Installation and commissioning
DIGIDRIVE
Variable speed drive
Réf. 3218 GB - 4.33 / d - 02.02
LEROY-SOMER
25
CAUTION:
• The use of high-capacity cables reduces by half the maximum length shown in the
table on the previous page.
• The maximum length of the motor cables may differ from that shown in the table on
the previous page. In fact, the maximum length of the motor cables varies in inverse
proportion to the switching frequency variation. Since the lengths in the table are given
for a switching frequency of 6 kHz, the length of other switching frequencies can be
deduced from this. Examples:
- maximum length of motor cables at 3 kHz = maximum length at 6 kHz multiplied by 2
- maximum length of motor cables at 12 kHz = maximum length at 6 kHz divided by 2
3.4.2 - Conformity to UL standards
The drive must be incorporated in an installation which can deliver 5000 rms symmetrical
Amps maximum at a voltage of 264VAC rms maximum for type "M" or "TL" 230V drives or
528VAC rms maximum for type "T" 400V drives.
The drive has integral motor overload protection (150% of the full load current). For this
protection to work correctly, it is necessary to set parameter 0
0
6
6
to "motor rated current".
To ensure the drive conforms to UL standards, use UL standard quick-blowing fuses according
to the table below.
DIGIDRIVE rating Fuse type
0.5M to 1.5M
Class CC quick-blowing fuses
eg: Limitron KTK by Bussman, Amp-trap ATM by Gould (or equivalent)
Class CC quick-blowing fuses
eg: Limitron KTK by Bussman, Amp-trap ATM by Gould (or equivalent)
except in the following cases:
1.5M/TL to 5.5TL • 3.5M/TL used in single-phase: class J 35A quick-blowing fuses
eg: JLS35 Littelfuse Power Gard
1.5T to 5.5T • 5.5TL: class CC 30A quick-blowing fuses
• 3.5M/TL used in single-phase, and 5.5TL: the power supply wiring for
the power must be made up with UL approved cables type
12 AWG (terminal width 8.0 mm maximum) to standard UL 486 A/C
8TL and 11TL
Class J 35A quick-blowing fuses
eg: A4J35 Amp-Trap by Gould, JLS35 Littelfuse Power Gard
(or equivalent)
8T and 11T
Class CC quick-blowing fuses
eg: Limitron KTK by Bussman, Amp-Trap ATM by Gould (or equivalent)
16T and 27T
Class J 40A quick-blowing fuses
eg: A4J40 Amp-Trap by Gould, JLS40 Littelfuse Power Gard
(or equivalent)
33T to 50T Class RK1 600VAC fuses
Normal
capacity
cable
High
capacity
cable
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