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Disassembly instruction tmaX Xt Xt3

1. SCOPE

Scope of this document is to illustrate the step-by-step disassembly process of ABB SACE Tmax XT XT3 
moulded case circuit breaker.
Document is focused on Tmax XT XT3 3p IEC version, anyway it allows to cover other versions of Tmax 
XT XT3 circuit breaker with just few slight differences to be taken into account.

Gloves

Glasses

Safety shoes                            Protective clothes

4. TOOLS

Disassembly operations require the use of tools (e.g. screwdriver, torx key, pliers, …); tools to be used 
are specified inside each phase of the disassembly process (see Chapter 6).

3. PERSONAL PROTECTIVE EQUIMENT (PPE)

When performing disassembly, following safety Personal Protective Equipment (PPE) must be worn:

2. SAFETY NOTES

Before proceeding with any disassembly operation, it’s mandatory to put the circuit breaker in open 
position.
Disassembly operations of circuit breakers must be performed by qualified and skilled personnel in 
the electrical field (IEV 195-04-01: person with relevant education and experience to enable him or her 
to perceive risks and to avoid hazards which electricity can create) and having a detailed knowledge of 
circuit breakers.
Disassembly activites must be performed in an ergonomic workspace able to ensure protection of per-
sons demanded to perform disassembly activities.
Applicable national legislation and international standards in force at the time of disassembly of circuit 
breakers must be taken into account in addition to prescriptions illustrated in this document.
ABB declines any responsibility for injury to people or damage to property resulting from a failure to 
comply with the instructions set out in this document and with any applicable safety standard.

Summary of Contents for Tmax XT XT3

Page 1: ... INSTRUCTION HANDBOOK 1SDH002294A1001 ECN000285442 Tmax XT XT3 Disassembly instructions ...

Page 2: ......

Page 3: ...ny disassembly operation it s mandatory to put the circuit breaker in open position Disassembly operations of circuit breakers must be performed by qualified and skilled personnel in the electrical field IEV 195 04 01 person with relevant education and experience to enable him or her to perceive risks and to avoid hazards which electricity can create and having a detailed knowledge of circuit brea...

Page 4: ...s 1 Rear cover Mounted on the back side of the circuit breaker case 1 6 DISASSEMBLY PROCESS Circuit breakers disassembly process is constituted by a sequence of operations to be performed on products after their dismounting from original installation For each phase following information is provided Part parts to be disassembled title of the phase Tools to be used Description of actions to be perfo...

Page 5: ...tic and Metal SEPARATE TREATMENT Thermoplastics containing brominated flame retardants 6 1 PHASE 1 CAP KITS 1 By means of the allen key remove the screws connected with the cap kits 2 Insert the flat screwdriver as shown in the picture 2 and push it up in order to remove the cap kits Actions to be performed Disassembled parts ...

Page 6: ...FRONTAL 3 By means of the cross screwdriver unscrew the 2 screws fixing the frontal to the circuit breaker main structure 4 Manually remove the frontal together with the 2 fixing screws Actions to be performed Disassembled parts 1 frontal Plastic 2 screws Metal ...

Page 7: ...s to be performed 5 As preliminary action close the circuit breaker and push the trip test button 7 By means of the pliers take the upper part of the toggle and remove it 6 Slightly push the toggle towards the bottom part of the circuit breaker Disassembled parts 1 toggle Plastic ...

Page 8: ...r remove the 2 pins 10 By means of the torx key unscrew the 4 screws fixing the operating mechanism to the circuit breaker main structure 11 Manually remove the operating mechanism together with the tripping shaft 9 By means of the cross screwdriver unscrew the 2 screws fixing the trip unit cover to the circuit breaker main structure and remove the trip unit cover Actions to be performed Tools Cro...

Page 9: ...sembled parts 2 pins Metal 2 4 screws Metal 1 trip unit cover with trimmer Plastic SEPARATE TREATMENT Thermoplastics containing brominated flame retardants 1 operating mechanism Plastic and Metal SEPARATE TREATMENT Thermoplastics containing brominated flame retardants 1 tripping shaft Plastic SEPARATE TREATMENT Thermoplastics containing brominated flame retardants 1 trip test button Plastic 1 spri...

Page 10: ...ted in the upper part of the circuit breaker fixing the circuit breaker cover to the circuit breaker base 16 Manually lift the circuit breaker cover 15 By means of the cutter start removing the label located on the left side of the circuit breaker and manually complete the operation Disassembled parts 4 screws Metal 1 label Adhesive paper 1 circuit breaker cover Plastic Disassembled parts ...

Page 11: ...ans of the flat screwdriver push up and remove from the main circuit breaker structure the arching chambers 18 By gravity let the metal plates mounted inside the plastic case come out from the plastic case 6 arching chambers cases Plastic 33 arching chambers plates Metal Disassembled parts Flat screwdriver ...

Page 12: ...tions to be performed 19 By means of the flat screwdriver push up the bottom connection terminals 20 Manually lift the bottom connection terminals and after remove the main contacts assembly Disassembled parts 1 main contacts assembly Plastic and Metal Flat screwdriver ...

Page 13: ...t breaker base and manually remove the rear cover 22 By means of the cross screwdriver unscrew the 3 screws fixing the upper connection terminals 23 Manually remove the upper connection terminals Disassembled parts 2 3 screws Metal 1 rear cover Plastic SEPARATE TREATMENT Thermoplastics containing brominated flame retardants 3 connection terminals Metal 1 circuit breaker base Plastic Cross screwdri...

Page 14: ...TRUCTION HANDBOOK 7 ENERGY CONSUMPTION FOR CIRCUIT BREAKERS DISASSEMBLY Since all disassembly operations illustrated in this document are manual the CO2 equivalent emissions can be considered null negligible ...

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Page 16: ... Copyright 2022 ABB All rights reserved Specifications subject to change without notice ABB SACE A division of ABB S p A L V Breakers Via Pescaria 5 24123 Bergamo Italy Phone 39 035 395 111 Fax 39 035 395 306 433 abb it lowvoltage ...

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