DRAWA
These indoor switchgear units are designed to receive and distribute three-phase alternating current at a rated voltage of up to 24 kV and a frequency of 50 Hz in industrial and commercial power distribution networks. They are mainly used in containerised transformer substations and on-site medium-voltage switchgear. Thanks to their very compact dimensions, DRAWA switchgear can be installed in both new and modernised power facilities where there is limited space for installing a large number of panels or for expanding the switchgear.
DRAWA switchgear is available in the following types:
1. compartmentalised
2. with a single busbar
system 3. in a metal
enclosure 4. with air
insulation 5. with metal partitions
6. equipped with gas-insulated
switchgear 8. arc-suppressing
The modern design solutions and simple construction of DRAWA switchgear ensure easy operation and maintenance, as well as safe operation. A large number of bays for various purposes and with different main circuit configurations allows for the design and configuration of a wide variety of DRAWA switchgear systems in accordance with customer requirements.
DRAWA switchgear is assembled from switchgear bays, equipped with apparatus depending on the function the bay performs within the switchgear system. Modern and reliable switching equipment is used in them.
The structure of the individual panels is made of steel sheets coated with zinc or aluminium-zinc, which guarantees high corrosion resistance. Doors, covers and external panels are powder-coated,
DRAWA switchgear panels feature a structure that is suitably reinforced to ensure high resistance to the effects of an internal electric arc.
The panel structure is fitted with metal covers that open under the pressure of gases generated during the burning of an internal electric arc
Basic technical parameters of DRAWA switchgear:
Rated voltage12 kV / 17.5 kV / 24 kV Impulse test voltage75 kV / 95 kV / 125 kV1-minute test voltage at 50 Hz
28 / 42* kV / 38 kV / 50 kV
Rated frequency
50 Hz
Number of phases3Rated continuous current630, 1250 ARated peak current 50 kA1-second rated current 20 kAArc resistance 20 kA / 1 sec.Busbar systemsingleDimensions Height
1700 (+200**) mm
Width
375, 500, 600, 750
mm Depth
1000 (+220***, +80****) mm
Protection rating up to IP-54
*) Requirements according to: ΓOCT 14693:1990
**) Low-voltage compartment***
) Circuit breaker
drive****) Disconnector drive