ABB MNS-Up, Service Manual

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M N S - U P
SER V I C E M A N UA 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