Schneider Electric and 6.0A, 3.0A, 2.0A, 5.0A Trip Unit Replacement, Required Tools, Preparation

Page 30

Micrologic™ 2.0A, 3.0A, 5.0A, and 6.0A Electronic Trip Units

48049-136-05

Section 4—Trip Unit Replacement

Rev. 01, 07/2012

 

 

Section 4—Trip Unit Replacement

ENGLISH

Trip unit replacement must be done by qualified persons, as defined by the National Electric Code, who are familiar with the installation and maintenance of power circuit breakers.

Before replacing trip unit, confirm that the circuit breaker is in good working condition. If the condition of the circuit breaker is unknown, do not proceed. For assistance in evaluating the condition of the circuit breaker, call Technical Support.

Read this entire section before starting the replacement procedure.

NOTE: If trip unit being replaced is a Micrologic 2.0, 3.0 or 5.0 trip unit, order connector block S33101 and circuit breaker or cradle wiring harness if necessary.

Required Tools

DANGER

HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH

Failure to follow these instructions for installation, trip test and primary injection testing may result in the failure of some or all protective function.

Apply appropriate personal protective equipment (PPE) and follow safe electrical work practices. See NFPA 70E or CSA Z462.

Replacement/upgrading of a trip unit in the field must be done by qualified persons, as defined by the National Electric Code, who are familiar with the installation and maintenance of power circuit breakers.

Before replacing/upgrading trip unit, confirm that the circuit breaker is in good working condition. If the condition of the circuit breaker is unknown, do not proceed. For assistance in evaluating the condition of the circuit breaker, call Technical Support.

If the circuit breaker fails to function properly in any manner upon completion of the trip unit installation, immediately remove the circuit breaker from service and call Field Services.

Turn off all power supplying this equipment before working on or inside equipment. Follow instructions shipped with circuit breaker to disconnect and reconnect circuit breaker.

Replace all devices, doors and covers before returning equipment to service.

Failure to follow this instruction will result in death or serious injury.

Torque-controlled screwdriver, set at 7 in-lbs (0.8 N•m) ± 10% (Lindstrom torque driver MAL500-2 or equivalent)

Micrologic Full-Function Test Kit (part number S33595)

Preparation

Record Switch Settings

Record all trip unit switch settings for later use.

Circuit Breaker Disconnection

Disconnect circuit breaker as directed in the circuit breaker instruction

 

bulletin shipped with the circuit breaker. The circuit breaker must be

 

completely isolated. (For a drawout circuit breaker, place circuit breaker in

 

the disconnected position. For a fixed-mounted circuit breaker, all voltage

 

sources, including auxiliary power, must be disconnected.)

Circuit Breaker Accessory Cover

Remove circuit breaker accessory cover as directed in the Install

Removal

Accessories section of the circuit breaker instruction bulletin shipped with

 

the circuit breaker.

28-EN

© 1999–2012 Schneider Electric All Rights Reserved

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Contents Conserver pour usage ultérieur Page Micrologic 2.0A, 3.0A, 5.0A, and 6.0A Electronic Trip Units Retain for future useFCC Notice Hazard Categories and Special SymbolsPlease Note Death or serious injuryTable of Contents Rating Plug Removal New Rating Plug Installation List of RegistersIntroduction Trip Unit SettingsGeneral Information CommunicationsMicrologic 2.0A Trip Unit Micrologic 3.0A Trip Unit0A Trip Unit Micrologic 5.0A Trip Unit Micrologic 6.0A Trip Unit Trips and clears the fault. Circuit breaker 2 does not trip Zone-Selective InterlockingTrip Unit Switches Micrologic Trip Unit Long-Time Delay ValuesLong-Time Protection Micrologic Trip Unit Short-Time Delay Values Short-Time ProtectionInstantaneous Protection Overload Indicator Light Indicator LightsGround-Fault Protection Micrologic Trip Unit Ground-Fault Pickup ValuesTrip Indicator Lights Trip Unit TestingMicrologic Trip Unit Configuration Control PowerExternal Power Supply Function Specification15-EN Display Accessing InformationAmmeter Ammeter MeasurementsRev , 07/2012 Ammeter Current MenuCurrent Menus 17-ENPeak Menu 18-ENSwitch Settings Menu Switch settings menu displays19-EN Examples Switch Setting AdjustmentOperation Set pickup levelsRev , 07/2012 Operation Set time delaySet Time Delay 21-ENSet Time Delays Set time delays22-EN Units Zone-Selective Interlocking ZSIZSI Combinations 23-ENInterlocking Wire circuit breakers for zone-selectiveCommunication Module values 24-ENSet communication module values 25-ENTrip Unit Operation Verification Trip Unit Settings CheckTrip Unit Settings ScreenTrip Unit Status Check Equipment Ground-Fault Trip Functions TestingTrip Unit Resetting 27-ENTrip Unit Replacement Required ToolsPreparation Rating Plug Removal Trip Unit ReplacementBattery Installation Trip Unit RemovalTrip Unit Installation 30-ENClose switch cover a Circuit Breaker Accessory CoverReplacement 31-ENTrip Unit Installation Check Trip Unit Setup Circuit Breaker Reconnection32-EN Adjustable Rating Plug Replacement New Rating Plug InstallationRating Plug Removal Battery Replacement Battery ReplacementCircuit Breaker Accessory Cover Removal Circuit Breaker DisconnectionWithstand Module Replacement Rev , 07/2012 Battery Replacement35-EN Register List Appendix A-Register ListList of Registers Module Module Name Equation Address RangeRev , 07/2012 Appendix A-Register List 37-ENSchneider Electric