UPS/NTA GB/DELMP_EXPC1C3C6_B 37
4.6.7 Operating a module of the system
Module uncoupling can only be achieved if the system is
redundant, meaning that it can supply all the energy required
to the load with one module disconnected.
4.6.7.1 Uncoupling of a module
The uncoupling of a module is to be made from its control panel by selecting:
- the menu "UNIT COMMANDS"
- the submenu "UNIT UNCOUPLING" ("cancel" is being displayed)
- press key
to reach the module uncoupling option
- press key ENTER to confirm the request
- open switch Q2
4.6.7.2 Shutdown of a module
In the control panel of the appropriate module, select:
- the menu "SUBSET COMMAND"
- the submenu "INVERTER OFF" and confirm with the ENTER key
- the submenu "RECTIFIER OFF" and confirm with the ENTER key
- open Q1 (if provided) and Q20 (battery protection),
Note 1: operations are identical for all modules.
Note 2: in case of a redundant system, the command is inhibited if the module
uncoupling causes the loss of redundancy; the corresponding alarm is displayed
on the central bypass cabinet.
CAUTION
Do not forget that even when the load is stopped the module is
live:
- because of the input voltage upstream of Q1,
- because of the load voltage coming from the common busbar
downstream of Q2,
- because of the continuous voltage generated by the
capacitors. The safety level is only reached after 5 minutes.
4.6.8 Starting and coupling a module
The startup of the modules is run through an interactive procedure.
In the control panel of the module:
- select the menu "UNIT COMMANDS"
- select the submenu " UNIT AUTOMATIC STARTUP"
- confirm with the ENTER key
- comply with the instructions displayed i.e.:
- close Q1 (if provided) to supply the rectifier
- validate startup with the battery before closing Q20
- close Q2.
Note 1: operations are identical for all modules.
At this point, the module is connected to the common busbar.
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