ABB GE Entellysis User manual

INSTALLATION, OPERATIONS AND MAINTENANCE MANUAL
AKD-20 and Entellysis
Low voltage switchgear

These instructions convey information that pertains to both
AKD-20 and Entellisys low voltage switchgear. Information
that is applicable only to AKD-20 will be marked as (AKD-20
only) and information that is applicable only to Entellisys
will be marked as (Entellisys only). Unless marked otherwise,
information provided in this document is applicable to
both products.
These instructions do not purport to cover all details or
variations in equipment nor to provide for every possible
contingency to be met in connection with installation,
operation or maintenance. Should further information be
desired or should particular problems arise which are not
covered sufficiently for the Purchaser's purposes, the
matter should be referred to your ABB sales representative.
These instructions are intended for use by qualified
personnel only.

2
TABLE OF CONTENTS
Table of contents
03– 05 Introduction
06– 13 Receiving, handling and storage
14 – 29 Switchgear description
30– 49 Equipment installation
50 – 54 Installing and removing circuit
55– 57 Testing and inspection
58– 62 Operating the switchgear
63 Energizing the switchgear
64– 70 Maintaining the switchgear
71– 85 Appendices

3AKD-20 AND ENTELLYSIS LOW VOLTAGE SWITCHGEAR
1.1 General information
This manual contains procedures for receiving,
handling, storage, equipment installation,
operation, and maintenance and service of
AKD-20 and Entellisys low voltage switchgear.
Note: The personnel responsible for installing,
operating, and servicing this equipment should
be thoroughly familiar with the contents of
this manual.
Remarque: Le personnel chargé de l'installation, de
l'utilisation et de l'entretien de cet équipement doit
parfaitement maîtriser le contenu de ce manuel.
Before any installation work is performed,
thoroughly read and understand the material in this
instruction manual and the drawings furnished
with the equipment. The documentation shipped
with the equipment includes the Summary, Front
View, Elementary Diagram, Connection Diagram
and Instruction Book. This material is located in a
forward compartment tagged "INSTRUCTIONS IN
THIS COMPARTMENT." The documentation
provides all of the information necessary for
installation of the switchgear. When requesting
information from ABB, include the complete data
appearing on the equipment nameplate, requisition
number, summary number, and elementary
diagram number. The nameplate is located in
the lower left, front corner of the lineup.
When requesting information concerning any
specific item furnished with the switchgear, refer
to that item by description, part number, its
location within this manual, and any applicable
drawing number. Any material external to the
equipment, which may be required to meet local
codes (such as mats, screens, railings, etc.), is not
furnished by ABB.
If there are any questions or requirements not
covered in this manual or in the accompanying
drawings, please contact your ABB
sales representative.
1. Introduction

4
1. INTRODUCTION
1.2 Instruction book arrangement
Information and procedures in this instruction
book are divided as follows:
1. Introduction, gives a brief account of the
equipment's function and provides for general
information, and applicable data for the
equipment and its components.
2. Receiving, Handling and Storage, describes
procedures required for receiving and handling
the equipment and how to prepare it for
short-or long-term storage.
3. Description, describes the AKD-20 and
Entellisys low voltage switchgear and its various
components. Included are the section enclosure,
breaker compartment, circuit breakers,
instrument panels and instrument
compartments, bus bar arrangement, incoming
cable and busway, ground and neutral bus,
outdoor equipment, and auxiliary section.
This section also explains how the electrical
and mechanical components perform their
assigned functions.
4. Equipment Installation, provides the information
needed prior to installation, site location and
foundation requirements, and how to anchor
the equipment properly and safely. It also covers
installation of peripheral equipment and includes
information on electrical connections and
mechanical construction.
5. Installing and Removing Circuit Breakers, gives
a step-by-step procedure for lifting the breaker
from the floor, installing it on draw-out rails, and
moving it into the connected position. A further
procedure is given to withdraw a breaker, remove
it from the draw-out rails, and lower it to the
floor. Also included is a description of the
rejection system provided to avoid the
inadvertent use of an incorrect breaker
in a breaker compartment.
6. Testing and Inspection, reviews items which
should be tested or inspected prior to energizing
and operating the switchgear.
7. Operating the switchgear, covers how to
operate the breakers, and contains information
concerning draw-out provisions, doors, and
various accessories.
8. Energizing the switchgear, outlines the steps
to be taken before and during the electrical
energization of the equipment.
9. Maintaining the switchgear, provides
instructions for all preventive maintenance,
servicing, and lubrication information for the
switchgear equipment. Included is service and
maintenance data for the circuit breakers,
instrument compartments, instruments, bus
bar joints, and cable and busway connections.
This section also includes paint refinishing
requirements.
Appendices A, B, and C, contain information
concerning screw and bolt torque values,
circuit breaker rejection features, and circuit
breaker information.

5AKD-20 AND ENTELLYSIS LOW VOLTAGE SWITCHGEAR
1.3 Related publications
Addenda to this instruction book are the available
service and maintenance publications supplied
separately for circuit breakers, relays
and other devices not described in this
instruction book.
In addition to instruction books, the following
drawings will be supplied as required for
each order of AKD-20 and Entellisys
switchgear equipment:
1. General arrangement drawings, including front
view and floor plan.
2. Elementary and connection drawings (or wiring
routing tables) which indicate and identify test
and connection points including terminal blocks,
device studs, switch contact developments, and
remote connections.
3. Summary of switchgear equipment which is a list
of all the components furnished with the
switchgear, including the breakers, identified by
catalog number.
These are all the documents necessary to install,
operate, and maintain the equipment. One
complete set of drawings and instruction
books is shipped with the equipment.
—
Fig. 1.2
—
Fig. 1.2
Entellisys low voltage
switchgear
—
Fig. 1.1
—
Fig. 1.1
AKD-20 low voltage
switchgear

6
2. RECEIVING, HANDLING AND STORAGE
2.1 Receiving
Equipment packages
Every package leaving the factory is plainly marked
with the case number, requisition number, and
customer's order number. If the equipment has
been split for shipment, the section numbers of
the equipment enclosed in each shipping package
are identified.
Note: To avoid the loss of any parts when
unpacking, the contents of each container should
be carefully checked against the packing list before
discarding the packing material.
Remarque: Pour éviter toute perte de pièces au
cours du déballage, vous devez soigneusement
comparer le contenu de chaque boîte au bordereau
d'expédition avant de jeter le matériel d'emballage.
The contents of each shipping package are listed
on the Master Packing List. In addition, this list
includes the number of the shipping crate in which
miscellaneous parts needed to install and operate
the equipment (such as hardware, contact
lubricant, touch-up paint, breaker closing devices,
etc.) are located. Normally, such devices are packed
in a cardboard carton and the carton secured in an
empty switchgear compartment. See Fig. 2.1. If
such items are packed in a switchgear section
instead of a separate crate, the list will indicate
the appropriate section number in which they are
stored. Large items (such as breaker lifting devices
and dollies used with indoor equipment) will always
be shipped in separate crates or cartons.
See Fig. 2.2.
Inspecting for damage
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 equipment,
immediately perform a visual inspection to
ascertain if any damage has been sustained in
shipping or if there are any loose parts. Circuit
breakers may be shipped separately in individual
containers with the breaker in the open position.
Circuit breakers should be unpacked and visually
inspected for damage or loose parts as soon as
possible after they have been received.
Be sure to inspect all devices mounted or packed
inside compartments of each section to see if any
have been dislodged or damaged.
Filing a claim
If any damage is evident, or indication of rough
handling is visible, file a claim for damage at once
with the transportation company and notify your
ABB sales representative immediately. Information
on damaged parts, part number, case number,
requisition number, etc., should accompany
the claim.
2. Receiving, handling and storage

7AKD-20 AND ENTELLYSIS LOW VOLTAGE SWITCHGEAR
Spare compartment
Carton containing loose material
Shipping label listing contents of carton
1
2
3
—
Fig. 2.1
Packaging of loose
material for shipment
—
Fig. 2.2
Carton containing
breaker lifting device

8
2. RECEIVING, HANDLING AND STORAGE
2.2 Handling
Note: It is preferable to leave the shipping skids in
place under the switchgear until it reaches its final
location. The equipment should be installed in its
final location prior to installing the circuit breakers.
Remarque: Il est préférable de conserver les
cales d'expédition à leur place sous l'appareillage
électrique jusqu'à ce que celui-ci ait atteint sa
destination finale. Installez l'équipement dans
son emplacement final avant d'installer
les disjoncteurs.
Indoor enclosure lifting
The indoor switchgear sections are best handled by
lifting with a crane as shown in Fig. 2.3. Removable
lifting plates are provided, as standard equipment,
on the top of each switchgear section. To preserve
the external appearance of the equipment, it is
suggested that the lifting plates be left in place
except where adjacent equipment must be bolted
together, i.e. shipping splits, etc.
Utilize four equal length cables and an overhead
crane, each with a minimum load rating of twice the
weight of the switchgear. Estimated weights for
shipping splits appear on the Front View drawings.
Example: Switchgear section weight = 5,000
pounds. The crane and the four lift cables must
have a minimum load lifting capacity of
10,000 pounds.
Note: The angle between the cables and the
top of the equipment must be at least 45
degrees. If this is not possible because of
lack of headspace, spreader bars must be
used. Also, lift cables with greater load
capability may be necessary, depending
upon the angle between the cables and
the crane hook.
Remarque: L'angle entre les câbles et le haut
de l'équipement doit être d'au moins 45
degrés. Si l'espace est insuffisant pour cela,
vous devez utiliser des barres d'écartement.
Il est également possible que vous ayez à
utiliser des câbles de levage présentant une
capacité de charge supérieure, en fonction
de l'angle existant entre les câbles et le
crochet de la grue.
Connect a cable from the crane to the four lifting
plates located on the top-front and rear of the
switchgear (Fig. 2.3).
—
Fig. 2.3
Recommended method of
lifting indoor enclosure
—
Warning label is located
on each corner by
the lifting plate

9AKD-20 AND ENTELLYSIS LOW VOLTAGE SWITCHGEAR
—
Fig. 2.4
Location of lifting plates
of outdoor enclosure
—
Warning label is
located on each side
by the lifting plate
—
Front view
—
Fig. 2.5
Recommended method
of lifting outdoor
enclosure (using
cable spreaders)
—
Side view
Spreaders and
timber not
furnished with
equipment
Front Timber
1. Lifting plate
2. Lifting plate mounting bolts
3. Shipping skid
1
2
3

10
2. RECEIVING, HANDLING AND STORAGE
—
Fig. 2.6
Placing forklift tines
under equipment
shipping skid
—
Fig. 2.7
Placement of rollers
under shipping skid
Take up the slack in the lifting device very carefully
and manually stabilize the switchgear to prevent it
from rotating.
Warning: Do not stand under switchgear while it is
being moved. Serious injury may occur if the cables
or lifting device fail.
Avertissement: Ne restez pas sous l'appareillage
électrique tant que celui-ci est en mouvement. Des
blessures graves sont possibles en cas de chute
des câbles ou du dispositif de levage.
Caution: Gently lower the switchgear section onto
the level site location. If the switchgear is roughly
handled or jarred, it is possible to damage or
misalign internal components.
Prudence: Abaissez doucement l'appareillage
électrique sur un emplacement plat. Si vous
manipulez cet appareillage brutalement ou s'il subit
des secousses, vous risquez d'endommager ou de
désaligner ses composants internes.
Outdoor enclosure lifting
Methods of lifting outdoor switchgear sections are
much the same as for indoor equipment except the
lifting plates are provided at the base of the
structure. See Fig. 2.4.
If lifting outdoor switchgear sections, side support
timbers must be placed along the sides to prevent
any damage that could be caused by the lifting
cables. In addition, spreader bars must be inserted
between each lift cable, both front and rear.
Spreader bar locations must be on the sides and
above the switchgear equipment as shown in
Fig. 2.5. Proceed to lift and place the outdoor
switchgear utilizing all the precautions and
requirements that apply to lifting the indoor
switchgear. The lifting plates, Fig. 2.4, should
be removed after the equipment is permanently
anchored so passageways at the ends of the
equipment will not be obstructed.
Rollers
If crane facilities are not available, the equipment
may be moved into position by means of
construction rollers placed under the shipping
skids. The switchgear may be raised enough for the
placement of rollers by means of a fork lift or jack.
There should never be less than four rollers under
the equipment unless the line-up is less than five
feet long. Use one roller for each 18 inches of
equipment length.
Forklifts
When using a forklift to raise the line-up to position
rollers underneath, proceed as follows:
1. Expand forklift tines to their maximum
(widest) extension.
2. Carefully insert tines of forklift below one side of
the switchgear line-up at the approximate center
of the panel as shown in Fig. 2.6.
Note: Do not attempt to lift or move the
equipment with a forklift positioned
in the front or rear of the equipment.
Remarque: Ne tentez pas de soulever ou
déplacer l'appareil avec un chariot élévateur
positionné à l'avant ou à l'arrière de
l'équipement.
3. Raise equipment and position one roller under
the skids close to the raised end of the line-up.
4. Carefully lower the gear until it rests on the roller
as shown in Fig. 2.7.
5. Repeat the lifting process at the other end and
place the appropriate number of rollers under
the skids spacing them evenly across the width
of the line-up.

11 AKD-20 AND ENTELLYSIS LOW VOLTAGE SWITCHGEAR
Lifting plates must
be removed where
sections are joined
—
Front view
—
Side view
—
Side view
Roller
—
Fig. 2.8
Method of rolling
equipment into place
—
Fig. 2.9
Recommended
method of jacking
outdoor equipment
Wood beam
Note: If shipping skids are removed prior to final
placement of equipment, rollers may only be used
to move the equipment in a direction parallel to
the front.
Remarque: Si vous retirez les cales d'expédition
avant le placement final de l'équipement, vous
pouvez utiliser des rouleaux pour le déplacer,
uniquement dans le sens parallèle à l'avant.
6. Carefully lower the gear until it rests on the
rollers (Fig. 2.7).
7. While carefully pushing the switchgear to its final
site position, the rollers that are freed from the
rear of the switchgear are then repositioned at
the forward end. This procedure should be
continued until the switchgear is in its final
location (Fig. 2.8).
8. When the switchgear is in its final position,
remove all lug bolts holding the shipping skids
to the switchgear line-up.
9. Insert the tines of the forklift at one end of
the line-up, raise slightly, and remove the
loose rollers.
10. Lower the end of the gear carefully
to the floor.
11. Raise the other end of the line-up slightly and
remove the remaining roller at that end.

12
2. RECEIVING, HANDLING AND STORAGE
Jacks
Jacks may be used in place of forklifts to raise and
lower switchgear.
1. Place a jack under the front and rear corners
of one end of the line-up. Fig. 2.9 and 2.10 illustrate
the use of jacks with outdoor equipment.
Caution: Do not place jacks in any other location other
than the front and rear corners of the switchgear.
Doing so may result in serious damage to the
switchgear equipment.
Prudence: Ne placez pas de vérins ailleurs que dans les
coins avant et arrière de l'appareillage électrique. Vous
risqueriez d'endommager gravement l'appareillage.
2. Raise the switchgear evenly and just enough to
position a roller beneath the equipment. Gently
lower the switchgear onto the rollers. Repeat the
procedure at the opposite end of the switchgear,
raising the gear far enough to place the appropriate
number of rollers under the skids, spacing them
evenly across the width
of the line-up. Gently lower the gear onto
the rollers.
3. While carefully pushing the switchgear to its final
site position, the rollers that are freed from the rear
of the switchgear are then repositioned at the
forward end. This procedure should be continued
until the switchgear is in its final location.
4. When the switchgear is in its final position,
remove all lag bolts holding the shipping skids to
the switchgear line-up.
5. Place one jack at each corner, front and rear, of the
switchgear. Carefully raise the line-up evenly and
remove the rollers and the shipping skids. Evenly
lower the line-up to the floor and remove the jacks.
—
Partial front or rear
view of jacking
—
Partial side view
of jacking
—
Front view
—
Fig. 2.10
Recommended
method of jacking
outdoor enclosure
Jacking timber
not furnished with
switchgear
Cable
Rear or front
Jack here

13 AKD-20 AND ENTELLYSIS LOW VOLTAGE SWITCHGEAR
2.3 Storage
Switchgear
If it is necessary to store the switchgear equipment
for any length of time, the following precautions
should be taken to prevent corrosion or
deterioration.
1. Remove protective covering. Check thoroughly
for damage.
2. Store in a clean, dry, rodent-free location
with moderate temperature and provide
protective coverings to prevent dirt, water,
or other foreign substances from entering
the switchgear.
Caution: Remove all cartons, containers and any
other miscellaneous packaging and packing
material from inside the switchgear sections
before energizing any internal heaters. To prevent
fire, remove any plastic or polyethylene shrouding
from the switchgear sections before energizing any
internal heaters.
Prudence: Retirez tous les cartons, boîtes et
autres matériaux d'emballage de l'intérieur de
l'appareillage électrique avant d'allumer les
éléments thermiques internes. Pour éviter tout
risque d'incendie, retirez tout bâchage en plastique
ou polyéthylène de l'appareillage avant d'allumer
les éléments thermiques internes.
3. If dampness or condensation may be
encountered in the storage location, heaters
must be placed inside the switchgear sections to
prevent moisture damage. Approximately 250
watts of heat in each section is required. On
outdoor switchgear equipment, this may be
accomplished by making a temporary power
supply connection to the heaters already
installed in the equipment.
Caution: If the space heaters are to be
temporarily energized from external source,
it is important to remove the fuses on the
secondary side of the control power
transformer. This precaution is to prevent a
feedback of higher voltage to other portions
of the equipment through the CPT primary.
Prudence: Si les générateurs doivent être
temporairement allumés à partir d'une
source externe, il est important de retirer
les fusibles du côté secondaire du
transformateur d'alimentation. Ceci permet
d'éviter tout retour de tension plus élevée
vers d'autres parties de l'équipement via le
primaire du transformateur.
Circuit breakers
If circuit breakers are not to be placed into service
at once, remove them from their shipping cartons
and thoroughly inspect them for damage. If the
breakers are in satisfactory condition, replace the
breakers in their shipping cartons for storage. Do
not remove the circuit breaker shipping members
at this time.
Store the circuit breakers in a clean, dry location
in an upright position. They must be properly
supported to prevent bending of thestuds or
damage to any of the breaker parts. Do not remove
any protective grease until the circuit breakers are
ready to be installed. A plastic or canvas-type cover
should be provided to reduce the possibility of
damage to the breakers due to dust and water.

14
3. SWITCHGEAR DESCRIPTION
3.1 Receiving
This section contains a description of the
ABB low voltage switchgear. It also describes the
functions of the electrical and mechanical systems.
Figure 3.1 is a side view of a typical section
showing compartmentation.
3.2 Summary description
ABB low voltage switchgear is a freestanding
assembly of metal-enclosed sections containing
low voltage power circuit breakers, bus bars, cable
termination provisions, auxiliary power circuit
protective devices, controls, and instrumentation.
It may also be an integral part of a load center unit
substation, either singleended or double-ended.
3. Switchgear description
Intersectional
control wiring
trough
Breaker or
instrument
compartment
A
B
C
D
Breaker
compartment
Breaker
compartment
Breaker
compartment
Neutral bus
Vertical riser
bus bars
Cable termination
area
Breaker
compartment run
back and cable
termination
Main bus bars
Instrument
panel or
entelliguard
messneger
Vertical
control wire
gutter
Compartment
doors
Compartment
doors
Cable
compartment
doors
Ground bus
Enclosed trough
for external
control circuit
wiring
—
Fig. 3.1
Side-view section of
low voltage switchgear

15 AKD-20 AND ENTELLYSIS LOW VOLTAGE SWITCHGEAR
All of the primary circuit switching and protective
devices, secondary control and metering devices,
control fuses, instrument transformers, and
Entellisys instrumentation are mounted in the
enclosure. The breaker compartments include
draw-out rails, stationary breaker contacts,
interlocks, Entellisys Messenger, and necessary
control and indicating devices.
The breakers are provided with self-aligning
primary and secondary disconnecting contacts,
breaker locking mechanism, and integral trip unit.
The individual sections, compartments, and
devices are described in the following paragraphs.
Figure 3.2 is an outline of a typical single-ended
load center unit substation illustrating the
nomenclature used for all equipment.
A
A A
B
B B
C C
D D D
A
B
Primary section Transformer AKD-20 low voltage section
Load center unit substation
Shipping
package
Shipping
package
Transition
section
Shipping
package
Switch unit Breaker sections
—
Fig. 3.2
Outline of a typical load
center unit substation

16
3. SWITCHGEAR DESCRIPTION
3.3 Compartment area
The front enclosure of each section is divided into
individual compartments. These compartments
house either a low voltage power circuit breaker
or are used to mount instruments, control
components and other ancillary devices.
3.4 Instrument panel (AKD-20 only)
A standard instrument panel, Fig. 3.3, is located
above each breaker compartment eliminating
cross-hinge wiring. When required, optional
devices may be included and mounted on the
front face of the panel such as breaker control
circuit fuses, pilot lights, and a RELT switch.
Fuses for the charge, close, and trip circuits of the
electrically operated EntelliGuard G breakers are
mounted on the panel. Routine wiring inspections
and fuse checks or fuse replacements can be
performed with the breaker compartment door in
the closed position so that operators are protected
from the energized primary circuits.
1. Network interlock trip (set) fuse (optional)
2. Network interlock reset fuse (optional)
3. Circuit breaker close fuse
4. Circuit breaker trip fuse
5. Circuit breaker charge fuse
1. Control circuit fuses
2. Pilot lights
3. RELT switch and indication
1
2
3
—
Fig. 3.3
AKD-20 instrument panel
—
Fig. 3.3
—
Fig. 3.5
Entellisys EntelliGuard
messenger
Circuit breaker control fuse panel (Entellisys only)
Control fuses for the charge, close and trip circuits
of electrically operated EntelliGuard E circuit
breakers are mounted in the middle right side
of the cassette, behind the compartment door.
Control fuses for the SET and RESET coils of the
optional Network Interlock breaker accessory are
also mounted on the same panel. See Fig. 3.4.
3.5 EntelliGuard messenger (Entellisys only)
An EntelliGuard messenger, Fig. 3.5, is located
above each breaker compartment. The messenger
provides an interface between the circuit breaker,
the breaker compartment, and the Entellisys
system. For additional information and
instructions, reference DEH-501.
1
2
3
4
5
—
Fig. 3.4
—
Fig. 3.4
Entellisys circuit
breaker control
fuse panel

17 AKD-20 AND ENTELLYSIS LOW VOLTAGE SWITCHGEAR
3.6 Instrument/auxiliary compartment
An instrument/auxiliary compartment, Fig. 3.6,
is available as a standard feature. Relays, fuse
cutouts, and similar devices may be installed
in the instrument compartment or in
adjacent compartments.
Entellisys instrument/auxiliary compartment
(Entellisys only)
Each Entellisys low voltage switchgear lineup
contains standard devices housed within the
instrument compartments, Fig. 3.7. Two CPUs
(Central Processing Units) provide the processing
capability to support all switchgear functions. At
least one HMI (Human-Machine Interface) provides
user access to the Entellisys system. Network
switches provide communication links between the
CPU, the HMI, the EntelliGuard Messengers, and the
external world. A pair of uninterruptible power
supplies (UPS’s) and control power throw-over
relays supply highly reliable control power to these
system devices. For additional information and
instructions, reference DEH-501.
1. HMI (Human Machine Interface)
2. Network switches
3. Firewall security device
4. Cpu’s (Central processing units)
—
Fig. 3.6
Instrument/auxiliary
compartment
—
Fig. 3.7
—
Fig. 3.6
—
Fig. 3.7
IEntellisys instrument/
auxiliary compartment
4 2 13

18
3. SWITCHGEAR DESCRIPTION
3.7 Breaker compartment
Closed-door draw-out circuit breaker
compartments, Fig. 3.8, are standard construction
with all switchgear equipment. The circuit breaker
compartment doors remain closed and latched
while the breaker is racked out from the
CONNECTED position, through TEST, to
the DISCONNECTED position.
Breaker compartment doors do not have any
ventilation slots, thus protecting operators from
hot ionized gases which may be vented by the
breaker during circuit interruption. Additionally,
the breaker compartment, Fig. 3.9, is enclosed by
grounded steel barriers on the top, sides, bottom,
and front. In the back, a flame-retardant, track
resistant, glass-filled polyester base minimizes
the possibility of fault communication between
compartments or to the bus.
1. Access port to racking mechanism
2. Racking handle
3. Breaker position indicator
4. Circuit breaker door frame and gasket
1. Primary disconnect stab tip (typical)
2. Secondary disconnects
3. Position switch location (not shown)
—
Fig. 3.8
—
Fig. 3.8
EntelliGuard circuit
breaker compartment
—
Fig. 3.9B
—
Fig. 3.9B
Circuit breaker
compartment
for EntelliGuard
circuit breakers
—
Fig. 3.9A
Circuit breaker
compartment
for EntelliGuard
circuit breakers
1
2
3
4
2
3
1
1. Cassette side barrier
2. Cassette bottom and racking box
3. Racking arm
4. Draw-out rails
—
Fig. 3.9A
1
3
4
2

19 AKD-20 AND ENTELLYSIS LOW VOLTAGE SWITCHGEAR
The cassette racking arm slots engage fixed
racking anchor pins on the sides of the breaker.
As the racking arms are rotated by operation of
the racking handle, the breaker is pulled into
the compartment, and locked in its final
connected position.
The breaker should always be OPEN when it is
moved into or out of the CONNECTED position.
As a safeguard, a draw-out interlock will prevent
access to the racking mechanism unless the
breaker is OPEN.
All EntelliGuard circuit breakers are provided with a
mechanical rejection feature. See section 5 of this
instruction book for additional details.
Each circuit breaker compartment has four
positions as described in the Table 3.1.
Note: Items shown in Figs. 3.9, 3.12, and 3.13
(such as secondary disconnects and shutters)
are optional and may appear in any compartment
or not be included at all, depending on the
equipment specified.
Movement of the breaker between the
CONNECTED, TEST, and DISCONNECTED positions
is performed by the use of a racking handle, see
Fig 3.11, which engages the racking mechanism
mounted on the cassette. An optional remote
racking device is also available. Movement to the
WITHDRAWN position is manually performed after
opening the compartment door. These positions
are illustrated and described more fully in Section 5
of this instruction book.
Caution: The door should NOT be opened
when the circuit breaker is closed and in the
CONNECTED position. Although the breaker
compartment door may be opened in any
position, it is recommended that the door
only be opened when the breaker is in the
DISCONNECTED or WITHDRAWN position.
Prudence: Vous ne devez PAS ouvrir la
porte lorsque le disjoncteur est fermé
et en position CONNECTED (connectée).
Bien que vous puissiez ouvrir la porte du
compartiment d'un disjoncteur dans
n'importe quelle position, nous vous
recommandons de l'ouvrir uniquement
lorsque le disjoncteur est en position
DISCONNECTED (déconnectée) ou
WITHDRAWN (retirée).
Circuit breaker
position in
the cassette
Primary
disconnects
Secondary
disconnects
Shutter
assembly
Circuit breaker functionality Circuit breaker
door position
Connected Engaged Engaged Opened
• Breaker can be operated mechanically or
electrically.
• Breaker ready for service. Closed
Test Disengaged Engaged Closed
• Breaker can be operated mechanically or
electrically.
• Breaker and control circuits operations can
be tested and verified. Closed
Disconnected Disengaged Disengaged Closed
• Breaker can be operated only mechanically.
• Breaker cannot be removed from the circuit
breaker compartment. Closed
Withdrawn Disengaged Disengaged Closed
• Breaker can be operated
only mechanically.
• Breaker can be removed from
the compartment. Open
Table 3.1 - Description of the circuit breaker positions
1
2
1
1. Racking handle
2. Breaker position indicator
1. Primary disconnect
—
Fig. 3.10
EntelliGuard circuit
breaker (rear view)
—
Fig. 3.11
Racking handle
for movement
of EntelliGuard
circuit breakers
—
Fig. 3.11
—
Fig. 3.10