ABB SACE Emax 2 User Manual (English)

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ABB | SACE Emax 2

Putting into service and maintenance | 4 - Maintenance operations

4 - Maintenance operations

The maintenance operations must be carried out in accordance with the maintenance plan indicated to page

99.

Preliminary operations

The following are the operations to be carried out:

1. Open the circuit-breaker and make sure that the springs of the operating mechanism are unloaded.

2. In the case of a withdrawable circuit-breaker, extract the circuit-breaker from the ﬁxed part (see the

indication DISCONNECT)

WARNING! if work must be performed on ﬁxed circuit-breakers or on ﬁxed parts, discon

nect the power supply to the power circuit and auxiliary circuits and visibly earth the

terminals on both the supply side and load side.

Inspections and general

cleaning

Perform the following checks:

1. Check the cleanliness of the circuit-breaker, removing any dust or oily traces or excess grease using

a clean, dry rag (possibly using mild detergent. Use a cleaning product such as Henkel 273471 or

Chemma 18 or equivalent if there is a heavy coating of dirt).

2. Check that the rating plates with the technical speciﬁcations of the apparatus are present.

3. Clean the rating plates with clean, dry rags.

4. Make sure that there are no foreign bodies in the circuit-breaker compartment.

Circuit-breaker connections and

connections between circuit-

breaker and switchboard

Perform the following checks on the connections:

1. With dry paint-brushes and rags remove dust or soil, if present (use a non- aggressive detergent if

necessary. Use a cleaning product such as Henkel 273471 or Chemma 18 or equivalent if there is a

heavy coating of dirt).

2. Make sure there there are no traces of overheating on the terminals. Overheating is detected by a

different coloration of the parts in contact; the contact parts are usually silvery white in colour.

3. Check the tightness of fastening bolts for all connections to the terminals

WARNING! if work must be performed on ﬁxed circuit-breakers or on ﬁxed parts, discon

nect the power supply to the power circuit and auxiliary circuits and visibly earth the

terminals on both the supply side and load side.

ABB SACE Emax 2 Installation, Operation And Maintenance Instructions