Line protection breaker with ETU320 — 800 A, 3-pole
It's configured for line protection duty — meaning the trip curve and accessories are set for feeder or main breaker applications rather than motor branch protection. Breaking capacity runs 187 kA at 240 V, 121 kA at 415 V, and 53 kA at 690 V — figures that put it in the high-interrupting category for industrial distribution panels where fault currents are substantial. The 800 A frame size with this interrupting level suits it for main service entrance or large subfeed applications where selectivity with downstream breakers is a design requirement. The ETU320 release offers adjustable long-time pickup (Ir) from 320 A to 800 A, short-time pickup (Ii) from 1200 A to 8000 A, and long-time delay (tr) adjustable from 0.5 to 17 seconds. That range gives the specifying engineer room to coordinate with downstream devices across a typical industrial facility's fault-current profile.
Panel fit and thermal derating
Front IP40 protection means it's suited for enclosed distribution boards where the door provides the environmental seal. For a panel designer pushing ambient near the upper limit, that derating curve is the number to check against the connected load. Maximum power loss is 135 W — a figure that factors into enclosure ventilation calculations when multiple breakers are ganged in a single cabinet.
Operating environment and approvals
No ground-fault monitoring module is integrated — that's a separate accessory add-on if the application requires it.