ABB TMAX XT XT7M Instrucciones de instalación

—

INSTRUCTION HANDBOOK

1SDH002302A1001 - ECN000285442

TMAX XT XT7M

Disassembly instructions

Disassembly instructiontmaX Xt Xt7m

1. SCOPE

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

XT7M moulded case circuit breaker equipped with an electronic trip unit (type Ekip DIP LS/I).

Document is focused on Tmax XT XT7M 3p IEC version, anyway it allows to cover other versions of

Tmax XT XT7M 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 and make sure that the springs of the operating mechanism are discharged.

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 

Lever In the T.U. reset group 

Lever support In the T.U. reset group 

Support Mounted on the upper part of the circuit breaker 

Cables protection Mounted on the back part of the trip unit 

Rating plug case Mounted on the front of the trip unit 

Rating plug printed circuit board In the rating plug case 

Backplane Mounted on the back part of the trip unit 

Trip unit case On the trip unit 

Trip unit back cover On the trip unit 

Trip unit printed circuit board In the trip unit 

Motor PCS support Mounted on the left part of the circuit breaker 

Trip coil In the trip coil group 

Trip coil group Mounted on the left part of the circuit breaker 

MID Mounted on the right part of the circuit breaker 

Wires cover Mounted on the left part of the circuit breaker 

Wiring Mounted on the left part of the circuit breaker 

RTC lever Mounted on the right side of the operating mechanism 

Operating mechanism Mounted on the center of the circuit breaker 

Unlocking shaft appendices Mounted on the pin of the operating mechanism 

Springs charging lever Mounted on the left side of the operating mechanism 

Protections Mounted on the upper case assembly 

Fixed contacts protections Mounted on the fixed contacts 

Covers Below the sensors 

Sensors In the bottom part of the circuit breaker 

Insulation protections On the moving contacts assembly 

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 instructiontmaX Xt Xt7m

Tools

Allen key

Flat screwdriver

6.1 PHASE 1 – CAP KITS

By means of the cross screwdriver unscrew

the 2 screws fixing the terminal clamp to the

circuit breaker main structure.

By means of the flat screwdriver push the cap

kits in order to remove them from the circuit

breaker main structure.

By means of the allen key remove the screws

connected with the cap kits and after manually

remove the plates.

Manually remove the terminal clamp.

Actions to be performed

8mm

Cross screwdriver

INSTRUCTION HANDBOOK

 

 

 

(Metal)

 

 



containing brominated flame

retardants)

 

Disassembled parts

By means of the flat screwdriver remove the

nuts mounted on the cap kits.

Disassembly instructiontmaX Xt Xt7m

6.2 PHASE 2 – CIRCUIT BREAKER FRONT COVER AND OPERATING

MECHANISM COVER

Manually push the trip unit transparent

protection as indicated by the arrow and

remove it.

By means of the cross screwdriver unscrew the

2 screws located in the lower part of the circuit

breaker fixing the circuit breaker front cover to

the circuit breaker main structure.

Lift the springs charging lever and by means

of the cross screwdriver unscrew the screw

located below the springs charging lever fixing

the circuit breaker cover to the circuit breaker

main structure.

Manually lift the circuit breaker front cover to

complete the removal.

Actions to be performed

Tools

Torx key

No. 8

Cross screwdriver

Flat screwdriver

INSTRUCTION HANDBOOK

By means of the cross screwdriver unscrew the

screw fixing the T.U. reset group to the circuit

breaker front cover.

Manually lift the T.U. reset group and complete

the removal.

By means of the flat screwdriver unhook the

reset lever from the lever support of the T.U.

reset group.

Manually separate the lever support and the

lever.

Disassembly instructiontmaX Xt Xt7m

Manually remove the spring from the lever.

Manually remove the reset spring from the

lever support.

By means of the tork key remove the screw

fixing the operation counter cap to the circuit

breaker front cover and after manually remove

the operation counter cap.

By means of the tork key remove the 2 screws

fixing the front cap to the circuit breaker front

cover and after manually remove the front cap.

INSTRUCTION HANDBOOK

By means the cross screwdriver unscrew

the 2 screws located in the lower part of

the operating mechanism cover fixing the

operating mechanism cover to the main

structure of the circuit-breaker.

By means the cross screwdriver unscrew the

screw located on the right of the operating

mechanism cover fixing the operating

mechanism cover to the main structure of the

circuit breaker and manually complete the

removal of the operating mechanism cover.

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

 

 

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

containing brominated flame retardants)

 

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

(Thermoplastics containing brominated flame

retardants)

 

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

 

 

 

 

Disassembled parts

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