GE Industrial Solutions EntelliGuard 800–2000 A Frames User Manual
g
DEH203 R02
EntelliGuard™ Power Circuit Breakers
800–2000 A Frames, 240–600 Vac
Maintenance Manual
WARNINGS
CAUTIONS
NOTES
DEH203
WARNINGS, CAUTIONS, AND NOTES
AS USED IN THIS PUBLICATION
Warning notices are used in this publication to emphasize that hazardous voltages, currents, or
other conditions that could cause personal injury are present in this equipment or may be associated with its use.
Warning notices are also used for situations in which inattention or lack of equipment knowledge
could cause either personal injury or damage to equipment.
Caution notices are used for situations in which equipment might be damaged if care is not taken.
Notes call attention to information that is especially significant to understanding and operating the
equipment.
This document is based on information available at the time of its publication. While efforts have
been made to ensure accuracy, the information contained herein does not cover all details or variations in hardware and software, nor does it provide for every possible contingency in connection
with installation, operation, and maintenance. Features may be described herein that are not present in all hardware and software systems. GE Consumer & Industrial assumes no obligation of
notice to holders of this document with respect to changes subsequently made.
GE Consumer & Industrial makes no representation or warranty, expressed, implied, or statutory,
with respect to, and assumes no responsibility for the accuracy, completeness, sufficiency, or
usefulness of the information contained herein. No warrantees of merchantability or fitness for
purpose shall apply.
The following are trademarks of GE Company:
EntelliGuard™, EntelliGuard Messenger™, Entellisys™
© Copyright 2005 GE Company
All Rights Reserved
i
EntelliGuard™ 800–2000 A Power Circuit Breakers
Table of Contents
Chapter 1. Introduction
1.1 Overview...................................................................................................................................................1
1.2 Inspection and Maintenance..................................................................................................................1
1.3 Renewal Parts...........................................................................................................................................1
Chapter 2. Description
2.1 Introduction ............................................................................................................................................3
2.2 Frame Sizes.............................................................................................................................................. 3
2.3 Operation ................................................................................................................................................3
2.4 Fused Models...........................................................................................................................................3
2.5 Mounting.................................................................................................................................................3
2.6 Trip Units................................................................................................................................................3
2.7 Interruption Ratings ...............................................................................................................................3
Chapter 3. Storage, Safety, and Maintenance
3.1 Storage.....................................................................................................................................................5
3.2 Safety........................................................................................................................................................5
3.3 Maintenance............................................................................................................................................5
Chapter 4. Breaker Operation
4.1 Operating Instructions............................................................................................................................7
Sequence of Operations ..................................................................................................................7
Operation of the Breaker................................................................................................................7
Padlock Operation...........................................................................................................................8
4.2 Control Wiring ........................................................................................................................................8
4.3 Breaker Interlocks ...................................................................................................................................8
Drawout Interlock............................................................................................................................ 8
Contact Interlock.............................................................................................................................8
Spring Discharge Interlock .............................................................................................................8
4.4 Equipment Interlocks.............................................................................................................................. 8
Chapter 5. Breaker Maintenance
5.1 Lubrication............................................................................................................................................11
5.2 Removing and Reinstalling the Breaker ..............................................................................................11
Removing the Breaker...................................................................................................................11
Installing the Breaker.................................................................................................................... 11
5.3 Slow Closing the Breaker ......................................................................................................................13
5.4 Separation and Reconnection of Front and Back Frames................................................................... 13
Separation of Front and Back Frames for EGS08, EGF08, and EGH08......................................13
Reconnection of Front and Back Frames for EGS08, EGF08, and EGH08.................................14
Separation of Front and Back Frames for EGX08, EGS16, EGF16, EGH16, EGS20, and
EGF20.............................................................................................................................................16
Reconnection of Front and Back Frames for EGX08, EGS16, EGF16, EGH16, EGS20, and
EGF20.............................................................................................................................................16
ii
EntelliGuard™ 800–2000 A Power Circuit Breakers
5.5 Breaker Mechanism Operation and Adjustment.................................................................................18
Trip Latch Adjustment..................................................................................................................19
Chapter 6. Contact Maintenance
6.1 Introduction ..........................................................................................................................................20
6.2 Arc Chute Removal and Replacement .................................................................................................20
Arc Chutes in EGS08, EGF08, and EGH08 Breakers....................................................................20
Arc Chutes in EGX08, EGS16, EGF16, EGH16, EGS20, and EGF20 Breakers............................20
6.3 Back Frame Assembly............................................................................................................................21
6.4 Replacement of Contacts ......................................................................................................................21
Contact Replacement on EGS08, EGF08, and EGH08 Breakers.................................................21
Contact Replacement on EGX08, EGS16, EGF16, EGH16, EGS20, and EGF20 Breakers..........24
6.5 Adjusting the Contacts..........................................................................................................................26
Contact Adjustment on EGS08, EGF08, and EGH08 Breakers....................................................26
Contact Adjustment on EGX08, EGS16, EGF16, EGH16, EGS20, and EGF20 Breakers............26
Chapter 7. Maintenance of Standard Parts and Assemblies
7.1 Primary Disconnects..............................................................................................................................28
Primary Disconnect Replacement on EGS08, EGF08, and EGH08 Breakers..............................28
Primary Disconnect Removal on EGX08, EGS16, EGF16, EGH16, EGS20, and EGF20
Breakers..........................................................................................................................................28
Primary Disconnect Installation on EGX08, EGS16, EGF16, EGH16, EGS20, and EGF20
Breakers..........................................................................................................................................29
7.2 Secondary Disconnect...........................................................................................................................31
Secondary Disconnect Removal....................................................................................................31
Secondary Disconnect Installation................................................................................................31
7.3 Flux Shifter ............................................................................................................................................32
Flux Shifter Adjustment.................................................................................................................32
Removing the Flux Shifter ............................................................................................................32
Installing the Flux Shifter..............................................................................................................32
7.4 Draw-Out Mechanism............................................................................................................................34
Draw-Out Mechanism Removal ....................................................................................................34
Draw-Out Mechanism Installation................................................................................................34
Draw-Out Mechanism Adjustment................................................................................................34
7.5 Escutcheon.............................................................................................................................................36
Escutcheon Removal .....................................................................................................................36
Escutcheon Installation.................................................................................................................36
7.6 Charging Handle...................................................................................................................................36
Removing the Charging Handle...................................................................................................36
Installing the Charging Handle....................................................................................................36
Table of Contents
Chapter 8. Accessory Maintenance
8.1 Bell Alarm with Lockout........................................................................................................................38
Removing the Bell Alarm with Lockout........................................................................................38
Installing the Bell Alarm with Lockout.........................................................................................39
8.2 Shunt Trip .............................................................................................................................................39
iii
EntelliGuard™ 800–2000 A Power Circuit Breakers
Table of Contents
Removing the Shunt Trip............................................................................................................. 40
Installing the Shunt Trip ..............................................................................................................40
8.3 Charging Motor..................................................................................................................................... 41
Removing the Charging Motor.....................................................................................................41
Installing the Charging Motor...................................................................................................... 41
Removing the Motor Cut-Off Switch ............................................................................................41
Installing the Motor Cut-Off Switch..............................................................................................41
Adjusting the Motor Cut-Off Switch............................................................................................. 43
8.4 Remote Close......................................................................................................................................... 43
Removing the Remote Close......................................................................................................... 44
Installing the Remote Close.......................................................................................................... 44
8.5 Open-Fuse Lockout ...............................................................................................................................45
Removing the Open-Fuse Lockout, 800 A and 1600 A Breakers..................................................45
Installing the Open-Fuse Lockout, 800 A and 1600 A Breakers................................................... 45
Removing the Open-Fuse Lockout, 2000 A Breakers...................................................................45
Installing the Open-Fuse Lockout, 2000 A Breakers ....................................................................46
8.6 Remote Charge-Indication Switch........................................................................................................47
Removing the Remote Charge-Indication Switch........................................................................ 47
Installing the Remote Charge-Indication Switch.........................................................................47
8.7 Network Interlock..................................................................................................................................48
iv
EntelliGuard™ 800–2000 A Power Circuit Breakers
List of Figures
1. Front of the EntelliGuard circuit breaker, showing the locations of standard and optional
features....................................................................................................................................................... 2
2. Elementary diagram of the breaker control circuits. ...............................................................................9
3. Location of the secondary disconnect...................................................................................................... 9
4. Installing the breaker into the compartment......................................................................................... 12
5. Disconnecting the closing spring assembly. ........................................................................................... 13
6. Removing or installing the secondary disconnect ................................................................................. 14
7. Movable contact connection to the breaker main shaft on EGS08, EGF08, and EGH08 breakers...... 14
8. Separating the front and back frames on EGS08, EGF08, and EGH08 breakers.................................. 15
9. Movable contact connection to the breaker main shaft on EGX08, EGS16, EGF16, EGH16,
EGS20, and EGF20 breakers. .................................................................................................................. 16
10. Separating the front and back frames on EGX08, EGS16, EGF16, EGH16, EGS20, and EGF20
breakers.................................................................................................................................................... 17
11. Breaker mechanism in the CLOSED position. ...................................................................................... 18
12. Breaker mechanism in the TRIPPED position. ..................................................................................... 18
13. Breaker mechanism in the RESET position........................................................................................... 18
14. Adjusting the trip latch. .......................................................................................................................... 19
15. Typical back frame assembly, EGS08, EGF08, and EGH08. .................................................................. 21
16. Typical back frame assembly, EGX08, EGS16, EGF16, EGH16, EGS20, and EGF20............................ 21
17. Upper (stationary) contact assembly for EGS08, EGF08, and EGH08 breakers................................... 22
18. Lower (movable) contact assembly for EGS08, EGF08, and EGH08 breakers...................................... 22
19. Removal and installation of contact assemblies on EGS08, EGF08, and EGH08 breakers .................. 23
20. Removal and installation of contact assemblies on EGX08, EGS16, EGF16, EGH16, EGS20, and
EGF20 breakers........................................................................................................................................ 25
21. Stationary main and intermediate contact styles. ..................................................................................25
22. Replacement of stationary arcing contacts............................................................................................. 25
23. Contact adjustment on EGS08, EGF08, and EGH08 breakers............................................................... 26
24. Contact adjustment on EGX08, EGS16, EGF16, EGH16, EGS20, EGF20 breakers. ............................. 27
25. Primary disconnect assembly for EGS08, EGF08, and EGH08 breakers ............................................... 28
26. Primary disconnect assembly for EGX08, EGS16, EGF16, EGH16, EGS20, and EGF20 breakers........ 28
27. Primary disconnect removal and installation on EGS08, EGF08, and EGH08 breakers...................... 29
28. Primary disconnect removal and installation on EGX08, EGS16, EGF16, EGH16, EGS20, and
EGF20 breakers........................................................................................................................................ 30
29. Primary disconnect adjustment on EGX08, EGS16, EGF16, EGH16, EGS20 and EGF20 breakers. ....30
30. Secondary disconnect.............................................................................................................................. 31
31. Secondary disconnect terminal numbering. ..........................................................................................31
32. Removing or installing the secondary disconnect. ................................................................................ 31
33. Flux shifter............................................................................................................................................... 32
34. Flux shifter adjustment............................................................................................................................ 32
35. Removal or installation of a flux shifter ................................................................................................. 33
36. Draw-out racking mechanism. ................................................................................................................ 34
v
EntelliGuard™ 800–2000 A Power Circuit Breakers
List of Figures
37. Draw-out mechanism adjustment............................................................................................................34
38. Draw-out racking mechanism removal and installation.........................................................................35
39. Escutcheon kit and related parts. ............................................................................................................36
40. Charging handle ......................................................................................................................................37
41. Charging handle removal and installation.............................................................................................37
42. Charging handle mounting detail ..........................................................................................................37
43. Bell Alarm with Lockout connections on the secondary disconnect. ....................................................38
44. Bell Alarm with Lockout accessory kit. ....................................................................................................38
45. Bell Alarm with Lockout installation or removal. ...................................................................................38
46. Front view of the Bell Alarm with Lockout installation, showing the breaker mechanism tab
engaging the mounting plate slot............................................................................................................39
47. Orientation of the label on the Bell Alarm module for installation. .....................................................39
48. Shunt Trip connections to the auxiliary switch and secondary disconnect. .........................................40
49. Shunt Trip accessory kit...........................................................................................................................40
50. Shunt Trip module removal and installation. ........................................................................................40
51. Charging Motor and cut-off switch..........................................................................................................41
52. Removal and installation of the Charging Motor and cut-off switch.....................................................42
53. Cut-off switch adjustment.........................................................................................................................43
54. Remote Close accessory kit.......................................................................................................................43
55. Remote Close installation and removal...................................................................................................44
56. Open-Fuse Lockout accessory ..................................................................................................................45
57. Open-Fuse Lockout connections to the secondary disconnect for EGF-20 breakers.............................45
58. Open-Fuse Lockout installation and removal .........................................................................................46
59. Remote charge-indication switch............................................................................................................47
60. Remote charge-indication switch removal and installation...................................................................47
61. Remote charge-indication switch side view.............................................................................................47
62. Network Interlock connections to the secondary disconnect. ................................................................48
63. Network Interlock assembly mounting to the circuit breaker bottom frame .........................................49
64. Network Interlock module fastening to the mounting plate. .................................................................49
65. Manual reset assembly mounting............................................................................................................49
66. Trip paddle and set lever gap calibration .............................................................................................49
vi
EntelliGuard™ 800–2000 A Power Circuit Breakers
List of Tables
1. Recommended service intervals, in number of ON-OFF operations, for EntelliGuard breakers........... 1
2. Breaker interruption ratings..................................................................................................................... 4
3. Sequence of operations that may be performed with the EntelliGuard circuit breaker......................... 7
4. Secondary disconnect terminals with standard and optional connections. ......................................... 10
5. Key to numbered parts in Figure 11, Figure 12, and Figure 13 ............................................................. 18
6. Bell Alarm with Lockout wires and corresponding secondary disconnect terminals. ..........................39
7. Catalog number and operating voltage for the Shunt Trip accessory. ................................................. 40
8. Catalog number and operating voltage for the Charging Motor accessory.......................................... 41
9. Catalog number and operating voltage for the Remote Close accessory.............................................. 43
vii
EntelliGuard™ 800–2000 A Power Circuit Breakers
Chapter 1. Introduction
1.1 Overview
These instructions describe the procedures for maintenance and operation of EntelliGuard 800-2000 ampere
low-voltage power circuit breakers. Figure 1 is a front view
of the breaker, with key features indicated.
The proper use, care, and maintenance of these breakers
is important both from the safety aspect of protecting personnel and for minimizing equipment damage when
faults occur. Persons who apply, use, and service these
breakers should be familiar with the information presented in this publication.
WARNING: Before inspecting or beginning
any maintenance work on a circuit breaker, the
breaker must be in the OPEN position and dis connected from all voltage sources, both power
and control.
AVERTISSEMENT: Avant d’inspecter ou de
débuter tout travail de maintenance d’un disjoncteur, celui-ci dout être en position OPEN et
débranché de toutes les sources de voltage, à la
fois de puissance et de contrôle.
1.2 Inspection and Maintenance
Circuit breakers should be maintained under a systematic
program. Take each breaker out of service periodically for
inspection and maintenance to help establish high reliability in service. This policy is facilitated by keeping one
or more spare breakers to install in place of breakers
requiring maintenance. Keeping a stock of recommended
renewal parts ensures that maintenance work can be done
quickly.
The frequency at which an individual breaker should be
inspected depends on the circumstances of its use. Table 1
lists the ANSI-recommended service interval with the GErecommended interval for EntelliGuard breakers.
EntelliGuard breakers should be inspected after every
short circuit interruption, after every number of ON-OFF
operations given in Table 1, or every two years, whichever
comes first. EntelliGuard breakers have been built and
tested to operate reliably with inspections at twice the
ANSI interval, thus saving time and money by reducing
breaker downtime.
Source of
Recommendation 800 A Frame
ANSI 1750 500
EntelliGuard, no
load
EntelliGuard, at
frame rating
Table 1. Recommended service intervals, in number of ON-OFF
operations, for EntelliGuard breakers.
If a breaker is installed in an area of high humidity or a
dusty atmosphere, it should be inspected more often.
Monthly inspections might be warranted for a breaker
operated under severe conditions.
Always inspect the breaker after it has interrupted a short
circuit or ground fault.
A standard inspection should consist of the following
steps:
1. Visual Check – Look for dirt, grease, or other
foreign material on all breaker parts. Check
insulating surfaces for conditions that could
degrade insulating properties, such as cracks or
evidence of overheating. Check for foreign objects
on the bottom of the breaker compartment. Check
for loose or damaged control wiring and for similar
problems.
2. Operation – Observe a few close-open operations
using the operating handle. If a breaker is seldom
operated, such that it remains open or closed for six
months or more, open and close the breaker several
times in succession.
3. Interlocks – During the operational check, verify
that the safety interlocks are working properly.
4. Arc Chutes and Contacts – Inspect the arc chutes
and contacts for excessive burning or breakage.
Check the amount of contact depression or wipe
when the breaker is closed.
5. Accessories – Verify that the various accessories are
working properly.
3500 1000
2800 800
1600 and
2000 A Frames
1.3 Renewal Parts
Many of the parts and assemblies contained in
EntelliGuard breakers are available as replacement parts.
See DEF004 for a complete listing.
1
EntelliGuard™ 800–2000 A Power Circuit Breakers
A B C D E F G H J K
Chapter 1. Introduction
Figure 1. Front of the EntelliGuard circuit breaker, showing the locations of standard and optional features.
A Indicator: DISC (white)
TEST (white)
CONN (white)
B Indicator: CHARGED (yellow)
DISCHARGED (white)
C Indicator: CLOSED (red)
OPEN (green)
D CLOSE button (black)
E OPEN button (red)
F Padlock provision
G Catalog number, rating, and date code nameplate
H Manual charging handle
J Bell Alarm with Lockout target/RESET button
K Draw-out racking screw (behind cover)
2
EntelliGuard™ 800–2000 A Power Circuit Breakers
Chapter 2. Description
2.1 Introduction
EntelliGuard low-voltage power circuit breakers control
and protect power circuits up to 600 volts. They will safely
switch loads and automatically clear circuits during abnormal conditions when used with the EntelliGuard
Messenger™. These include short circuits, sustained
overloads, and ground faults.
EntelliGuard breakers contain a “quick-make, quickbreak” mechanism, which stores energy in a closing spring
for quick release. During closing, some energy is
transferred to an opening spring to be used subsequently
for fast tripping.
The three main functional components of the breaker are
its mechanism, an assembly consisting of the conductive
components, and the interrupter.
The mechanism is designed to receive energy, store it, and
later deliver it to close the breaker contacts. It must be able
to reverse the closing operation at any point upon receipt
of a trip signal from the EntelliGuard Messenger (that is,
it must be “trip-free”). Finally, it must also open a closed
breaker quickly enough to minimize contact erosion and
to effectively transfer the arc to the arc chutes.
The current-carrying components are assembled on the
back frame, which provides the required mechanical support and insulating structure. The conductive components are the studs for external connections, the movable
and stationary contact sets, and the pivots for the movable
contacts.
The interrupter components are the arcing contacts, the
arc runners mounted on the back base, and the removable
arc chute assemblies.
In addition to these basic components, a breaker may be
equipped with a combination of accessories and interlocking devices.
breaker, and a Shunt Trip to open the breaker. External
control power is required to energize the motor and its
control circuit. All breakers are equipped with a manual
charging handle so that the closing springs can be
charged without motor control power.
2.4 Fused Models
Internally fused breakers are available in 800- and 1600ampere frame sizes. They are not interchangeable with
unfused breakers, since fused breakers require deeper
compartments to accommodate the fuses.
2.5 Mounting
EntelliGuard breakers are designed for draw-out
mounting. Draw-out breakers are easily installed into or
removed from their switchgear cubicle. They are
equipped with a racking mechanism, which is used to
insert or withdraw the breaker, and primary and
secondary disconnects, which connect and disconnect
automatically.
2.6 EntelliGuard Messenger™
EntelliGuard low-voltage power circuit breakers are
intended for use in Entellisys™ Low-Voltage Switchgear
only. The breaker frames do not contain trip units or
current transformers. Thus, the EntelliGuard circuit
breaker must be used in concert with the EntelliGuard
Messenger and the current transformers mounted within
the switchgear cubicle. For installation and operation of
the EntelliGuard Messenger, see DEH231 and DEH234.
2.7 Interruption Ratings
2.2 Frame Sizes
The EntelliGuard breakers covered in this manual are
available in 800-ampere, 1600-ampere, and 2000-ampere
frame sizes. These values represent the maximum
continuous-current rating of each frame. In addition,
each breaker carries a specific rating that is determined by
the current sensor ampere rating or the maximum setting
of the EntelliGuard Messenger™ with which it is used.
2.3 Operation
EntelliGuard breakers are available with either manual or
electric operation. The mechanism closing springs of
manually operated breakers are charged by operating the
charging handle on the front of the breaker.
Electrically operated breakers contain an electric
Charging Motor that charges the closing springs, a
Remote Close accessory with antipump to close the
Table 2 lists the short-circuit current that each breaker
type is rated to interrupt for each maximum rated voltage.
3
EntelliGuard™ 800–2000 A Power Circuit Breakers
Chapter 2. Description
Rated AC
Voltage,
Nominal
(max)
600
(635)
480
(508)
240
(254)
Short-Circuit RMS Symmetrical kA
Breaker
Type
EGS-08
EGH-08
EGX-08
EGS-16
EGH-16
EGS-20
EGS-08
EGH-08
EGX-08
EGS-16
EGH-16
EGS-20
EGS-08
EGH-08
EGX-08
EGS-16
EGH-16
EGS-20
Short-Time
Withstand
30
42
50
42
65
65
30
42
65
50
65
65
30
42
65
50
65
65
With
Inst. Trip
30
42
50
42
65
65
30
42
65
50
65
65
42
50
65
65
65
65
Without
Inst. Trip
30
42
50
42
65
65
30
42
65
50
65
65
30
42
65
50
65
65
Table 2. Breaker interruption ratings.
(EGF-08/16/20 rated at 200kA).
4
EntelliGuard™ 800–2000 A Power Circuit Breakers
Chapter 3. Storage, Safety, and Maintenance
3.1 Storage
The breaker should be put into service immediately in its
permanent location. If this is not possible, the following
precautions must be taken to ensure proper storage of the
breaker
• Protect the breaker against condensation, preferably
by storing it in a warm, dry room, since water absorption has an adverse effect on the insulating parts.
• Store the breaker in a clean location free from corrosive gases or fumes. It is particularly important to
protect the equipment from moisture and cement
dust, as this combination is corrosive to many parts.
CAUTION: If the breaker is stored for any
length of time, inspect it periodically to ensure
that steel parts have not begun to rust and to
ensure good mechanical condition. If the
breaker has been stored under unfavorable
atmospheric conditions, it must be cleaned and
dried before being placed in service.
ATTENTION: Si le disjoncteur est remisé pour
peu importe la période de temps, inspectez-le
périodiquement afin de vous assurer que les
pièces d’acier n’ont pas commencé à rouiller et
de vous assurer de leur bonne condition
mécanique. Si le disjoncteur a été remisé à des
conditions atmosphériques défavorables, il doit
être nettoyé et séché avant d’être mis en service.
3.2 Safety
Each facility must maintain a safety program for the protection of personnel, as well as other equipment, from the
hazards associated with electrical equipment.
The following requirements are intended to augment a
facility’s safety program, not to supplant local responsibility for devising a complete safety program. The following
basic industry-accepted safety requirements are applicable
to all major electrical equipment, such as switchgear and
switchboards. General Electric neither condones nor
assumes any responsibility for practices that deviate from
these requirements.
1. All conductors must be assumed to be energized
unless their potential has been measured as ground
and suitable grounding conductors have been
applied to prevent energizing. Many accidents have
been caused by back feeds from various sources.
2. Although interlocks are provided to reduce some of
the risks, each individual’s actions are essential to
prevent accidents when performing service or main tenance. Each person’s knowledge, mental awareness, and planned and executed actions often
determine if an accident will occur. The most
important principle for avoiding accidents is that all
associated personnel carefully apply a thorough
understanding of the specific equipment with
regard to its purpose, its construction, its operation,
and situations that could be dangerous.
3. All personnel associated with installation, operation,
and maintenance of electrical equipment, such as
power circuit breakers and other power-handling
equipment, must be thoroughly instructed, with
periodic retraining, about power equipment in general and the specific equipment with which they will
be working in particular. Instruction books, actual
devices, and appropriate safety and maintenance
procedures, such as OSHA publications, the
National Electrical Safety Code (ANSI C2), the
National Electrical Code, and NFPA 7 OB Electrical
Equipment Maintenance, must be closely studied
and followed. During actual work, supervisors
should audit procedures to ensure conformance.
4. Excellent maintenance is essential for reliability and
safety of all electrical equipment. Industry publications of recommended maintenance practices, such
as ANSI/NFPA 70B, Electrical Equipment Maintenance,
are readily available.
3.3 Maintenance
Both long- and short-term maintenance of all electrical
equipment is essential for reliability and safety. Maintenance programs must be well-planned and carried out
consistently with both industry experience and the manufacturer’s recommendations. The local environment must
always be considered such programs, including such
variables as ambient temperature, extreme moisture,
number of operations, corrosive atmosphere, significant
insect problems, and any other unusual or abusive condition of the application.
One of the critical service activities, sometimes neglected,
is the calibration of various control devices. These monitor conditions in the primary and secondary circuits,
sometimes initiating emergency corrective action, such as
opening or closing circuit breakers. In view of the vital
roles of these devices, it is important to follow a periodic
test program.
General Electric recognizes that the interval between periodic checks will vary, depending on the environment, the
type of device, and the customer’s experience. GE recommends that, until the customer has accumulated sufficient
experience to select a test interval best suited to the local
requirements, all significant calibrations be checked at
one- to two-year intervals.
Operation and maintenance guides supplied by manufacturers normally address components that require service
or maintenance during the useful life of the equipment.
However, they cannot include every possible part that
could require attention, particularly over a long service
period or under adverse conditions. Maintenance
personnel must be alert to deterioration of any part of the
5
EntelliGuard™ 800–2000 A Power Circuit Breakers
Chapter 3. Storage, Safety, and Maintenance
supplied switchgear, taking such action as necessary to
restore it to serviceable status.
If additional assistance is required in the planning and
performance of maintenance, contact GE Installation and
Field Service (1-888-434SERV / 1-888-434-7378) to
undertake the maintenance or to provide technical
assistance, such as the latest publications.
The performance and safety of this equipment may be
compromised by the modification or supplied parts or
their replacement by non-identical substitutes. All such
design changes must be qualified to ANSI/IEEE Standard
C37.59.
Each customer should methodically keep written maintenance records as an aid in future service planning and
equipment reliability improvement. Unusual experiences
should be promptly reported to General Electric (1-888GER-ESOLve).
6
EntelliGuard™ 800–2000 A Power Circuit Breakers
Chapter 4. Breaker Operation
4.1 Operating Instructions
Sequence of Operations
The sequence of operations that may be performed on the
circuit breaker are listed in Table 3.
Operation of the Breaker
Manually Charging the Closing Springs
Pull the operating handle down about 90° (until it stops)
six times to fully charge the closing springs. This will
not close the breaker contacts. The charge indicator will
show CHARGED on a yellow background.
NOTE: The breaker cannot be closed unless
the springs are fully charged and the handle is
stored fully in.
NOTE: Le disjoncteur ne peut être fermé à
moins que les ressorts ne soient pleinement
chargés et que la poignée ne soit pleinement
rentrée.
Electrically Charging the Closing Springs
If the breaker is equipped with the (optional) Charging
Motor, the closing springs may also be charged with any
the following methods:
• With the breaker in the TEST position, install the
motor fuse in the fuse holder in the upper left corner
of the breaker compartment.
• Operate the Charging Motor by applying the rated
voltage to secondary disconnect terminals 8 and 17.
Power to the motor is removed automatically by a
cutoff switch when the springs are fully charged.
• If power is lost during the charging cycle, finish
charging the springs by cycling the charging handle
until the indicator shows CHARGED on a yellow
background.
The closing springs will automatically recharge after
closing if control power is maintained at terminals 8 and
17.
Open/Closed
Indicator
OPEN Open DISCHARGED Discharged Mechanism may be charged
OPEN Open CHARGED Charged Contacts may be closed
CLOSED Closed DISCHARGED Discharged
CLOSED Closed CHARGED Charged Contacts may be opened
Main Breaker
Contacts
Charge
Indicator
Condition of Close
Table 3. Sequence of operations that may be performed with the EntelliGuard circuit breaker
Closing the Breaker
Close the breaker contacts with any of the following
methods:
• Depress the CLOSE button on the front of the
breaker.
• Close the breaker using the Entellisys™ HMI.
• Energize the (optional) Remote Close accessory by
applying the rated voltage to secondary disconnect
terminals 9 and 18.
If the breaker is closed electrically and the closing voltage
is maintained, an antipump device prevents a second closing operation on the breaker in the event it is tripped
OPEN. The closing impulse must be released for 1 to 2.5
seconds and reapplied before a second closing operation
can occur.
If the closing voltage is applied while the closing springs
are not fully charged, the Remote Close coil energizes, but
operation of the closing mechanism is blocked. The
closing voltage must be removed and reapplied when the
springs are fully charged to close the breaker.
A mechanical interlock prevents the closing springs from
discharging if an attempt is made to close an already
CLOSED breaker.
NOTE: The main breaker contacts cannot be
closed if any of the following conditions apply:
• The draw-out mechanism is in any position other than TEST or CONN, as displayed on the breaker position indicator.
• The (optional) Bell Alarm with Lockout
was not reset after an overcurrent lockout.
• The (optional) Open Fuse Lockout was
not reset after replacement of a blown fuse.
• The (optional) Network Interlock was not
reset after a set operation.
These conditions must be corrected before the
breaker can be closed. Attempts to close the
breaker before these conditions are corrected
may result in discharge of the closing springs
without closing the main contacts.
Springs
Mechanism may be recharged or
Contacts may be opened
Next Permissible
Operating Function
7
EntelliGuard™ 800–2000 A Power Circuit Breakers
Chapter 4. Breaker Operation
NOTE: Les contacts principaux du disjoncteur
ne peuvent être fermés si l’une ou l’autre des
conditions suivantes s’appliquent:
• Le mécanisme de retrait du ressort est en
tout autre position que: TEST ou DISC, tel
que montré à la position indicatrice du disjoncteur.
• L’alarme optionnelle avec cloche n’a pas
été remise en place après un blocage par
surintensité de courant.
• Le mécanisme optionnel de déclenchement par sous voltage n’a pas été
enclenché.
• Le verrouillage réciproque optionnel de
réseaun'était pas réenclenché après une
opération d'enclenchement.
Il faut que ces situations soient corrigées avant
de procéder à la fermeture du disjoncteur.
Opening the Breaker
Open the breaker contacts with any of the following
methods:
• Depress the OPEN button on the front of the breaker.
• Open or trip the breaker using the Entellisys™ HMI.
• Energize the (optional) Shunt Trip accessory by
applying the rated voltage to secondary disconnect
terminals 5 and 7.
Padlock Operation
The padlock provision prevents the breaker from closing
by holding the trip latch in the tripped position. Up to
three padlocks with 1/4" or 3/8" diameter shanks, or scissor-type safety lockout hasps may be inserted at one time.
To install a padlock, use the following procedure:
WARNING: Be sure to test for proper
operation of the mechanism, as described in
step 1, before using it to secure the breaker.
AVERTISSEMENT: Assurez-vous de tester que
le mécanisme opère correctement, tel que
décrit à l'étape 1, avant de l'utiliser pour fixer le
disjoncteur.
1. To check for proper installation of the padlock
mechanism, hold in the OPEN button, pull out the
padlock slide, insert a 1/8" rod or #10 gage solid
wire, and attempt to close the breaker.
The breaker must not close.
2. While holding the OPEN button in, slide the padlock plate out and hold it in place.
3. Put the padlock or safety lockout hasp into one of
the three holes in the padlock plate; this will
prevent the plate from returning to its unlocked
position and prevent the breaker from closing.
4.2 Control Wiring
Figure 2 is the wiring diagram for the breaker control
circuits. Table 4 lists the secondary disconnect terminals
and the items connected to each. The location of the
secondary disconnect is illustrated in Figure 3.
4.3 Breaker Interlocks
EntelliGuard breakers are equipped with a number of
safety interlocks to prevent improper operation of the
breaker.
Draw-Out Interlock
The draw-out interlock prevents the breaker from being
closed when the breaker is in neither the CONN or TEST
position, but is between these positions. A pin on the side
of the breaker engages a ramped cam in the switchgear
cubicle. When the pin is lifted 3/8" the breaker is held tripfree.
An additional interlock holds the breaker trip-free whenever the access door to the racking mechanism is open.
Contact Interlock
The contact interlock keeps the door to the draw-out
mechanism racking screw closed whenever the breaker
contacts are CLOSED. This prevents changes to the
breaker’s position with the main contacts CLOSED.
Spring Discharge Interlock
The spring discharge interlock functions in conjunction
with the circuit breaker’s draw-out interlock and a
compartment-mounted cam to discharge the closing and
opening springs before the breaker can be withdrawn
from the compartment.
4.4 Equipment Interlocks
Additional optional interlocks may be furnished with the
breaker enclosure. The Key Interlock prevents the breaker
from closing when the interlock is engaged and requires
one or more keys to operate. The Door Interlock prevents
opening of the enclosure door when the breaker is in the
CONN position. It can be defeated for authorized access.
The door can be opened by racking the breaker to the
TEST or DISC position.
8
EntelliGuard™ 800–2000 A Power Circuit Breakers
Chapter 4. Breaker Operation
Figure 2. Elementary diagram of the breaker control circuits.
Figure 3. Location of the secondary disconnect (top view of the breaker).
9
EntelliGuard™ 800–2000 A Power Circuit Breakers
Chapter 4. Breaker Operation
10 Aux Switch (NO contact)
1 Aux Switch
2 Aux Switch
11 Aux Switch (NC contact)
13 Flux Shifter
12 Flux Shifter common
5 Shunt Trip
7 Shunt Trip common
9 Close Circuit
18 Close Circuit common
8 Closing Spring Charging Motor
17 Closing Spring Charging Motor common
3 Remote Charge Indicator
4 Remote Charge Indicator
14 Bell Alarm Trip
6 Bell Alarm Trip Common
16 Bell Alarm Status
19 Bell Alarm Status Comon
OR
15 Network Interlock SET
20 Network Interlock RESET
21 Network Interlock SET/RESET common
16 Network Interlock Status
19 Network Interlock Status common
22 OFLO (phase A)
23 OFLO (phase A)
24 OFLO (phase B)
25 OFLO (phase B)
26 OFLO (phase C)
27 OFLO (phase C)
28 Spare
29 Spare
30 Spare
31 Spare
32 Spare
33 Spare
34 Spare
35 Spare
36 Spare
Table 4. Secondary disconnect terminals with standard and optional connections.
10
Loading...