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ABB | SACE Emax 2

Putting into service and maintenance | 4 - First level maintenance

4 - First level maintenance

First level maintenance should be carried out in accordance with the maintenance schedule

shown on page 252.

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, disconnect 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 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 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, disconnect 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 Series Installation, Operation And Maintenance Instructions

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