ABB ACS880-07 - Implementing an ATEX-Certified Motor Thermal Protection; Implementing the Prevention of Unexpected Start-Up Function; Implementing the Safe Torque off Function

Implementing the Safe torque off function
See chapter The Safe torque off function (page 307).
Implementing the Prevention of unexpected start-up
function
You can order the drive with a Prevention of unexpected start-up (POUS) function.
The POUS function disables the control voltage of the power semiconductors of the
drive (inverter) output stage. This prevents the drive from generating the torque
required to rotate the motor. POUS enables a short-time maintenance work (like
cleaning) on the non-electrical parts of the machinery without switching off and
disconnecting the drive.
See the appropriate option manual for more information.
Note: The UCU control unit does not support option +Q950.
Manual code
(English)
User’s manualOption
code
3AUA0000145922Prevention of unexpected start-up, with FSO-xx safety functions module+Q950
3AUA0000119910Prevention of unexpected start-up, with safety relay+Q957
Implementing an ATEX-certified motor thermal protection
With option +Q971, the drive provides ATEX-certified safe motor disconnection without
contactor using the drive Safe torque off function. To implement the thermal protection
of a motor in explosive atmosphere (Ex motor), you must also:
• use an ATEX-certified Ex motor
• order an ATEX-certified thermistor protection module for the drive (option +L537),
or acquire and install an ATEX-compliant protection relay
• do the necessary connections.
For cabinet-built drives, an ATEX-certified motor thermal protection function is also
available (option +L513+Q971, or +L514+Q971). The drive is equipped with an
ATEX-certified Safe motor disconnection function and with ATEX-compliant protection
relays for PTC or Pt100 temperature sensors.
For more information, see:
Manual code
(English)
User's manual
3AUA0000132231ATEX-certified Safe disconnection function, Ex II (2) GD for ACS880 drives (+Q971)
application guide
3AXD50000027782FPTC-02 ATEX-certified thermistor protection module, Ex II (2) GD (option
+L537+Q971) for ACS880 drives user's manual
3AXD50001096700FPTC-02 ATEX-certified thermistor protection module, instructions for pairing the
module with an ATEX-certified drive
3AXD50000014979ATEX-certified motor thermal protection functions for cabinet-built ACS880 drives
(options +L513+Q971 and +L514+Q971) user’s manual
Guidelines for planning the electrical installation 109