ABB SACE Emax 2 E1.2 manual 

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INSTRUCTION HANDBOOK
1SDH002303A1001 - ECN000285442
EMAX 2 E1.2
Disassembly instructions

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Disassembly instruction emaX 2 e1.2
1. SCOPE
Scope of this document is to illustrate the step-by-step disassembly process of ABB SACE Emax 2 E1.2
air case circuit breaker equipped with an electronic trip unit (type Ekip TOUCH LSIG).
Document is focused on Emax 2 E1.2 3p IEC version, anyway it allows to cover other versions of Emax 2
E1.2 circuit breaker equipped with a 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 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.

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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
Lever In the T.U. reset group 
Lever support In the T.U. reset group 
Right side wall Mounted on the sliding contacts block 
Flat cables assemblies Mounted on the sliding contacts block 
Connector cables assembly Mounted on the sliding contacts block 
Sliding contacts base Mounted on the sliding contacts block 
Slide Mounted on the right shoulder 
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 
Ekip measuring blind printed circuit board On the trip unit 
Battery cover On the trip unit 
Battery On the trip unit 
Display printed circuit board On the trip unit 
Display On the trip unit 
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 
Measuring module connector On the trip unit 
Protections Mounted on the back part of the circuit breaker 
Motor PCS support Mounted on the left part of the circuit breaker 
Microswitch support Mounted on the left part of the circuit breaker 
 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 
Connector On the MID 
Auxiliary contacts On the MID 
Microswitch I/O On the MID 
Microswitch I/O support On the MID 
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 
Open lever On the right side of the circuit breaker 
RTC lever Mounted on the right side of the operating mechanism 
Conduit Behind the trip unit 
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 
Plastic parts 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 
5. SEPARATE TREATMENT
Table below lists parts requiring a separate treatment adding information about part location inside
circuit breakers and related quantity.

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Disassembly instruction emaX 2 e1.2
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)
 