Siemens SINAMICS G120 Operations Instructions Page 38

  • Download
  • Add to my manuals
  • Print
  • Page
    / 304
  • Table of contents
  • BOOKMARKS
  • Rated. / 5. Based on customer reviews
Page view 37
Installing
3.3 Installing the Power Module
Inverter with CU240B-2 and CU240E-2 Control Units
36 Operating Instructions, 01/2011, FW 4.4, A5E02299792B AB
Note
Electrical protective equipment
Ensure that the appropriate circuit breakers / fuses for the inverter's rated current are fitted
between the line and inverter (see catalog D11.1).
Connecting the motor: Star connection and delta connection
With SIEMENS motors, you will see a
diagram of both connection methods on
the inside of the cover of the terminal
box:
Star connection (Y)
Delta connection (Δ)
The motor rating plate provides
information about the correct connection
data.
6WDUFRQQHFWLRQ'HOWDFRQQHFWLRQ
9 9
8
8
:
8
8
9
9
:
:
8
8
9
9
:
::
Examples for operating the inverter and motor on a 400 V line supply
Assumption: The motor rating plate states 230/400 V Δ/Y.
Example 1: A motor is normally operated between standstill and its rated speed (i.e. a speed
corresponding to the line frequency). In this case, you need to connect the motor in Y.
Operating the motor above its rated speed is only possible in field weakening, i.e. the motor
torque available is reduced above the rated speed.
Example 2: If you want to operate the motor with the "87 Hz characteristic", you need to
connect the motor in Δ.
With the 87 Hz characteristic, the motor's power output increases. The 87 Hz characteristic
is mainly used with geared motors.
Page view 37
1 2 ... 33 34 35 36 37 38 39 40 41 42 43 ... 303 304

Comments to this Manuals

No comments