Siemens 3RB22 Manual Del Usuario página 25

4 Operation
4.1 Setting current and tripping category
3ZX1012-0RB22-1AA1
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 and the trip class (CLASS,
MAX
one sets the motor current between 10 and 100% of the
selected maximum current I
characteristics, see
In case of > 40% asymmetry (acc. to NEMA) and phase
failure, a tripping operation is executed acc. to
characteristic curves are valid for cold starting. For starting
with pre-loading, tripping times t
Note
Motor, lines and contactor must be designed for the respective trip
class (CLASS).
Prior to initial commissioning, check the CLASS
7
setting!
Using the rotary button for the trip classes
7
(CLASS), select the appropriate tripping
characteristic (see
Note
The rotary switch must lock into place when setting the CLASS / I
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
(
Fig. IVb
MAX
.
Fig. IX
are reduced.
A
).
Fig. IV, IX and X
Operation
), the other
Fig. IVa
). For tripping
. The
Fig. X
e
15