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.
|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|
|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|
|Design||Working position vertical, cooling - air|
|Stability for mechanical influences||М3 according GOST 17516.1-90|
|Protection against influence of an environment and from contact with current carrying circuits||Protection level IP01 according GOST 14254-96|
|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.