Operation
3ZX1012-0RB22-1AA1
15
English
4
Operation
4.1
Setting current and tripping category
The setting value of the motor current Ie is adjusted using two
rotary buttons. One rotary button is used to set the maximum
current I
MAX
and the trip class (CLASS,
Fig. IVa
), the other
one sets the motor current between 10 and 100% of the
selected maximum current I
MAX
(
Fig. IVb
). For tripping
characteristics, see
Fig. IX
.
In case of > 40% asymmetry (acc. to NEMA) and phase
failure, a tripping operation is executed acc. to
Fig. X
. The
characteristic curves are valid for cold starting. For starting
with pre-loading, tripping times t
A
are reduced.
Note
Motor, lines and contactor must be designed for the respective trip
class (CLASS).
7
Prior to initial commissioning, check the CLASS
setting!
7
Using the rotary button for the trip classes
(CLASS), select the appropriate tripping
characteristic (see
Fig. IV, IX and X
).
Note
Using the sealable covering 3RB2984-2, you can protect the
rotary buttons and the function expansion module against
inadvertent operation. To do this, attach the cover (see graphic
section
Fig. III
).
Summary of Contents for 3RB22
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