What this 3VA2 frame delivers
Its interrupting capacity reaches 330 kA at 240 V AC and 242 kA at 415/440 V AC, dropping to 187 kA at 500 V and 4.5 kA at 690 V — the 690 V figure is the limiting case for high-voltage low-fault installations. The 250 A rating holds flat from 40 °C through 50 °C ambient, then derates linearly to 213 A at 70 °C; the operating range spans -25 °C to +70 °C, with storage from -40 °C to +80 °C.
