RN 17,5 kV 400 A - outdoor load break switch
Application:
Three-pole switch disconnector is designed for:
- conducting continuous and short-circuit currents,
- making switching operations in the current range which does not exceed the rated breaking current and rated making currents in outdoor medium voltage energy networks.
In the open state a disconnector creates a visible and safety isolation clearance.
Construction:
The switch disconnector is an electrical apparatus consisting of three monopolar segments installed on common beams. It is possible to open and close apparatus simultaneously for the three phases by the lever. Elements for extinguishing the arc are elastic arcing contacts mounted on the poles of the switch disconnector. The busbars and movable contacts disconnectors are coated with silver, the steel parts are hot galvanized.
Advantages:
- small size and weight
- large rated current
- compact construction
- high mechanical durability
- reliability
Technical data:
|
PARAMETER |
VALUE |
|
rated voltage/ rated current |
17,5 kV |
|
rated continuous current |
400 A |
|
rated short time withstand current of the switch disconnector and of the earthing switch |
16 kA |
|
rated time of the short circuit |
1 s. |
|
rated breaking current with circuit with low inductance at a voltage of 17.5 kV / number of switching cycles |
16 A/100 |
|
breaking current in the ring network |
16 A |
|
rated short-circuit current of the switch disconnector |
5 kV |
|
mechanical durability |
M2 |
|
mechanical durability:
|
|
|
allowed icing |
10 mm |
|
operating temperature |
-40°C up to +40°C |
|
the angle of rotation of the main shaft |
up to 192° |
|
mass of the switch disconnector |
39 kg |
TECHNICAL DRAWINGS:
All technical data presented in the catalog can be changed due to technological progress.