ABB TMAX XT XT6 ELECTRONIC Montageanleitung

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INSTRUCTION HANDBOOK

1SDH002299A1001 - ECN000285442

TMAX XT XT6 THERMOMAGNETIC

Disassembly instructions

Disassembly instruction tmaX Xt Xt6 tHermomaGnetic

1. SCOPE

Scope of this document is to illustrate the step-by-step disassembly process of ABB SACE Tmax XT XT6

moulded case circuit breaker equipped with a thermomagnetic trip unit.

Document is focused on Tmax XT XT6 3p IEC version, anyway it allows to cover other versions of Tmax

XT XT6 circuit breaker equipped with a thermomagnetic trip unit 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.

INSTRUCTION HANDBOOK

If disassembled parts require a separate treatment a specific indication is provided inside each phase

with reason why for the separate treatment (see Chapter 6).

Description Position inside circuit breaker Quantity

Cap kits In correspondence of circuit breaker connection terminals 

Plugs In correspondence of circuit breaker upper connection terminals 

AUE lever group Mounted at the left of the toggle 

Right base accessory Mounted in the bottom right part of the circuit breaker cover 

Trip test rod Mounted on the right base accessory 

Left base group Mounted in the bottom left part of the circuit breaker cover 

Toggle extention Mounted on the toggle 

Toggle protection Mounted on the toggle 

Toggle holder Mounted on the toggle base 

Dowels Mounted in the bottom part of the circuit breaking part 

Mobile contacts assembly Mounted in the middle of the breaking part 

Trimmers Mounted on the trip unit 

Hook Mounted in the trip unit 

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 are

provided:

 

 

 

 

 

applicable)

 

5. SEPARATE TREATMENT

Table below lists parts requiring a separate treatment adding information about part location inside

circuit breakers and related quantity.

Disassembly instruction tmaX Xt Xt6 tHermomaGnetic

Tools

Allen key

Flat screwdriver

6.1 PHASE 1 – CAP KITS

By means of the allen key remove the screws

connected with the cap kits.

Manually separate the cap kits originally

mounted in corresponce of the upper terminals

from their plugs.

Insert the flat screwdriver as shown in the

picture and unhook the cap kits from the

circuit breaker.

Insert the flat screwdriver as shown in the

picture and unhook the cap kits and their plugs

from the circuit breaker.

Actions to be performed

5mm

Disassembled parts

 

 

(Thermoplastics containing brominated flame

retardants)

 

(Thermoplastics containing brominated flame

retardants)

INSTRUCTION HANDBOOK

Tools

Cross screwdriver

6.2 PHASE 2 – FRONTAL

By means of the flat screwdriver push the test

button in order to bring the circuit breaker in

trip position.

Manually remove the aesthetic front cover.

By means of the cross screwdriver unscrew the

6 screws fixing the upper and the lower front

covers to the circuit breaker main structure.

Insert the flat screwdriver as shown in the

picture and slightly push the screwdriver as

shown by the arrow in order to raise up and to

unhook the aesthetic front cover from circuit

breaker main structure; operation must be

performed even on the other side of the circuit

breaker.

Actions to be performed

Flat screwdriverFlat screwdriver

Disassembly instruction tmaX Xt Xt6 tHermomaGnetic

Manually remove the upper and the lower front

covers.

 

 

 

 

Disassembled parts

INSTRUCTION HANDBOOK

6.3 PHASE 3 – TRIP UNIT

By means of the allen key unscrew the 6 screws

fixing the trip unit to the breaking part.

Manually remove the trip unit from the

breaking part.

By means of the cross screwdriver unscrew



the circuit breaker fixing the trip unit to the

breaking part.

Actions to be performed

Tools

Disassembled parts

 

 

Allen key

4mm

Cross screwdriver



Disassembly instruction tmaX Xt Xt6 tHermomaGnetic

6.4 PHASE 4 – BREAKING PART COVER

By means of the cross screwdriver unscrew the



levers to the breaking part.

By means of the cross screwdriver unscrew



breaking part.







the same time push the toggle in the direction

indicated by the arrow; after manually remove



Actions to be performed

Tools

Cross screwdriver

Torx key

No. 25

Pliers

Flat screwdriver

Cutter

INSTRUCTION HANDBOOK

Manually remove the breaking part cover.

By means of the cross screwdriver unscrew the

4 screws fixing the right base accessory to the

breaking part.

By means of the pliers remove the spring



By means of the torx key unscrew the 9 screws

fixing the breaking part cover to the breaking

part main structure.

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