Adding Of Module Sets; Removing Of Module Sets - ABB MNS-Up Service Manual

54 M N S - U P S E R V I C E M A N U A L
9.2

Adding of module sets

MNS-Up modules are always installed as a complete set, since none of the modules can work independently.
To install a new module set the following steps are recommended:
If possible, switched OFF the complete system and disconnected the loads.
·
If no redundancy is present, the load must be disconnected
·
If redundancy N+1 is present, disconnecting the load is not mandatory
(see "hot swappable" definition) but is recommended
– Remove the active and passive module space covers
!
– Install the passive module first
– Install active module
kg
– Install filter module
Follow the start-up procedure as described in the DPA500 user manual section 5.15.2.2.
9.3

Removing of module sets

Turn down the MNS-Up module as described in the DPA500 manual 6.11.
• Disconnect and pull the filter module to isolate the MNS-Up module completely.
• Disconnect active module and pull to disconnected position.
• Disconnect passive module and pull to disconnected position.
Figure 9-02 Module stoppers for active and passive modules to prevent dropping