Technical Data: Series: Tmax XT Frame Size: XT3 Rated Current (In): 185 A (This is the maximum continuous current the breaker frame can handle. The actual trip unit setting range is lower, see below). Number of Poles: 3 Poles (3P) Breaking Capacity: Icu (Ultimate Breaking Capacity): 85 kA at 400/415V AC Ics (Service Breaking Capacity): 75 kA at 400/415V AC (100% of Icu for XT3) Rated Operational Voltage (Ue): Up to 690 V AC, 50/60 Hz Trip Unit Type: PR221DS-I Electronic Trip Unit This is a "non-communicating" (standard) electronic trip unit. Adjustable Protection Functions: L (Overload): Adjustable from 0.4 to 1 x In (e.g., for 185A frame: range ~74A to 185A). I (Short-Circuit): Adjustable from 1.5 to 10 x Ir (Ir is the set value of L). tI (Short Delay Time): Adjustable time delay for the I function. Trip Unit Settings Code: "85" specifically refers to the standard factory default setting for this unit. Mounting Type: Fixed (for panel mounting) Operation: Manual operation via a rotary handle. Can be equipped with auxiliary accessories (shunt trip, undervoltage release, auxiliary contacts, alarm switch). Standards Compliance: IEC/EN 60947-2, UL 489, CSA C22.2 No. 5.