As part of the preventive maintenance operations of DC5, we will perform the mechanical maintenance of the generators followed by an infrastructure redundancy test.

The operation consists of simulating an electrical supply cut-off to the main LV boards and validating load recovery as well as operation of generators after the mechanical maintenance of each group according to the following provisional schedule:

- GE LT1.1: 2021-11-15 (between 6:30 and 13:00 UTC)
- GE LT1.2: 2021-11-16 (between 6:30 and 13:00 UTC)
- GE LT2.1: 2021-11-17 (between 6:30 and 13:00 UTC)
- GE LT2.2: 2021-11-18 (between 6:30 and 13:00 UTC)
- GE BAT 1: 2021-11-19 (between 6:00 and 12:00 UTC)

Our teams as well as the usual maintenance companies will be involved for the best handling of operations. This intervention does not present any particular risk of service interruption and will be processed during working hours.

In the event of an electrical cut-off from the HV network during the operation, ongoing maintenance will be interrupted for automatic restart of the generator set. The load will be supplied by the batteries of the inverter of the electric chain during the fallback of the maintainer. Generators whose maintenance is not in progress will resume electrical charge automatically