MANUAL MOTOR STARTER GUIDE
APRIL 19
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2.4.6.2 Auxiliary contacts HK1 und HKF1
Auxiliary contacts HK1 and HKF1 change position with the main contacts of the manual motor starter. They open and
close a separate circuit depending on the position of the manual motor starter. The interface on the main device is
the breaker. The HK1 is mounted laterally on the right side of manual motor starter and the HKF1 is mounted on the
front side.
Figure 8: Auxiliary contacts HK1 und HKF1.
Auxiliary contacts are available in various versions as normally open or normally closed contacts. From the designa-
tion of the auxiliary contact, it can be seen whether it acts as an NC or NO contact. While HK1-11 and HKF1-11 have an
opening and a closing contact, HK1-20 and HKF1-20 have just two NO contacts.
2.4.6.3 Signaling contacts SK1 and CK1
Signaling contacts signal the tripping of the manual motor starter with the protruding orange button. The SK signal-
ing contact signals tripping regardless if it was caused by short-circuit or an overload. The CK signaling contact
signals tripping in case it was caused by short-circuit. Both signaling contacts are attached on the right side of the
main device and have a test function, which is activated by engaging in an opening window on the front of the unit
with a screwdriver.
Like auxiliary contacts, signaling contacts are also available as normally open or normally closed contacts. The no-
menclature of the type designation corresponds to the logic of the auxiliary contacts.
Figure 9: Signaling contacts SK1 and CK1.
