ABB Tmax T8 L3692, Инструкция по установке и обслуживанию

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L3692
Tmax T8
13/39
Doc N°
Mod.
Apparatus
Scale
Page N°
1SDH000682R0002
L3885
L5757
8.3.2. General inspections and cleaning:
- Check to make sure that the device is clean. Remove any dust and traces of oil or grease with a clean, dry cloth (use a mild
detergent if necessary - A cleaning product such as Henkel’s 273471 or equivalent can be used if there is a heavy coating of dirt).
- Make sure that the rating plates with the technical specifi cations of the apparatus are affi xed.
- The rating plates must be cleaned with a clean, dry cloth.
- Remove all traces of dust, mould, condensation and tarnish
- Make sure that there are no foreign bodies in the circuit-breaker compartment.
8.3.3. Circuit-breaker connections and connections between circuit-breaker and switchboard
- Remove any dust and dirt with a brush and dry cloth - use a mild detergent if necessary. Use a cleaning product such as Hen-
kel’s 273471 or equivalent if there is a heavy coating of dirt.
- Make sure that there are no traces of localized overheating on the terminals. This problem is denoted by the change in the colour
of the parts in contact. These parts are usually silvery in colour.
- Make sure that the bolts of the terminal connections are well tightened (M12 - 70 Nm).
WARNING: if work must be performed on the circuit-breakers, disconnect the power circuit and auxiliary circuits
and earth the terminals in a visible way on both the supply side and load side.
- Make sure that the cable connecting screws are well tightened in the terminal boxes (0.7 Nm).
Fig. 18
8.3.4. Flange and escutcheon plate disassembly operations
– Make sure that the circuit-breaker has been set to safe conditions as described in sect. 8.1
– Remove the fl ange (1) of the release as shown in fi gure 19.
– Remove the front escutcheon plate (2) by removing the four screws (3).
–
Remove both the side guards (4) by removing the front screws (5).
Fig. 19
4
2
1
4
3
5
T8 III
T8 IV
1
3
2
5
8.3. First Level maintenance operations
8.3.1. Preliminary operations:
- open the circuit-breaker and make sure that the springs of the operating mechanism are unloaded.
WARNING: if work must be performed on the circuit-breakers, disconnect the power circuit and auxiliary circuits
and earth the terminals in a visible way on both the supply side and load side.