Automatic Voltage Stabilizers available in different sizes
Single phase and three phase all available
Below are description for the ones in the picture :
SVC-45KVA Three-phase LED Input 280-520V Output 400V+2% Power 80% with bypass, obver-voltage, under-voltage, Overheat protection without waterproof shell, full copper
SVC-20KVA Three-phase LED Input 280-520V Output 400V+2% Power 80% with bypass, obver-voltage, under-voltage, Overheat protection without waterproof shell, full copper
SVC-20KVA Three-phase LED Input 280-520V Output 400V+2% Power 80% with bypass, obver-voltage, under-voltage, Overheat protection with waterproof shell, full copper
Each has its price