Powell SM-1500 User manual

SM-1500
Motor Cuto Switch Assembly
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Motor Cuto Switch Assembly SM-1500
Contact Information
Powell Electrical Systems, Inc.
www.powellind.com
[e-mail]
Service Division
PO Box 12818
Houston, Texas 77217-2818
Tel: [phone]
Fax: [phone]
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SM-1500
Signal Words
As stated in ANSI Z535.4-2002, § 4.13-4.13.3 the
signal word is a word that calls attention to the
safety sign and designates a degree or level of
hazard seriousness. The signal words for product
safety signs are “Danger”, “Warning”, and
“Caution”. These words are defined as:
DANGER indicates an imminently hazardous
situation which, if not avoided, will result in
death or serious injury.
DANGERDANGER
!
WARNING indicates a potentially hazardous
situation which, if not avoided, could result in
death or serious injury.
WARNINGWARNING
!
CAUTIONCAUTION
!
CAUTION indicates a potentially hazardous
situation which, if not avoided, may result in
minor or moderate injury.
Not stated in ANSI Z535.4-2002, § 4.13-4.13.3
as a signal word but used in this manual is
“IMPORTANT”. This is defined as:
IMPORTANT indicates a section of the manual
covering a non hazardous situation, but
one where Powell feels proper attention is
warranted.
IMPORTANTIMPORTANT
!
Qualified Person
For the purposes of this manual, a qualified person,
as stated in NFPA 70®, is one familiar with the
construction and operation of the equipment and
the hazards involved.
In addition to the above qualifications, one must
also be:
1. trained and authorized to energize,
deenergize, clear, ground, and tag circuits
and equipment in accordance with
established safety practices.
2. trained in the proper care and use of
personal protective equipment (PPE)
such as rubber gloves, hard hat, safety
glasses or face shields, flash clothing, etc.,
in accordance with established safety
practices.
3. trained in rendering first aid if necessary.
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SM-1500
Contents
Figures
Ch 1 General Information ................................................................................................1
A. Sc o p e ...............................................................................................................................................................2
B. pu r p o S e ............................................................................................................................................................2
Ch 2 Safety .......................................................................................................................3
A. SA f e Wo r k co n d i t i o n .........................................................................................................................................3
B. SA f e t y Gu i d e l i n e S ...............................................................................................................................................3
c. Ge n e r A l ............................................................................................................................................................4
d. Sp e c i f i c .............................................................................................................................................................4
e. X-rA y S .............................................................................................................................................................5
f. SA f e t y lA B e l S ....................................................................................................................................................5
Ch 3 Equipment Description ............................................................................................6
A. Ge n e r A l ............................................................................................................................................................6
Ch 4 Installation ...............................................................................................................7
A. re m o v i n G t h e ol d mo t o r cu t o f f SW i t c h AS S e m B l y A n d in S t A l l i n G t h e re p l A c e m e n t mo t o r cu t o f f SW i t c h AS S e m B l y . 7
1) Removing the Old Motor Cutoff Switch Assembly .......................................................................................................... 7
2) Installing the New Motor Cutoff Switch Assembly into the Circuit Breaker .............................................................. 8
Figure 1 Motor Cutoff Switch Assembly .......................................................................6
Figure 2 Motor Cutoff Switch Assembly Installed ........................................................7
Figure 3 Removing Hex Head Bolts ..............................................................................7
Figure 4 Cut Tie Wrap Holding Wire Harness to Motor Cutoff Switch Wires ...............8
Figure 5 Disconnect Wires from Motor Cutoff Switch .................................................8
Figure 6 Installing the Motor Cutoff Switch Assembly onto the Circuit Breaker ........9
Figure 7 Reconnect Wires to Motor Cutoff Switch .......................................................9
Figure 8 Tie Wrap Wire Harness ...................................................................................9
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ii
Motor Cuto Switch Assembly SM-1500
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Ch 1 General Information
Powell reserves the right to discontinue and to change specifications at any time without incurring
any obligation to incorporate new features in products previously sold.
IMPORTANTIMPORTANT
!
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General Information
SM-1500
WARNINGWARNING
!
The equipment described in this document may contain high voltages and currents which can
cause serious injury or death.
The equipment is designed for use, installation, and maintenance by knowledgeable users of such
equipment having experience and training in the field of high voltage electricity. This document
and all other documentation shall be fully read, understood, and all warnings and cautions
shall be abided by. If there are any discrepancies or questions, the user shall contact Powell
immediately at 1.800.480.7273.
WARNINGWARNING
!
Before any adjustment, servicing, part replacement, or any other act is performed requiring
physical contact with the electrical working components or wiring of this equipment, the power
supply must be disconnected. Failure to follow this warning may result in injury or death.
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2General Information
Motor Cuto Switch Assembly SM-1500
A. Sc o p e
The information in this maintenance procedure
describes the following Motor Cutoff Switch
Assembly:
• 50756G03P
This device can be used in the following circuit
breakers:
• PowlVac®STD
• PowlVac®CDR
• PowlVac®ASD
• PowlVac®38kVCDR
B. pu r p o S e
The information in this maintenance procedure
is intended to provide information required
to properly install the motor cutoff switch
described in Ch 1 General Information,
A. Sc o p e .
This instruction bulletin provides:
1. Safety guidelines
2. Instructions for installation and placing the
motor cutoff switch assembly into service
3. Procedure for critical adjustments
4. Illustrations, photographs, and description
of the motor cutoff switch assembly
The illustrations contained in this document
may not represent the exact construction
details of each particular type of motor cutoff
switch assembly. The illustrations in this
document are provided as general information
to aid in showing component locations only.
All photos and illustrations are shown using
deenergized equipment.
Be sure to follow the appropriate safety
precaution while handling any of the
equipment. Failure to do so may result in
serious injury or death.
WARNINGWARNING
!
To the extent required, the products described
herein meet the applicable ANSI, IEEE, and
NEMA Standards; however, no such assurance
is given with respect to local codes and
ordinances which may vary greatly.
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Safety
SM-1500
Ch 2 Safety
A. SA f e Wo r k co n d i t i o n
The information in Section A is quoted from
NFPA 70E 2004 - Article 120, 120.1 Establishing an
Electrically Safe Work Condition.
120.1 Process of Achieving an Electrically Safe
Work Condition
1. Determineallpossiblesourcesofelectrical
supply to the specific equipment. Check
applicable up-to-date drawings, diagrams,
and identification tags.
2. After properly interrupting the load current,
OPEN the disconnecting device(s) for each
source.
3. Wherever possible, visually verify that all
blades of the disconnecting devices are
fully OPEN or that drawout type circuit
breakers are withdrawn to the fully
disconnected position.
4. Apply lockout/tagout devices in accordance
with a documented and established policy.
5. Use an adequately rated voltage detector
to test each phase conductor or circuit part
to verify they are deenergized. Test each
phase conductor or circuit part both
phase-to-phase, and phase-to-ground.
Before and after each test, determine
that the voltage detector is operating
satisfactorily.
6. Where the possibility of induced voltages
or stored electrical energy exists, ground
the phase conductors or circuit parts
before touching them. Where it could be
reasonably anticipated that the conductors
or circuit parts being deenergized
could contact other exposed energized
conductors or circuit parts, apply ground
connecting devices rated for the available
fault duty.
B. SA f e t y Gu i d e l i n e S
Study this maintenance procedure and all other
associated documentation before installing the
undervoltage device.
Each user has the responsibility to instruct
and supervise all personnel associated with
usage, installation, operation, and maintenance
of this equipment on all safety procedures.
Furthermore, each user has the responsibility of
establishing a safety program for each type of
equipment encountered.
It is mandatory that the following rules be
observed to ensure the safety of personnel
associated with usage, installation, operation,
and maintenance of these circuit breakers.
The safety rules in this instruction bulletin are
not intended to be a complete safety program.
The rules are intended to cover only some of the
important aspects of personnel safety related to
the motor cutoff switch assembly.
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4Safety
Motor Cuto Switch Assembly SM-1500
c. Ge n e r A l
1. Only supervised and qualified personnel
trained in the usage, installation, operation,
and maintenance of the circuit breaker shall
be allowed to work on this equipment. It
is mandatory that this instruction bulletin,
any supplements, and service advisories be
studied, understood, and followed.
2. Maintenance programs must be consistent
with both customer experience and
manufacturer’s recommendations,
including service advisories and instruction
bulletin(s). A well planned and executed
routine maintenance program is essential
for circuit breaker’s reliability and safety.
3. Service conditions and circuit breaker
applications shall also be considered in the
developmentofsafetyprograms.Variables
include ambient temperature; humidity;
actual continuous current; thermal cycling;
number of operations; interrupting duty;
and any adverse local conditions including
excessive dust, ash, corrosive atmosphere,
vermin and insect infestations.
d. Sp e c i f i c
1. DO NOT WORK ON AN ENERGIZED
CIRCUIT BREAKER. If work must be
performed on a circuit breaker, remove it
from service and remove it from the
metal-clad switchgear.
2. DO NOT WORK ON A CIRCUIT BREAKER
WITH THE CONTROL CIRCUIT ENERGIZED.
3. EXTREME CARE MUST BE EXERCISED
TO KEEP ALL PERSONNEL, TOOLS, AND
OTHER OBJECTS CLEAR OF MECHANISMS
WHICH ARE TO BE OPERATED,
DISCHARGED, OR RELEASED. These
circuit breakers utilize stored energy
mechanisms. These mechanisms must be
serviced only by skilled and knowledgeable
personnel capable of releasing each spring
loadinacontrolledmanner.Detailed
information regarding these mechanisms is
found in this instruction bulletin.
4. DO NOT ATTEMPT TO CLOSE THE CIRCUIT
BREAKER MANUALLY ON AN ENERGIZED
CIRCUIT.
5. DO NOT USE AN OPEN CIRCUIT BREAKER
AS THE SOLE MEANS OF ISOLATING A
HIGH VOLTAGE CIRCUIT. For complete
isolation, the circuit breaker shall be in
the disconnected position or shall be
withdrawn completely.
6. ALL COMPONENTS SHALL BE
DISCONNECTED BY MEANS OF A VISIBLE
BREAK AND SECURELY GROUNDED FOR
SAFETY OF PERSONNEL PERFORMING
MAINTENANCE OPERATIONS ON THE
CIRCUIT BREAKERS.
7. Interlocks are provided to ensure the
proper operating sequences of the circuit
breakers and for the safety of the user. If for
any reason an interlock does not function
as described, do not make any adjustments,
modification, or deform the parts. DO
NOT FORCE THE PARTS INTO POSITION.
CONTACT POWELL FOR INSTRUCTIONS.
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Safety
SM-1500
e. X-rA y S
When high voltage is applied across the
contacts of a vacuum interrupter, there is the
possibility of generation of X-rays. The intensity
of the X-radiation is dependent on the peak
voltage and the contact gap. At the normal
operating voltage for this type of equipment,
the radiation levels are negligible. At the
voltages specified for testing, test personnel
shall be in front of the circuit breaker such that
the two layers of steel used in the frame and
front cover construction are between the test
personnel and the vacuum interrupters, and
that the test personnel be no closer than one
meter (3’) from the front of the circuit breaker.
THE CIRCUIT BREAKER SHALL BE EITHER
FULLY OPEN, OR FULLY CLOSED WHEN
MAKING HIGH POTENTIAL TESTS. DO NOT
TEST WITH CONTACTS PARTIALLY OPEN.
f. SA f e t y lA B e l S
The equipment described in this document
has DANGER, WARNING, CAUTION, and
instruction labels attached to various locations.
All equipment DANGER, WARNING, CAUTION,
and instruction labels shall be observed when
the circuit breaker is handled, operated, or
maintained.
Warning and Caution labels are located in
various places in and on the switchgear and
on the circuit breaker removable element.
Always observe these warnings and caution
labels. Do NOT remove or deface any of these
warning/caution labels.
IMPORTANTIMPORTANT
!
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6Equipment Description
Motor Cuto Switch Assembly SM-1500
Ch 3 Equipment Description
A. Ge n e r A l
The motor cutoff switch assembly is located
on the floor pan of the mechanism area just
right of the main mechanism (Figure 2, a).
CAUTIONCAUTION
!
Ensure that the control circuits are
deenergized and the circuit breaker is
deenergized, disconnected by means of a
visible break, and securely grounded. Do NOT
start to work on a closed circuit breaker or a
circuit breaker with the main closing spring
charged.
You should have the following when receiving
the motor cutoff switch assembly:
• MotorCutoffSwitch
Use existing hardware when replacing Motor
Cutoff Switch assembly:
• ⁄ - 20 x ⁄” Hex Head Bolt (2)
• ⁄ - 20 Flat Washers (4)
• ⁄ - 20 Star Nuts (2)
Tools required:
• Flatheadscrewdriver
• ⁄ Socket Wrench
• ⁄ Socket
• ⁄ Open End Wrench
Figure 1 Motor Cutoff Switch Assembly
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Installation
SM-1500
Ch 4 Installation
A. re m o v i n G t h e ol d mo t o r cu t o f f SW i t c h AS S e m B l y
A n d in S t A l l i n G t h e re p l A c e m e n t mo t o r cu t o f f
SW i t c h AS S e m B l y
1) Removing the Old Motor Cutoff Switch
Assembly
Perform the following steps to remove the
old motor cutoff switch assembly:
CAUTIONCAUTION
!
Ensure that the control circuits are
deenergized and the circuit breaker is
deenergized, disconnected by means of a
visible break, and securely grounded. Do NOT
start to work on a closed circuit breaker or a
circuit breaker with the main closing spring
charged.
a. Removethefrontcoverofthecircuit
breaker.
Figure 2 Motor Cutoff Switch Assembly
Installed
a
a. Motor Cutoff Switch Assembly
b. Elevate and secure the circuit breaker
so that there is at least 6 inches of clear
space below the base pan of the circuit
breaker.
c. Once the circuit breaker is stable and
secure, remove the two (2) ⁄ - 20 x ⁄”
hex head bolts holding the assembly to
the circuit breaker floor pan using a
⁄ socket wrench and ⁄ open end
wrench(Figure3).Removethetwo(2)
⁄ - 20 flat washers from below and the
two (2) ⁄ - 20 star nuts and two
(2) ⁄ - 20 flat washers from above.
Figure 3 Removing Hex Head Bolts
d. Cut the tie wrap holding the wires from
the motor cutoff switch to the wire
harness (Figure 4) and disconnect the
wires, being careful to note which wires
go to which terminal and remove the
assembly (Figure 5).
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8Installation
Motor Cuto Switch Assembly SM-1500
Figure 4 Cut Tie Wrap Holding Wire Harness to
Motor Cutoff Switch Wires
Figure 5 Disconnect Wires from Motor Cutoff
Switch
2) Installing the New Motor Cutoff Switch
Assembly into the Circuit Breaker
CAUTIONCAUTION
!
Ensure that the control circuits are
deenergized and the circuit breaker is
deenergized, disconnected by means of a
visible break, and securely grounded. Do NOT
start to work on a closed circuit breaker or a
circuit breaker with the main closing spring
charged.
Perform the following steps to install the new
motor cutoff switch assembly:
a. Removethefrontcoverofthecircuit
breaker.
b. Elevate and secure the circuit breaker
so that there is at least 6 inches of clear
space below the base pan of the circuit
breaker.
c. Once the circuit breaker is stable and
secure, position the new motor cutoff
switch on the base pan and apply
LockTite 242 or equal to the two
(2) ⁄ - 20 x ⁄”hexheadbolts.Replace
the two (2) ⁄ - 20 flat washers and insert
from underneath the circuit breaker
base pan (Figure 6, b).
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Installation
SM-1500
Figure 6 Installing the Motor Cutoff Switch
Assembly onto the Circuit Breaker
a. ⁄ - 20 Star Nut (2)
b. ⁄ - 20 x ⁄” Hex Head Bolt (2)
c. ⁄ - 20 flat washers (2)
a
cb
d. Replacethetwo(2)⁄ - 20 flat washers
(Figure 6, c) to each hex head bolt on
top of base pan and tighten in place
using the two (2) ⁄ - 20 star nuts
(Figure 6, a) and torque the two hex
head bolts to 5-7 ft-lbs.
e. Reconnectthewirestothenewmotor
cutoff switch (Figure 7) and tie wrap
the wire harness to the wires from the
motor cutoff switch (Figure 8). No
adjustments are required.
Figure 7 Reconnect Wires to Motor Cutoff
Switch
Figure 8 Tie Wrap Wire Harness
a. Tie Wrap
a
b. Operate the circuit breaker electrically
several times to ensure the switch
functions properly.
c. Replacethefrontcover.
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10
Motor Cuto Switch Assembly SM-1500
©2006PowellIndustries,Inc.•Allrightsreserved.
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Powell Electrical Systems, Inc.
ServiceDivision-Houston
POBox12818•Houston,TX•77217
Tel:713.944.6900•Fax:713.948.4569
www.powellind.com
[e-mail]
©2006PowellIndustries,Inc.•Allrightsreserved.
SM-1500
Motor Cutoff Switch Assembly
January 2009
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