Page 9 - Enclosed

SAFET Y SWITCHES 9

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Enclosed safety switches

For demanding operating conditions 02

Every aspect of our enclosed safety switches is designed for safety and dependable
performance, even in demanding operating conditions. This helps ensure that
machinery can't be accidentally started while maintenance is in progress.

Tried and tested performance
To ensure maximum safety, it is always good
practice to use a separate switch for normal start
and stop and to use the safety switch only during
repair and maintenance. ABB’s range includes side
and front operated safety switches from 16 to 1200
Amperes, with power ratings from 7.5 to 1200 kW up
to 690 V. The ratings correspond to utilization
category AC-23A.

Enclosures are available in plastic, aluminum, steel
sheet, stainless steel sheet and acid-proof material.
The appropriate material can be selected according
to preference or application. All our safety switches
have been tested according to IEC 60947-3 standard.
After rigorous testing, our safety switches have
proven to maintain a high degree of safety.

Our safety switches are delivered with an auxiliary
contact that can be used for electrical interlocking.
This is done by connecting the safety switch to a
starter or other motor control devices. For easy
identification, each safety switch has a sticker label.
For the most extreme operational conditions,
corrosion-resistant gold plated auxiliary contacts
are available upon request.

Ensured EMC safety
ABB’s design also takes into consideration the need
for reliable performance in environments with
electromagnetic disturbances (EMC), with full
compliance with IEC 61000-6-3/4 or EN 55011,
according to EU directive 2004/108/EC. Electro-
magnetic compatibility (EMC) refers to the ability
of a device to function despite electromagnetic
disturbances in the environment without electro-
magnetically disturbing other devices in its
surroundings. This is important in environments
where the disturbance from frequency converters
may rise up to tens, or even hundreds of MHz.