GE EntelliGuard G

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DEH-41304C EntelliGuard® G Circuit Breaker

13 March 14 Section 8 – Maintenance, Testing and Troubleshooting

NOTES:

Courtesy of store.ips.us

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Table of Contents4
Section 1 - General Information7
Storage7
Introduction7
Quality Assurance7
Options Check Sheet7
Product Serial Number7
Measurement Units7
Product Description7
Hand Tools Needed for Installation7
Section 2 - Product Specifications9
Section 3 - Lifting, Mounting and Installation12
Circuit Breaker Unpacking12
Basic Circuit Breaker Construction12
Lifting and Mounting13
Using a Lifting Truck13
Drawout Cassette Lifting, Mounting and Installation13
Circuit Breaker Installation in to the Cassette13
Drawout Circuit Breaker Installation into the Cassette13
March14
Circuit Breaker Removal from the Cassette15
Fixed-Mounted Circuit Breaker Mounting16
Trip Unit16
General Information16
Trip Unit Installation16
Wiring17
Secondary Disconnect Blocks19
Selectivity/Backup Protection19
Section 4 - Operation20
Stored Energy Mechanism Key Features20
Circuit Breaker Charging20
Two Step Mechanism Design20
Closing Spring Discharge Procedure21
Closing Procedure21
Conditions When Closing Cannot Occur21
Circuit Breaker Opening Procedure21
Section 5 - Locks and Interlocks22
General Information22
Circuit Breaker Front Panel Locking22
Pushbutton Locking22
Key Lock for Breaker Trip Free Condition23
Drawout Cassette Front Panel Locking23
Security Locking23
Isolation Shutters Locking (if Installed)23
Door Interlock Installation24
Key Locks and Installation25
Two-Breaker Cable Interlock Installation25
Vertical Mounting25
Horizontal Mounting26
Safety Shutters Installation26
Section 6 - Accessories Description27
General Information27
Individual Accessories27
Motorized Spring Charging Unit27
Circuit Breaker Closing Coils - Standard and Commanded28
Command Operation Module28
Shunt Trip (ST)28
Status Indication Switch (Coil Signaling Contact)28
Under Voltage Release (UVR) with Fixed Time Delay28
Time Delay Module (TDM) for UVR (Externally Mounted)29
Remote Operation Coil Combination29
Auxiliary Switches29
Circuit Breaker - Key Interlock Facility30
Carriage Position Switch (TOC)30
Mechanical Interlocks (Cable/Rod)30
Cables30
Bell Alarm with Lockout31
Bell Alarm Switches31
Charging Spring Status Indicator32
Secondary Disconnects (Factory-Installed/Field Installable)32
Ground Fault32
Ready to Close Contact33
Sealed Door Panel Escutcheon33
Mechanical Operations Counter33
Cassette Substructure33
Position Indicators33
Rejection Device33
Front Flat Terminations33
Section 7 - Accessories Installation34
Circuit Breaker Front Cover Removal34
Motor Operator - Spring Charging Unit Installation34
Shunt Trip, Closing Coil and under Voltage Release Device Installation35
Closing Coil Installation35
Closing Coil Removal35
Network Interlock Installation35
Trip Alarm/Bell Alarm Switch Installation35
Ready to Close Switch Installation35
Shutter Prop Open Feature35
Carriage Position Switch Installation36
Busbar/Cable Grounding (Optional)36
Clusters36
Upper Cluster Contact Set Grounding37
Lower Cluster Contact Set Grounding37
Mechanical Trip Alarm Installation37
Mechanical Operations Counter Installation (Optional)38
Rejection Feature38
Section 8 - Maintenance, Testing and Troubleshooting39
Maintenance39
Inspection Schedule39
Cleaning Procedure39
Contact Wear Indicator Inspection (Optional)39
Circuit Breaker Main Mechanism Inspection40
Cassette Inspection40
Isolating Contacts (Drawout Type) Inspection40
Power Terminals and Busbar Inspection40
Lubrication40
Trip Unit Testing40
Troubleshooting41
Publications42

GE EntelliGuard G - Page 43

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