204
Digitax ST User Guide
Issue: 5
15 UL listing information
Digitax ST drives have been assessed to comply with both ULus and
cUL requirements.
The Control Techniques UL file number is E171230. Confirmation of UL
listing can be found on the UL website: www.ul.com.
15.1
Common UL information
Conformity: The drive conforms to UL listing requirements only when the
following are observed:
•
Class 1 60/75 °C (140/167 °F) copper wire only is used in the
installation.
•
The surrounding air temperature does not exceed 45 °C (113 °F)
when the drive is operating.
•
The terminal tightening torques specified in section 3.7
on page 20 are used.
•
The drive is installed in a type 1 enclosure, or better, as defined by
UL50. The drive has a UL ‘opentype’ enclosure rating.
•
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. The drive does not comply with UL if MCBs
are used in place of fuses.
•
If the drive control stage is supplied by an external power supply
(+24 V), the external power supply must be a UL Class 2 power
supply.
Motor overload protection
All models incorporate an internal overload protection model for the
motor load that does not require the use of an external or remote
overload protection device. Overload protection is provided at 105 % the
FLA of the device. The duration of the overload is dependent on the
motor's thermal filter (a value up to 3000 seconds that is able to be
entered into the drive - default value is 89 seconds). Refer to ‘Menu 4
advanced parameter descriptions’ in the
Digitax ST Advanced User
Guide
for further information.
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.
15.2 AC supply specification
The drive is suitable for use in a circuit capable of delivering not more
than 100,000 RMS symmetrical Amperes at 264 Vac RMS maximum
(200 V drives), 528 Vac RMS maximum (400 V drives).
15.3 Maximum continuous output current
The drive models are listed as having the maximum continuous output
currents (FLC) shown in Table 15-1 and Table 15-2.
Table 15-1 Maximum continuous output current (200 V drives)
Table 15-2 Maximum continuous output current (400 V drives)
15.4 Common DC bus
The drive can also be used with common DC bus for UL applications as
follows: -
Drives can be connected so as to have a common DC bus from a single
feed. The power rating of the main fed drive shall not be exceeded.
Fusing is not required between the DC bus fed drives, only the main
supplied drive is required to be fused. The maximum capacitance to be
connected together for the 480 Vac drives is 880
μ
F and for the 230 Vac
drives is 2200
μ
F (the capacitance includes the mains supplied drive).
Model
FLC (A)
DST1201
1.7
DST1202
3.8
DST1203
5.4
DST1204
7.6
Model
FLC(A)
DST1401
1.5
DST1402
2.7
DST1403
4.0
DST1404
5.9
DST1405
8.0
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