GE AKD-6 User manual

GENERA L@ ELECTRTC
GEK-72r01
8-77
INSTRUCTIONS
TYPE AKD-5
tOW VOLTAGE SWITCHGEAR
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GEK-7 2 | 0 l, Low V oh o ge Swifchgeor
CONTENTS
2
INTRODUCTION
RECEIVING, HANDLING, STORAGE 2
Receiving
Handling ........ 4
Removing Shipping Skid ..
Indoor Equipment Only .. 4
Storage 5
DESCRIPTION ... 6
Front Enclosure ... 6
BreakerCompartments.... ......6,7
Bus Compartm€nt . 8
Feeder Cable and Busway Compartment ........ 8
GroundBus.. 9
Outdoor Equipment 9
EQUIPMENT INSTALLATION 10
Prior to Installation 10
Location 10
FoundationRequirements..... 10
Anchoring 11
Assembly of Equipment ........ L2
INTRODUCTION
This book contains instructions for installing, operating
and maintaining AKD-6 Low Voltage Switchgear. It should
be read carefully before installation and initial operation.
For application and specification information, refer to
Bulletin GEA-10279.
Separate publications will be supplied for breakers, re-
lays or other devices not described in this manual.
In addition to instruction books, the following drawings
will be supplied:
l. Front View and Floor Plan drawings. These show
the general arrangement, height, recommended aisle
space, etc.
2. Summary of switchgear equipment. This is a partial
parts list, giving catalog numbers of all breakers, de-
vices, etc.
3. Electrical diagrams (when required).
All of these documents are needed for installation, op-
eration and maintenance of the equipment. They will be
found in a packet inside the auxiliary unit, or in one of the
instrument or breaker compartments.
Breaker Insertion and Removal ..... L6,L7
Breaker Operation 22
TESTING AND INSPECTION
RACKOUT MECHANISM OPERATION ......
KEY INTERLOCKS
For Breakers
For Fuse Rollouts
DOOR INTERLOCKS . . . . .
RACKOUT MECHANISM
PADLOCK DEVICES
MAINTENANCE .
Breaker and Instrument Compartrnents ......
Bus Compartment .
Feeder Cable and Busway Compartment . ....
Overall Switchgear
Paint Refinishing ..
RECEIVING, HANDLING AND STORAGE
RECEIVING
Every package leaving the factory is plainly marked with
case number, requisition number and customer's order
number. If the equipment has been split for shipment, the
unit numbers of the equipment enclosed in each shipping
package are identified.
All equipment leaving the factory is carefully inspected
and packed by personnel experienced in the proper handling
and packing of electrical equipment. Upon receipt of any
apparatus, make an inspection immediately for damage
sustained while en route.
Air circuit breakers are shipped separately in individual
cartons with the breaker in the open position. Circuit
breakers should be unpacked and inspected as soon as
possible after they have been received.
Be sure to inspect devices mounted in compartments in-
side the hinged doors.
If damage is evident, or indication of rough handling
is visible, file a claim for damage at once with the trans-
portation company. Notify the General Electric Company
Sales Office promptly. Information on damaged parts, part
number, case number, requisition number, etc., should ac-
compeny the claim.
22
24
26
26
27
2E
30
30
30
31
31
31
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fficse insfruclions do nol pwport lo cover oll delails or vorialions in eguipmenf nor lo provide lor evcry possible con.
tingcncy to b. ,r6t in connec'lion with instsllation, operclion or moinfsnonce. Should luilher inlormalion bc desired or
should parlicvlar problems orisc wfiich crc nof covered sufricicnlly for lhe pvrchoser's purposel, thc maltcr should bc
relcrred lo lhc Gcncrsl Elcclric Compony,

Low V ohage Swifchgeo r, GEK-7 21 0l
The contents of each shipping package are listed on the
Master Packing List. This list indicates the number of the
case in which miscellaneous parts needed to install and
operate the equipment (such as contact lubricant, touch-up
paint, breaker closing devices, etc.) are located If such
items are packed in a switchgear unit instead of a separate
crate, the list will indicate the appropriate unit number in
FRONT VIEIV
which they are stored.
Large items (such as hoist dollies and hoist carriages
used with indoor equipment) will always be shipped in
separate crates or cartons.
To avoid the loss of small parts when unpacking, the
contents of each case should be carefully checked against
the packing list before discarding the packing material;
JACK HEAE
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6
=a NOI FUFNISHED
/l wrrH EoUTPMEN?
/ | rrE 'ABLE 1
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stoE vtEw
RECOMMENDED METHOD OF JACKING
AFTER SHIPPII{G SKIDS ARE REMOVEO
ROLLEFS MAY 6E USEO TO ROLL
EOUIPMENT PARALLEL TO FRONT ONLY
NOT FUR}{ISHEO
WIYH EOUIPUE}IT
RECOMMENDED METHOD OF LIFTING
HOIST RAIL (FiONT ONLY}
WHETI FUFI{ISHED
FROTIT CHANNEL
FlG. I (0673D0500-265) Methods of Hondling Indoor Equipment

GEK-7 21 01, Low V oh age Swilchgeor
HANDLING
The switchgear units are best handled by crane. Remov-
able lugs are provided on top of the indoor switchgear.
When using a crane for lifting, a cable spreader must be
used to obtain a vertical pull on the lifting lugs, Recom-
mended lifting method is shown in Figure 1.
If practical, the shipping skid should be left on the
equipment until it is at or near its final location.
If crane facilities are not available, the equipment may
be moved into position by means of construction rollers
placed under the shipping skid. Where overhead clearance
is insufficient, the shipping skid may be removed and the
equipment moved by rollers placed under the three channels
under the equipment.
The skid is bolted to the equipment through the anchor
FRONT VIEW
RECOMMENDED
JACKING TIMBER
NOT FURNISHED
VJITH SWGF.
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'1 I
-lffill
"^"..) [v_L_\
PARTIAL
FRONT OR REAR VIEW
FON JACKING
RECOMMENDED METHOD OF JACKING
bolt holes used for final installation. The bolts in the rear
of the equipment may be reached by opening the rear doors,
To reach the bolts in the front, the'inner housing in the
bottom breaker compartment must be brought out to the
disconnected position. Fig. 3 shows the front bolt locations,
and the drawout procedure is explained on Pages 16 and 17.
CAUTION: IF THE SKID fI.4S BEEN RE-
MOVED, BE SURE THE ROLLERS USED
ARE SPACED SO THAT THE THREE CHAN-
NEI,S RES? O1V TOP OF THE ROLLERS. A
DIRECT APPLICATION OF THE ROLLERS
BETWEEN THE CHANNELS MAY TEAR OR
DISTORT THE ESUIPMENT,
Jacks may also be used to handle the equipment when a
crane is not available. See Figures 1 and 2.
NOT FUFNISHED
WITH SWGR.
srDE vlEw
METHOD OF LIFTING
JACK HERE
PARTIAL SIDE VIEW
FOR JACI(ING
FlG. 2 (0673D0500-266) Methods of Hondling Outdoor Equipment

Low V oltoge Swilchgeo r, GEK-7 21 0l
Methods of handling outdoor switchgear, shown in Fig-
ure 2,.are much the same as for indoor equipments except
that lifting plates are provided at the base of the structure.
The lifting plates should be removed after the equipment
is permanently anchored so that passageway at the ends
of the equipment will not be obstructed.
Store the circuit breakers in a clean, dry location in an
upright position. They must be properly supported to pre-
vent bending of the studs or damage to any of the breaker
parts. Do not remove any protective grease until they are
ready to be installed. A covering of kraft or other non-
absorbent paper will prevent dust from settling on the
breakers.
STORAGE
If breakers are not to be placed in service at once, remove
them from their shipping cartons and thoroughly inspect
them. If ever5rthing is in satisfactory condition, replace the
breakers in their shipping cartons for storage, Do not re-
(0673D0500-265) Locotion of skid bolts (ond onchor bohs)
in front of lndoor Equipment
move the shipping members at this time.
If it is necessary to store the equipment for any length
of time, the following precautions should be taken to pre-
vent corrosion or deterioration.
1. IJncrate the equipment. Check thoroughly for damage.
2. Store in a clean, dry, rodent free location with moderate
temperature and provide protective coverings'to pre-
vent dirt, water, or other foreign substances from enter-
ing the switchgear.
3. If dampness or condensation may be encountered in
the storage location, heaters must be placed inside the
units to prevent moisture damage. Approximately 250
watts of heat in each unit is required. On outdoor
switchgear this may be accomplished by making a
temporary power supply connection to the heaters al-
ready installed in the equipment.
CAUT|ON: REMOVE ALL CAR?OJVS AND
OTHER MISCELLANEOUS PACKING MA-
TERIAL FROM IJVS/DE THE UNITS BEFORE
ENERGIZING ANY HEATERS.
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FULL
HEIGHT
WIRE
TROUG
WHEN
WIREWAY,
BREAKER OR
INSTRUMENT
COMMRTMENT.
A
. MENT
I
CAB-E
BREAKER
COMPARTMENT
B
BREAKER
COMPARTMENT.
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FIG. 3FlG. 4 (0148A5073-0) Side View showing Comporrmentorion

GEK-7 21 01, Low Y oltage Swifchgeor
LOAD CENTER UNIT SUBSTATION
PRIMARY SECTIOI{
SI{IPPIIG ilCKAGE
General Electric AKD-6 Low Voltage Switchgear is a
free-standing assembly of metal-enclosed units of Power
Circuit Breakers and other auxiliary power circuit protec-
tive devices. It may also be a part of a single-ended or
double-ended Load Center Unit Substation.
Figure 4 is an outline of a side view of a typical unit
showing compartmentation, and Figure 5 is an outline of
a typical single-ended Load Center Unit Substation illus-
trating the nomenclature used for all equipment.
All of the switching and protective devices, control and
metering devices, control fuses and instrument trans-
formers are mounted in the enclosure. The breaker positions
are all of the drawout type. The breakers are provided with
self -coupling primary and secondary disconnecting contacts
and incorporate positive and indirect interlocks to insure
proper operating sequence. Each of the individual units,
compartments and devices is described in the following
paragraphs.
LOW VOLTAGE SECTION
ol5
FRONT ENCLOSURE
The front enclosure of each unit is divided into in-
dividual compartments. These compartments either house
a power circuit breaker or are used to mount instruments
and other protective devices and control components.
BREAKER COMPARTMENTS_AK BREAKERS_
MOUNTING CODE 2A, 3A, 4A, OR 5A
These breakers are supported within their compartments
by a rollout track which is part of the drawout mechanism
attached to the sides of the compartment. See Figure 6.
The drawout mechanism is shown in an exploded view,
Figure 19, and its operation is explained in detail under
"Drawout Mechanism Operation,"
SHIPPING PACKAGE SHIPPING PACKAGE
REAKER
UNITS
or3
FlG. 5 (0102C5207-O Outline of o typicol lood Cenfer Unit
Substqtion showing nomenclqture
DESCRIPTION

low Voftoge Swifchgeo r, GEK-721 0l
BREAKER COMPARTMENTS_AKR, AKRU, AKRT
BREAKERS-MOUNTING CODE 3A, 4A OR 5A
These breakers are supported on a rollout track in the
same manner as the AK breakers. However, since the
rackout mechanism is mounted on the breaker, there are
no jackshafts in the enclosure. See Figure 7. Racking arms
on both sides of the breaker frame engage the drawout
mechanism pins fastened to both sides of the compartment.
Note that extra items shown in Figures 6 and 7 (such as
secondary disconnects, position switches and ground sensor
secondary disconnects) may appear in any compartment
or not be included at all,.depending on the equipment spec-
ified. Also note that the bracing for the primary disconnects
shown in Figure 7 may be a single piece of insulating
material instead of three separate pieces.
A stop link is located on each side of all AK breaker
compartments. These links prevent an operator from manu-
ally pushing a breaker set on the tracks all the way into
the compartment when the racking mechanism is in the
connected position. In a compartment made for AKR
breakers, the latches that rest on the drawout mechanism
pins prevent the inner house from being manually moved
all the way into the compartment when no breaker is
set on the tracks.
All AK or AKR circuit breakers of the same type and
SECONDARY
DISCONNECTS
KEY INTERLOCK
TRACK LOCK
LINK
ROLLOUT
OPERA
SHAFT
INDICATOR
CURRENT
TRANSFORMER
rating which have duplicate wiring may be interchanged.
Each breaker compartment has four positions. They are
illustrated in Figure 18 and described below.
1. CONNECIED POSIIION-The breaker is in operating
position, both primary and secondary contacts made
and the door closed.
2. TESI POSITION-The primary contacts are separated by
a safe distance, but the secondary contacts are made.
Any breaker test not involving power may be made
in this position. The door may be closed in this posi-
tion, and must be closed before charging the spring
on a manually operated AKR breaker because an open
door will interfere with the breaker handle travel.
3. DISCONNECIED POSITION-Neither the primary nor the
secondary contacts are made, The door may be closed.
4. WITHDRAWN POSITION-The breaker is completely
out of its compartment ready for removal from the
equipment. The door must be open.
NOTE: ALTHOUGH THE BREAKER COM.
PARTMENT DOOR IUTAY BE OPENED IN
ANY POSITIOJV,Ijr IS RECOMMENDED THAT
THE DOOR ONLY BE OPENED WHEN THE
BREAKER /S IiY THE DISCOIVJVECT OR
WITHDRAWN POSITION.
CAUTION: NEVER OPEN THE BREAKER
DOOR WHEN THE BREAKER 'S CLOSED
AND IN THE CONNECTED POSITION.
STOP LINK
ROLLOUT
TRACK
JACK
SHAFT
CHAIN COVER
GROUND SENSOR
SECONDARY DISCONNECT
HA, 6 $012645) Typicol AK breoker comporlmenl

GEK-721 01, Low V oltage Swifchgeor
SECONDARY
DISCONNECTS
INNER HOUSE
PADLOCK DEVICE
INDICATOR
STOP LINK
KEY INTERLOCK
DRAWOUT MECHANISM
PIN
KEY INTERLOCK SLIDE
TRACK LOCK LINK
CURRENT
TRANSFORMER
ROLLOUT TRACK
GROUND SENSOR
SECONDARY DISCONNEC
POSITION SWITCH
AND COVER
COVER REQ'D. IN FUSED
BRKR. COMPT. ONLY
AMMETER
SWITCH
AMMETER
ULUJE
FUSES
INDICATING
LIGHTS
TEST
SWITCHES
TRIP
FUSES
{ ooon
- INTERLOCK
iir
FlG. 7 (8041 585) Typicol AKR breoker comportmenl
BUS COMPARTMENT
The bus compartment, between the front enclosure and
the rear cable compartment, contains all of the bus and
necessary bus supports for a particular section. This bus
compartment is isolated from the breaker and instrument
compartments by barriers. Isolation barriers between the
bus and cable compartments are optional. A typical ar-
rangement with an all-welded aluminum bus is shown in
Figure 8. Bolts are used for supports or at connections
which must be made in the field. Bolted copper buses are
optional.
On main breaker and tie breaker units the bus compart-
ment may be divided into an upper and lower section by
an optional isolation barrier. For main breakers, the upper
section contains the incoming line bus, fed from the bus
connections in the auxiliary unit, while the lower section
contains the main bus which connects with the other units.
Optional barriers at tie breakers isolate the two main bus
sections from each other.
Aluminum buses run continuouslv from one unit to
another. At shipping splits, or where connections are to be
made to other equipment during installation, provision
is mad" for a bolted joint. Copper buses have bolted joints
between each unit.
FEEDER CABLE AND BUSWAY COMPARTMENT
The rear cable and terminal compartment provides ade-
quate room for cable installation. Straight cable runs can
be made from the bars at the load side of the feeder
breakers to conduits entering above or below. Various
arrangements of single or double cable terminals are pro-
vided, depending upon the purchaser's requirements. One
typical terminal arrangement is shown in Figure 9,
An add-on unit, 18 inches deep, is available for extending
the cable compartment of the 22 inch wide unit. The com-
partment is extended when more than two busway runs
from above or below are used, and also when tlre quantity
of conduits leaving the unit cannot be accommodated in
the normal available space.

Low Voltoge Switchgeo r, GEK-72101
FlG, 8 (8042652) Bus ComDorfment
Conduits for large cables should be near the rear of the
cable compartment to provide space for bending these
cables as necessary.
Beside power cable connections, some equipments in-
clude an enclosed wiring trough on the left side (rear view)
of the cable compartment, providing for control circuit
connections. Terminal boards are provided in this trough
for making control wiring connections during installation.
A neutral bus is provided in the cable compartment on
switchgear designed for four wire systems. It consists of
bars with plated connection areas, and is installed at either
a height of about 18 inches from the floor or at about 6
feet. In most equipments the neutral bus is insulated from
ground.
GROUND BUS
CAUTION: IT IS VERY IMPORTANT THAT
ESUIPMENT BE ADEQUATELY GROUNDED
FOR SAFETY.
FlG. 9 $042651) Typicol Terminql Arrongement in o 4-high unir
The ground bus is bolted to the rear of the cable com-
partment near the bottom. A 4/0 connector is included on
each equipment for making the connection to the station
ground. A recommended location for this connection is
shown on the floor plan drawing.
Where AKD-6 switchgear is shipped in more than one
package, the ground bus must be connected at the ship-
ping splits.
OUTDOOR EQUIPMENT
Outdoor switchgear is constructed as a basic indoor
equipment completely enclosed in a weatherproof housing
with a walk-in front aisle, Figure 10. Space heaters are
provided in all outdoor equipments. There is one 115v. ac
250 watt heater located in the bus compartment of each
unit. These heaters should be energized at all times to
reduce condensation in the equipment.

GEK-7 21 0 1, Low V olt oge Swif chgeor
FfG. t0 $012659) Typicol Outdoor Shipping Section
EQUIPMENT INSTAIIATION
PRIOR TO INSTAII.ATION
Before any installation work is performed, study all
drawings furnished by G.E. Co. for the particular installa-
tion. These include arrangement drawings (front and plan
view), connection and elementary diagrams, installation
drawings and a summary of the equipment. When request-
ing information from the factory on any specific item
furnished with the equipment, refer to the item by sum-
mary and identification number wherever possible, Any
material external to the equipment which may be required
to meet local codes (such as mats, screens, railings, etc.)
is not furnished.
LOCATION
In locating AKD-6 switchgear, provide adequate aisle
space at the front and rear of the equipment, The recom-
mended aisle space is shown on the floor plan drawing,
and is in accordance with N.E.C. Article 110. Local codes
should be checked for any special aisle requirements.
The equipment should be placed in an area where clean
air is free to circulate around and above it. Since air is
taken into the units at the bottom and is exhausted at the
top, a location with good air flow will provide more effi-
cient operation.
FOUNDATION REQUIREMENTS
Indoor Equipment-Suitable means must be provided by
the purchaser for mounting and anchoring the switchgear
to the floor.
CAUTION: IF THE FOUNDATIO]V IS SUA-
] ECT TO V I B RATIONS, SPECIAL MOU NTING
MUST BE PROVIDED TO PREVENT THE
TRANSMITTAL OF VIBRATIONS TO THE
ESUIPMENT.
Although the equipment is furnished with built-in chan-
nels so that it can be mounted directly on a smooth, level
floor, it is recommended that recessed steel channels be
installed by the purchaser for supporting the equipment.
The floor channels under the front and rear switchgear
channels should be embedded in a level concrete slab with
their top surfaces flush with the finished floor. It is es-
sential that these steel channels be level and aligned with
each other prior to final anchoring, and that the center
switchgear channel be supported by the finish floor to avoid
distortion of the switchgear structure, If the gear is raised
above the floor level by the mounting channels, the center
switchgear channel must be supported at the same level.
If other equipment is installed in the same lineup, all
channels must be level and aligned with each other.
l0