Lubrication Of Jaw-Type Isolating Contacts Of Withdrawable Circuit-Breaker - ABB SACE Emax 2 Series Operating Instructions Manual

5 - Lubrication of jaw-type isolating contacts of withdrawable circuit-breaker

Preliminary operations
Clean and lubricate the jaw-
type isolating contacts
283 | © 2023 ABB | 1SDH001330R1002 - ECN000297030
Lubrication operations must be performed as indicated in the maintenance schedule on page 267.
WARNING! before proceeding with any maintenance operation, it is mandatory to:
• Set the circuit-breaker to the open position and make sure that the springs of the
operating mechanism are discharged.
• Work with the circuit-breaker removed from the fixed part. For removal of the fixed
part see paragraph "Circuit breaker racking-in/racking-out operations" in the document
1SDH000999r0002
circuit breakers E2.2, E4.2 and E6.2.
• Disconnect the power circuit and auxiliary circuits and earth the terminals in a visible
way, on both the supply side and load side.
Perform maintenance periodically where grease is already present and if its properties have been impaired
due to the environment.
The safety shutters must be disassembled (only IEC) before cleaning and lubricating the jaw-type
isolating contacts. Information about disassembly is given in document
breakers E1.2 or the document
intervention of a technician ABB.
1. Clean the jaw-type isolating contacts in the indicated points. Use a laminate thinner such as
Chemma 18 or equivalent if there is a heavy coating of dirt (Figure 168 - IEC for E1.2; Figure 169 - IEC
for E2.2, E4.2 and E6.2).
Figure 168 - IEC
Figure 169 - IEC
5 - Lubrication of jaw-type isolating contacts of withdrawable circuit-breaker
for circuit breakers E1.2 or in the document
1SDH001000r0717 for circuit breakers E2.2, E4.2 and E6.2, or request the
ABB | SACE Emax 2
1SDH001000r0002
1SDH000999r0717 for circuit
Continued on the next page
Putting into service and maintenance
for