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01.4IB.30000
Powell GIS™ (Gas Insulated Switchgear)
G81 - 36kV / 1250A, 2000A, 2500A, & 3150A / 40kA
G82 - 38kV / 1200A, 2000A, 2500A / 40kA
Powell GIS™
38kV Gas Insulated Switchgear
Contact Information
Powell Electrical Systems, Inc.
powellind.com
info@powellind.com
Service Division
PO Box 12818
Houston, Texas 77217-2818
Tel: 713.944.6900
Fax: 713.948.4569
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01.4IB.30000
01.4IB.30000
Signal Words
Qualified Person
As stated in ANSI Z535.4-2007, 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”, “Caution” and “Notice”.
These words are defined as:
For the purposes of this manual, a qualified
person, as stated in NFPA 70E®, is one who has
skills and knowledge related to the construction
and operation of the electrical equipment and
installations and has received safety training to
recognize and avoid the hazards involved. In
addition to the above qualifications, one must also
be:
!
DANGER
DANGER indicates an imminently hazardous
situation which, if not avoided, will result in
death or serious injury.
!
WARNING
WARNING indicates a potentially hazardous
situation which, if not avoided, could result in
death or serious injury.
!
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.
CAUTION
CAUTION, used with the safety alert symbol,
indicates a hazardous situation which, if not
avoided, could result in minor or moderate
injury.
CAUTION
CAUTION, used without the safety alert
symbol, is used to address practices not
related to personal injury.
NOTICE
NOTICE is used to address practices not related
to personal injury.
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38kV Gas Insulated Switchgear
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01.4IB.30000
01.4IB.30000
Contents
Ch 1 General Information .................................................................................................1
A. Scope ................................................................................................................................................................2
B.Purpose .............................................................................................................................................................2
C. Instruction Bulletins Available Electronically .....................................................................................................2
Ch 2 Safety ........................................................................................................................3
A.
B.
C.
D.
E.
F.
Safe Work Condition . ........................................................................................................................................3
Safety Guidelines ...............................................................................................................................................3
General .............................................................................................................................................................4
Specific ..............................................................................................................................................................4
X-Rays ..............................................................................................................................................................5
Safety Labels .....................................................................................................................................................5
Ch 3 General Powell GIS™ .................................................................................................6
A.Description ........................................................................................................................................................6
1) Safety and Maintenance ....................................................................................................................................... 6
2) Four Completely Segregated Areas ..................................................................................................................... 6
Ch 4 General Specification ................................................................................................7
A. Applied Standard ...............................................................................................................................................7
B. Service Condition ...............................................................................................................................................7
C. Structure ..........................................................................................................................................................7
1)General ........................................................................................................................................................................................ 7
2) Circuit Breaker ........................................................................................................................................................................... 7
3) 3-Position Switch ...................................................................................................................................................................... 7
4)Bus ................................................................................................................................................................................................ 7
5) Current Transformer ................................................................................................................................................................ 8
6) Potential Transformer ............................................................................................................................................................. 8
7) Lightning Arrester .................................................................................................................................................................... 8
8)Painting ...................................................................................................................................................................................... 8
Ch 5 Technical Specification .............................................................................................9
A.Ratings . ............................................................................................................................................................9
B. 3-Position Switch . .......................................................................................................................................... 10
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Powell GIS™
38kV Gas Insulated Switchgear
01.4IB.30000
Contents
Ch 6 Structure .................................................................................................................11
A. General .......................................................................................................................................................... 11
B.Circuit Breaker . .............................................................................................................................................. 11
C. Mechanisms .................................................................................................................................................... 12
1) Circuit Breaker Mechanism ..................................................................................................................................................12
2) 3-Position Switch Mechanism .............................................................................................................................................12
D. Bus Compartment . .......................................................................................................................................... 13
E.Cable Compartment ......................................................................................................................................... 13
Ch 7 Operation ................................................................................................................14
A.Construction of each Feeder ............................................................................................................................ 14
B.Operation Circuit Breaker ............................................................................................................................... 16
C.Operation of 3-Position Switch . ...................................................................................................................... 19
1) Electric Operation ...................................................................................................................................................................20
2) Manual Operation .................................................................................................................................................................20
Ch 8 Components ............................................................................................................22
A.Circuit Breaker (HHF) ..................................................................................................................................... 22
B.Vacuum Interrupter Construction .................................................................................................................... 22
C. 3-Position Switch (3PS) .................................................................................................................................. 23
D. Bus Bar Connector (Single Phase) . .................................................................................................................. 23
E. 3-Position Switch Bushing (Connects Bus Bar Compartment and Circuit Breaker Compartment) .......................... 23
F.Cable Socket . ................................................................................................................................................. 23
G.Rupture Disc ................................................................................................................................................... 24
Ch 9 Assembly & Carry ....................................................................................................25
Ch 10 Installation ............................................................................................................26
A. Installation .................................................................................................................................................... 26
B.Erection of Powell GIS™ ................................................................................................................................. 27
1)
2)
3)
4)
5)
6)
End Panel ..................................................................................................................................................................................27
Next Panel ................................................................................................................................................................................27
Installation of End Panel .......................................................................................................................................................32
Connecting Primary and Secondary Cables ....................................................................................................................32
Pressure Relief Arc Gas Ducts ...............................................................................................................................................32
Special Accessories for G81 & G82 Installation ................................................................................................................32
C.Extension of Panels on Site .............................................................................................................................. 33
D.HV Cable Connection ...................................................................................................................................... 35
E.Final Equipment Check ..................................................................................................................................... 35
F. Insulation Gas ................................................................................................................................................ 35
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01.4IB.30000
Contents
Ch 11 Maintenance & Test Procedure .............................................................................36
A. Maintenance ................................................................................................................................................... 36
1)Safety .........................................................................................................................................................................................36
2) Maintenance Terms ...............................................................................................................................................................36
3) Check of Insulation Gas ........................................................................................................................................................36
4) Instruction for Lubrication Use ............................................................................................................................................36
B.Test Procedure ............................................................................................................................................... 37
1) Visual Check .............................................................................................................................................................................37
2) Functional Test ........................................................................................................................................................................37
3)Cleaning ...................................................................................................................................................................................37
4) Check the Control Circuit Wiring ........................................................................................................................................37
5) SF₆ Gas Leakage Test .............................................................................................................................................................37
6) Control Circuit Wiring Test ...................................................................................................................................................38
7)Timing .......................................................................................................................................................................................38
8) 3-Position Switch (disconnector or earth) Operating Test ............................................................................................38
9) Manual Close/Open Test .......................................................................................................................................................38
10) Potential Transformer Test ...................................................................................................................................................38
Ch 12 Others ...................................................................................................................39
A.Post Processing of Bolt and Torque Valve ....................................................................................................... 39
B.Processing of Contact Surface ........................................................................................................................ 39
1)Cleaning ...................................................................................................................................................................................39
C. Gas Monitoring System (HMD3) ..................................................................................................................... 39
1) 2) 3)
4)
Channel Scan ..........................................................................................................................................................................39
Automatic Scan Mode ...........................................................................................................................................................39
Manual Scan Mode ................................................................................................................................................................40
Change the Parameter ..........................................................................................................................................................40
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Powell GIS™
38kV Gas Insulated Switchgear
01.4IB.30000
Figures
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
iv
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
Drawing of G81 .............................................................................................11
Circuit Breaker Mechanism ...........................................................................12
3-Position Switch Mechanism .......................................................................12
G81 Single Bus System ..................................................................................14
G82 Transfer Bus System ...............................................................................15
Circuit Breaker Schematic .............................................................................16
Flowchart for Circuit Breakers ......................................................................17
Available position for 3-Position Switch and Circuit Breaker ......................18
3-Position Switch Schematic .........................................................................19
Operation Device & Switch Position .............................................................21
Circuit Breaker and Mechanism ...................................................................22
Vacuum Interrupter for HVS-03644 ..............................................................22
Structure of 3-Position Switch ......................................................................23
Structure of Bus bar Connector ....................................................................23
Structure of 3PS Bushing ..............................................................................23
Structure of Cable Socket ..............................................................................23
Rupture Disc ..................................................................................................24
Equipment Lifting .........................................................................................25
Installation ....................................................................................................26
End Panel Installation ...................................................................................27
Bolting of Guide Pin ......................................................................................28
Installing Bolts and Guide Pins .....................................................................29
Connecting to Bus Bar Socket .......................................................................29
Panel and Bus Bar Connection ......................................................................30
Figure of Installation Site ..............................................................................31
Bus Bar Closing Caps .....................................................................................32
Future of Extension Site ................................................................................34
Connection of the HV Cable Plug .................................................................35
Lubrication of Circuit Breaker Mechanism ...................................................36
Lubrication of 3-Position Switch Mechanism ...............................................37
HMD3 .............................................................................................................41
Wiring Connection Diagram .........................................................................42
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01.4IB.30000
Tables
Table A Cubicle Type Gas Insulated Switchgear Ratings ...................................................9
Table B 3-Position Switch .................................................................................................10
Table C Installation Steps .................................................................................................26
Table D Erection of Powell GIS™ Steps .............................................................................27
Table E Next Panel Installation ........................................................................................27
Table F Installation of End Plate Steps .............................................................................32
Table G Special Accessory for G81 & G82 Installation .....................................................32
Table H Extension of Panels on Site Steps .......................................................................33
Table I Maintenance Terms ..............................................................................................36
Table J Inspection .............................................................................................................36
Table K Timing ..................................................................................................................38
Table L Insulation Resistance ...........................................................................................38
Table M Class 8.8 or 9.8 Bolt and Nut ...............................................................................39
Table N Class 10.9 Bolt and Nut .......................................................................................39
Table O Change the Parameter ........................................................................................40
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Powell GIS™
38kV Gas Insulated Switchgear
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01.4IB.30000
01.4IB.30000
Ch 1 General Information
WARNING
!
The equipment described in this document may contain high voltages and currents which can
cause death or serious injury.
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.
!
WARNING
Prior to adjustments, servicing, maintenance, or any act requiring the operator to make physical
contact with the equipment, the power source must be disconnected and the equipment grounded.
Failure to do so may result in death or serious injury.
NOTICE
The information in this instruction bulletin is not intended to explain all details or variations of the
Powell equipment, nor to provide for every possible contingency or hazard to be met in connection
with installation, testing, operation, and maintenance of the equipment. For additional
information and instructions for particular problems, which are not presented sufficiently for the
user’s purposes, contact Powell at 1.800.480.7273.
NOTICE
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.
General Information
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1
Powell GIS™
38kV Gas Insulated Switchgear
A. Scope
The information in this instruction bulletin
covers the technical data in respect to the
36kV/38kV, 40kA SF₆ Powell GIS™ (Gas
Insulated Switchgear).
B.Purpose
The information in this instruction bulletin is
intended to provide information required to
properly operate and maintain the
Gas Insulated Switchgear described in
Ch 1 General Information, A. Scope.
!
01.4IB.30000
WARNING
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.
To the extent required, the products described
herein meet the applicable ANSI, IEEE, NEMA,
and IEC Standards; however, no such assurance
is given with respect to local codes and
ordinances which may vary greatly.
C. Instruction Bulletins Available Electronically
This instruction bulletin provides:
NOTICE
1. Safety guidelines
2. General descriptions of the operation
and maintenance of the gas insulated
switchgear
3. Instructions for installation and placing the
switchgear into service
4. Instructions for part replacement
5. Information for ordering renewal parts
6. Procedure for critical adjustments
7. Illustrations, photographs, and description
of the switchgear
The illustrations contained in this document
may not represent the exact construction
details of each particular type of gas insulated
switchgear. The illustrations in this document
are provided as general information to aid in
showing component locations only.
Changes to the instruction bulletin may be
implemented at any time and without notice.
Go to powellind.com to ensure use of the
current instruction bulletin for the Powell
equipment.
For more information visit powellind.com. To
contact the Powell Service Division call
1.800.480.7273 or 713.944.6900, or email
info@powellservice.com.
For specific questions or comments pertaining
to this instruction bulletin email
documents@powellind.com with the IB
number in the subject line.
All illustrations and photos are shown using
deenergized equipment.
2
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General Information
01.4IB.30000
Ch 2 Safety
A. Safe Work Condition
The information in Section A is quoted from
NFPA 70E 2012 - 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.
Informational Note: See ANSI/ISA-61010-1
(82.02.01)/UL 61010-1, Safety Requirements
for Electrical Equipment for Measurement,
Control, and Laboratory Use - Part 1: General
Requirements, for rating and design
requirements for voltage measurement
and test instruments intended for use on
electrical systems 1000 V and below.
Safety
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. Safety Guidelines
Study this instruction bulletin and all other
associated documentation before uncrating
the switchgear.
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.
The switchgear described in this instruction
bulletin are operated by a high-energy,
high-speed mechanism that is interlocked
to provide specific operating sequences. 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
gas insulated switchgear.
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Powell GIS™
38kV Gas Insulated Switchgear
C. General
1. Only supervised and qualified personnel
trained in the usage, installation, operation,
and maintenance of gas insulated
switchgear 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. Specific
1. Do not work on an energized circuit
breaker.
2. Do not work on a circuit breaker with the
control circuit energized.
4
01.4IB.30000
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 open position and
disconnector open, and circuit earthed.
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
01.4IB.30000
E. X-Rays
F. Safety Labels
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.
Safety
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.
NOTICE
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.
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Powell GIS™
38kV Gas Insulated Switchgear
01.4IB.30000
Ch 3 General Powell GIS™
A.Description
Powell’s cubical type gas-insulated switchgear
is an integrated assembly of a vacuum circuit
breaker, the 3-position switch/disconnector,
bus connecting system and control devices
coordinated electrically and mechanically for a
medium voltage power system.
1) Safety and Maintenance
•
•
•
The 3-position switch is interlocked with
circuit breaker mechanically
Circuit breaker function accompanied
by earthing function in combination
with the 3-position switch
Operating mechanism is accessed from
outside of enclosure
2) Four Completely Segregated Areas
•
•
•
•
6
Bus compartment(s)
Circuit breaker compartment
Cable compartment
Low voltage compartment
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General PGIS
01.4IB.30000
Ch 4 General Specification
2) Circuit Breaker
A. Applied Standard
1. Powell GIS™ if manufactured in accordance
with the IEC standards.
• IEC 62271-100: High-Voltage
alternating current circuit breakers
• IEC 62271-200: AC Metal-Enclosed
Switchgear and control gear for rated
voltages above 1kV and up to and
including 52kV.
• IEC 62271-102: High-Voltage
alternating current disconnector and
earthing.
• IEC 60376: Specification of technical
grade sulfur hexafluoride (SF₆) for use in
electrical equipment.
• IEC 60480: Diagnosis guide of SF₆ gas
for electric device.
B. Service Condition
1. Location: Indoor
2. Ambient Temperature: -5 ~ +40˚C
3. Altitude: Not exceeding 1,000m above sea
level
4. Atmospheric Condition: Not notably
polluted
The circuit breaker is rated up to 36kV/38kV,
40kA. The circuit breaker consists of
a vacuum interrupter, insulator frame
and operating mechanism. The circuit
breaker poles are installed horizontally
in the circuit breaker compartment. The
vacuum interrupter is supported by the
insulator frame located in the circuit
breaker compartment. The circuit breaker
is operated by a stored energy mechanism
normally charged by a small universal
motor, but it can be also charged by a
manual handle for emergency manual to
close and open. The circuit breaker has
three independent vacuum interrupters.
3) 3-Position Switch
The 3-positon switch is rated up to
36kV/38kV, 40kA and is a motor operating
rod-type switch. Live switch components
(bus bar, insulated spindle with moving
contact) are in the gas compartment and
the operating mechanism components
(drive motor, position indicator and
emergency manual operation) outside of
the gas compartment.
4)Bus
C. Structure
1)General
The gas tank has been designed for its
entire life. It is made of stainless-steel (SUS
304L), contains a 3-position
switch/disconnector switch, bus bar and
vacuum interrupter.
•
•
Single and double bus system
Transfer Bus System
The tank is permanently sealed. No
maintenance or refilling of the tank
required. In the event of an internal arc,
each tank has a rupture disc which direct
gases to an arc duct assembly.
General Specifications
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Powell GIS™
38kV Gas Insulated Switchgear
01.4IB.30000
5) Current Transformer
•
The current transformer is an individual cast-resin insulated product available to be installed
inside a SF₆ gas compartment.
6) Potential Transformer
•
The potential transformer is a plug-in and epoxy molding type.
7) Lightning Arrester
•
The lightning arrester is a plug-in type.
8)Painting
•
8
The gas tanks are stainless steel and do not require painting. All other external metal surfaces
are cleaned, rust proofed and painted in accordance with Powell’s paint thickness.
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General Specifications
01.4IB.30000
Ch 5 Technical Specification
A.Ratings
Table A Cubicle Type Gas Insulated Switchgear Ratings
Switchgear Type
HMGS-G81
HMGS-G82
36 [40.5]
38
Rated Voltage (kV)
1
Power Frequency Withstand Voltage (kV)
70 [95]
Lightning Impulse Withstand Voltage (kV)
170 [190]
Rated Frequency (Hz)
80
1
1
50 / 60
150 [200]1
50 / 60
Main Bus
≤ 3150
≤ 2500
Feeder
1250 / 2000 / 2500 / 3150
1200 / 2000 / 2500
Rated Short Time Withstand Current, 3s (kA)
40
40
Rated Peak Withstand Current (kA, peak)
104
104
Rated Short Circuit Breaking Current (kA)
40
40
Rated Short Circuit Making Current (kA)
104
104
O-0.3s-CO--15s-CO
O-0.3s-CO--15s-CO
Closing Time (ms)
≤ 70
≤ 70
Opening Time (ms)
Normal Current (Amperes)
Rated Operating Sequence
≤ 50
≤ 40
Breaking Time (cycle)
5
3
Auxiliary Voltage (V)
DC110 / 1252
DC110 / 1252
SF6
SF6
Insulation Gas
Rated Pressure at 20°C (bar)
0.3 [0.4]
Minimum Operating Pressure at 20°C
0.2 [0.3]
0.3
Arc Classification (62271-200)
B FLR, 40kA / 1s
B FLR, 40kA / 1s
Bus Bar System
Single / Double
Single / Double / Transfer
≤ 1250A
600 [800]
800
≥ 2000A
800
800
Depth (D) [optional extra depth]
1760 [1960]5
1960
Height (H)
2400
2400
1
Width (W)
Size (mm)3
0.4
1
4
Notes:
1 The value in “[ ]” is for the system according to the GOST 1516.3, GB 3906 or relevant standard on
request.
2 The auxiliary voltage can be changed on request.
3 The size of actual panel can be different according to the rating, quantity and arrangement of
components.
4 Width of the panel in [ ] is when voltage transformer is installed.
5 Depth of the panel can increase according to the numbers and size of components in low voltage compartment.
Technical Specification
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Powell GIS™
38kV Gas Insulated Switchgear
01.4IB.30000
B. 3-Position Switch
Table B 3-Position Switch
Type
3PS
Rated Voltage
36(38)kV
Frequency
50/60Hz
Rated Current
1200A/1250A/2000A/2500A/3150A
Power Frequency
withstand
Voltage
Lightning
impulse
withstand
voltage (1.2/50)
Short-time
withstand
current
frequency
Phase to earth and
between phases
70(80)kV
Across the isolating
distance
80(88)kV
Phase to earth and
between phases
170kV
Across the isolating
distance
195kV
40kA
Peak
withstand
current
104kA
Duration
of
shortcircuit
3s
Disconnector
class of
mechanical
endurance
M1
Operation
method
Motor & Handle
Control Voltage
DC110 / 125VDC
Control Voltage
change range
85 ~ 110%
10
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Technical Specification
01.4IB.30000
Ch 6 Structure
Figure 1
Drawing of G81
i
A. General
Powell GIS™ is a metal enclosure 3-phase
conductor that is symmetrically arranged with
a compact structure.
B.Circuit Breaker
f
a
b
The circuit breaker compartment contains a
vacuum interrupter assembly that is connected
to a mechanism for open and close operation.
The 3-position switch can connect and
disconnect the main bus. The switch can also
ground the circuit breaker and connected line
or load terminals.
c
d
e
g
f
h
i
j
k
l
a.
b.
c.
d.
e.
f.
g.
h.
i.
j.
k.
l.
Structure
Main Bus
3-Position Switch Mechanism
3-Position Switch
Main 3-Pole Bushing (Contact Conductor)
Vacuum Interrupter
Rupture Disc
Vacuum Interrupter Housing
Circuit Breaker Mechanism
Arc Gas Duct
Current Transformer (Block Type)
Cable Socket (Structure)
Instrument Compartment
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11
Powell GIS™
38kV Gas Insulated Switchgear
C. Mechanisms
2) 3-Position Switch Mechanism
1) Circuit Breaker Mechanism
•
•
•
•
Figure 2
01.4IB.30000
•
•
Motor : ~ 125 VDC, for close spring
charging
Auxiliary switch : 5 Poles or 10 poles
Close coil : 86 Ohm
Trip coil : 86 Ohm for 5 cycles or (42
Ohm for 3 cycles)
Motor : ~125 VDC
Auxiliary switch (DS,Open,ES) : Up-to 10
Poles
Motor & hand operation
•
Figure 3
3-Position Switch Mechanism
a
Circuit Breaker Mechanism
b
c
d
a
c
d
b
e
e
f
h
f
g
k
m
i
j
l
g
n
h
o
a. Close/Open Indicator
b. Breaker Shaft
c. Dash Pot
d. Operating Counter
e. Opening Button
f. Closing Mechanism
g. Open Solenoid
h. Close Spring
i. Closing Button
j. Manual Charging Operating Hole
k. Trip Spring
l. Closing Solenoid
m.Spring Charge Indicator
n.Motor
o. Auxiliary Switch
12
a.Indicator
b. Handle Insert Hole
c.Motor
d. Interlock Rod
e. Limit Switch for Motor Control
f. Auxiliary Switch
g. Drive Gear
h. Clutch for Motor Control
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Structure
01.4IB.30000
D. Bus Compartment
Bus bar compartment contains a main bus bar,
feeder bus bar including the 3-position switch
(3PS), filled with SF₆ gas with safety rupture
discs activated by overpressure.
E.Cable Compartment
Cable compartments contain the incoming or
outgoing cable supports and earthing bus. The
cable compartment is sealed by metal walls.
Under the Arc Fault condition, the rupture disc
may rupture and should be checked visually by
opening the arc gas duct panel.
Structure
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13
Powell GIS™
38kV Gas Insulated Switchgear
01.4IB.30000
Ch 7 Operation
A.Construction of each Feeder
Figure 4
G81 Single Bus System
Circuit Diagram for Typical Unit
Arc Way
Outgoing Feeder
Incoming Feeder
Bus - VT
Bus - Coupler
3PS
3PS
3PS
CB
1250A
CB
2500A
Arc Way
3PS
PF
CB
VT
CT
VT
CT
CT
SA
VD
ZCT
250
600
800
800
800
250
CB Panel/Outgoing Feeder
a
b
c
d
e
f
g
h
i
j
k
a. Main Bus
b. 3-Position Switch
c. 3-Position Switch Mechanism
d.Bushing
e. Vacuum Interrupter
f.
g.
h.
i.
j.
k.
Rupture Disc
Circuit Breaker Mechanism
Current Transformer (Block Type)
Inner Cone Socket
Surge Arrestor
Zero Sequence Current Transformer
Note:
1.
2.
14
Width of panel can be increasing according to the specification or quantity of current transformers.
An arc way is needed at each side of the end panel
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Operation
01.4IB.30000
Figure 5
G82 Transfer Bus System
Circuit Diagram for Typical Unit
Arc Way
Incoming Feeder
3PS
Outgoing Feeder
DS
3PS
Bus PT
Bus-Coupler
DS
3PS
CB
CB
3PS
PF
PF
PT
PT
250
3PS
CB
CT
3PS
CT
Arc Way
CT
800
800
800
800
250
CB Panel/Outgoing Feeder with Plug-in Circuit
l
a
b
c
d
e
f
g
h
j
i
k
l
a. Main Bus
b. 3-Position Switch
c. 3-Position Switch
Mechanism
d.Bushing
e. Vacuum Interrupter
f. Circuit Breaker Mechanism
g.
h.
i.
j.
k.
l.
Rupture Disc
3-Position Switch
3-Position Switch Mechanism
Current Transformer
Inner Cone Socket
Arc Gas Duct
Note:
1. An arc way is needed at each side of the end panel
Operation
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15
Powell GIS™
38kV Gas Insulated Switchgear
01.4IB.30000
B.Operation Circuit Breaker
Figure 6
Circuit Breaker Schematic
P
Close
Command
1
6
21
S21
M
14
61
ASO
6
K1
4
62
A2
21
4
13
S3
22
A1
S22
Open
Command
S3
11
12
63
ASO
64
1
K1
5
8
K1
A1
22
Y9
A2
7
R
7
2
A1
Y1
A2
5
N
16
S21 & S22
:
Limit Switch for Driving Springs
S3
:
Limit Switch Close
ASO
:
Auxiliary Switch
K1
:
Anti Pumping Relay
M
:
Motor for Spring Charging
Y1
:
Trip Coil
Y9
:
Closing Coil
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Operation
01.4IB.30000
Figure 7
Flowchart for Circuit Breakers
Motor Motion
Closing Spring
Charging
Limit Switch
S3 Close
Limit Switch
S21, S22 Open
CB Closing Signal Input
Motor Stop
Energizing Trip Coil
CB Close
CB Close by Manual
(by button)
Release Closing Spring
Limit Switch
S21, S22 Close
CB Open Signal
(Protection Relay
CS S/W)
Energizing Trip Coil
Charging Closing
Spring by Handle
CB Open
CB Open by Manual
(by button)
Electric Operation
Manual Operation
Operation
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17
Powell GIS™
38kV Gas Insulated Switchgear
Figure 8
Available position for 3-Position Switch and Circuit Breaker
DISCONNECT / OPEN
18
01.4IB.30000
CONNECT / CLOSE
READY FOR EARTHING
CABLE SIDE EARTHING
3PS
3PS
3PS
3PS
CB
CB
CB
CB
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Operation
01.4IB.30000
C.Operation of 3-Position Switch
3-Position Switch Schematic
13
13
13
13
23
23
23
23
E1CX
D1OX
E1OX
D1CX
E1CX
D1OX
E1OX
D1CX
14
14
14
14
24
24
24
23
3PS1
XA1
9
025
Figure 9
XA1
25
11
024
023
+
M
24
+
CH
-
10
-
12
24
33
33
33
33
E1CX
D1OX
E1OX
D1CX
34
34
34
34
D1CX : Disconnector Close Command Contact
D1OX : Disconnector Open Command Contact
E1CX : Earthed Close Command Contact
E1OX : Earthed Open Command Contact
Operation
M
: Motor
CH
: Motor Clutch
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19
Powell GIS™
38kV Gas Insulated Switchgear
1) Electric Operation
01.4IB.30000
2) Manual Operation
Refer to Figure 9 during electric operation.
Refer to Figure 10 during manual operation.
A clutched motor is used for the electrical
operation of the 3-Position disconnector.
The motor can be operated forward or
reversed direction and the motor clutch
makes the operation of the motor stop to
prohibit over operating of the disconnector
as follows:
Carefully follow the instructions on the face
of the selector switch mechanism.
a. Disconnector : Off → On
When the command contact “D1CX” is
closed, the motor is rotated clockwise
so that the position of the disconnector
is connected.
b. Disconnector : On → Off
If the command contact “D1OX”
is closed, the motor is rotated
counterclockwise so that the position of
this disconnector is disconnected.
c. Earthing : Off → On
If the command contact “E1CX”
is closed, the motor is rotated
counterclockwise so that the position of
this disconnector is placed “earth”.
d. Earthing : On → Off
When command contact “E1OX” is
closed, the motor is rotated clockwise
so that the position of this disconnector
is placed “disconnected”.
The 3-position switch can only be operated
when the circuit breaker is in the open
position. If the circuit breaker is closed,
the 3-position switch cannot be operated
mechanically as the circuit breaker interlock
prohibits insertion of the manual handle
into the access port.
The circuit breaker can only be operated
when the 3-position switch is fully in the
connected, disconnected, or earthed
position. The manual handle can not be
removed until switching operation has
been completed.
The 3-position switch contains a moving
contact that moves in a longitudinal
direction by an internal trapezoid threaded
screw among fixed and earthing contacts.
The alternating movement provides for
the switching of the disconnecting switch
contact, open position or switching of the
earthing contact of the 3-position switch.
As the switch is rotated clockwise from
the “OFF”position, it is placed in the
“connected” (service on) position. From the
“connected” position, counter-clockwise
rotation returns the switch to the “open”
position.
As the switch is rotated counterclockwise
from the “open” position, the switch is
now in the “earthed” position. From the
“earthed” position, clockwise rotation
returns the switch to the “open” position.
20
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Operation
01.4IB.30000
Figure 10 Operation Device & Switch Position
Connected Position
!
DANGER
!
CAUTION
Disconnected Position
DISCONNECTING
OFF
ON
OFF
ON
EARTHING
Earthed Position
Operation
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21
Powell GIS™
38kV Gas Insulated Switchgear
01.4IB.30000
Ch 8 Components
B.Vacuum Interrupter Construction
A.Circuit Breaker (HHF)
Figure 12 Vacuum Interrupter for HVS-03644
Figure 11 Circuit Breaker and Mechanism
d
c
a
a
b
e
b
c
a. Contact Spring
b. Circuit Breaker Mechanism
c. Pole with VI
f
a. Contact Tip
b. Contact Base
c.Bellows
d. Fixed Stem
e. Arc Chamber
f. Movable Stem
22
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Operation
01.4IB.30000
C. 3-Position Switch (3PS)
E. 3-Position Switch Bushing (Connects Bus Bar
Compartment and Circuit Breaker Compartment)
Figure 13 Structure of 3-Position Switch
Figure 15 Structure of 3PS Bushing
c
a
b
a. Manual Handle Insert hole
b. Operating Screw Rod
c. 3PS Pole
D. Bus Bar Connector (Single Phase)
F.Cable Socket
Figure 14 Structure of Bus bar Connector
Figure 16 Structure of Cable Socket
a. Bus Bar Connector for 1250A
b. Bus Bar Connector for 2500A
Operation
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23
Powell GIS™
38kV Gas Insulated Switchgear
01.4IB.30000
G.Rupture Disc
Figure 17 Rupture Disc
Normal
Ruptured
24
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Operation
01.4IB.30000
Ch 9 Assembly & Carry
It is recommended that the equipment be moved by crane but if one is not available a forklift or hand
push vehicle is sufficient.
When using a crane to lift, make sure to keep the same angles of the chain on both sides of the
equipment. Always keep the equipment in an upright, horizontal position during movement.
Figure 18 Equipment Lifting
Assembly & Carry
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25
Powell GIS™
38kV Gas Insulated Switchgear
Ch 10 Installation
Figure 19 Installation
2
1 ...3 mm
A. Installation
Table C Installation Steps
26
01.4IB.30000
Step #1
Bolt the individual base frames together. Set
the distances according to the installation
plan. Keep them in one plane.
Step #2
Position the whole base frame on the
floor. Check distances to wall and to cable
openings.
Step #3
In the case of concrete floor, drill holes for
plugs. Place in the fastening bolts. (First
do it in the two traverse corners, then in all
other points). Continuously check the right
position.
Step #4
Insert steel shims below the height adjusting
points and insert adjusting screws.
Step #5
Adjust the whole base frame structure into
horizontal plane by adjusting the base frame
height adjusting screws. Check the position
again.
Step #6
Fasten the base frame firmly to the floor.
Step #7
When reaching a final position and
horizontal plane checking weld base frame
height adjusting screws to prevent any
change in settings.
Step #8
Earth the base frame connecting it properly
to the local earthing system.
Step #9
(Optional) Insert auxiliary bolts into the base
frame to avoid penetration of screed into the
nuts. Complete the preparation of the floor.
Fill the foundation by screening it carefully.
The Surface of the base frame shall be +/-0.5
mm above the final floor level.
3
6
7
Foundation 2
1
4
No.
5
Foundation 1
Description
1
Base Frame
2
Bottom frame of the panel
3
Panel height adjusting screw
4
Shim
5
Base Frame fixing bolt
6
Panel fixing bolt
7
Base Frame height adjusting screw (option)
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Installation
01.4IB.30000
B.Erection of Powell GIS™
2) Next Panel
1) End Panel
Table E Next Panel Installation
Table D Erection of Powell GIS™ Steps
Step #1
Bolt the guide pins into the neighboring
panel.
Step #1
Grease the upper surface of base frame
where the panel will be intended to slide.
Step #2
Bolt the special connecting bolts into the
neighboring panel.
Step #2
Put the end-panel to the base frame as close
to the final position as possible
Step #3
Step #3
Position the panel by slightly sliding it on the
greased base frame
Grease the upper surface of the base frame
where the next panel will be intended to
slide.
Step #4
Insert fixing bolts into the nuts
Step #4
Step #5
Align and position the panel precisely. Fix
height-adjusting screws by counter nuts.
Put the next panel to the base frame near
the neighboring panel leaving enough room
to carry out preparatory work described in
Steps #5 through #8.
Step #5
Step #6
Fasten the panel firmly to the base frame
after a final checking.
Remove the protective caps from the
adjacent bus bar sockets of both panels.
Step #6
Carefully check the bus bar sockets,
conductor and insulating parts of the bus
bar connecting elements (“BB connector”).
Clean all surfaces if necessary.
Step #7
Prepare connecting surfaces of conductor
and insulating parts of the bus bar
connecting elements applying grease.
Step #8
Insert conductor and insulating part of the
bus bar connecting element into the bus bar
socket of the neighboring panel.
Step #9
Slide the panel toward the neighboring
panel and help to penetrate guiding pin
into the next panel. Adjust the height of
the next panel by height-adjusting screws if
necessary.
Step #10
As soon as the next panel is close enough to
neighboring panel, insert-connecting screws.
From now approach the next panel by
tightening these screws step by step evenly.
Step #11
Make a final check (and adjustment if
necessary). The gap between main bus
compartments shall be 10(+0/-1)mm.
Step #12
Fasten the next panel to the base frame.
Figure 20 End Panel Installation
Connect the main earthing bar of the Two
panels
Earthing Bar Connection
Step #13
Installation
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27
Powell GIS™
38kV Gas Insulated Switchgear
01.4IB.30000
Figure 21 Bolting of Guide Pin
b
c
a
a.Guide Pin
b.Guide Nut
c. Connecting Piece
28
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Installation
01.4IB.30000
Figure 22 Installing Bolts and Guide Pins
Installing the guide pins
Install the connecting bolts
The connecting bolts of
the BB compartment
The connecting bolts of
the CB compartment
Figure 23 Connecting to Bus Bar Socket
Epoxy Mold
Installation
Connecting Conductor
& Silicone Tube
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29
Powell GIS™
38kV Gas Insulated Switchgear
01.4IB.30000
Figure 24 Panel and Bus Bar Connection
30
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Installation
01.4IB.30000
Figure 25 Figure of Installation Site
Put the first panel
Place new panel and install busbar connector
Place in busbar closing caps and fix gas duct closing plate
Connect all panels
Installation
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31
Powell GIS™
38kV Gas Insulated Switchgear
3) Installation of End Panel
01.4IB.30000
6) Special Accessories for G81 & G82 Installation
Table F Installation of End Plate Steps
Step #1
Place in and fix bus bar closing caps on the
first and last panels
Step #2
Place in and fix arc gas duct closing plates on
the first and last panels
Step #3
Place in and fix lateral side covers on the first
and last
Step #4
Place in bus bar closing caps and fix arc gas
duct closing plate
Figure 26 Bus Bar Closing Caps
Table G Special Accessory for G81 & G82
Installation
Figure
Quantity per Bus
Compartment
No.
Name
1
Guide Pin
4
2
Guide Nut
4
3
Connecting Piece
2
4
Connecting Bolt for
BB Compartment
2
5
Connecting Bolt for
CB Compartment
2
6
Insulation (Silicone)
Tube
3
7
Connecting Conduct
with Special Contact
3
8
Insulation Grease
Silicone
Grease
1
9
Conducting Grease
B8 Grease
1
4) Connecting Primary and Secondary Cables
Primary cables shall be connected to the
switchgear before assembling the rear
arc gas ducts. Connect secondary wiring
system to the panels.
5) Pressure Relief Arc Gas Ducts
After erecting all panels top pressure relief
ducts, rear arc gas ducts and side arc gas
ducts shall be assembled onto the panels
and joining to each other according to the
installation plan.
32
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Installation
01.4IB.30000
C.Extension of Panels on Site
Table H Extension of Panels on Site Steps
Powell Powell GIS™ can be extended on site
either on the left side or the right size after
commissioning. The factory assembled and SF₆
gas filled panels don’t need any gas handling
on installation site.
CAUTION
If future extension is expected the necessary
space requirement shall be considered in
foundation layout.
CAUTION
Do not work on energized equipment.
Working on energized equipment may cause
personal injury or even death.
Installation
Step #1
Make the necessary measurements
according to valid regulation in order to
provide safe and effective work
Step #2
Remove the lateral side covers of the
extended panel
Step #3
Remove the closing plate of arc gas duct
Step #4
Remove the closing caps of all bus bars
Step #5
Place new panel near to the existing panel
series
Step #6
Place in all bus bar connection assemblies
(contacts and insulator tubes)
Step #7
Place in arc gas duct connecting elements
Step #8
Insert positioning tools (pins)
Step #9
Move the new panel toward the existing
panel series
Step #10
Check correct position by positioning tools
Step #11
Set correct panel height position by
adjusting tools
Step #12
Repeat steps 10 and 11 as many times as it
is necessary. When the new panel is in the
correct position remove positioning tool
and join the new panel to the existing panel
series
Step #13
Fix new panel to the basement frame
Step #14
Fix arc gas duct connecting elements
Step #15
Connect earthing bar of the new panel to
the earthing bar system of the existing panel
series
Step #16
Place in and fix bus bar closing caps on the
new panel
Step #17
Fix arc gas duct connecting elements
Step #18
Place in and fix arc gas duct closing panel on
the new panel.
Step #19
Place in and fix end panel on the new panel
Step #20
Connect primary cables to the new panel
Step #21
Connect secondary wiring system to the new
panel
Step #22
Make the necessary inspection, checking and
other measures according to valid regulation
in order to ensure suitable condition of the
extended panel series
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33
Powell GIS™
38kV Gas Insulated Switchgear
01.4IB.30000
Figure 27 Future of Extension Site
The existing panels
Place new panel and install busbar connector
Remove lateral side covers and closing caps
Place in busbar closing caps and fix gas duct closing
plate on the new panel
Extenstion of panels
34
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Installation
01.4IB.30000
D.HV Cable Connection
E.Final Equipment Check
Cables are connected to Powell GIS™ utilizing a
plug in “inner sealing cone” assembly.
1. When connecting the HV cable, it is
recommended to treat ending part with
termination kit in accordance with cable
plug manufacturer’s recommendations.
2. Access the cable compartment, and then
pull the cable plug up to the cable socket.
3. Fix the cable to the cable support by clamp.
Figure 28 Connection of the HV Cable Plug
1. Tightening between Powell GIS and
foundation
2. Main bus cover compartment bolts
3. Earth bus bar bolts
4. Control cable bolts
5. Check Auxiliary Circuit and Control Circuit
6. Check Current Transformer Circuit
7. Aux Circuit and Control Circuit Check
8. Check CT Circuit by CT Circuit Drawing
F. Insulation Gas
Check input pressure by pressure meter.
Enclosure Surface
M8
(15±3Nm)
Installation
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35
Powell GIS™
38kV Gas Insulated Switchgear
Ch 11 Maintenance & Test Procedure
A. Maintenance
1)Safety
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.
2) Maintenance Terms
4) Instruction for Lubrication Use
In general, the operating mechanism
requires only moderate lubrication at
regular intervals and all excess must be
removed with a clean cloth to prevent any
accumulation of dust or dirt. Avoid any
lubricant on insulation or other electrical
parts.
Lubricate the mechanism with Alvania #2
or equivalent. Moving parts should then be
moved slightly to let the grease penetrate
and become properly distributed. After
lubrication, operate the breaker several
times manually.
The points to be lubricated is shown in
Figure 29.
Table I Maintenance Terms
Maintenance
Terms
01.4IB.30000
Description
Every 4 years
- Check SF₆ gas pressure, if need refilling
Every 12 years
- Check SF₆ gas pressure
- Grease driving device
- Test solenoid coil
After CB
mechanism
operation is 2,000
times
- CB mechanism operating test and grease
driving device
- Test solenoid coil
After 3PS
mechanism
operation is 1,000
times
- 3PS mechanism operating test and grease
driving device
Figure 29 Lubrication of Circuit Breaker
Mechanism
3) Check of Insulation Gas
Table J Inspection
Check of SF₆ Gas
Range of gas sensor
is in 1.2~1.5 bar
(abs)
Description
- Fill to recommended pressure range
- Relieve pressure if above range
•
•
•
•
36
Outer surface of spring guide
Outer surface of shaft and pin
Latch for closing/opening
Cam for closing
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Maintenance & Test Procedure
01.4IB.30000
Figure 30 Lubrication of 3-Position Switch
Mechanism
3)Cleaning
According to the result of the visual check
cleaning may be necessary.
Note: Only isolated, earthed and/or securely
isolated parts of Powell GIS™ should
be subjected to cleaning. Keep in
mind all safety regulation of relevant
standards.
4) Check the Control Circuit Wiring
•
•
Shaft and saw-tooth of all gears
Guide pin and Driving shaft
B.Test Procedure
1) Visual Check
a. General condition of cabinets and
compartments
b. All operating mechanisms (especially
that of the circuit breaker, 3-position
switch/disconnector switch, and
mechanical interlocks.
2) Functional Test
After performing the visual check, the
circuit breaker or 3-position switch
mechanical test should be performed on
all related devices, including mechanical
interlocks. During this test the device shall
be operated with no (electrical) load. If
the “visual check” raises doubts about the
proper characteristics of a component,
consult with Powell on what tests are to be
performed.
Maintenance & Test Procedure
Check the connecting condition of wiring
according to the drawing.
5) SF₆ Gas Leakage Test
If pressure is below recommended level,
perform this test to confirm that leakage
of SF₆ gas sealed in the Powell GIS has not
occurred.
a. Leak Test Method
i. Test all the compartments, o-ring
and bolting connections for leaks
using the SF₆ gas detector.
ii. The SF₆ gas detector detects Freon
gas. So, where a leak is detected
smear the spot with soapy water to
confirm the leakage. Wipe away the
soapy water after confirmation.
iii. Standard of judgment: No detection
of gas leakages.
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37
Powell GIS™
38kV Gas Insulated Switchgear
6) Control Circuit Wiring Test
01.4IB.30000
9) Manual Close/Open Test
a. Test Method
Confirm electrical operations with an
approved drawing. Validate proper
operation of all functional electrical
components and interlocks.
7)Timing
a. Test Method
Repeat open & close operation by
manual handle.
Purpose of this test is checking DS and
ES operation status.
10)Potential Transformer Test
At normal control voltage, operate the
test source to the “close” position to close
the circuit breaker and record the closing
time. The closing time from energizing the
closing coil to vacuum interrupter contact
touch should not exceed the values in
Table K Timing. Again, at normal control
voltage, operate the test source to the
“open” position to open the circuit breaker
and record the opening time. The opening
time from energizing the shunt trip coil to
vacuum interrupter contact part should not
exceed the values in Table K Timing.
a. Test Method
Use a 1000V megger for validating
the main bus insulation. Use a 500V
megger for validating control wire
insulation.
Table L Insulation Resistance
Main circuit and earth
Between main circuit
terminal
Control circuit and
between control circuit
and earth
Above 500 MΩ
(DC 1000V Megger)
Above 2MΩ
(DC 500V Megger)
Table K Timing
Closing Time
Tripping Time
3 Cycle
≤80 ms
<35 ms
5 Cycle
≤80 ms
<50 ms
8) 3-Position Switch (disconnector or earth)
Operating Test
a. Test Method
Purpose of this test is to check
characteristics of ES and DS.
Measuring open and close time
b. Control Voltage: 80 - 110%
c. Standard of judgement:
Fully changes positions in 10 seconds
38
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Maintenance & Test Procedure
01.4IB.30000
Ch 12 Others
1)Cleaning
A.Post Processing of Bolt and Torque Valve
If the torque value of the gas compartment
is above 8.8 and uses a whisker coated bolt,
install using Loctite 222 or an anti reveling
device. For outside installation a normal bolt is
used. Torque values are represented in
Table M Class 8.8 or 9.8 Bolt and Nut and Table N
Class 10.9 Bolt and Nut.
Table M Class 8.8 or 9.8 Bolt and Nut
Torque (Nm)
Min
Max
M6
7
9
M8
18
22
M10
36
44
M12
63
77
M16
153
187
M20
297
363
Table N Class 10.9 Bolt and Nut
Torque (Nm)
Min
Max
M6
13
15
M8
32
40
M10
65
80
M12
90
110
M16
243
297
B.Processing of Contact Surface
a. Use liquid detergent to clean a foreign
substance on the surface
b. If the degree of pollution is high, use
grinder to clean the foreign substance.
C. Gas Monitoring System (HMD3)
!
CAUTION
Do not connect anything to the terminal
marked “NC”.
1) Channel Scan
Channel Skip
The selected channel is skipped when
“CHn” is OFF. Then the skipped channel LED
and the relay operations all become “OFF”
status.
2) Automatic Scan Mode
At the operating display, pressing the “SET”
key for more than 1 second turns to the
“Auto Scan” mode. While in the “Auto Scan”
mode, it scans the channels that are
“Chn = ON” and displays for approximately
2 seconds each. However, if a channel has a
certain problem, the “Auto scan” is stopped
and the problem status is displayed with
the channel locked.
Before fixing bolt, following operations are
required:
•
•
•
Others
Surface must be cleaned
Exposed surface bus must be grinded
(without rust resistant part)
Spread rust resistant grease
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39
Powell GIS™
38kV Gas Insulated Switchgear
01.4IB.30000
3) Manual Scan Mode
At the operating display, pressing the “SET”
key turns to the “Manual Scan” mode. While
in the manual scan mode, every time the
“SET” is pressed once, the channels that has
“CHn=ON” is scanned and displayed.
* n = 1~3 (Channel Number)
4) Change the Parameter
Table O Change the Parameter
Parameter Name <--> Parameter Value
When the
“parameter
name” and the
“parameter
value”
Are displayed
on the
indicator panel
in alternately
Parameter Value
Then only the
“parameter
value” is
displayed, and
at this time,
by using keys
to change the
value, after
which the “SET”
key is pressed
Parameter Name <--> Changed Parameter Value
The changed
parameter
values are
registered, and
the “parameter
name” and the
“parameter
value” are
displayed
alternate.
40
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Others
01.4IB.30000
Figure 31 HMD3
4
3
123.4
HDM3
P1
P2
< <<
P3
POWELL
Description
OPERATING ZONE lamp of each P1, 2, & 3 (Green)
2
LOW ZONE Lamp of each P1, 2, & 3 (Yellow)
3
Low-Zone Lamp of each P1, 2, & 3 (Red)
4
Channel indicating Lamp of each P1, 2, & 3 (Green)
5
PV Indicator
6
DOT Indicator
<<
Direction setting shift key
<<
1
SET: SET KEY
Setting level reduction key
<<
Others
<<
bar
<<
SET
No.
6
5
<<
2
1
Setting level increasing key
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41
Powell GIS™
38kV Gas Insulated Switchgear
01.4IB.30000
Figure 32 Wiring Connection Diagram
15
P3
L. LOW
ZONE
P3
LOW
ZONE
COM
P2
P2
L. LOW LOW
ZONE ZONE
14
1
2
3
16
4
5
6
17
- +
18
7
8
!
42
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-
20
FG
9
+
* Caution: Do not connect anything to “NC”
P3
4 - 20 mA
19
Power
100
E
13
- +
P2
4 - 20 mA
NC
12
+
P1
4 - 20 mA
COM
11
NC
P1
LOW
ZONE
COM
P1
L. LOW
ZONE
-
10
~
-240VDC/AC
50/60 Hz
Others
01.4IB.30000
Powell GIS™ (Gas Insulated Switchgear)
G81 - 36kV / 1250A, 2000A, 2500A, & 3150A / 40kA
G82 - 38kV / 1200A, 2000A, & 2500A / 40kA
June 2015
Powell Electrical Systems, Inc.
Service Division - Houston
PO Box 12818 • Houston, TX • 77217
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©2006 Powell Industries, Inc. • All rights reserved.
Tel: 713.944.6900 • Fax: 713.948.4569
powellind.com
info@powellind.com