Voltage stabilizer.
ESD 10 K is a voltage regulator that maintains the output power supply constant at 230 V, provided that the input voltage is within a range of 140 to 250 V (when working with 220 V input) or within a range of 60 to 130 V (when working with 110 V input), and a load of 10 KVA can be connected. Input is via a 32 A IEC 60309 (F+N+T) connector. It has an adjustable switch-on delay of 3 or 6 seconds, after which it switches to normal operating mode. It incorporates overvoltage, overtemperature and excess output current protections. It has a 63 A double circuit breaker on the front panel and a switch that adjusts the output voltage between 1% and 3%.