Tavrida Electric Single-Phase Vacuum Circuit Breakers
Single-Phase VCB Series - Technical Details
| Rated Data | ISM15_LD_3 | ISM25_LD_3 | ISM15_MD_3 |
|---|---|---|---|
| Rated voltage (Ur), up to | 15kV | 27kV | 15kV |
| Rated continuous current (Ir) | to 1000A | to 800A | 1250А |
| Rated power frequency withstand voltage (Ud) | 36kV | 60kV | 36kV |
| Rated lightning impulse withstand voltage (peak) (Up) | 95kV | 125kV | 95kV |
| Rated short-circuit breaking current (Isc) | 20kA | 16kA | 31.5А |
| Rated peak withstand current (Ip, close and latch) | 52kA | 42kA | 82kA |
| Rated short-time withstand current, 4s (Ik) | 20kA | 16kA | 31.5 |
| Rated frequency | 50-60Hz | ||
| Switching Performance | ISM15_LD_3 | ISM25_LD_3 | ISM15_MD_3 |
|---|---|---|---|
| Mechanical life (CO cycles) | 50 000 | 30 000 | 50 000 |
| Operating cycles, rated current (CO cycles) | 50 000 | 30 000 | 50 000 |
| Operating cycles, rated–short circuit breaking current | 100 | 100 | 50 |
|
Closing time |
30ms | 35ms | 20ms |
| Opening time | 15ms | 15ms | 8ms |
| Break time | 23ms | 23ms | |
| Rated operating sequence | O-0.3s-CO-10s-CO | ||
| Rated operating sequence at rated short-circuit breaking current | O-0.3s-CO-15s-CO | ||
| Standards | ISM15_LD_3 | ISM25_LD_3 | ISM15_MD_3 |
|---|---|---|---|
| Design class with regard to severity of service conditions in accordance with IEC 932, IEC 60932 | Class 1 | Class 0 | Class 0 |
| International testing standards | IEC 62271-100, GB 1984-2003, ANSI C37.04, C37.06, C37.09, C37.09a | IEC 62271-100, GB 1984-2003, IEEE C 37.09 | |
| Mechanical vibration withstand capability according to IEC 721-3-4, IEC 60271, IEC 60068 | Class 4M4 | ||
| Other Data | ISM15_LD_3 | ISM25_LD_3 | ISM15_MD_3 |
|---|---|---|---|
| Resistance of main circuit | <40µOhm | <40µOhm | <17µOhm |
| Type of driving mechanism | Monostable magnetic actuator | ||
| Weight |
13kg (26.66lbs) |
14kg (30.86lbs) |
13kg (26.66lbs) |
| Auxiliary contacts | ISM15_LD_3 | ISM25_LD_3 | ISM15_MD_3 |
|---|---|---|---|
| Number of available auxiliary contacts | 2 NO + 2 NC | ||
Single-Phase VCB Series – Weight and Dimensions
15,5 kV Light Duty VCB ISM15_LD_3 Series
27 kV Light Duty VCB ISM25_LD_3 Series
15.5 kV Medium Duty VCB ISM15_MD_3 Series
Tavrida VCB series - Documentation
Technical Manuals
Booklets
