Load breakers VN-RA
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- Other transport services
LOAD SWITCHES VN-RA
Load switches VN-RA are designed for switching on, long-term passing, disconnecting three-phase currents of 400 or 630 A with a frequency of 50 Hz in electrical networks with an isolated neutral and an operating voltage of up to 12 kV, as well as for ensuring the required visible insulation gap between open ones.
VN-RA are switching devices with an autogas arc extinguishing device. The switches are used in SSR chambers, complete transformer substations or other distribution devices of internal installation.
Climatic type of execution U3 according to GOST 15150.
Normal operation of load switches is ensured under the following conditions:
1. Altitude above sea level - no more than 1000 m;
2. The environment is non-explosive, does not contain conductive dust, aggressive gases and vapors in concentrations that reduce the parameters of the KTP to unacceptable limits;
3. Atmosphere type - II according to GOST 15150;
4. Ambient temperature - from -25°C to +40°C.
The main technical characteristics are given in the table.
|
Parameter name |
Parameter value |
|
Rated voltage, kV |
10 |
|
Rated operating voltage, kV |
12 |
|
Rated current, A |
400 or 630 |
|
Rated tripping current, A |
400 or 630 |
|
Rated electrodynamic withstand current, kA |
51 |
|
Thermal resistance current for 1s, kA |
20 |
|
Normalized mechanical resistance to wear, cycles |
2000 |
|
Switching resistance to wear, cycles |
100 |
Example of an order entry for a load break switch with a rated current of 630 A without a fuse, without grounding knives on the side of the lower and upper contacts:
Load break switch VN-RA TOV-10-630-16 U3 TU U 31.2-14152239-005:2006.
When ordering, it is also necessary to indicate the customer's payment and shipping details.
