ABB Tmax XT XT3 Instrucciones de instalación

—

INSTRUCTION HANDBOOK

1SDH002294A1001 - ECN000285442

Tmax XT XT3

Disassembly instructions

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.

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 

Trip unit cover Mounted in the lower part of the circuit breaker 

Trimmer Mounted on the circuit breaker cover 

Sides of the operating mechanism Parts constituting the operating mechanism 

Tripping shaft Between the operating mechanism and the tripping groups 

Rear cover Mounted on the back side of the circuit breaker case 

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:

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

 

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

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

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

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 Xt3

Tools

6mm

Allen key

Flat screwdriver

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

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

(Thermoplastics containing brominated flame retardants)

6.1 PHASE 1 – CAP KITS

By means of the allen key remove the screws

connected with the cap kits.

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

INSTRUCTION HANDBOOK

Tools

Cross screwdriver

6.2 PHASE 2 – FRONTAL

By means of the cross screwdriver unscrew

the 2 screws fixing the frontal to the circuit

breaker main structure.

Manually remove the frontal together with the

2 fixing screws.

Actions to be performed

Disassembled parts

 

 

Disassembly instruction tmaX Xt Xt3

Tools

Pliers

6.3 PHASE 3 – TOGGLE

Actions to be performed

As preliminary action close the circuit breaker and

push the trip test button.

By means of the pliers take the upper part of the

toggle and remove it.

Slightly push the toggle towards the bottom part

of the circuit breaker.

Disassembled parts

 

INSTRUCTION HANDBOOK

Disassembled part

6.4 PHASE 4 – OPERATING MECHANISM, TRIPPING SHAFT AND TRIP

UNIT COVER

As preliminary action by means of the flat

screwdriver push up the 2 pins located in

correspondence of the operating mechanism

and after remove the 2 pins.

By means of the torx key unscrew the 4 screws

fixing the operating mechanism to the circuit

breaker main structure.

Manually remove the operating mechanism

together with the tripping shaft.

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

Cross screwdriver

Flat screwdriver

Torx key

No. 10

Disassembly instruction tmaX Xt Xt3

Manually remove the tripping shaft from the

operating mechanism.

Manually remove the trip test button located on

the trip unit cover and the spring behind it.

Disassembled parts

 

 

 



flame retardants)

 



flame retardants)

 

(Thermoplastics containing brominated flame

retardants)

 

 

INSTRUCTION HANDBOOK

6.5 PHASE 5 – REMOVAL OF THE CIRCUIT BREAKER COVER

Tools Actions to be performed

Cross screwdriver

Cutter

By means of the cross screwdriver unscrew the

4 screws located in the upper part of the circuit

breaker fixing the circuit breaker cover to the

circuit breaker base.

Manually lift the circuit breaker cover.

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

 

 

 

Disassembled parts

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