Use
1. Open the activation switch, or activate the safety functionality that is wired to the STO
connection.
2. The STO inputs on the drive control unit de-energize, and the control unit cuts off the
control voltage from the output IGBTs.
3. The control program generates an indication as defined by parameter
31.22
(see the
firmware manual of the drive).
4. The motor coasts to a stop (if running). The drive will not restart while the activation
switch or safety relay contacts are open.
5. Deactivate the STO by closing the activation switch, or resetting the safety functionality
that is wired to the STO connection.
6. Reset any faults before restarting.
WARNING!
The Safe torque off function does not disconnect the voltage of the main and
auxiliary circuits from the drive. Therefore maintenance work on electrical parts of
the drive or the motor can only be carried out after isolating the drive from the
supply and all other voltage sources.
WARNING!
The drive cannot detect or memorize any changes in the STO circuitry when the
drive control unit is not powered. If both STO circuits are closed and a level-type
start signal is active when the power is restored, it is possible that the drive starts
without a fresh start command. Take this into account in the risk assessment of
the system.
WARNING!
(With permanent magnet or synchronous reluctance [SynRM] motors only)
In case of a multiple IGBT power semiconductor failure, the drive can produce an
alignment torque which maximally rotates the motor shaft by 180/
p
degrees (with
permanent magnet motors) or 180/2
p
degrees (with synchronous reluctance
[SynRM] motors) regardless of the activation of the Safe torque off function.
p
denotes the number of pole pairs.
Notes:
• If a running drive is stopped by using the Safe torque off function, the drive will cut off
the motor supply voltage and the motor will coast to a stop. If this causes danger or is
not otherwise acceptable, stop the drive and machinery using the appropriate stop mode
before activating the Safe torque off function.
• The Safe torque off function overrides all other functions of the drive.
• The Safe torque off function is ineffective against deliberate sabotage or misuse.
• The Safe torque off function has been designed to reduce the recognized hazardous
conditions. In spite of this, it is not always possible to eliminate all potential hazards. The
assembler of the machine must inform the final user about the residual risks.
The Safe torque off function 225
Содержание ACS880-14
Страница 1: ...ABB INDUSTRIAL DRIVES ACS880 14 drive modules 132 400 kW 200 400 hp Hardware manual...
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Страница 114: ...With twin connectors in the control panel holder 1 2 3 1 114 Electrical installation...
Страница 115: ...With FDPI 02 modules OPEN TERMIN ATED 1 1 2 2 OPEN TERMINATED 3 Electrical installation 115 11...
Страница 142: ...4 5 6 3 3 1 1 1 1 2 142 Installation example with full cabling panels option H381...
Страница 150: ...150 Installation example with full cabling panels option H381...
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Страница 204: ...Standard configuration 204 Dimension drawings...
Страница 205: ...Location of power cable connection terminals with options H370 H356 3AXD50000038012 Dimension drawings 205...
Страница 206: ...Drive module with options 0B051 H356 0H371 206 Dimension drawings...
Страница 207: ...Configuration with option H381 3AXD50000323210 Dimension drawings 207...
Страница 208: ...LCL filter module 208 Dimension drawings...
Страница 212: ...External control unit 3AXD50000011687 212 Dimension drawings...
Страница 230: ...Declaration of conformity 230 The Safe torque off function...
Страница 236: ...Combi screw M8 30 Hex 20 N m 14 75 lbf ft Tapping screw M6 12 Torx T30 Hex 8 N m 71 lbf in 8 10 9 11 12 236...
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