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Conformity
The drive conforms to UL
listing requirements only when the following are observed:
" The drive is installed
in a type 1 enclosure, or better, as defined by UL50
" Class 1 60/75°C (140/167°F) copper wire only is used in the
installation
" The ambient temperature does not exceed 40°C (104°F) when the
drive is operating
" If the drive control stage is supplied by an external power supply
(+24V), the external power supply must be a UL Class 2 power supply
Motor Overload Protection
The drive provides motor
overload protection. The overload protection level is 150% of
full-load current (FLC) of the drive in open loop mode and 175% of
full-load current (FLC) of the drive in closed loop vector or servo
modes. It is necessary for the motor rated current to be entered into
Pr 0.46 (or Pr 5.07) for the protection to operate
correctly. The protection level may be adjusted below 150% if
required. Refer to section 8.3 Current limits on page 84 for
more information. The drive also provides motor thermal protection.
Refer to section 8.4 Motor
thermal protection on page 84.
Overspeed Protection
The drive provides overspeed
protection. However, it does not provide the level of protection
afforded by an independent high integrity overspeed protection device.
Power dependant UL
information
Unidrive SP conforms to UL
listing requirements only when the following is observed:
" The correct UL-listed
class CC fast acting fuses, e.g. Bussman, Limitron KTK series, Gould
Amp-Trap ATM series or equivalent, are used in the AC supply.
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