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Vacuum circuit-breakers 10 kV of VGG-10 series represent generation of generator switching facility and it is the first and the only apparatus of such type in CIS. The circuit-breaker is equipped with vacuum cameras by Siemens and intended to commutate generator circuits at rated currents up to 5000 A. The apparatus was developed for retrofit and renovation of MGG-10 circuit-breaker.
Low-oil circuit-breakers 10 kV of MGG-10 series are intended for commutation 10 kV generator circuits at normal and emergency modes at rated currents up to 5600 A. The have been manufactured both for use in moderate and tropical climates.
Low-oil circuit-breakers 15 kV of VGM-15 series are intended for commutation 15 kV generator circuits at normal and emergency modes at rated currents up to 11200 A (with use of current cut-off).
Low-oil circuit-breakers 20 kV of MGU-20 series are intended for commutation 20 kV circuits at normal and emergency modes in the systems with insulated or partially grounded neutral. The apparatuses should be installed in cameras with forced air-circulation.
|
VGG-10 |
MGG-10 |
VGM-15 |
MGU20 |
| Rated voltage, kV |
10 |
10 |
15 |
20 |
| Rated current, A |
4 000; 5 000 |
2 000 – 5 600 |
10 000 - 11 200 |
5 700 – 9 500 |
| Rated breaking current, kA |
63 |
45; 63 |
71; 90 |
75; 90; 105 |
|
Short-circuit current, kA |
|
|
|
|
| - highest peak |
161 |
120; 170 |
290; 320 |
270; 300 |
| - thermal withstand current (for 3 sec), kA |
63 |
45; 63 |
95; 105 |
95; 105 |
| Switching resource, cycles |
10 000 |
3 000 |
3 000 |
3 000 |
|
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