Circuit breaker h3+ P250 LSnI 3P3D 250A 50kA FTC. The compact circuit breaker complies with DIN EN 60947-2 and protects electrical installations and networks from overload and short circuits. The tripping curve of the electronic release can be adjusted via a rotary-push switch. The triggers for overload current (Ir) and short-circuit current with time delay (Isd) are separately adjustable. The instantaneous tripping for the short-circuit current Ii is fixed. A readiness LED lights up green when the release is operational and blinks orange when an internal fault in the release is detected. Another LED starts blinking red when I = 105% Ir and lights up solid red when I > 112% Ir. The position of the knob indicates the three different operating states (ON = top, OFF = bottom, tripped = middle position). A locking device for the switch state in the ON or OFF position is integrated and can be used with a standard padlock without additional accessories. A test button allows the tripping mechanism to be tested and the main contacts to be opened. A hinged cover with a captive quick screw provides access to the installation space for optional auxiliary contacts and other releases. Integrated accessories can be seen and identified through a viewing window without opening the hinged cover. An interface for a diagnostic and configuration tool allows the set tripping curve to be tested and documented.