Page 421 - Din prodcuts 2020

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Auxiliary elements for S800
S800-AUX/ALT

4
S800-AUX/ALT
Combined auxiliary and signal contact for the external display
The S800-AUX/ALT combined auxiliary and signal contact is used for electrical signaling of
the operating state of the high performance MCB.
The AUX auxiliary contact always switches simultaneously with the live conductor contact
and detect the following forms of tripping:
• Manual switch on/off
• Tripping due to thermal overload
• Tripping due to magnetic overload (short-circuit)
• Tripping by S800-SOR or S800-UVR

The ALT signal contact detects the following forms of tripping of the high performance MCB:
• Tripping due to thermal overload
• Tripping due to magnetic overload (short-circuit)
• Tripping by S800-SOR or S800-UVR

Mode of function of the test button
The test button is operated by a tool and allows the user to simulate the mode of function
of the combined auxiliary and signal contact when switched on without tripping the high
performance MCB itself.

Mode of function of the ALT reset button
The reset button, which can be used at will, resets the ALT signal contact after a tripping.
The high performance MCB is switched on independent of the state of the ALT signal contact.

Mode of function of the AUX changeover contact
• Off position of the high performance MCB Contact 11–12 closed
• On position of the high performance MCB Contact 11–14 closed

Mode of function of the ALT changeover contact
• No ALT tripping Contact 95–96 closed
• ALT tripping Contact 95–98 closed