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4.2.2
Auxiliary and alarm switches
The auxiliary and alarm switches for 3VA molded case circuit breakers belong to an
integrated range of accessories. They can be installed in all sizes of all circuit breakers up to
1000 A.
The auxiliary and alarm switches can be very simply snapped into place and connected up in
accessory compartments provided on the front panel of the unit to the left and right of the
handle.
All auxiliary and alarm switches are designed as changeover contacts and therefore provide
a high degree of flexibility for planning and installation purposes.
HQ and HP switches
The switches are available in versions HQ and HP. HQ switches are 7 mm wide, and HP
switches 14 mm wide.
Both switch versions can be combined extremely flexibly in a molded case circuit breaker.
This level of compatibility means that two HQ switches can be optionally installed in place of
one HP switch.
HQ and HP switches have the same functionality, but differ in terms of the following features:
● Connection technology
– HQ: One conductor per contact point
– HP: Two conductors per contact point possible (loop-through)
● Key electrical data
– HQ: max. 250 V; max. 6 A
– HP: max. 600 V; max. 10 A
Individual key electrical data can be found at the end of this chapter.
All HQ switches are also available in an electronics-compatible version (HQ_el).
The electronics-compatible auxiliary switches (HQ_el) are specially optimized for switching
small voltages and currents. They are therefore particularly useful for alarms in the vicinity of
PLC controllers, for example.
3VA molded case circuit breakers with IEC certificate
Manual, 03/2019, A5E03603177010-03
Accessories
4.2 Internal accessories
197
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