ABB TMAX XT XT2 THERMOMAGNETIC Montageanleitung

—

INSTRUCTION HANDBOOK

1SDH002293A1001 - ECN000285442

TMAX XT XT2 ELECTRONIC

Disassembly instructions

Disassembly instruction tmaX Xt Xt2 electronic

1. SCOPE

Scope of this document is to illustrate the step-by-step disassembly process of ABB SACE Tmax XT XT2

moulded case circuit breaker equipped with an electronic trip unit (type Ekip DIP).

Document is focused on Tmax XT XT2 3p IEC version, anyway it allows to cover other versions of Tmax

XT XT2 circuit breaker equipped with an electronic 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 

Cases for microswitches In the right hole of the circuit breaker 

Plug In the left hole of the circuit breaker 

Tripping shaft Mounted on the operating mechanism 

Trip lever In the left hole of the circuit breaker 

Open/close lever In the left hole of the circuit breaker 

Printed Circuit Board In the trip unit 

Sensors In the trip unit 

Trip coil 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 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 Xt2 electronic

Tools

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 and push it up in order to remove the

cap kits.

Actions to be performed

Disassembled parts

5mm

INSTRUCTION HANDBOOK

Tools

Cross screwdriver

6.2 PHASE 2 – BREAKING PART FRONTAL

By means of the cross screwdriver unscrew the

2 screws fixing the braking part frontal to the

circuit breaker main structure.

Manually lift a little bit the breaking part

frontal and complete the removal pulling the

breaking part frontal as indicated by the arrow.

By means of the flat screwdriver push up the

reset test rod and manually remove the reset

test rod.

By means of the cross screwdriver push the

trip test button.

Actions to be performed

Disassembled parts

 

 

 

Flat screwdriverFlat screwdriver

Disassembly instruction tmaX Xt Xt2 electronic

6.3 PHASE 3 – TOGGLE AND ITS PROTECTION

Manually lift the toggle and its protection and

after separate the toggle from its protection.

Actions to be performed

Disassembled parts

 

 

Tools

–

INSTRUCTION HANDBOOK

6.4 PHASE 4 – TRIP UNIT

By means of the cross screwdriver unscrew the

2 screws fixing the trip unit frontal to the trip

unit main structure.

By means of the cutter start removing the label

located on the trip unit frontal and manually

complete the operation.

Manually disassemble the transparent

protection from the trip unit frontal.

By means of the torx key unscrew the 3 screws

fixing the trip unit to the circuit breaker

breaking part.

Actions to be performed

Tools

Cross screwdriver

Cutter

Torx key

No. 15

Disassembly instruction tmaX Xt Xt2 electronic

Manually slightly pull the trip unit as indicated

by the arrow and after lift the trip unit in order

to complete the removal.

Disassembled parts

 

 

 

 

 

components, …) *

*Trip unit will be furtherly disassembled (see Phases 6.11 and 6.12)

INSTRUCTION HANDBOOK

6.5 PHASE 5 – PLASTIC PARTS MOUNTED ON THE BREAKING PART

Manually slightly push the 2 flaps present on

each case for microswitch located in the right

hole of the breaking part as indicated by the

arrows and after manually lift each case for

microswitch to complete the removal.

Manually lift the cable crossing cover located in

the upper part of the breaking part.

By means of the flat screwdriver lift the plug

located in the left hole of the breaking part and

after manually complete the removal of the

plug.

By means of the flat screwdriver lift the white

plastic lever located in the upper part of the

breaking part and after manually complete the

removal of the white plastic lever.

Actions to be performed

Flat screwdriver

Disassembled parts

 



brominated flame retardants)

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

(Thermoplastics containing brominated flame

retardants)

 

 

Tools

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