Download  Print this page

Operation; Setting The Current; Adjust Tripping Classes - Siemens 3RB12 Instructions Manual

Solid-state overload relay
Hide thumbs

Advertisement

4

Operation

4.1

Setting the current

4.2

Adjust tripping classes

3ZX1012-0RB12-1AA1
Use the current setting range knob to set the
appropriate current.
Note
The motor, leads and contactor must be rated for the
appropriate class. Class 10 as delivered.
Check the class setting before initial start-up and
correct it if necessary!
Use the class changeover switch to select the appro-
priate tripping characteristic (see graphic section of
Fig. VII).
In the event of unsymmetry > 40 % (as per NEMA) and
phase failure, tripping occurs as shown in Fig. VIII. The
characteristics apply to a cold start. For starting under full
load, the tripping times t
Note
With the aid of the sealable cover plate 3RB1900-0A,
the current range setting knob and the class changeover
switch can be protected from tampering. To do this,
simply snap on the cover plate instead of the middle
nameplate.
are reduced.
A
Operation
15

Hide quick links:

Advertisement

loading

  Related Manuals for Siemens 3RB12