ABB ACS580MV - Bypass Unit; Isolation Switches for Manual Bypass; Contactor for Auto Bypass

146 Preventive Maintenance
Bypass unit
 Isolation switches for Manual Bypass
Pay special attention to the following:
1. The isolation switches should be easy for operation.
2. Conductive grease like “OKS VP980” is applied on contact surface of isolation
switches, apply more if necessary.
3. No loose connection.
4. Check status lamps on front door by operating isolation switches.
5. Check interlock of isolation switches as the table below.
Note:
• “X” means the operation cannot be executed.
• “√” means the operation can be executed.
• Any of switches cannot be operated when the selector is in “Operation” or “OFF”
position.
 Contactor for Auto Bypass
Pay special attention to the following: