Mains Contactors - Eaton PowerXL DA1 Series Installation Manual

2 Engineering
2.3 Safety and switching

2.3.5 Mains contactors

54
The mains contactor enables operational switching on and off of the supply
voltage for the variable frequency drive and switching off in case of a fault.
The mains contactor is designed based on the mains-side input current I
the DA1 variable frequency drive for utilization category AC-1 (IEC 60947)
and the ambient air temperature at the location of use.
￫
The mains contactors listed here are based on the variable
frequency drive's rated input-side mains current I
external mains choke.
These are selected based on thermal current I
the indicated ambient temperature.
WARNING
Push-to-run operation is not permissible via the mains contactor
(Pause time ≧ 30 s between switching off and on).
￫
For UL-compliant installation and operation, the mains-side
switching devices must allow for a 1.25 times higher input
current.
￫
For the rated mains contactors for DA1 variable frequency
drives, please refer to the technical data chapter
in￫ section 6.6, "Mains contactors", page 169.
DA1 Variable Frequency Drives 08/18 MN04020005Z-EN www.eaton.com
of
LN
without an
LN
= I (AC-1) at
th e