before
shipping and generally no change is required. See that all
contact surfaces are clean and smooth, and that current.
carrying parts are not damaged,
ELECTRICAL CONNECTIONS
Inspect all insulated wiring to see that no damage has
resulted from installing the contactor. Test the high volt-
age wiring for possible grounds or short circuits.
WARNING: Dielectric testing is hazardous, and should be
conducted only by trained personnel. Refer to test device
instructions for safety precautions.
A
high potential test at 2% times the nominal system
voltage plus 2000 volts applied for one minute between
phases and from all phases to ground is the preferred
method. Be sure to disconnect any devices (control power
transformer, etc.) from the circuit which could be dam-
aged by the test voltage. If a hi-pot tester is unavailable,
then a Megger test at 1000 volts is a suitable second
choice. -
Make sure that all current-carrying parts outside the
contactor have adequate current-carrying capacity and
are correctly insulated in accordance with the require-
ments of the National Electrical Code (NEC)' All electri-
cal connections should be made carefully per furnished
wiring diagram. Tighten all lugs to recommended torque
values. If crimp lugs are supplied, use recommended tools
only. IMPORTANT:To
obtain correct magnetic actionfrom
blowouts, connect
the load wires (motorI furnace, etc.) to
the terminals on the rear of the blow-out coils. (Refer to
Figure 3.).
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Fig. 3 - Location of Line and Load Terminals

u
OPERATION
PRE-ENERGIZATION CHECK
WARNING: Perfonn the following checks before energiz-
ing the high voltage circuit:
1. Be sure all arc chutes are correctly installed and both
phase harriers are in place.
2. Operate the contactor by hand to be sure that all parts
move freely. If the contactor has been stored for some
time, clean
any excessive amounts of dust and dirt that
may have accumulated.
3. Connect only control power and operate the contactor
electrically several times. At 85 to 110% of rated con·
trol voltage (see operating data), the contactor should
pick-up and seal cleanly with no pumping or chatter-
ing.
The contactor may nowbeplaced in serviceby connecting
main incomingcables. The contactor must be appropriately
guarded or isolated before energizing the high voltage cir-
cuit. Operating characteristics ofcontactors which are in-
stalled in SpaceMaker-II carriages are described in sepa-
rate instruction book ICD 6031.
OPERATING DATA
23l 110. 115 von
250 1'0'
125 Volt
AC SUpply AC Supply DC Supply
DC ..... "
Rated control vollage
23l " ..
115 volts 250 volts
125 VOltS
....... -
lSO volts
80 volts
160 vollS
85" ..
--
......
so ....
.. " ..
SO" ..
t',CK-vp time
12-13 cycles 13 cycles
1HyCils 13-'.
cycleS
(to txmUiCS touch)
'" Fast drop-out lime
.. ,"""
4-S cyCles 4-Sc,cIes ...5 r:ycI!$
",,,,,,,,,,-
* Mormal d~ut time
,.." """
25-3S cyCles
--
"' ""'" -
Normal mNSh cunent
5.01. 10.01. 3.51.
1.01.
M&umum Wush cunent
6.51.
13.01.
..Sa.
9.01.
Normal seMng cunent
.,.
0 .... O.lla
0.261.
MaxImum sealing current 0.252. O.sa.
O.lSa.
0.3011.
*Drop-out times shown in above table are not total clearing
times. Contactor clearing time is equal to drop-out time
plus arcing time. Arcing times vary depending on voltage
and current being interrupted.
CONTROL CIRCUIT DIAGRAMS
"
J.. ...
T
•
,
•
••
.. ..
p-- lIES
"'l
• 'L·-g;.!..._fl--'{
........
115 OR 230 VOLT
AC SUPPLY
"
125 OR 250 VOLT
DC SUPPLY
MR -MasterControl Relay Contact (remote from con-
tactor), contact rating designation to be NEMA
A600.
• MR Contact between terminals Rand S on AC oper-
ated contactor is used to achieve fast drop-out time
shown in above table. For normal drop-out time, con-
nect a jumper wire between Rand S.
•• Panel mounted resistor required only on two-pole
contactors.
MAINTENANCE
The customer should establish a periodic maintenance
program, The frequency of inspection, periodic cleaning
and preventive maintenance schedule willdepend upon the
operating conditions, NFPA Publication 70B "Electrical
Equipment Maintenance" may be used as a guide to estab-
lish such a program. The following items should be in-
cluded on
any comprehensive maintenance check list:
~--------------WARNING---------------,
CONTACTOR MUST BE DISCONNECTED FROM
ALL POWER SOURCES BEFORE PERFORMING
ANY INSPECTION, MAINTENANCE OR REPAIR.
ONLY QUAUFIED PERSONNEL FAMIUAR
WITH ELECTRICAL EQUIPMENT AND THE
HAZARDS INVOLVED SHOULD BE PERMIT-
TED TO SERVICE THIS EQUIPMENT_
ARC CHUTE AND PHASE BARRIER
REMOVAL AND RE-INSTALLATION
Refer to Figure 4
To remove
an arc chute, lift the back end of the chute
until it releases, then lift the entire chute upward, slide
forward and out.
To re-install an arc chute, slide in rear of arc chute first,
then push front arc runner clip down over front stationary
contact until notches in front of chute fit into mating
grooves in contactor insulator block. Now push rear of arc
chute down so that rear arc runner clip engages over rear
stationary contact. When properly seated, horizontal
grooves on sides of arc chute should line up with top of
blow-out plates.
The two phase barriers may be removed by lifting
straight up, then sliding forwarn ".nd out. To re-install,
reverse this procedure making sure that notches in bal ~ iers
face to the rear (load) side of the contactor.
WARNING: DO NOT ENERGIZE CONTACTOR UN-
LESS ARC CHUTES AND PHASE BARRIERS ARE IN-
STALLED.
Flg_ 4 - Arc Chute aod Phase Barrier· Installation

MAINCONTACTINSPECTION AND REPLACEMENT
All main contacts are made from a material specially
suited for making and breaking high electrical currents
while resisting welding and erosion due to arcing. The
contacts are brazed to a copper alloy base material which
serves to supportthem, C8rr)' electrical current and conduct
heat away. This base material is subject to erosion and
welding if exposed to arcing; therefore contacts must be
replaced when the contact material is worn nearly to the
point ofexposing the base material. Asa guide, the contacts
should be replacedwhen approximately 3/32 inch of contact
material has been eroded away.
CAUTION: Contacts must be replaced before any part of
one contact makes contact with the base material of its
mating contact.
The interval between inspections will vary with the na-
ture ofthe load being switched. It is recommended that the
contacts be inspected after the first 1,000operations. If only
minor pitting is observed, then the inspection interval can
be increased. Evidence of heavy pitting and erosion of con-
tact material means the contacts should be checked more
frequently to
detennine if the wear allowance of3/32 inch is
being approached.
Refer to
Figure 9
When contacts require
replacement, replace contacts (3)
and (35) and springs (32) on all three phases at the same
time. To gain access to all contacts, remove two phase
barriers and all three arc chutes (14). Then swing back
hinged blowout coil assemblies. All main contacts are now
accessible for replacement.
Remove
hex lock nuts (80) allowingcap screws(74) to slip
out ofpushrod (28) Movable contact (35) is now accessible
for replacement.
First remove movable contact assembly. Remove hex
head nut with lockwasher (85) (84). Stationary contact (3)
may now be removed for replacement.
MAGNET COIL REPLACEMENT
Refer to Figure 9
Remove wire oonnections from coil. Loosen
hex head
machine screw (89). Slide magnet assembly from the base
of the yoke(16). Machinescrew(89) along with magnet core
(17)
can then be liftedfrom coil along with washers (18) (19)
(20) (21) (94). Replace coil and reassemble following the
reverse procedure.
AUXILIARY CONTACT ADJUSTMENT
Refer to Figure 9
Tighten auxiliary drive link (39) to coupling angle (46)
just enough to remove excessive free play. Do not over-
tighten.
ARC CHUTE INSPECTION AND MAINTENANCE
The arc chutes should be inspected as part of routine
maintenance each time the contacts are inspected. In ser-
vice, the arc chute ceramicwill become discolored slightly
due to nonnal arcing as the contactor operates. Dust and
dirt will also tend to accumulate after a period of time. The
following procedure should be used to clean the arc chutes
after they have been removed from the contactor:
1.
Blowout dust and dirt by directing dry compressed air
from the bottom of the arc chute up through the spaces
between the ceramic arc splitters. The air should also be
directed over the surfaces of the ceramic flash plates
located in th~ lower ponion of the chute <refer to Figure
5). •
2.' Using a cloth or by light sanding, remove any additional
loose residue (carbon, etc.) from the flash plates. Pay
particular attention to the areas which have vertical
grooves on the ceramic surface. Do not use abrasives
which might embed conducting particles in the ceramic
(emery cloth. wire brush. etc.).
CERAMIC ARC
SPLITTERS
CERAMIC
FLASH PLATES
)
Fig. 5
In addition to periodic cleaning, the arc chutes should be
inspectedfor any obvious physical damage such as cracked
or missing ceramic pieces. Small chips or slight cracks in
the ceramic should not cause concern as long as no large
pieces are missing or are in danger of falling out of the
assembly. If any components require replacement, the
complete arc chute assembly must be replaced.
CAUTION: When replacing arc chutes, refer to important
ordering information at the end of this manual.
After prolongedperiodsof operation at medium-ta-heavy
currents or after the contactor has been required to inter-
rupt at or near its full 50MVA rating, heavy electrically
conductive deposits may accumulate on the flash plates
which would interfere with proper contactor operation. In
the event of this, it is recommended that a dielectric or
Megger test be perfonned as follows to verify dielectric
strength of the flash plate sufaces. If a Megger is used, the
recommended test voltage is 1000 volts.
WARNING: Dielectric test voltages are hazardous. Refer
to test device instructions for safety precautions.
1. Clip Megger or dielectric tester leads onto the flash
plates at the points shown in Figure 6 using alligator
clips or the equivalent.
2. The area between the clips should withstand 9KV
AC(13KV DC) for one minute or should indicate a resis-
tance of at least 100 Megohms. Be sure to test both left
and right sides of the arc chute. If either side fails to
meet the dielectric requirement. then disassembly and
cleaning is necessary before placing the arc chute back
into service. If one arc chute fails the test, then disas-
sembly
and cleaning of all three arc chutes is recom~
mended.
PERIODIC CLEANING
Accumulation of dust and foreign material such as coal
dust, cement dust or lamp black must be blown ofT the
contactor, all surfaces must be wiped clean at regular in-
tervals. Dust can collect moisture, causing voltage break-
down.

RECOMMENDED TORQUE VALUES
When making bolted assemblies, the following consider·
atian should be generally followed. The tightening torques
are determined
by the size of hardware used.
1. Metal-to-Metal- Apply standard tightening torque as
listed:
Thread Size
8-32
10-32
114-20
5/16-18
3/8-16
112-13
Torque (In.-Lb.l
14- 20
20- 30
40- 60
168-228
240-360
480-600
2. Metal-to-Insert Molded in Compound Part -Apply ap-
proximately 2/3 of standard tightening torque.
3. Compound-to-InsertMolded in Compound Part -Apply
approximately
112 of standard tightening torque.
4. Compound-to-Compound -Apply
approximately 112 of
standard tightening torque.
DISASSEMBLY AND CLEANING OF ARC CHUTES
CAUTION: Arc chute disassembly should be performed
only if the dielectric test described in these instructions was
not passed.
Disassembly Procedure (Refer to Figure 7)
1. Lay the arc chute on its side.
2. Rernove the hardware which attaches the two arc chute
halves at four locations marked (1) in the figure.
3. Loosen, hut do not remove, the four 8rc runner attach-
ment screws marked (2).
4. Carefullylift otT oneof the arc chute halves to expose the
ceramic barrier stack and the arc runner and clip as-
semblies. Refer to Figure 8.
5. Remove the barrier stack and the arc runners.
6. Clean the ceramic flash plates on the bottom of the arc
chute halves by dry nonconductive sandblasting. After
sandblasting, all of the dark colored deposits should be
removed and the ceramic sulfaces should appear white.
7. Wipe otT the arc chute halves with a dry cloth and reas-
semble the arc chute by reversing the disassembly pro-
cedure.
The ceramic barrier stack can be installed either
way but the "V" notches in the splitter plates must be
toward the bottom.
8. Repeat the dielectric test to ensure that dielectric
strength has beenrestored to the flash plate surfaces, in
which case the arc chutes can now be returned to ser-
vice.
It is recommended that disassembly and sandblasting of
the arc chute be done no more than three (3) times during
the service life of any arcchute. Mter this point,otherparts
of the arc chute may have become contaminated to the
extent that performance is degraded and the entire arc
chute should be replaced.
CAUTION: Refer to "IMPORTANT INFORMATION
WHEN REPLACING ARC CHUTES" at the end of this
manual.
Fig. 6
Fig. 7
CERAMIC BARRIER
S·.-ACK
\
f
'. 0"
TROUBLE SHOOTING
In the unlikely event that operating problems are en~
countered, use the following trouble-shooting chart to iso-
late the cause of the malfunction and find the remedy. If the
corrective action given in the chart fails to correct the
difficulty, consult your field sales representative.
lfit is necessary to write to Siemens-Allis relative to the
equipment, the following information should be given:
1. Manufacturer's order number,
if available.
2. Nameplate data on contactor.
3. Duty cycle and any details of operation.
4. Length of time in serviceand approximate total number
of operations.
5. Voltage, current
and frequency.
6. Description of problem.
7. Any other pertinen.t information.

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TROUBLE SHOOTING CHART
WARNING
REMOVF ALL POWER TO CONTACTOR PRIOR TO MAKING THESE CHECKS EXCEPT WHERE
CONTROL POWER IS REQmRED AND EXERCISE CAUTION AT ALL TIMES.
TROUBLE CAUSE REMEDY
CONTACTS Overload. Reduce current load.
Overheating
Insufficient contact
Clean contact surfaces.
of contacts. pressure. Replace contact springs
if weak andlor replace
contacts if wear allow-
ance of 3132" per con·
tact is used up.
Loose connection. Check and tighten power
connections.
Contact chatter
Poor contact in control Check
all connections in
or pumping. circuit. control circuit for
tight
a
ness.
Improper functioning
The N.O. contact of "M
in parallel with the N.C.
of long wipe contact L.W. contact
must close
(between T & S in con- before L.W.
contact
tactor coil circuit). opens.
If this sequence is
not followed check for
worn contacts and physi.
cal damage of pole as·
sembly (47 and 48); also
check
leaf spring drive
(41)
for mechanical
damage.
Fluttering control relay Properly adjust switch or
such as pressure or tern· replace.
perature switch.
Abnormally low control Measure control voltage.
voltage. Voltage must be at least
85% of rated value shown
in OPERATING DATA.
Open coil Check continuity
of coil
and replace
if defective.
Short contact Bounce on closing. Check operating voltage.
life. Should not exceed
rated
voltage by more than 10%.
Improper seating
Refer to Arc Chute in-
of arc runners. stallation instructions.
Low voltage; magnet
Measure control volt-
not sealing. age. Voltage
must
be at least 85% of
rated value shown in
OPERATING DATA.
Fluttering control Properly adjust switch
relay such 8S pres- or replace.
sure or temperature
switch.
-
Excessive jogging Check application.

TROUBLE SHOOTING CHART (CONT'D)
WARNING
REMOVE ALL POWER TO CONTACTOR PRIOR TO MAKING THESE CHECKS EXCEPT WHERE
·'
L
CONTROL POWER IS REQUIRED AND EXERCISE CAUTION AT ALL TIMES.
TROUBLE
CAUSE REMEDY
Short Contact. Foreign materials Remove
Life in operating or con·
tact mechanisms.
Welding Inadequate contact Replace contacts
if
of contacts. pressure. wear allowance is ex-
ceeded. Replace con-
tact pressure springs.
Fluttering control Properly
adjust switch
relay such as pres- or replace.
sure or temperature
switch.
Low control voltage, Measure voltage to de-
cantactor dropping
tennine if abnormally
partially open. low dips in voltage
occur, particularly
during motor start-up.
Mechanical interference. Check for mechanical
binding and adjust.
---
Misadjustment of me- Adjust mechanical in-
chanical interlock for
terlock. Refer' .
contactors installed in SpaceMaker-ll
i~stl'Uc-
SpaceMaker controller. tion book ICD
603l.
COlIJRECTlFIER Failure of
magnet
Check for mechanical bind-
armature to close.
ing of contactor.
Burned-Out Fluttering control
Properly adjust switch
coil or rectifier relay such
as pres- or replace.
sure or temperature
switch.
Mechanical inter- Adjust. Refer to
lock interference. SpaceMaker-1I instruc-
tions ICD 603l.
Failure of long wipe Check
leaf spring drive
contact to open. (41)
and pole assembly
(48) for mechanical da-
mage.
Control voltage too Measure voltage. Volt-
high. age should not exceed
rated voltage by more
than 10%
.
High ambient tempera- Ambient temperature out-
ture. side contactor enclosure
should not exceed 40·C.
,

------_._-_ ..
PARTS LIST
TYPE 456 AIR-BREAK CONTACTOR
Control Number Part Number
Voltage of Poles BasIc Contactor wIth Wheels
115 VAC 3 25-125-248-503
115 VAC 2 25-125-248-504
230 VAC 3 14-514-449-501
230 VAC 2 14-514-449-506
230 VAC 3 14-519-296-501 t
t Spnng closed Dynrumc Brakmg Contactor, furnIshed less wheels.
REFER TO FIGURE 9
PARTS LIST -BASIC TYPE 456 CONTACTOR - 2 OR 3 POLES
ITEM DESCRIPTION OTY OTY PART NUMBER
3 - POLE 2 - POLE
1 Frame 1 1 14-422-858-001
2
Stationary Contact 6 4 14-141-684-001
3 Stationary Contact Insert 6 4 14-147-051-501
4
Stationary Contact Support-Front
1 1 14-227-877-501
5 Stationary Contact Support-Rear 1 1 14-317-577-501
6 Support
Bar 3 2 25-120-957-002
7 Blowout Coil 3 2 25-205-568-801
8 Blowout Core 3 2 14-230-679-501
8A Fishpaper Insulator 6 4 14-422-046-007
9
B1Qwout Plate -R.H. 3 2 14-142-286-501
10 Blowout
Plate -L.H. 3 2 14-142-286-502
11 Blowout Coil
Washer 6 4 14-133-782-001
12 Arc
Chute Support 3 2 14-231-654-001
13 Phase Barrier 2 -14-133-795-001
14 Arc
Chute Assembly* 3 2 25-131-017-502
15 Stop 1 1 14-170-322-001
16
Magnet Yoke Assembly 1 1 14-319-712-501
17
Magnet Core 1 1 14-142-161-001
18 Neoprene Washer 1 1 14-129-241-023
19
Plastic Washer
1 1 14-145-664-001
20 Steel Washer
1 1 14-179-558-001
21
Stainless Steel Washer 1 1 14-171-157-013
22
Shim .015 thick 2 2 14-133-780-002
23
Stationary Pivot Seat 1 1 14-145-322-001
24
Spring 2 2 14-145-712-001
25 Pivot Bar 1 1 14-230-539-001
26 Movable Pivot Seat 1 1 14-145-321-001
27 Movable Contact Carrier 1 1 14-321-927-002
28 Contact Push Rod 3 2 14-227-879-002
29
Bearing Pin Assembly 1 1 14-170-557-501
30
Barrel Nut
1 -14-145-379-002
31 Bearing Pin 1 1 14-145-379-001
32 Contact
Pressure Spring 3 2 14-145-668-001
33
Spring Saddle 3 2 14-142-157-001
34 Movable Contact Guide 3 2 14-141-685-001
35 Movable Contact Assembly 3 2 14-227-873-501
36 Contact
Ann
1 1 14-321-928-002
37 Bearing 2 2 14-123-887-004
38 Auxiliary Contact Actuator
Ann
1 1 14-147-033-001
39 Auxiliary Contact Drive Link 1 1 14-170-324-001
• - Refer to "IMPORTANT INFORMATION WHEN REPLACING ARC CHUTES", Page 12.