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ELECTRICITY – SWITCHBOARDS LAYOUT AND DESCRIPTION + CONTROL ROOM

AND DCS LAYOUT SPECIFICATION

- Dimensions of the main distribution switchboard, especially for the K3 boiler, are - 19x6.8x approx. 3m. The bidder will provide a HVAC and cooling of this substation as the scope of supply. This HVAC and air conditioning will be dimensioned with respect to the new technology installed, the design of air conditioning will take into account the existing devices, which the CA is not currently able to define it.

- There is no HVAC or air conditioning installed in the specified switchboard area.

- Regarding the heat gains, the existing 6 kV outlets from the R3.2 switchboard, the L1 choke (will be shut down early with the TG1 turbine and modified) will be maintained as well as one 0.4 kV outlet from the R3.3 switchboard for the Water treatment technology.

- New substation equipment, including transformer stands, will be approximately in the existing locations

R3.2 – 6,3 kV

R3.2–6.3 kV switchboard layout

Viewpoint to the R3.2–6.3 kV switchboard

Boilers K1 and K2

switchboards

Boiler house K3

Switchboard

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Viewpoint to the R3.2–6.3 kV switchboard

Detail of the R3.2–6.3 kV switchboard

Detail of the R3.2–6.3 kV switchboard

Example of the actual panel concept

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Subsidiary switchboards – 0,4 kV + lighting

- Regarding the heat losses of the installed technology that will be saved on this area is minor. The

design and dimension of the HVAC will respect the installation of the new technology. The areas are situated in the parts without direct connection to the outside area, so the conducts will be quite complicated. In case of the frequency converters installation it is necessary to install the HVAC as well to guaranty the optimal conditions for its operation.

- There is another possible layout for the frequency converters installation on the level of + 7,5m (old control room). The internal space is higher and more suitable for the installation and for the operation as well.

Subsidiary switchboards – 0.4 kV switchboard layout

Viewpoint to the 0.4 kV subsidiary switchboards

Switchboard for

lighting of K3

Actual subsidiary switchboards for K3 boiler – 0,4kV

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Viewpoint to the 0.4 kV subsidiary switchboards

Viewpoint to the 0.4 kV subsidiary switchboards

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Layout specification:

Switchboard R3.2–6.3

kV +0m

DCS location

+3,5m

Control room

+7,5m

Subsidiary switchboards

0.4 kV

+3,5m Subs. Switchb. 0.4 kV

Alternative layout

+7,5m