The Siemens 3VA2510-6HL32-0KC0 is a 3-pole IEC frame 1000 molded-case circuit breaker with an 85 kA interrupting capacity at 415 V (breaking capacity class H). It's built around the ETU320 LI electronic trip unit — that's a line-protection curve (LI) meaning it provides long-time (overload) and instantaneous (short-circuit) protection, no short-time delay. The rated continuous current In is 1000 A, with the overload pickup Ir adjustable from 400 A to 1000 A, and the instantaneous pickup Ii adjustable from 1.5 to 10 times In. This breaker ships with a shunt trip (left-side mounted, 208–277 V AC / 220–250 V DC) and two auxiliary switches already installed — so it's ready for remote tripping and status feedback out of the box.
For selectivity coordination downstream, the LI curve (no short-time delay) means this breaker will trip instantaneously on a short-circuit, so it's best applied as a main or feeder breaker where you don't need delayed coordination with downstream breakers. The 1000 A frame and adjustable Ir (400–1000 A) let you dial in the exact overload setting for the connected load — typically a large transformer, busway, or a group of motor starters. The shunt trip (left-side, 208–277 V AC / 220–250 V DC) allows remote emergency-off or supervisory tripping, and the two auxiliary switches provide position feedback (open/closed) to a PLC or status panel.
This is an IEC frame 1000 breaker — physically large, intended for bolted connection in a switchboard or MCC bucket, not a snap-on DIN rail mount. The shunt trip and auxiliary switches are factory-installed on the left side, so verify clearance on that side for wiring access. The ETU320 trip unit is field-adjustable via rotary dials on the front face; no software or handheld programmer needed for the LI settings.