High-voltage commutators
High-voltage KVU-type commutators are intended for switching pulse currents 10 – 400 kA at operating voltages 0.5 - 100 kV in capacitor banks.
The commutator allows to form a pulse voltage on load with a delay not more than 2 μs after an optical triggering impulse with rate of current rising up to 10 kA/μs. The commutator is made of modern element base with high-current triggered vacuum switchers (TVS), high-speed control optical elements and high-speed MOSFET and IGBT-transistors.
Range of application of high-voltage commutators: power supply systems for pulse loads, high-speed protection systems of consumers at emergency operation (from short-circuit currents), crowbar switching.
Different voltage and current models of KVU-type commutators are presented in the following table.
| Model | KVU-60 | KVU-100 |
| Electric parameters | ||
| Rated voltage, kV | 0.5-60 | 0.5-100 |
| Rated current, kA | 10-300 | 10-400 |
| Maximum charge per impulse, C | 160 | 160 |
| Electrical strength recovery time, us | 100 | 100 |
| Auxiliary power supply voltage, V | 12 V battery | |
| Optical parameters | ||
| Type of the optical transmitter | HFBR1412TZ (AVAGO) | |
| Type of the optical receiver | HFBR2412TZ (AVAGO) | |
| Optical patchcord | 62,5/125 μm MM, connectors ST-ST, simplex, 0,5 m, 0,8 m | |
| Mechanical parameters | ||
| Design | Working position vertical, cooling - air | |
| Stability for mechanical influences | М3 according GOST 17516.1-90 | |
| Dimensions, mm | 316*316*670 | 316*316*950 |
| Weight, kg | 33 | 50 |
| Environment | ||
| Protection against influence of an environment and from contact with current carrying circuits | Protection level IP01 according GOST 14254-96 | |
| Climatic modification |
All-climatic modification according GOST 15543.1-89 |
|
| Interval of working temperatures | from 0 up to + 40 °С | |
| Calculated service life | ||
| Semiconductor devices | Not less than 100 hundred hours | |
| Triggered vacuum switches* | 50000 pulses | |
*. It is calculated with algorithm depending on current value.