Lubrication Of Jaw-Type Isolating Contacts Of Withdrawable Circuit-Breaker - ABB Sace Emax 2 Installation, Operation And Maintenance Instructions For The Installer And The User

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

Preliminary operations
Clean and lubricate the jaw-
type isolating contacts
62 | © 2022 ABB | 1SDH000999R0002 - ECN000232533
Lubrication must be performed as indicated in the maintenance schedule on page 57.
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" on page 17 .
• 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 1SDH000999R0717, or request
the intervention of a technician ABB.
1. Clean the jaw-type isolating contacts in the indicated points. Use a laminate thinner such as Henkel
273471, Chemma 18 or equivalent if there is a heavy coating of dirt.
2. Lubricate the jaw-type isolating contacts with Mobilgrease 28 (EXXON MOBIL) in the indicated
points.
Figure 76 - IEC
Figure 77 - UL
Putting into service and maintenance | 5 - Lubrication of jaw-type isol a ting contacts of withdrawabl e circuit-breaker
ABB | SACE Emax 2